README leads with the car screen and a table of what works

The screenshot of Vela navigating comes first, then one warning and a short table. Install
steps, the GrapheneOS note and the download check sit together, and the longer notes move
lower.

.github/release-notes.md

@@ -1,20 +1,13 @@
-Gearslip 0.3.12 gives the car screen a fresh look and fixes the wireless loop 0.3.02 caused on some head units.
+Gearslip 0.3.40 is a test build for a few cars that still don't connect.
 
-## New
-- Navigation cards sit down the left side, with a bigger turn card that shows your lane. The map keeps the right side.
-- The car screen and the phone app take their colors from your phone's Material You palette.
-- The car's settings sit on the phone's home screen, each group on its own screen.
-- Put the home screen's player left or right of the map.
-- The browser shows the page title, and it has an address bar, forward, reload, and a start page.
-- If Gearslip lacks call permissions, the car's Phone screen asks for them on the phone.
-
-## Changed
-- Gearslip uses Car App Library 1.8. Map apps show the right turn arrows and route times, and Vela works fully.
-- Setup ends with recommended apps, then the button picker, then usage notes.
+If your car works on 0.3.39, you don't need this one. If you're following #18, #39 or #57, please try it and attach a log to your issue: open Gearslip, tap Logs, then Share log.
 
 ## Fixed
-- Some head units, such as ZLink adapters, sent their Wi-Fi details twice. Gearslip rejoined the network each time and dropped the connection. It now ignores the repeat.
-- Gearslip no longer crashes when a wireless connection ends.
-- Opening a second music app without playing anything keeps the player on the song that's still playing.
-- Vela's speed sign is full size again.
-- RF Sentinel and other non-media car apps get their own tile in the launcher.
+- A car that holds back its screen is asked for it again with the detail older cars expect. This is for the 2017 Pilot (#57) and other cars on the oldest Android Auto version.
+- Music no longer carries on from the phone's speaker after you turn the car off. An app that started playing again by itself is paused a second time (#39).
+- A liked song lights up the whole like button, as shuffle and repeat do. Before, only the heart filled in for apps such as Metrolist.
+
+## Testing
+- GM cars open two more channels, Bluetooth and Wi-Fi projection, and log what the car sends on them. This is to find out why the 2021 Bolt hangs up about 20 seconds in (#18). If you drive a GM car, type your phone's Bluetooth address under Settings > Connection > Phone's Bluetooth address. You'll find it in Android's Settings under About phone.
+
+Help translate Gearslip on [Weblate](https://hosted.weblate.org/engage/gearslip/).

.github/workflows/translations.yml

@@ -0,0 +1,18 @@
+name: Translations
+
+# Weblate is the only thing that writes translated strings: it pushes straight to experimental,
+# never through a pull request. A PR that edits them collides with Weblate's own copy, and
+# Weblate locks itself until someone resets it. Edit the English strings.xml only.
+on:
+  pull_request:
+    paths:
+      - "gearslip/src/main/res/values-*/strings.xml"
+
+jobs:
+  weblate-only:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Translations go through Weblate
+        run: |
+          echo "::error::This pull request edits a translation. Please make translation changes on Weblate instead: https://hosted.weblate.org/engage/gearslip/ (it can upload a whole strings.xml under Files > Upload translation). See CONTRIBUTING.md."
+          exit 1

CARS.md

@@ -23,6 +23,7 @@ and some don't say.
 | Jeep Cherokee | 2019 | Uconnect 8.4 (Delphi) |
 | MG | 2019 | Desay SV |
 | Ram 1500 | 2018 | Uconnect 8.4 (Panasonic) |
+| Renault Clio V | 2019-2024 | Easy Link |
 | Škoda | 2018 | MIB Standard2 (TechniSat) |
 | Subaru Outback | 2020 | Denso |
 | Toyota RAV4 | 2020 | Pioneer T1 |

CLA.md

@@ -88,6 +88,9 @@ We are not required to use or include any Contribution.
 Most contributors sign on GitHub: the CLA Assistant bot comments on your first pull request,
 and you sign there with one click. Your GitHub account then serves as your signature.
 
+Translators sign on Weblate: it shows this agreement before your first translation, and
+accepting it there serves as your signature.
+
 To sign by hand instead, fill in the following and send it to us on Matrix. The address is
 on the [Seb3thehacker GitHub profile](https://github.com/Seb3thehacker).
 

CONTRIBUTING.md

@@ -38,6 +38,24 @@ branch on `experimental`, and open your pull request against it.
 - Gearslip asks for no adb, root, or Shizuku. A feature must work with ordinary Android
   permissions and on-device consent dialogs.
 
+## Translating
+
+Translations happen on [Weblate](https://hosted.weblate.org/engage/gearslip/), never in pull
+requests. Pick your language, or start a new one, and translate in the browser. Weblate
+sends the finished work to this repository as a pull request.
+
+Don't edit the translated `values-*/strings.xml` files by hand. Weblate keeps its own copy of
+every language, so a change made in git collides with Weblate's next update, and the pull
+request that made it gets closed. If a code change adds or rewords text, change only the
+English file, `values/strings.xml`; Weblate picks up the new strings for translators.
+
+Keep the tone of the English: short, plain, and friendly. Leave placeholders such as `%1$s`
+and `%1$d` in place; Gearslip fills them with names and numbers. Untranslated strings show
+in English, so a partial translation is still useful.
+
+Before your first translation, Weblate asks you to accept the
+[Contributor License Agreement](CLA.md). That counts as signing it.
+
 ## Writing
 
 Text that users read, such as screens, release notes, and docs, follows Strunk's

README.md

@@ -4,107 +4,93 @@
 
 An Android Auto alternative built for everyone.
 
+[<img src="https://raw.githubusercontent.com/ImranR98/Obtainium/main/assets/graphics/badge_obtainium.png" alt="Get it on Obtainium" height="80">](https://apps.obtainium.imranr.dev/redirect?r=obtainium://add/https://github.com/twinksoftware/gearslip)
+
+![Vela Maps navigating on the car screen, with the music player beside the map](docs/screenshots/navigation.png)
 
 [![forthebadge](https://forthebadge.com/badges/compatibility-club-penguin.svg)](https://forthebadge.com)
 
-[<img src="https://raw.githubusercontent.com/ImranR98/Obtainium/main/assets/graphics/badge_obtainium.png" alt="Get it on Obtainium" height="80">](https://apps.obtainium.imranr.dev/redirect?r=obtainium://add/https://github.com/twinksoftware/gearslip)
+Gearslip speaks the Android Auto protocol straight to your car, over USB or wireless, with no
+Google software in the path. Map, music, and messaging apps draw their car screens through
+Gearslip, and it adds a player, calls, voice, and a web browser of its own.
 
-Questions, ideas?
-[Join the discussion on Matrix](https://matrix.to/#/!mf0_mgBd5KqKpc9FfX_wHp1jFCcwAtPrndIn_oGIyMk?via=matrix.org).
+> [!WARNING]
+> Gearslip is **alpha software**. It can drop the connection, freeze the car screen, or fail
+> to start, and a new release can break a car that worked before. Set it up while parked, and
+> keep another way to navigate.
 
-## Which cars work
+Questions, ideas? [Join the discussion on Matrix](https://matrix.to/#/!mf0_mgBd5KqKpc9FfX_wHp1jFCcwAtPrndIn_oGIyMk?via=matrix.org).
 
-Most cars work. Starting around 2020, some cars added newer security standards that reject
-Gearslip's certificate, and Gearslip can't run in those cars. [CARS.md](CARS.md) lists the
-cars drivers have confirmed.
-
-## What Gearslip is
-
-Gearslip is an Android Auto client for the phone. It speaks the Android Auto protocol
-directly to a car head unit, over USB or wirelessly, with no Google software in the path.
-Gearslip acts as a Car App Library host: an app that ships a car interface hands Gearslip
-a template, and Gearslip renders that template natively on the car screen. Nothing is
-mirrored from the phone. For apps without a car interface, Gearslip offers a separate
-screen-sharing mode.
+## What works
 
 | | |
 |---|---|
-| ![The launcher, with every car app on the phone and the route in the bar below](docs/screenshots/launcher.png) | ![Vela Maps showing the route, with the music player beside the map](docs/screenshots/navigation.png) |
-| Your car apps in one place. A red X marks the ones that don't work yet. | Vela Maps navigating, with the player beside it. |
-| ![Metrolist's song, art, and controls in Gearslip's player](docs/screenshots/music.png) | ![A new message card over Vela Maps](docs/screenshots/message.png) |
-| Metrolist in Gearslip's player. | A new message, read aloud at a tap, over the map. |
-| ![The dashboard, with the weather, the week ahead, and recent notifications](docs/screenshots/dashboard.png) | ![DuckDuckGo open in Gearslip's web browser](docs/screenshots/web.png) |
-| The weather, your week, and what you missed. | Browse the web while parked. |
+| **Cars** | Most cars, over USB or wireless. Some cars from about 2020 on need a certificate of your own. [CARS.md](CARS.md) lists the cars drivers have confirmed. |
+| **Maps** | Organic Maps, Vela, OsmAnd, Waze, Flitsmeister, MAPS.ME, and MapQuest on the car screen, alerts included. Turns from Google Maps or Waze on the phone show in the nav bar and on the instrument cluster. |
+| **Music** | Any app built for car screens, with Now Playing, Up Next, search, and lyrics. Spotify plays through Gearslip's own player. |
+| **Calls** | Dial or search contacts, and answer or decline on the car screen. Calls use the car's Bluetooth. |
+| **Messages** | Read aloud on arrival, with a reply by voice or a quick reply. |
+| **Voice** | "Navigate to the nearest gas station", "play Daft Punk", "call Mom". Speech stays on the phone. Commands are in English for now. |
+| **Controls** | Touch, steering wheel buttons, control knobs, and D-pads. |
+| **Languages** | English and 19 more, some only partly translated. |
+| **Head units with Android** | Gearslip can be the home screen of an Android head unit, or of a spare phone or tablet on the dash. Turn on Use as launcher in Settings > Connection. |
+| **Doesn't work** | Spotify's and Google Messages' own car screens, which accept only Android Auto. TIDAL lets only approved apps browse its library. |
+
+## See it
+
+| | |
+|---|---|
+| ![The launcher, with every car app on the phone](docs/screenshots/launcher.png) | ![Metrolist's song, art, and controls in Gearslip's player](docs/screenshots/music.png) |
+| Your car apps in one place. | Metrolist in Gearslip's player. |
+| ![A new message card over Vela Maps](docs/screenshots/message.png) | ![Synced lyrics beside the player, lit up to the word being sung](docs/screenshots/lyrics.png) |
+| A new message, read aloud at a tap, over the map. | Lyrics light up word by word as the song plays. |
 | ![The voice assistant listening over Vela Maps](docs/screenshots/assistant.png) | ![Three routes to a coffee shop in Vela Maps, each with its time and distance](docs/screenshots/places.png) |
-| Ask for a place, a song, or an app. | Pick a route to coffee nearby. Each one shows its time and distance. |
+| Ask for a place, a song, or an app. | Pick a route. Each one shows its time and distance. |
+| ![DuckDuckGo open in Gearslip's web browser](docs/screenshots/web.png) | |
+| Browse the web while parked. | |
 
 ## Features
 
-- **Phone calls.** Dial from a keypad, or search your contacts, then confirm before the
-  call goes out. When a call comes in, answer or decline it on the car screen. During a
-  call, the nav bar shows who you're talking to, and you mute or hang up from there.
-- **Navigation.** Gearslip hosts real Car App Library map apps on the car screen.
-  Organic Maps, Vela, OsmAnd, Flitsmeister, MAPS.ME, and MapQuest work today. While you
-  navigate, a big turn card on the left shows the arrow, the distance, and your lane, and
-  the map keeps the right side.
-- **Music.** Browse, play, and queue tracks from a car-enabled media app, with a Now
-  Playing view, an Up Next queue, and lyrics. Type a search, and apps that accept one
-  play the best match.
-- **The web.** A browser with an address bar, back and forward, and its own on-screen
-  keyboard, for anything that doesn't ship a car interface of its own.
-- **Weather and the day ahead.** A dashboard screen shows the week's calendar next to
-  the current and coming weather.
-- **Voice.** Tap the mic, or press the talk button on the wheel, and say "navigate to the
-  nearest gas station", "play Daft Punk", or "call Mom". Say "help" for the full list.
-  Speech turns into text on the phone, and nothing you say leaves it.
-- **Messages.** New messages appear as a small card on the car screen. Gearslip reads
-  each one aloud, and you reply by voice or with a quick reply. Music pauses while
-  Gearslip speaks or listens. Speech runs on the phone, so it needs no Google account.
-- **Notifications.** Only messages, missed calls, alarms, and reminders interrupt you.
-  The rest wait on the dashboard.
-- **Your apps, your order.** The launcher groups apps by kind: phone, maps, music,
-  messaging, and the rest. Press and hold an app to move it.
-- **Car controls.** Steering wheel buttons, control knobs, and D-pads all work.
-- **Your phone's colors.** The car screen and the phone app take their colors from your
-  phone's Material You palette, and every card and button matches.
-- **Themes.** Choose flat buttons or skeuomorphic ones that look like real keys.
-- **Settings on the phone.** The car's settings sit on the phone's home screen too, so you
-  can set things up before you drive. A change on either screen shows on both.
+- **Navigation.** Gearslip hosts real map apps on the car screen. While you navigate, a big
+  turn card shows the arrow, the distance, and your lane, and the map keeps the rest.
+- **Music.** Browse, play, and queue from any car-ready media app. Type a search, and apps
+  that accept one play the best match.
+- **Phone calls.** During a call, the nav bar shows who you're talking to, and you mute or
+  hang up from there.
+- **Messages and notifications.** Only messages, missed calls, alarms, and reminders
+  interrupt you. The rest wait on the dashboard. Music pauses while Gearslip speaks or
+  listens.
+- **Voice.** Tap the mic or press the talk button on the wheel. Say "help" for the full list.
+- **The web.** A browser with an address bar, back and forward, and its own keyboard.
+- **Weather and the day ahead.** A dashboard shows the week's calendar beside the weather.
+- **Your apps, your order.** Apps group by kind. Press and hold one to move it, and hide
+  the ones you don't use from the Apps card on the phone.
+- **Your look.** The car screen takes your phone's Material You colors. Choose flat
+  buttons or ones that look like real keys, and make text bigger on small screens.
+- **Settings on the phone.** Set things up before you drive. A change on either screen
+  shows on both.
 
-## Status
+## Install
 
-- **Wired or wireless.** Plug the phone into the car's USB port, or, in a car with wireless
-  Android Auto, tap Connect wirelessly and pick the car. Pair the phone with the car over
-  Bluetooth first. After the first wireless drive, Android asks once whether Gearslip may
-  watch for that car; from then on, Gearslip connects whenever the car's Bluetooth does.
-- **Setup walks you through it.** First launch asks for the Android Auto certificate,
-  then one permission at a time, each with a plain reason and an Allow or Skip. A help
-  screen inside the car answers anything setup didn't cover.
-- **Templated apps work.** Gearslip renders the Car App Library's templates on the car
-  screen, and it draws its own keyboard for search, sign-in, and text fields. It has been
-  tested against several real navigation and media apps.
-- **Gearslip works with [LIVI](https://github.com/f-io/LIVI),** the open-source head unit
-  used in homemade car dashboards.
-- **Some apps refuse Gearslip.** Spotify, Waze, and Google Messages use a version of
-  Google's car library that accepts only Android Auto itself. Spotify still plays through
-  Gearslip's own player. TIDAL lets only approved apps browse its library.
-- **Calls use the car's Bluetooth,** as they do in Android Auto. Pair the phone with the
-  car to hear calls through its speakers.
-- **Music reaches the car over Bluetooth or USB.** Setup asks which. Bluetooth is the
-  default: Android never asks for permission, and your map app's voice reaches the car
-  too. USB sounds a little clearer, with no delay, but each drive Android asks you to
-  share your screen, which lets Gearslip send the sound. Gearslip never reads the screen; capturing playback is
-  the only way an ordinary app can pass another app's audio along.
-- **Gearslip needs no adb, root, or Shizuku.** Every feature relies on an ordinary
-  Android permission or an on-device consent dialog. For USB audio, setup offers two
-  optional adb commands: one removes the audio dialog for good, and the other keeps
-  notifications visible while audio plays.
-- **Updates come from GitHub.** Once a day, Gearslip checks this repository's latest
-  release. When a new version is out, it downloads the APK, checks it against GitHub's
-  SHA-256, and installs it through Android's own installer. Turn off automatic checks in
-  Settings.
+1. Install Gearslip from [the releases page](https://github.com/twinksoftware/Gearslip/releases)
+   or through Obtainium.
+2. Open it. Setup asks where your Android Auto certificate comes from, then for one
+   permission at a time, each with a plain reason. A help screen in the car answers the rest.
+3. Plug the phone into the car's USB port. In a car with wireless Android Auto, pair the
+   phone with the car over Bluetooth, then tap Connect wirelessly and pick the car.
 
-## Verify your download
+After the first wireless drive, Android asks once whether Gearslip may watch for that car.
+From then on, Gearslip connects whenever the car's Bluetooth does.
+
+> [!NOTE]
+> On GrapheneOS, make sure **USB-C port control** isn't set to **Charging-only**. That
+> setting blocks USB data, so the car never sees the phone, even with a data cable.
+
+Gearslip updates itself from this repository. Once a day it checks the latest release,
+downloads the APK, checks it against GitHub's SHA-256, and installs it through Android's
+own installer. Turn off automatic checks in Settings.
+
+### Verify your download
 
 Check that your copy of Gearslip is genuine with
 [AppVerifier](https://github.com/soupslurpr/AppVerifier): share this block to it, or compare it
@@ -115,6 +101,24 @@ app.seb3thehacker.gearslip
 4C:C5:6E:BD:D1:3A:54:D2:60:EC:A9:B7:E2:B2:AE:6B:30:E2:F2:25:BF:DA:8F:50:8F:07:09:ED:F0:84:94:8B
 ```
 
+## Good to know
+
+- **Music reaches the car over Bluetooth or through Gearslip.** Setup asks which.
+  Bluetooth is the default. Android never asks for permission, and your map app's voice
+  reaches the car too. Through Gearslip, the sound travels over the car connection, cable
+  or wireless. It sounds a little clearer, with no delay, but each drive Android asks you
+  to share your screen, which lets Gearslip send the sound. Gearslip never reads the
+  screen. Capturing playback is the only way an ordinary app can pass another app's audio
+  along.
+- **Gearslip needs no adb, root, or Shizuku.** Every feature relies on an ordinary
+  Android permission or an on-device consent dialog. For audio through Gearslip, setup
+  offers two optional adb commands. One removes the audio dialog for good, and the other
+  keeps notifications visible while audio plays.
+- **Apps without a car screen** can still reach the car through a separate screen-sharing
+  mode.
+- **Gearslip works with [LIVI](https://github.com/f-io/LIVI),** the open-source head unit
+  used in homemade car dashboards.
+
 ## Usage notes
 
 Gearslip can send short notes that show which cars it works in. They stay off unless you
@@ -126,9 +130,9 @@ turn them on, in setup or in Settings.
   those boxes cover: the Android version and whether the phone runs GrapheneOS, the phone
   model, whether a car connected that day, and each car's head unit, model, year, screen
   size, and connection result, with whether that drive used the cable or wireless and
-  whether music went over USB or Bluetooth. If you tick it, how each drive went: how far
-  the connection got, how long it lasted, and how it ended. Settings shows the exact note. Untick a phone detail, and
-  the server drops the copy it kept.
+  whether music went through Gearslip or over Bluetooth. If you tick it, how each drive
+  went: how far the connection got, how long it lasted, and how it ended. Settings shows
+  the exact note. Untick a phone detail, and the server drops the copy it kept.
 - **What they leave out.** Your name, accounts, location, contacts, messages, and
   anything you type or play.
 - **How phones are counted.** A random number counts each phone once. The server keeps
@@ -138,6 +142,19 @@ turn them on, in setup or in Settings.
 
 Turn the notes off, and they stop at once.
 
+## Help out
+
+Bug reports from real cars help most, and pull requests are welcome.
+[CONTRIBUTING.md](CONTRIBUTING.md) explains what to put in a report, which branch to work
+on, and the one-time agreement you sign before your first pull request merges.
+
+To translate Gearslip into your language, join
+[Gearslip on Weblate](https://hosted.weblate.org/engage/gearslip/). No coding needed.
+Translations go through Weblate only, since it holds its own copy of every language and
+changes made in git collide with it.
+
+[![Translation status by language](https://hosted.weblate.org/widget/gearslip/app/multi-auto.svg)](https://hosted.weblate.org/engage/gearslip/)
+
 ## How Gearslip is made
 
 Gearslip is my beloved child. I decide what it does and how it looks, and Claude writes nearly
@@ -147,12 +164,6 @@ open-source head unit software. I watch the phone's temperature too, so a new fe
 cook it. Then I beg my friends to try it in their cars, so it works in as many makes, models,
 and years as possible. If something breaks, that's on me, so please open an issue.
 
-## Contributing
-
-Bug reports from real cars help most, and pull requests are welcome.
-[CONTRIBUTING.md](CONTRIBUTING.md) explains what to put in a report, which branch to work
-on, and the one-time agreement you sign before your first pull request merges.
-
 ## Building
 
 ```

gearslip/build.gradle.kts

@@ -38,9 +38,9 @@ android {
         applicationId = "app.seb3thehacker.gearslip"
         minSdk = 31
         targetSdk = 37
-        versionCode = 12
+        versionCode = 15
         // -PgearslipVersionName=0.1.99-test makes a build that thinks it's older, to try the updater.
-        versionName = project.findProperty("gearslipVersionName")?.toString() ?: "0.3.12-alpha"
+        versionName = project.findProperty("gearslipVersionName")?.toString() ?: "0.3.40-alpha"
         manifestPlaceholders["appLabel"] = "Gearslip"
         // Where opted-in phones send their daily usage note: the stats-worker/ Worker's address,
         // set as gearslipStatsUrl in gradle.properties. Left empty, nothing is ever sent.
@@ -74,6 +74,9 @@ android {
             applicationIdSuffix = ".dev"
             signingConfigs.findByName("release")?.let { signingConfig = it }
             manifestPlaceholders["appLabel"] = "Gearslip Debug"
+            // English (XA) and Arabic (XB) under the phone's languages: stretched, accented and
+            // right-to-left text, which shows what's still hardcoded and what doesn't fit.
+            isPseudoLocalesEnabled = true
             // Shrunk with R8 like a release, so a debug install behaves like what ships (a keep
             // rule missing for release shows up here first). -PnoR8 skips it for a quicker build.
             if (!project.hasProperty("noR8")) {
@@ -88,6 +91,18 @@ android {
         buildConfig = true
     }
 
+    // Lists each language that has a translation in the app's locale config, so Android 13+
+    // offers it under the system's per-app languages. English is the unqualified default
+    // (res/resources.properties).
+    androidResources {
+        generateLocaleConfig = true
+    }
+
+    lint {
+        // Weblate fills languages in a string at a time; the rest fall back to English.
+        disable += "MissingTranslation"
+    }
+
     compileOptions {
         sourceCompatibility = JavaVersion.VERSION_21
         targetCompatibility = JavaVersion.VERSION_21

gearslip/src/main/AndroidManifest.xml

@@ -19,6 +19,8 @@
     <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
     <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE_LOCATION" />
+    <!-- Keeps a wireless start going with the phone locked; see WirelessKeepAlive. -->
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE_CONNECTED_DEVICE" />
 
     <!--
         Wireless Android Auto: Bluetooth reaches the paired car's Android Auto service, which
@@ -126,6 +128,7 @@
         android:roundIcon="@mipmap/ic_launcher"
         android:label="${appLabel}"
         android:supportsRtl="true"
+        android:manageSpaceActivity="app.seb3thehacker.gearslip.ui.ManageSpaceActivity"
         android:theme="@style/Theme.Gearslip">
 
         <provider
@@ -157,11 +160,37 @@
 
         </activity>
 
+        <!--
+          Launcher mode: the car UI as this device's home screen, for a head unit that runs Android
+          or a tablet on the dash. Off until Settings turns it on (LauncherMode), so phones never
+          list Gearslip as a home app.
+        -->
+        <activity
+            android:name=".LauncherActivity"
+            android:enabled="false"
+            android:exported="true"
+            android:launchMode="singleTask"
+            android:excludeFromRecents="true"
+            android:screenOrientation="sensorLandscape"
+            android:configChanges="orientation|screenSize|screenLayout|smallestScreenSize|keyboardHidden|uiMode|density|locale|layoutDirection|fontScale">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.HOME" />
+                <category android:name="android.intent.category.DEFAULT" />
+            </intent-filter>
+        </activity>
+
         <!--
           Answers the car's USB connection on GearslipActivity's behalf. Kept apart from the
           activity so Settings can switch off just this (AppSettings.setGearslipEnabled) and leave
           the head unit to Android Auto, without disabling the screen the switch is on.
         -->
+        <!-- App info › Storage › Manage space: clears lyrics, voice models and logs one at a time. -->
+        <activity
+            android:name=".ui.ManageSpaceActivity"
+            android:exported="true"
+            android:label="Gearslip storage" />
+
         <activity
             android:name=".PermissionActivity"
             android:exported="false"
@@ -197,6 +226,11 @@
             android:exported="false"
             android:foregroundServiceType="location" />
 
+        <service
+            android:name=".wireless.WirelessKeepAlive"
+            android:exported="false"
+            android:foregroundServiceType="connectedDevice" />
+
         <!--
           Holds the capture session that carries a media app's audio to the car. It also claims
           the microphone, so voice replies can hear the driver with the phone locked.

gearslip/src/main/java/app/seb3thehacker/gearslip/Changelog.kt

@@ -10,6 +10,26 @@ object Changelog {
     class Release(val versionCode: Int, val versionName: String, val changes: List<String>)
 
     val releases = listOf(
+        Release(
+            15, "0.3.40-alpha",
+            listOf(
+                "A liked song lights up the whole like button, as shuffle and repeat do.",
+                "Music no longer carries on from the phone after you turn the car off.",
+                "Cars that hold back their screen are asked for it again in a way older cars understand.",
+            ),
+        ),
+        Release(
+            14, "0.3.39-alpha",
+            listOf(
+                "Turns from Google Maps or Waze on the phone show in the nav bar and on the car's cluster.",
+                "Alerts from car apps show here, such as Waze asking whether a hazard is still there.",
+                "Hide apps you don't use in the car from the Apps card on the phone.",
+                "Make text in car apps bigger with Car display density, under Screen.",
+                "Music playing through Gearslip comes back after a call.",
+                "Maps keep your position while the phone is locked.",
+                "Wireless keeps trying until the car answers.",
+            ),
+        ),
         Release(
             9, "0.3.00-alpha",
             listOf(

gearslip/src/main/java/app/seb3thehacker/gearslip/ClusterVideo.kt

@@ -0,0 +1,164 @@
+package app.seb3thehacker.gearslip
+
+import android.content.Context
+import android.os.Handler
+import android.os.Looper
+import app.seb3thehacker.gearslip.car.ClusterScreen
+
+/**
+ * Gearslip's picture on the car's instrument-cluster screen: a second video sink, for a car that
+ * offers one, showing the turn card ([ClusterScreen]). The same exchange as the main screen's,
+ * on its own channel, with its own encoder and its own private display:
+ *
+ *   -> CHANNEL_OPEN_REQUEST   <- CHANNEL_OPEN_RESPONSE
+ *   -> Setup { H.264 }        <- Config { status, max_unacked, configuration_indices }
+ *   -> VideoFocusRequest      <- VideoFocusNotification { projected }
+ *   -> Start, CodecConfig, Data...   <- Ack
+ *
+ * No touch: a cluster has none. Experimental, behind [car.CarSettings.clusterVideoEnabled], and
+ * untested in a car: none in the notes has a cluster sink.
+ */
+internal class ClusterVideo(
+    private val context: Context,
+    private val service: ServiceDiscovery.VideoService,
+    private val send: (messageId: Int, body: ByteArray) -> Unit,
+) {
+    private val log = GearslipLog.tagged("CLUSTER")
+    private val main = Handler(Looper.getMainLooper())
+
+    val channelId get() = service.serviceId
+
+    private var configIndex = 0
+    @Volatile private var started = false
+    @Volatile private var running = true
+    @Volatile private var source: VideoSource? = null
+    private var projector: ScreenProjector? = null
+
+    private val ackLock = Object()
+    @Volatile private var inFlight = 0
+    @Volatile private var maxUnacked = 1
+    @Volatile private var lastAckAt = 0L
+    private var frames = 0
+
+    fun onMessage(messageId: Int, body: ByteArray) {
+        when (messageId) {
+            GearslipRunner.MSG_CHANNEL_OPEN_RESPONSE -> {
+                val status = Protobuf.readInt32Field(body, 1) ?: 0
+                log.i("<- ChannelOpenResponse: status=$status")
+                if (status != 0) return
+                send(GearslipRunner.MSG_MEDIA_SETUP, Protobuf.varintField(1, GearslipRunner.CODEC_H264_BP.toLong()))
+                log.i("-> Setup(codec=VIDEO_H264_BP)")
+            }
+
+            GearslipRunner.MSG_MEDIA_CONFIG -> {
+                val fields = Wire.fields(body)
+                Wire.varint(fields, 2)?.toInt()?.let { maxUnacked = maxOf(1, it) }
+                val offered = fields.filter { it.number == 3 && it.wireType == 0 }.map { it.varint.toInt() }
+                // The cluster gets the smallest picture it offers: a turn card needs no more.
+                configIndex = offered.minByOrNull { service.configs.getOrNull(it)?.pixelCount() ?: Int.MAX_VALUE } ?: 0
+                log.i("<- Config status=${Wire.varint(fields, 1)} max_unacked=$maxUnacked offered=$offered - using $configIndex")
+                val focus = Protobuf.varintField(2, GearslipRunner.VIDEO_FOCUS_PROJECTED.toLong()) + Protobuf.varintField(3, 1L)
+                send(GearslipRunner.MSG_VIDEO_FOCUS_REQUEST, focus)
+                log.i("-> VideoFocusRequest(mode=PROJECTED)")
+            }
+
+            GearslipRunner.MSG_VIDEO_FOCUS_NOTIFICATION -> {
+                val mode = Wire.varint(Wire.fields(body), 1)?.toInt() ?: GearslipRunner.VIDEO_FOCUS_PROJECTED
+                log.i("<- VideoFocusNotification: mode=$mode")
+                val projected = mode == GearslipRunner.VIDEO_FOCUS_PROJECTED || mode == GearslipRunner.VIDEO_FOCUS_PROJECTED_NO_INPUT
+                if (projected && !started) startStream()
+            }
+
+            GearslipRunner.MSG_MEDIA_ACK -> {
+                val acked = Wire.varint(Wire.fields(body), 2)?.toInt() ?: 1
+                synchronized(ackLock) {
+                    inFlight = maxOf(0, inFlight - maxOf(1, acked))
+                    lastAckAt = System.currentTimeMillis()
+                    ackLock.notifyAll()
+                }
+            }
+
+            else -> log.i("<- unhandled message id=$messageId (${body.size} bytes)")
+        }
+    }
+
+    private fun startStream() {
+        val config = service.configs.getOrNull(configIndex) ?: service.configs.firstOrNull() ?: return
+        val (width, height) = config.pixelSize() ?: run {
+            log.w("unsupported cluster resolution ${config.resolutionName}")
+            return
+        }
+        started = true
+        send(
+            GearslipRunner.MSG_MEDIA_START,
+            Protobuf.varintField(1, GearslipRunner.SESSION_ID.toLong()) + Protobuf.varintField(2, configIndex.toLong()),
+        )
+        log.i("-> Start(config=$configIndex -> $config)")
+        lastAckAt = System.currentTimeMillis()
+        val video = VideoSource(
+            width = width,
+            height = height,
+            frameRate = FRAME_RATE,
+            mode = VideoSource.Mode.SURFACE,
+            wireless = true, // a small share of the link: the main screen comes first
+            onCodecConfig = { csd ->
+                send(GearslipRunner.MSG_MEDIA_CODEC_CONFIG, csd)
+                log.i("-> CodecConfig (${csd.size} bytes)")
+            },
+            onFrame = { data, pts, _ -> sendFrame(data, pts) },
+        )
+        source = video
+        runCatching { video.start() }.onFailure {
+            log.e("cluster encoder failed to start", it)
+            return
+        }
+        val surface = video.inputSurface ?: return
+        val density = config.density.takeIf { it > 0 } ?: 160
+        main.post {
+            if (!running) return@post
+            projector = ScreenProjector(context).also {
+                it.start(surface, width, height, density, name = "gearslip-cluster") {
+                    // The margins the car crops off are kept clear, as on the main screen.
+                    ClusterScreen(config.widthMargin, config.heightMargin)
+                }
+            }
+        }
+    }
+
+    /** As on the main screen: wait for the car's acks rather than drop a frame. */
+    private fun sendFrame(data: ByteArray, presentationTimeUs: Long) {
+        synchronized(ackLock) {
+            while (running && inFlight >= maxUnacked) {
+                val since = System.currentTimeMillis() - lastAckAt
+                if (since > GearslipRunner.ACK_STALL_MS) {
+                    inFlight = 0
+                    lastAckAt = System.currentTimeMillis()
+                    break
+                }
+                ackLock.wait(GearslipRunner.ACK_STALL_MS - since + 1)
+            }
+        }
+        if (!running) return
+        val timestamp = ByteArray(8)
+        for (i in 0 until 8) timestamp[i] = ((presentationTimeUs shr ((7 - i) * 8)) and 0xFF).toByte()
+        synchronized(ackLock) { inFlight++ }
+        runCatching { send(GearslipRunner.MSG_MEDIA_DATA, timestamp + data) }.onFailure { running = false }
+        if (++frames <= 2) log.i("-> Data frame #$frames (${data.size} bytes)")
+    }
+
+    fun stop() {
+        running = false
+        synchronized(ackLock) { ackLock.notifyAll() }
+        main.post {
+            projector?.stop()
+            projector = null
+        }
+        source?.stop()
+        source = null
+    }
+
+    private companion object {
+        // A turn card changes a few times a minute; the encoder repeats the last frame between.
+        const val FRAME_RATE = 15
+    }
+}

gearslip/src/main/java/app/seb3thehacker/gearslip/GearslipActivity.kt

@@ -118,6 +118,10 @@ class GearslipActivity : ComponentActivity(), Projection {
 
     /** Android's one-time "Allow" for a car to connect by itself; see [WirelessAuto]. */
     private var approvingCar: String? = null
+
+    /** Whether the phone showed Gearslip when the car's intent arrived; see [stepAside]. */
+    private var shownOnPhone = false
+    private var stepAsideOnVideo = false
     private val carApproval = registerForActivityResult(
         androidx.activity.result.contract.ActivityResultContracts.StartIntentSenderForResult(),
     ) { result ->
@@ -223,6 +227,16 @@ class GearslipActivity : ComponentActivity(), Projection {
         }
     }
 
+    override fun onResume() {
+        super.onResume()
+        shownOnPhone = true
+    }
+
+    override fun onStop() {
+        super.onStop()
+        shownOnPhone = false
+    }
+
     override fun onNewIntent(intent: Intent) {
         super.onNewIntent(intent)
         handleIntent(intent)
@@ -296,7 +310,8 @@ class GearslipActivity : ComponentActivity(), Projection {
         val target = surface ?: return
         if (screenProjector != null) return
         val projector = ScreenProjector(this).also { screenProjector = it }
-        projector.start(target, frameWidth, frameHeight, frameDensity) { CarUi() }
+        // The frame's density, not frameDensity: that stays the car's own, for the phone mirror.
+        projector.start(target, frameWidth, frameHeight, CarEnvironment.frame.value.densityDpi) { CarUi() }
     }
 
     /**
@@ -320,7 +335,10 @@ class GearslipActivity : ComponentActivity(), Projection {
     }
 
     private fun handleIntent(intent: Intent?) {
+        // Debug builds only: opens the audio choice for a look, without turning down a real prompt.
+        if (BuildConfig.DEBUG && intent?.getBooleanExtra("show_audio_choice", false) == true) offerBluetooth.value = true
         if (intent?.action == app.seb3thehacker.gearslip.wireless.WirelessAuto.ACTION_CAR_NEARBY) {
+            stepAsideOnVideo = !shownOnPhone
             connectToNearbyCar(intent.getStringExtra(app.seb3thehacker.gearslip.wireless.WirelessAuto.EXTRA_ADDRESS))
             return
         }
@@ -338,6 +356,7 @@ class GearslipActivity : ComponentActivity(), Projection {
             return
         }
         GearslipLog.i("accessory attached by the system - permission is implicit on this path")
+        stepAsideOnVideo = !shownOnPhone
         start(accessory)
     }
 
@@ -399,9 +418,11 @@ class GearslipActivity : ComponentActivity(), Projection {
             identityProvider = { CertProvider.load(this) },
             projection = this,
             vehicleProfileFor = { info -> VehicleProfiles.find(VehicleProfiles.load(this), info) },
+            phoneIcons = { PhoneIcons.pngs(this) },
         )
         this.runner = runner
         worker = Thread { runner.run() }.apply { name = "gearslip"; start() }
+        holdLocation()
     }
 
     /** A wireless session: the same runner, on the socket [WirelessLink] opened to the car. */
@@ -421,9 +442,25 @@ class GearslipActivity : ComponentActivity(), Projection {
             projection = this,
             vehicleProfileFor = { info -> VehicleProfiles.find(VehicleProfiles.load(this), info) },
             wireless = true,
+            phoneIcons = { PhoneIcons.pngs(this) },
         )
         this.runner = runner
         worker = Thread { runner.run() }.apply { name = "gearslip"; start() }
+        holdLocation()
+    }
+
+    /** Whether this session holds [app.seb3thehacker.gearslip.host.LocationKeepAlive]. */
+    private var holdingLocation = false
+
+    /**
+     * Android lets a foreground service started from the background use location only in the few
+     * seconds after one of the app's screens opens. The car just opened this one, so take the
+     * location service now: a map bound later, with the phone already locked, got no position.
+     */
+    private fun holdLocation() {
+        if (holdingLocation) return
+        holdingLocation = true
+        app.seb3thehacker.gearslip.host.LocationKeepAlive.acquire(this) {}
     }
 
     private fun describe(accessory: UsbAccessory) {
@@ -443,10 +480,27 @@ class GearslipActivity : ComponentActivity(), Projection {
         wirelessSocket = null
         if (stopWireless) app.seb3thehacker.gearslip.wireless.WirelessLink.stop(this)
         runner = null
+        if (holdingLocation) {
+            holdingLocation = false
+            app.seb3thehacker.gearslip.host.LocationKeepAlive.release(this)
+        }
     }
 
     // --- Projection ---------------------------------------------------------------------
 
+    /**
+     * The car opens Gearslip on the phone, since Android hands a USB car only to an activity and
+     * auto-connect has to start one too. Once the car's screen is up, go back to whatever the
+     * phone showed, as Home would; the session carries on as it does with the phone locked. A
+     * question for the driver keeps Gearslip in front, and so does the phone already showing it.
+     */
+    private fun stepAside() {
+        stepAsideOnVideo = false
+        if (offerBluetooth.value || micBlockedNotice.value || approvingCar != null) return
+        GearslipLog.i("the car's screen is up - moving Gearslip off the phone's screen")
+        moveTaskToBack(true)
+    }
+
     override fun onSurfaceReady(surface: Surface, width: Int, height: Int, densityDpi: Int) {
         runOnUiThread {
             this.surface = surface
@@ -456,6 +510,7 @@ class GearslipActivity : ComponentActivity(), Projection {
             CarEnvironment.setDisplay(width, height, densityDpi)
             CarEnvironment.start(this)
             showCarUi()
+            if (stepAsideOnVideo) stepAside()
             app.seb3thehacker.gearslip.car.CarKeys.focusSink = { code, down ->
                 runOnUiThread { screenProjector?.dispatchKey(code, down) }
             }
@@ -472,6 +527,10 @@ class GearslipActivity : ComponentActivity(), Projection {
         }
     }
 
+    override fun onStill() {
+        screenProjector?.redraw()
+    }
+
     override fun onProjectionStopped() {
         // Before the car UI goes, while the media connection is still up.
         app.seb3thehacker.gearslip.car.CarServices.pausePhoneMedia()

gearslip/src/main/java/app/seb3thehacker/gearslip/GearslipLog.kt

@@ -47,6 +47,8 @@ object GearslipLog {
     val version: StateFlow<Int> = liveVersion
 
     fun init(context: Context) {
+        // The phone app and the launcher both start here; one file per process.
+        if (file != null) return
         val dir = context.getExternalFilesDir(null) ?: return
         val name = SimpleDateFormat("yyyyMMdd-HHmmss", Locale.US).format(Date())
         file = File(dir, "gearslip-$name.log")
@@ -54,9 +56,65 @@ object GearslipLog {
         SessionReport.init(context)
         // One file per launch adds up; the newest are the ones anyone asks for.
         io.execute { logFiles(dir).drop(KEEP_FILES).forEach { it.delete() } }
+        lastExit(context, dir)
     }
 
     private const val KEEP_FILES = 30
+    private const val KEY_EXIT_SEEN = "log_exit_seen"
+
+    /**
+     * Why Android ended the last run, when the crash handler can't have seen it: a native crash,
+     * a freeze (ANR), or the memory killer. Written here and onto the end of that run's own log,
+     * which is the one a driver shares after a drive that went wrong.
+     */
+    private fun lastExit(context: Context, dir: File) {
+        val am = context.getSystemService(android.app.ActivityManager::class.java) ?: return
+        val seen = AppSettings.getString(context, KEY_EXIT_SEEN, "0").toLongOrNull() ?: 0L
+        val exits = runCatching { am.getHistoricalProcessExitReasons(null, 0, 5) }.getOrDefault(emptyList())
+            .filter { it.timestamp > seen }
+        exits.firstOrNull()?.let { AppSettings.putString(context, KEY_EXIT_SEEN, it.timestamp.toString()) }
+        val parse = SimpleDateFormat("yyyyMMdd-HHmmss", Locale.US)
+        for (exit in exits.reversed()) {
+            val why = EXIT_REASONS[exit.reason] ?: continue
+            val at = SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.US).format(Date(exit.timestamp))
+            val detail = buildString {
+                append("$at, $why")
+                exit.description?.takeIf { it.isNotBlank() }?.let { append(" ($it)") }
+                append(", memory ${exit.pss / 1024} MB")
+                if (exit.reason == android.app.ApplicationExitInfo.REASON_ANR) {
+                    anrMainThread(exit)?.let { append("\n").append(it) }
+                }
+            }
+            w("Android ended an earlier run at $detail")
+            // The run that died: the newest log that started before it ended.
+            val run = logFiles(dir).filter { it != file }.firstOrNull { f ->
+                val started = runCatching { parse.parse(f.name.removePrefix("gearslip-").removeSuffix(".log")) }.getOrNull()
+                started != null && started.time <= exit.timestamp
+            } ?: continue
+            io.execute { runCatching { run.appendText("--- $EXIT_MARK $detail\n") } }
+        }
+    }
+
+    /** The main thread's stack from an ANR trace: what Gearslip was stuck doing. */
+    private fun anrMainThread(exit: android.app.ApplicationExitInfo): String? = runCatching {
+        exit.traceInputStream?.bufferedReader()?.useLines { lines ->
+            lines.dropWhile { !it.startsWith("\"main\"") }.take(ANR_LINES).joinToString("\n")
+        }?.takeIf { it.isNotBlank() }
+    }.getOrNull()
+
+    private const val ANR_LINES = 25
+    private const val EXIT_MARK = "Android ended this run:"
+
+    /** Exit reasons worth a line; leaving, updating and Java crashes (already logged) aren't. */
+    private val EXIT_REASONS = mapOf(
+        android.app.ApplicationExitInfo.REASON_CRASH_NATIVE to "a native crash",
+        android.app.ApplicationExitInfo.REASON_ANR to "the app stopped responding (ANR)",
+        android.app.ApplicationExitInfo.REASON_LOW_MEMORY to "the phone ran low on memory",
+        android.app.ApplicationExitInfo.REASON_EXCESSIVE_RESOURCE_USAGE to "it used too much of the phone's resources",
+        android.app.ApplicationExitInfo.REASON_INITIALIZATION_FAILURE to "it failed to start",
+        android.app.ApplicationExitInfo.REASON_SIGNALED to "the system killed it",
+        android.app.ApplicationExitInfo.REASON_DEPENDENCY_DIED to "something it depends on died",
+    )
 
     private fun logFiles(dir: File): List<File> =
         dir.listFiles { f -> f.isFile && f.name.startsWith("gearslip-") && f.name.endsWith(".log") }
@@ -77,7 +135,7 @@ object GearslipLog {
             PastLog(
                 file = f,
                 started = runCatching { parse.parse(f.name.removePrefix("gearslip-").removeSuffix(".log")) }.getOrNull(),
-                crashed = "FATAL uncaught" in text,
+                crashed = "FATAL uncaught" in text || EXIT_MARK in text,
                 car = Regex("""car="([^"]+)"""").findAll(text).lastOrNull()?.groupValues?.get(1),
             )
         }
@@ -173,7 +231,11 @@ object GearslipLog {
      * Records an uncaught exception in the log file before the process dies, then lets the
      * system's own handler run. Without it the file ends mid-sentence and the reason is lost.
      */
+    @Volatile private var crashHandlerInstalled = false
+
     fun installCrashHandler() {
+        if (crashHandlerInstalled) return
+        crashHandlerInstalled = true
         val previous = Thread.getDefaultUncaughtExceptionHandler()
         Thread.setDefaultUncaughtExceptionHandler { thread, throwable ->
             runCatching {

gearslip/src/main/java/app/seb3thehacker/gearslip/GearslipRunner.kt

@@ -48,6 +48,8 @@ class GearslipRunner(
     private val vehicleProfileFor: (ServiceDiscovery.HeadUnitInfo) -> VehicleProfile? = { null },
     /** Over Wi-Fi rather than USB: the video is sent smaller so the link keeps up. */
     private val wireless: Boolean = false,
+    /** Gearslip's icon as 32, 64 and 128 px PNGs, for the car's phone tile. See [PhoneIcons]. */
+    private val phoneIcons: () -> List<ByteArray> = { emptyList() },
 ) {
     private val log = GearslipLog.tagged("PROTO")
 
@@ -56,6 +58,8 @@ class GearslipRunner(
     private val parser = Frames.Parser()
     private val assembler = Frames.Assembler()
     private lateinit var identityTask: FutureTask<PhoneTls>
+    /** The certificate in use, to tell a wrong date on the car from a certificate that's really out of date. */
+    @Volatile private var phoneCert: java.security.cert.X509Certificate? = null
 
     /** Sends every message, in order, so no other thread ever blocks on the USB link. See [send]. */
     private val writer = java.util.concurrent.Executors.newSingleThreadExecutor {
@@ -96,11 +100,15 @@ class GearslipRunner(
     @Volatile private var inputKeycodes: List<Int> = emptyList()
     @Volatile private var sensorChannelId: Int = -1
     @Volatile private var mediaStatus: CarMediaStatus? = null
+    @Volatile private var phoneStatus: app.seb3thehacker.gearslip.call.CarPhoneStatus? = null
+    @Volatile private var clusterVideo: ClusterVideo? = null
     @Volatile private var clusterNav: ClusterNav? = null
     private var sensorTypes: List<Int> = emptyList()
     @Volatile private var audioLink: AudioLink? = null
     @Volatile private var guidanceLink: AudioLink? = null
     @Volatile private var vendorChannelId = -1
+    /** The car's Wi-Fi projection channel, opened in GM cars only (see [startVendorChannel]); -1 when closed. */
+    @Volatile private var wifiChannelId = -1
     private var audioMessagesSeen = 0
     private var touchWidth = 0
     private var touchHeight = 0
@@ -126,6 +134,7 @@ class GearslipRunner(
         identityTask = FutureTask {
             val identity = identityProvider()
             val cert = identity.certificate
+            phoneCert = cert
             log.i("phone certificate source: ${identity.source}")
             SessionReport.certificate(identity.source.toString(), cert.issuerX500Principal.toString())
             log.i("  subject = ${cert.subjectX500Principal}")
@@ -156,7 +165,8 @@ class GearslipRunner(
         } catch (t: Throwable) {
             if (stopped) return
             log.e("transport failed in state $state", t)
-            SessionReport.fail(SessionReport.Category.USB, "transport failed", t, state.name)
+            val link = if (wireless) SessionReport.Category.WIFI else SessionReport.Category.USB
+            SessionReport.fail(link, "transport failed", t, state.name)
             reportDisconnect()
         } finally {
             running = false
@@ -184,12 +194,17 @@ class GearslipRunner(
         guidanceLink?.close()
         guidanceLink = null
         CarSensors.clear()
+        app.seb3thehacker.gearslip.car.CarData.clear()
         CarMic.current = null
         CarBluetooth.onCarDisconnected()
         BluetoothAudioCheck.onCarDisconnected()
         LocationCheck.onCarDisconnected()
         mediaStatus?.stop()
         mediaStatus = null
+        phoneStatus?.stop()
+        phoneStatus = null
+        clusterVideo?.stop()
+        clusterVideo = null
         clusterNav?.stop()
         clusterNav = null
         lastSensorNight = null
@@ -237,12 +252,18 @@ class GearslipRunner(
                 clusterNav?.onMessage(messageId, body)
             } else if (frame.channel == mediaStatus?.channelId) {
                 mediaStatus?.onMessage(messageId, body)
+            } else if (frame.channel == phoneStatus?.channelId) {
+                phoneStatus?.onMessage(messageId, body)
+            } else if (frame.channel == clusterVideo?.channelId) {
+                clusterVideo?.onMessage(messageId, body)
             } else if (frame.channel == guidanceLink?.channelId) {
                 guidanceLink?.onMessage(messageId, body)
             } else if (frame.channel == CarBluetooth.channelId) {
                 CarBluetooth.onMessage(messageId, body)
             } else if (frame.channel == vendorChannelId) {
                 onVendorMessage(messageId, body)
+            } else if (frame.channel == wifiChannelId) {
+                onWifiProjectionMessage(messageId, body)
             } else if (frame.channel == CarMic.current?.channelId) {
                 CarMic.current?.onMessage(messageId, body)
             } else if (frame.channel == audioLink?.channelId) {
@@ -272,6 +293,7 @@ class GearslipRunner(
             MSG_AUTH_COMPLETE -> onAuthComplete(body)
             MSG_SERVICE_DISCOVERY_RESPONSE -> onServiceDiscoveryResponse(body)
             MSG_PING_REQUEST -> onPingRequest(body)
+            MSG_PING_RESPONSE -> onPingResponse()
             MSG_BYEBYE_REQUEST -> onByeByeRequest(body)
             MSG_UNEXPECTED_MESSAGE, MSG_FRAMING_ERROR -> onProtocolError(messageId)
             AudioLink.MSG_FOCUS_RESPONSE -> {
@@ -393,8 +415,7 @@ class GearslipRunner(
             }
             -2, -23, -24 -> {
                 val reason = when (status) {
-                    -23 -> "The phone's certificate is not valid yet."
-                    -24 -> "The phone's certificate has expired."
+                    -23, -24 -> certificateDates(status)
                     else -> "The head unit refused the phone's certificate."
                 }
                 SessionReport.fail(SessionReport.Category.CERTIFICATE, "AuthComplete status $status", state.name, "auth $status")
@@ -435,11 +456,44 @@ class GearslipRunner(
         if (authenticationFailed) running = false
     }
 
+    /**
+     * The car checks the certificate's dates against its own clock. When they're fine by the
+     * phone's clock, the car's clock is the one that's wrong, which a flat battery or a car
+     * that never got the time from GPS leaves behind.
+     */
+    private fun certificateDates(status: Int): String {
+        val cert = phoneCert ?: return if (status == -23) "The phone's certificate is not valid yet." else "The phone's certificate has expired."
+        val now = java.util.Date()
+        val day = java.text.DateFormat.getDateInstance(java.text.DateFormat.LONG)
+        return when {
+            status == -23 && now.before(cert.notBefore) ->
+                "The phone's certificate is not valid until ${day.format(cert.notBefore)}."
+            status == -24 && now.after(cert.notAfter) ->
+                "The phone's certificate expired on ${day.format(cert.notAfter)}. Get a new one under Certificate in Settings."
+            else -> {
+                val side = if (status == -23) "behind" else "ahead"
+                log.w("the certificate's dates are fine by the phone's clock, so the car's clock is $side")
+                "The car's clock looks wrong: the certificate is valid today, but the car thinks it " +
+                    (if (status == -23) "isn't valid yet" else "has expired") +
+                    ". Set the car's date and time, then connect again."
+            }
+        }
+    }
+
+    /**
+     * What a real phone sends here: its icon at three sizes (fields 1 to 3), a label, its model,
+     * and a session ID that's new each connection (field 6). A 2017 Hyundai on protocol 1.0
+     * never answered the request when it had only the label and model (issue #47).
+     */
     private fun sendServiceDiscoveryRequest() {
-        val body = Protobuf.stringField(4, "Gearslip") + // label_text
-            Protobuf.stringField(5, Build.MODEL)        // device_name
+        val icons = runCatching(phoneIcons).getOrDefault(emptyList())
+        var body = ByteArray(0)
+        icons.take(3).forEachIndexed { i, png -> body += Protobuf.bytesField(i + 1, png) } // small, medium, large icon
+        body += Protobuf.stringField(4, "Gearslip") + // label_text
+            Protobuf.stringField(5, Build.MODEL) + // device_name
+            Protobuf.bytesField(6, Protobuf.stringField(1, java.util.UUID.randomUUID().toString())) // session ID
         send(MSG_SERVICE_DISCOVERY_REQUEST, body, encrypted = true)
-        log.i("-> ServiceDiscoveryRequest (encrypted)")
+        log.i("-> ServiceDiscoveryRequest (encrypted, ${icons.size} icons, ${body.size} bytes)")
     }
 
     private fun onServiceDiscoveryResponse(body: ByteArray) {
@@ -458,10 +512,12 @@ class GearslipRunner(
                 "possible against THIS unit - portability to newer units is still unproven.",
         )
         state = State.DONE
+        startPhonePings()
         val info = ServiceDiscovery.findHeadUnitInfo(body)
         log.i("head unit: $info")
         SessionReport.headUnit(info.toString())
         SessionReport.headUnitInfo = info
+        app.seb3thehacker.gearslip.car.CarData.onModel(info.carModel, info.carYear)
         vehicleProfile = runCatching { vehicleProfileFor(info) }.getOrNull()
         val profile = vehicleProfile
         SessionReport.profile(profile?.name)
@@ -512,6 +568,8 @@ class GearslipRunner(
         startSensorChannel(serviceDiscoveryResponse)
         startMicChannel(serviceDiscoveryResponse)
         startMediaStatusChannel(serviceDiscoveryResponse)
+        startPhoneStatusChannel(serviceDiscoveryResponse)
+        startClusterVideo(serviceDiscoveryResponse)
         startClusterNavChannel(serviceDiscoveryResponse)
         startBluetooth(serviceDiscoveryResponse)
         startVendorChannel(serviceDiscoveryResponse)
@@ -563,6 +621,8 @@ class GearslipRunner(
             // The driver picked the radio or another source on the car: pause the phone's music
             // as Android Auto does, instead of letting it play on to no one.
             onTakenBack = { CarServices.pausePhoneMedia("the car switched to another source") },
+            onPausedForNow = { CarServices.pausePhoneMediaForNow() },
+            onGivenBack = { CarServices.resumePhoneMedia() },
         )
         if (CarSettings.pipeAudio.value) {
             openChannel(media.serviceId)
@@ -592,7 +652,9 @@ class GearslipRunner(
             tag = "guidance",
             sessionId = GUIDANCE_SESSION_ID,
             asksFocus = false,
-            onReady = { DirectionsVoice.attach(it) { audioLink?.streaming == true } },
+            onReady = {
+                DirectionsVoice.attach(it, musicIsOurs = { audioLink?.streaming == true }, musicSink = { audioLink?.takeIf { link -> link.isReady } })
+            },
             onClose = { DirectionsVoice.detach(it) },
         )
         openChannel(guidance.serviceId)
@@ -628,6 +690,32 @@ class GearslipRunner(
         openChannel(channel)
     }
 
+    /** The turn card on the instrument cluster, for a car with a cluster screen: experimental, off by default. */
+    private fun startClusterVideo(serviceDiscoveryResponse: ByteArray) {
+        val sink = ServiceDiscovery.findClusterVideoService(serviceDiscoveryResponse) ?: return
+        log.i("cluster video sink: channel=${sink.serviceId} display=${sink.displayId} type=${sink.displayType}")
+        if (!CarSettings.experimentalFeaturesEnabled.value || !CarSettings.clusterVideoEnabled.value) {
+            log.i("cluster screen is off in the car's Settings (experimental) - leaving that sink alone")
+            return
+        }
+        val context = app.seb3thehacker.gearslip.car.CarEnvironment.appContext ?: return
+        clusterVideo = ClusterVideo(context, sink) { id, body -> send(id, body, encrypted = true, channel = sink.serviceId) }
+        openChannel(sink.serviceId)
+    }
+
+    /** Calls, for the car's own screens: the cluster, the steering wheel display. */
+    private fun startPhoneStatusChannel(serviceDiscoveryResponse: ByteArray) {
+        val channel = ServiceDiscovery.findPhoneStatusChannel(serviceDiscoveryResponse) ?: run {
+            log.i("no phone status channel - the car's own screens won't show calls")
+            return
+        }
+        log.i("phone status channel: $channel")
+        phoneStatus = app.seb3thehacker.gearslip.call.CarPhoneStatus(channel) { id, body ->
+            send(id, body, encrypted = true, channel = channel)
+        }
+        openChannel(channel)
+    }
+
     /** Bluetooth pairing, for calls: the channel only opens if the driver asks to pair. */
     /**
      * GM's own channel ("com.gm.vip"), opened in GM cars only. Issue #18: a 2021 Bolt ends every
@@ -642,6 +730,23 @@ class GearslipRunner(
         vendorChannelId = gm.serviceId
         log.i("-> ChannelOpenRequest on GM's channel ${gm.serviceId}")
         openChannel(gm.serviceId)
+        // Opening GM's channel and pinging the car didn't stop the Bolt hanging up, so a GM car
+        // also gets the two channels Gearslip had never opened: Bluetooth and Wi-Fi projection.
+        // Only what arrives on them is logged, by message id and size, until one turns out to matter.
+        CarBluetooth.announce("a GM car, issue #18")
+        ServiceDiscovery.findWifiProjectionService(serviceDiscoveryResponse)?.let { channel ->
+            wifiChannelId = channel
+            log.i("-> ChannelOpenRequest on the Wi-Fi projection channel $channel (a GM car, issue #18)")
+            openChannel(channel)
+        }
+    }
+
+    private fun onWifiProjectionMessage(messageId: Int, body: ByteArray) {
+        if (messageId == MSG_CHANNEL_OPEN_RESPONSE) {
+            log.i("<- Wi-Fi projection channel open: status=${Protobuf.readInt32Field(body, 1) ?: 0}")
+        } else {
+            log.i("<- Wi-Fi projection message id=$messageId (${body.size} bytes)")
+        }
     }
 
     private fun onVendorMessage(messageId: Int, body: ByteArray) {
@@ -766,6 +871,7 @@ class GearslipRunner(
 
             MSG_SENSOR_EVENT_INDICATION -> {
                 CarSensors.onEvent(body)
+                app.seb3thehacker.gearslip.car.CarData.onEvent(body)
                 logSensorEvent(body)
                 onNightSensor(body)
             }
@@ -954,11 +1060,8 @@ class GearslipRunner(
                     "${videoConfigs.getOrNull(selectedConfigIndex ?: -1)?.resolutionName ?: "?"} " +
                         "(head unit offered ${offered.size}), max_unacked=$maxUnacked",
                 )
-                // VideoFocusRequestNotification { mode = 2; reason = 3 }
-                val focus = Protobuf.varintField(2, VIDEO_FOCUS_PROJECTED.toLong()) +
-                    Protobuf.varintField(3, 1L)
-                send(MSG_VIDEO_FOCUS_REQUEST, focus, encrypted = true, channel = videoChannelId)
-                log.i("-> VideoFocusRequest(mode=PROJECTED)")
+                requestProjectedFocus()
+                if (CarAudio.openSink != null) watchForWithheldScreen()
             }
 
             MSG_VIDEO_FOCUS_NOTIFICATION -> {
@@ -1111,6 +1214,7 @@ class GearslipRunner(
             onFrame = { data, presentationTimeUs, keyFrame ->
                 sendVideoFrame(data, presentationTimeUs, keyFrame)
             },
+            onStill = { projection?.onStill() },
         ).also { source ->
             runCatching {
                 source.start()
@@ -1234,6 +1338,49 @@ class GearslipRunner(
         }
     }
 
+    /**
+     * Asks the car for its screen; the answer comes to [onVideoFocus]. [withDisplay] names the
+     * display's channel too, as the request for the car's own screen does (see [requestNativeFocus]):
+     * the field is deprecated, but a car older than that may ignore a request without it.
+     */
+    private fun requestProjectedFocus(withDisplay: Boolean = false) {
+        // VideoFocusRequestNotification { disp_channel_id = 1; mode = 2; reason = 3 }. Reason 1
+        // means "the phone's screen is off", which a 2020 Civic may have taken as a reason to
+        // keep its own screen (issue #43); 0 is UNKNOWN.
+        val display = if (withDisplay) Protobuf.varintField(1, videoChannelId.toLong()) else ByteArray(0)
+        val focus = display + Protobuf.varintField(2, VIDEO_FOCUS_PROJECTED.toLong()) +
+            Protobuf.varintField(3, 0L)
+        send(MSG_VIDEO_FOCUS_REQUEST, focus, encrypted = true, channel = videoChannelId)
+        log.i(if (withDisplay) "-> VideoFocusRequest(display=$videoChannelId, mode=PROJECTED)" else "-> VideoFocusRequest(mode=PROJECTED)")
+    }
+
+    /**
+     * Some older head units keep their own screen until every channel the phone was offered is
+     * open: a 2017 Pilot, a 2020 Civic and a 2024 Mirage (issues #43, #49, #57) never showed
+     * ours with the media channel closed, and the Mirage worked on 0.3.01, which opened it. With
+     * music over Bluetooth that channel waits for the car to switch source, so if the screen
+     * hasn't come a few seconds after asking, open it and ask again. Cars that hand the screen
+     * straight over keep their own source as before.
+     * The 2017 Pilot (protocol 1.0) still kept its screen with the channel open, so the second
+     * request also names the display's channel, as cars of the Pilot's age may need.
+     */
+    private fun watchForWithheldScreen() {
+        Thread({
+            Thread.sleep(WITHHELD_SCREEN_MS)
+            if (!running || videoStarted) return@Thread
+            val open = CarAudio.openSink
+            if (open != null) {
+                log.w("no screen from the car after ${WITHHELD_SCREEN_MS / 1000}s - opening the media channel and asking again")
+                open()
+                // Give the car the channel's open response before it hears the request again.
+                Thread.sleep(1_000)
+            } else {
+                log.w("no screen from the car after ${WITHHELD_SCREEN_MS / 1000}s - asking again")
+            }
+            if (running && !videoStarted) requestProjectedFocus(withDisplay = true)
+        }, "gearslip-focus-fallback").apply { isDaemon = true }.start()
+    }
+
     /** Android Auto's Exit: asks the car for its own interface, leaving the session running. */
     private fun requestNativeFocus() {
         if (!videoStarted) return
@@ -1266,6 +1413,38 @@ class GearslipRunner(
         log.i("touch -> frame: ${draw + encode}ms (draw ${draw}ms, encode and wait ${encode}ms)")
     }
 
+    /**
+     * Android Auto pings the car too, not only answers its pings; either side may. A 2021 Bolt
+     * hangs up 25 seconds into every drive while its own pings get answered and GM's channel is
+     * open (issue #18), so the one thing left that a real phone sends and Gearslip didn't is this.
+     */
+    private fun startPhonePings() {
+        Thread({
+            while (running && state == State.DONE) {
+                runCatching {
+                    send(MSG_PING_REQUEST, Protobuf.varintField(1, System.nanoTime() / 1_000), encrypted = true)
+                }.onFailure { return@Thread }
+                pingsSent++
+                if (pingsSent == 1) log.i("-> PingRequest (Gearslip pings the car once a second)")
+                try {
+                    Thread.sleep(PHONE_PING_MS)
+                } catch (e: InterruptedException) {
+                    return@Thread
+                }
+            }
+        }, "gearslip-ping").apply { isDaemon = true }.start()
+    }
+
+    @Volatile private var pingsSent = 0
+    private var pingsAnswered = 0
+
+    private fun onPingResponse() {
+        pingsAnswered++
+        if (pingsAnswered == 1 || pingsAnswered % PING_LOG_EVERY == 0) {
+            log.i("<- PingResponse ($pingsAnswered of $pingsSent answered)")
+        }
+    }
+
     private fun onPingRequest(body: ByteArray) {
         // The timestamp is an int64 and has to come back unchanged. Read as an int32 it was cut
         // short, and a car that checks the echo (an Audi MIB2+) gave up at its second ping.
@@ -1359,6 +1538,9 @@ class GearslipRunner(
         SessionReport.print()
     }
 
+    private val startedAt = System.currentTimeMillis()
+    private var toldStuck = false
+
     private fun startWatchdog() {
         Thread {
             var lastFrames = 0
@@ -1370,6 +1552,11 @@ class GearslipRunner(
                     val idle = System.currentTimeMillis() - lastProgress
                     if (idle > 10_000) log.w("stalled in state $state for ${idle / 1000}s")
                 }
+                if (!videoStarted && !toldStuck && System.currentTimeMillis() - startedAt > STUCK_MS) {
+                    toldStuck = true
+                    log.w("still not on the car's screen after ${STUCK_MS / 1000}s, in state $state")
+                    SessionStatus.stillConnecting(if (wireless) SessionStatus.Link.WIRELESS else SessionStatus.Link.CABLE)
+                }
 
                 // Stream health. Without this a drive cannot tell "streaming fine" from
                 // "stalled after three frames" - the per-frame logging is deliberately sparse.
@@ -1458,10 +1645,13 @@ class GearslipRunner(
         }
     }
 
-    private companion object {
+    internal companion object {
         /** The stats window adaptive bitrate reads, matching the watchdog's sleep. */
         const val ADAPT_WINDOW_MS = 5_000L
 
+        /** A car shows its screen within seconds; this long without one, Home says what to try. */
+        const val STUCK_MS = 45_000L
+
         // protobuf/aap_protobuf/service/control/ControlMessageType.proto:7-17
         const val MSG_VERSION_REQUEST = 1
         const val MSG_VERSION_RESPONSE = 2
@@ -1471,6 +1661,8 @@ class GearslipRunner(
         const val MSG_SERVICE_DISCOVERY_RESPONSE = 6
         const val MSG_PING_REQUEST = 11
         const val MSG_PING_RESPONSE = 12
+        private const val PHONE_PING_MS = 1_000L
+        private const val PING_LOG_EVERY = 60
         const val MSG_BYEBYE_REQUEST = 15
         const val MSG_BYEBYE_RESPONSE = 16
         const val MSG_VOICE_SESSION_NOTIFICATION = 17
@@ -1515,6 +1707,7 @@ class GearslipRunner(
         const val ACTION_UP = 1
 
         const val ACK_STALL_MS = 2_000L
+        const val WITHHELD_SCREEN_MS = 5_000L
         const val AUDIO_TRACE_MESSAGES = 6
         const val GUIDANCE_SESSION_ID = 1
         const val PERIODIC_KEYFRAME_MS = 5_000L

gearslip/src/main/java/app/seb3thehacker/gearslip/LauncherActivity.kt

@@ -0,0 +1,152 @@
+package app.seb3thehacker.gearslip
+
+import android.content.Intent
+import android.content.res.Configuration
+import android.os.Bundle
+import android.view.KeyEvent
+import android.view.WindowManager
+import androidx.activity.ComponentActivity
+import androidx.activity.OnBackPressedCallback
+import androidx.activity.compose.setContent
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.BoxWithConstraints
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material3.Button
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.DisposableEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalDensity
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.unit.dp
+import androidx.core.view.WindowCompat
+import androidx.core.view.WindowInsetsCompat
+import androidx.core.view.WindowInsetsControllerCompat
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import app.seb3thehacker.gearslip.car.CarEnvironment
+import app.seb3thehacker.gearslip.car.CarKeys
+import app.seb3thehacker.gearslip.car.CarSettings
+import app.seb3thehacker.gearslip.car.CarUi
+import app.seb3thehacker.gearslip.car.LauncherMode
+import app.seb3thehacker.gearslip.car.Prefetch
+import app.seb3thehacker.gearslip.ui.CarFrame
+import app.seb3thehacker.gearslip.ui.GearslipTheme
+import app.seb3thehacker.gearslip.ui.rememberCarProjector
+
+/**
+ * The home screen in launcher mode (see [LauncherMode]): the car UI, filling this device's own
+ * screen. It runs for as long as the activity lives, not only while it's in front, so a map
+ * keeps guiding and music keeps playing while another app is open over it.
+ */
+class LauncherActivity : ComponentActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        GearslipLog.init(this)
+        GearslipLog.installCrashHandler()
+        CarSettings.init(this)
+        CarKeys.init(this)
+        Prefetch.warm(this)
+        CarEnvironment.setPhoneTheme(resources.configuration)
+
+        // A dash screen is something to glance at: it stays on, with the system bars out of the way.
+        window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
+        WindowCompat.setDecorFitsSystemWindows(window, false)
+        WindowInsetsControllerCompat(window, window.decorView).apply {
+            systemBarsBehavior = WindowInsetsControllerCompat.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE
+            hide(WindowInsetsCompat.Type.systemBars())
+        }
+        // Back moves back in the car UI. A home screen has nowhere else to go back to.
+        onBackPressedDispatcher.addCallback(this, object : OnBackPressedCallback(true) {
+            override fun handleOnBackPressed() {
+                CarKeys.onKey(KeyEvent.KEYCODE_BACK, down = true, longPress = false)
+            }
+        })
+
+        setContent {
+            GearslipTheme {
+                LauncherScreen(onOpenGearslip = { startActivity(Intent(this, GearslipActivity::class.java)) })
+            }
+        }
+    }
+
+    /** Home pressed while Gearslip is already the home screen: back to the car UI's Home. */
+    override fun onNewIntent(intent: Intent) {
+        super.onNewIntent(intent)
+        CarKeys.onKey(KeyEvent.KEYCODE_HOME, down = true, longPress = false)
+    }
+
+    override fun onConfigurationChanged(newConfig: Configuration) {
+        super.onConfigurationChanged(newConfig)
+        CarEnvironment.setPhoneTheme(newConfig)
+    }
+
+    /** A head unit's knob, D-pad and hard keys work the car UI the way a car's do. */
+    override fun dispatchKeyEvent(event: KeyEvent): Boolean {
+        if (event.keyCode != KeyEvent.KEYCODE_BACK && event.repeatCount == 0 &&
+            CarKeys.onKey(event.keyCode, event.action == KeyEvent.ACTION_DOWN, event.isLongPress)
+        ) return true
+        return super.dispatchKeyEvent(event)
+    }
+}
+
+@Composable
+private fun LauncherScreen(onOpenGearslip: () -> Unit) {
+    val status by SessionStatus.state.collectAsStateWithLifecycle()
+    // Plugged into a car, this device is the phone and the car UI belongs on the car's screen.
+    val inCar = status.phase == SessionStatus.Phase.CONNECTING || status.phase == SessionStatus.Phase.PROJECTING
+    if (inCar) {
+        InCarNotice(onOpenGearslip)
+        return
+    }
+    BoxWithConstraints(Modifier.fillMaxSize().background(MaterialTheme.colorScheme.background)) {
+        val px = with(LocalDensity.current) { maxWidth.roundToPx() / 2 * 2 to maxHeight.roundToPx() / 2 * 2 }
+        val (width, height) = px
+        if (width <= 0 || height <= 0) return@BoxWithConstraints
+        // Car-like text and buttons: 160dpi for every 480 pixels of height, as the car preview uses.
+        // This screen stands in for the car's, so hosted apps size to it and the density setting applies.
+        val density = remember(width, height) {
+            CarEnvironment.setDisplay(width, height, (160 * height / 480).coerceIn(120, 640))
+            CarEnvironment.frame.value.densityDpi
+        }
+        // Before the projector starts, so the car UI's first screen already knows what to hide.
+        DisposableEffect(Unit) {
+            LauncherMode.setActive(true)
+            onDispose { LauncherMode.setActive(false) }
+        }
+        val projector = rememberCarProjector(width, height, density, "gearslip-launcher") { CarUi() }
+        DisposableEffect(projector) {
+            CarKeys.focusSink = { code, down -> projector.dispatchKey(code, down) }
+            onDispose { CarKeys.focusSink = null }
+        }
+        CarFrame(projector, width, height, Modifier.fillMaxSize())
+    }
+}
+
+@Composable
+private fun InCarNotice(onOpenGearslip: () -> Unit) {
+    Column(
+        Modifier.fillMaxSize().background(MaterialTheme.colorScheme.background).padding(32.dp),
+        horizontalAlignment = Alignment.CenterHorizontally,
+        verticalArrangement = Arrangement.Center,
+    ) {
+        Text(
+            stringResource(R.string.launcher_in_car),
+            style = MaterialTheme.typography.titleLarge,
+            textAlign = TextAlign.Center,
+            color = MaterialTheme.colorScheme.onBackground,
+        )
+        Spacer(Modifier.height(16.dp))
+        Button(onClick = onOpenGearslip) { Text(stringResource(R.string.launcher_open_gearslip)) }
+    }
+}

gearslip/src/main/java/app/seb3thehacker/gearslip/PhoneIcons.kt

@@ -0,0 +1,34 @@
+package app.seb3thehacker.gearslip
+
+import android.content.Context
+import android.graphics.Bitmap
+import android.graphics.Canvas
+import java.io.ByteArrayOutputStream
+
+/**
+ * Gearslip's own icon as the PNGs a phone hands the car in its ServiceDiscoveryRequest, at the
+ * 32, 64 and 128 px a real phone sends. Cars draw the phone's tile on their home screen from
+ * them, and older head units may wait for them before answering at all.
+ */
+object PhoneIcons {
+
+    private val SIZES = intArrayOf(32, 64, 128)
+
+    @Volatile private var cached: List<ByteArray>? = null
+
+    /** The three PNGs, smallest first; empty if the icon can't be drawn. */
+    fun pngs(context: Context): List<ByteArray> = cached ?: runCatching {
+        val icon = context.packageManager.getApplicationIcon(context.applicationInfo).mutate()
+        SIZES.map { size ->
+            val bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888)
+            icon.setBounds(0, 0, size, size)
+            icon.draw(Canvas(bitmap))
+            val png = ByteArrayOutputStream()
+            bitmap.compress(Bitmap.CompressFormat.PNG, 100, png)
+            bitmap.recycle()
+            png.toByteArray()
+        }
+    }.onFailure { GearslipLog.w("phone icons: couldn't draw them (${it.message})") }
+        .getOrDefault(emptyList())
+        .also { if (it.isNotEmpty()) cached = it }
+}

gearslip/src/main/java/app/seb3thehacker/gearslip/Projection.kt

@@ -24,6 +24,12 @@ interface Projection {
     fun onTouch(action: Int, actionIndex: Int, points: List<TouchPoint>)
 
     fun onProjectionStopped()
+
+    /**
+     * The screen has been still for a moment and the encoder has sent nothing since. Draw it once
+     * more, so the car gets a fresh frame (see [VideoSource]'s onStill).
+     */
+    fun onStill() {}
 }
 
 /** One finger on the car's screen: a stable [id] for as long as it stays down, and where it is. */

gearslip/src/main/java/app/seb3thehacker/gearslip/ScreenProjector.kt

@@ -223,6 +223,11 @@ class ScreenProjector(private val context: Context) {
      * Points the display at another surface, or none, without restarting what it shows. The
      * preview's SurfaceView comes and goes as the phone turns; the car UI on it carries on.
      */
+    /** Draws the screen again as it is, which hands the display's consumer a new frame. */
+    fun redraw() {
+        root?.let { it.post { it.invalidate() } }
+    }
+
     fun setSurface(surface: Surface?) {
         virtualDisplay?.surface = surface
     }

gearslip/src/main/java/app/seb3thehacker/gearslip/ServiceDiscovery.kt

@@ -51,8 +51,17 @@ object ServiceDiscovery {
             "$resolutionName @ $frameRateName, density=$density, margin=${widthMargin}x$heightMargin"
     }
 
-    /** [displayId] is MediaSinkService field 6: 0, the default, is the main screen. */
-    class VideoService(val serviceId: Int, val codecType: Int, val configs: List<VideoConfig>, val displayId: Int = 0) {
+    /**
+     * [displayId] is MediaSinkService field 6: 0, the default, is the main screen. [displayType]
+     * is field 7 (0 main, 1 instrument cluster, 2 auxiliary), or null when the car leaves it out.
+     */
+    class VideoService(
+        val serviceId: Int,
+        val codecType: Int,
+        val configs: List<VideoConfig>,
+        val displayId: Int = 0,
+        val displayType: Int? = null,
+    ) {
         val codecName: String get() = CODECS[codecType] ?: "unknown($codecType)"
     }
 
@@ -116,6 +125,12 @@ object ServiceDiscovery {
      */
     fun findMediaStatusChannel(response: ByteArray): Int? = findChannelWith(response, 9)
 
+    /**
+     * The channel the car takes call status on (PhoneStatusService, Service field 10), for its
+     * cluster and phone screens. It carries no settings. Null when the car has none.
+     */
+    fun findPhoneStatusChannel(response: ByteArray): Int? = findChannelWith(response, 10)
+
     class NavStatusService(val serviceId: Int, val minimumIntervalMs: Int)
 
     /** The cluster advertises its minimum update interval in NavigationStatusService field 1. */
@@ -185,6 +200,13 @@ object ServiceDiscovery {
             VendorService(id, name)
         }
 
+    /** The channel of the car's Wi-Fi projection service (Service field 14), or null. */
+    fun findWifiProjectionService(response: ByteArray): Int? =
+        Wire.allBytes(Wire.fields(response), 1).firstNotNullOfOrNull { channel ->
+            val service = Wire.fields(channel)
+            if (Wire.bytes(service, 14) == null) null else Wire.varint(service, 1)?.toInt()
+        }
+
     fun findBluetoothService(response: ByteArray): BluetoothService? {
         for (channel in Wire.allBytes(Wire.fields(response), 1)) {
             val service = Wire.fields(channel)
@@ -277,6 +299,19 @@ object ServiceDiscovery {
         return sinks.firstOrNull { it.displayId == 0 } ?: sinks.firstOrNull()
     }
 
+    /**
+     * The instrument cluster's video sink: one marked as a cluster, or, from a car that marks
+     * none, a second sink beside the main screen's. Null when the car has no cluster screen.
+     */
+    fun findClusterVideoService(response: ByteArray): VideoService? {
+        val sinks = videoServices(response)
+        val main = findVideoService(response) ?: return null
+        return sinks.firstOrNull { it.displayType == DISPLAY_TYPE_CLUSTER && it.serviceId != main.serviceId }
+            ?: sinks.firstOrNull { it.displayType == null && it.serviceId != main.serviceId && it.displayId != main.displayId }
+    }
+
+    private const val DISPLAY_TYPE_CLUSTER = 1
+
     private fun videoServices(response: ByteArray): List<VideoService> = buildList {
         for (channel in Wire.allBytes(Wire.fields(response), 1)) {
             val service = Wire.fields(channel)
@@ -298,7 +333,7 @@ object ServiceDiscovery {
                     heightMargin = Wire.varint(f, 4)?.toInt() ?: 0,
                 )
             }
-            add(VideoService(id, codecType, configs, Wire.varint(sinkFields, 6)?.toInt() ?: 0))
+            add(VideoService(id, codecType, configs, Wire.varint(sinkFields, 6)?.toInt() ?: 0, Wire.varint(sinkFields, 7)?.toInt()))
         }
     }
 

gearslip/src/main/java/app/seb3thehacker/gearslip/SessionReport.kt

@@ -18,6 +18,7 @@ object SessionReport {
     enum class Category(val label: String) {
         NONE("none"),
         USB("USB transport"),
+        WIFI("Wi-Fi transport"),
         NO_HANDSHAKE("head unit never started talking"),
         TLS("TLS handshake failed"),
         CERTIFICATE("certificate rejected by the head unit"),
@@ -218,7 +219,7 @@ object SessionReport {
             // switching the car off at the end shows up as a USB or ByeBye "failure" that isn't one.
             val reached = carScreen.isNotEmpty()
             val outcome = when {
-                reached && category in setOf(Category.NONE, Category.USB, Category.BYEBYE) -> "connected"
+                reached && category in setOf(Category.NONE, Category.USB, Category.WIFI, Category.BYEBYE) -> "connected"
                 reached -> "connected, then ${category.label}"
                 category == Category.NONE -> "ended before video"
                 else -> category.label

gearslip/src/main/java/app/seb3thehacker/gearslip/SessionStatus.kt

@@ -14,7 +14,10 @@ object SessionStatus {
 
     enum class Phase { IDLE, CONNECTING, PROJECTING, FAILED, DISCONNECTED }
 
-    data class Snapshot(val phase: Phase, val headline: String, val detail: String)
+    /** [stuckOn] is set when connecting has gone on too long: the cable or Wi-Fi, for what to try. */
+    data class Snapshot(val phase: Phase, val headline: String, val detail: String, val stuckOn: Link? = null)
+
+    enum class Link { CABLE, WIRELESS }
 
     private val flow = MutableStateFlow(
         Snapshot(
@@ -30,6 +33,12 @@ object SessionStatus {
         flow.value = Snapshot(Phase.CONNECTING, "Connecting", stage)
     }
 
+    /** Still connecting after [GearslipRunner]'s patience ran out: Home says what to try. */
+    fun stillConnecting(link: Link) {
+        val now = flow.value
+        if (now.phase == Phase.CONNECTING) flow.value = now.copy(stuckOn = link)
+    }
+
     fun projecting() {
         flow.value = Snapshot(Phase.PROJECTING, "Projecting", "Streaming to the head unit.")
     }

gearslip/src/main/java/app/seb3thehacker/gearslip/VideoSource.kt

@@ -27,6 +27,12 @@ class VideoSource(
     private val wireless: Boolean = false,
     private val onCodecConfig: (ByteArray) -> Unit,
     private val onFrame: (data: ByteArray, presentationTimeUs: Long, keyFrame: Boolean) -> Unit,
+    /**
+     * SURFACE mode, nothing encoded for [STILL_MS]. The repeat setting below should cover a still
+     * screen, but on a Pixel 10 it didn't: a LuChi box got 11 frames, then none, and stayed black
+     * (issue #58). Whoever draws the screen can draw it again, and that is a frame.
+     */
+    private val onStill: () -> Unit = {},
 ) {
     private val log = GearslipLog.tagged("VIDEO")
 
@@ -170,6 +176,8 @@ class VideoSource(
     private fun pump(encoder: MediaCodec) {
         val info = MediaCodec.BufferInfo()
         val frameIntervalUs = 1_000_000L / frameRate
+        var lastOutputAt = 0L
+        var lastNudgeAt = 0L
 
         while (running) {
             // SURFACE mode has no input buffers to fill - frames arrive from the display.
@@ -208,8 +216,16 @@ class VideoSource(
                     }
                 }
                 encoder.releaseOutputBuffer(outIndex, false)
+                lastOutputAt = System.currentTimeMillis()
                 outIndex = encoder.dequeueOutputBuffer(info, 0)
             }
+            if (mode == Mode.SURFACE && lastOutputAt > 0) {
+                val now = System.currentTimeMillis()
+                if (now - lastOutputAt > STILL_MS && now - lastNudgeAt > STILL_MS) {
+                    lastNudgeAt = now
+                    onStill()
+                }
+            }
 
             if (mode != Mode.SURFACE) Thread.sleep(maxOf(1L, frameIntervalUs / 2000))
         }
@@ -256,6 +272,7 @@ class VideoSource(
         const val MIME = MediaFormat.MIMETYPE_VIDEO_AVC
         const val TIMEOUT_US = 10_000L
         const val SURFACE_TIMEOUT_US = 100_000L
+        private const val STILL_MS = 1_000L
 
         /**
          * 800x480 at 30fps gets 8 Mbps: about the most that size can show, enough that a moving

gearslip/src/main/java/app/seb3thehacker/gearslip/audio/AacEncoder.kt

@@ -87,8 +87,17 @@ internal class AacEncoder(private val sampleRate: Int, private val channels: Int
         runCatching { codec.release() }
     }
 
-    private companion object {
-        const val INPUT_WAIT_US = 10_000L
-        val FREQUENCIES = listOf(96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000, 7350)
+    companion object {
+        private const val INPUT_WAIT_US = 10_000L
+        private val FREQUENCIES = listOf(96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000, 7350)
+
+        /** The two-byte AudioSpecificConfig for AAC-LC: object type 2, rate index, channel count. */
+        fun audioSpecificConfig(sampleRate: Int, channels: Int): ByteArray {
+            val freq = FREQUENCIES.indexOf(sampleRate).let { if (it < 0) 3 else it }
+            return byteArrayOf(
+                ((2 shl 3) or (freq shr 1)).toByte(),
+                (((freq and 1) shl 7) or (channels shl 3)).toByte(),
+            )
+        }
     }
 }

gearslip/src/main/java/app/seb3thehacker/gearslip/audio/AudioLink.kt

@@ -36,6 +36,9 @@ class AudioLink(
     private val onClose: (AudioLink) -> Unit = { CarAudio.detach(it) },
     /** The car took the sound back after giving it, as when the driver switches to the radio. */
     private val onTakenBack: () -> Unit = {},
+    /** The car wants the speakers for a moment (a call, its own voice), and then [onGivenBack]. */
+    private val onPausedForNow: () -> Unit = {},
+    private val onGivenBack: () -> Unit = {},
 ) : CarAudio.Link {
 
     private var configIndex = 0
@@ -43,6 +46,8 @@ class AudioLink(
     @Volatile private var started = false
     @Volatile private var focusGranted = false
     @Volatile private var focusRequested = false
+    /** The car took the speakers for a moment, and we paused the phone's music until it's done. */
+    @Volatile private var pausedForNow = false
     @Volatile private var inFlight = 0
     // The Uconnect asks for 4 on its video channel; assume the same until its Config says otherwise.
     @Volatile private var maxUnacked = 4
@@ -52,6 +57,10 @@ class AudioLink(
     private var bytes = 0L
     private var dropped = 0
     @Volatile private var configTimer: Thread? = null
+    /** Underflows the car reported this drive, and the silence still to slip in ahead of the next chunk. */
+    private var underflows = 0
+    @Volatile private var padMs = 0
+    @Volatile private var pendingPadMs = 0
     private val ackLock = Object()
     /** Only for a sink that takes AAC and nothing else; PCM sinks get the capture as it is. */
     @Volatile private var aac: AacEncoder? = null
@@ -66,6 +75,9 @@ class AudioLink(
     /** Sending audio now, which for media means the car has handed us the speakers. */
     val streaming get() = started
 
+    /** The car has set the sink up, so a stream can start. */
+    val isReady get() = ready
+
     @Volatile private var holdsSpeakers = false
     @Volatile private var focusAnswer: CountDownLatch? = null
     @Volatile private var answerDueBy = 0L
@@ -104,6 +116,21 @@ class AudioLink(
         GearslipLog.i("$tag: -> AudioFocusRequest(RELEASE)")
     }
 
+    /**
+     * A spoken turn on the music channel while no music plays (see DirectionsVoice): the stream
+     * runs for the turn only, under ducking focus like the directions channel's, so the radio
+     * comes back after it rather than giving way to Android Auto for good.
+     */
+    fun startForTurn() {
+        askForSpeakers()
+        startStream()
+    }
+
+    fun stopForTurn() {
+        synchronized(startLock) { stopLocked(release = false) }
+        handBackSpeakers()
+    }
+
     fun opened(status: Int) {
         GearslipLog.i("$tag: <- ChannelOpenResponse: status=$status")
         if (status != 0) {
@@ -180,6 +207,8 @@ class AudioLink(
                 }
             }
 
+            MSG_UNDERFLOW -> onUnderflow()
+
             MSG_ACK -> {
                 val acked = Wire.varint(Wire.fields(body), 2)?.toInt() ?: 1
                 synchronized(ackLock) {
@@ -207,7 +236,7 @@ class AudioLink(
     fun onFocus(state: Int) {
         val name = FOCUS_STATES[state] ?: "unknown($state)"
         GearslipLog.i("$tag: <- AudioFocusResponse state=$name")
-        if (!asksFocus) {
+        if (!asksFocus || expectsFocusAnswer()) {
             // Directions speak whatever the answer: a lost turn is worse than a loud one.
             answerDueBy = 0L
             focusAnswer?.countDown()
@@ -216,11 +245,54 @@ class AudioLink(
         val had = focusGranted
         focusGranted = state == FOCUS_STATE_GAIN || state == FOCUS_STATE_GAIN_TRANSIENT ||
             state == FOCUS_STATE_GAIN_MEDIA_ONLY
-        if (focusGranted) startStream() else stop()
-        // A ducking request leaves the music playing; a loss means another source has the speakers.
-        if (had && (state == FOCUS_STATE_LOSS || state == FOCUS_STATE_LOSS_TRANSIENT)) onTakenBack()
+        when {
+            focusGranted -> {
+                startStream()
+                if (pausedForNow) {
+                    pausedForNow = false
+                    onGivenBack()
+                }
+            }
+            // A call or the car's own voice. Releasing focus here meant the car never handed it
+            // back, so the music stayed paused after the call: keep the claim and wait for GAIN.
+            state == FOCUS_STATE_LOSS_TRANSIENT -> {
+                synchronized(startLock) { stopLocked(release = false) }
+                if (had) {
+                    pausedForNow = true
+                    onPausedForNow()
+                }
+            }
+            else -> {
+                stop()
+                // A ducking request leaves the music playing; a loss means another source has the speakers.
+                if (state == FOCUS_STATE_LOSS && (had || pausedForNow)) {
+                    pausedForNow = false
+                    onTakenBack()
+                }
+            }
+        }
     }
 
+    /**
+     * The car ran out of sound to play (AudioUnderflowNotification, no body): its buffer emptied
+     * before the next chunk arrived, which the driver hears as a gap. Capture runs in real time, so
+     * the car's buffer only ever holds what the window lets through. A little silence slipped in
+     * ahead of the next chunk puts it that far ahead, so the next slow patch is soaked up rather
+     * than heard. Capped, as each step adds a little delay to the music.
+     */
+    private fun onUnderflow() {
+        underflows++
+        val step = if (started && padMs < MAX_PAD_MS) PAD_STEP_MS else 0
+        padMs += step
+        pendingPadMs += step
+        if (underflows <= 3 || underflows % 20 == 0) {
+            GearslipLog.w("$tag: <- AudioUnderflow ($underflows this drive) - running ${padMs}ms ahead now")
+        }
+    }
+
+    /** Silence for [ms], whole frames of this sink's format. */
+    private fun silence(ms: Int): ByteArray = ByteArray(sampleRate * ms / 1000 * channels * 2)
+
     override fun start() {
         if (!ready || started) return
         if (asksFocus && !focusRequested) {
@@ -251,6 +323,12 @@ class AudioLink(
             MSG_START,
             Protobuf.varintField(1, sessionId.toLong()) + Protobuf.varintField(2, configIndex.toLong()),
         )
+        // Raw AAC-LC has no header of its own: the car needs the codec config before the first frame.
+        if (service.codecType == ServiceDiscovery.CODEC_AAC_LC) {
+            val asc = AacEncoder.audioSpecificConfig(sampleRate, channels)
+            sendOnChannel(MSG_CODEC_CONFIG, asc)
+            GearslipLog.hex("$tag: -> CodecConfig (AudioSpecificConfig)", asc)
+        }
         inFlight = 0
         lastAckAt = System.currentTimeMillis()
         if (aacSink && aac == null) {
@@ -267,25 +345,39 @@ class AudioLink(
         synchronized(startLock) { stopLocked() }
     }
 
-    private fun stopLocked() {
+    /** [release] false keeps our claim on the speakers, so the car hands them back on its own. */
+    private fun stopLocked(release: Boolean = true) {
         if (!started) return
         started = false
         synchronized(ackLock) { ackLock.notifyAll() }
         runCatching {
             sendOnChannel(MSG_STOP, Protobuf.varintField(1, sessionId.toLong()))
-            if (focusRequested) sendControl(MSG_FOCUS_REQUEST, Protobuf.varintField(1, FOCUS_RELEASE.toLong()))
+            if (release && focusRequested) sendControl(MSG_FOCUS_REQUEST, Protobuf.varintField(1, FOCUS_RELEASE.toLong()))
         }
-        focusRequested = false
+        if (release) focusRequested = false
         focusGranted = false
         aac?.release()
         aac = null
-        GearslipLog.i("$tag: -> Stop, AudioFocusRequest(RELEASE) after $chunks chunks / $bytes bytes")
+        GearslipLog.i("$tag: -> Stop${if (release) ", AudioFocusRequest(RELEASE)" else ""} after $chunks chunks / $bytes bytes")
         chunks = 0
         bytes = 0
+        // A new stream starts with the car's buffer empty again: earn the lead back if it's needed.
+        padMs = 0
+        pendingPadMs = 0
     }
 
     override fun write(pcm: ByteArray, size: Int) {
         if (!started) return
+        val pad = pendingPadMs
+        if (pad > 0) {
+            pendingPadMs = 0
+            val quiet = silence(pad)
+            writeNow(quiet, quiet.size)
+        }
+        writeNow(pcm, size)
+    }
+
+    private fun writeNow(pcm: ByteArray, size: Int) {
         val encoder = aac
         if (encoder == null) {
             send(pcm.copyOf(size))
@@ -364,12 +456,16 @@ class AudioLink(
         const val MSG_FOCUS_RESPONSE = 19
         private const val MSG_CHANNEL_OPEN_RESPONSE = 8
         private const val MSG_DATA = 0
+        private const val MSG_CODEC_CONFIG = 1
         private const val MSG_SETUP = 32768
         private const val MSG_START = 32769
         private const val MSG_STOP = 32770
         private const val MSG_CONFIG = 32771
         private const val MSG_ACK = 32772
         private const val MSG_SETUP_ANSWER = 255
+        private const val MSG_UNDERFLOW = 32779 // 0x800B, car to phone, no body
+        private const val PAD_STEP_MS = 60
+        private const val MAX_PAD_MS = 240
         private const val STATUS_READY = 2
         private const val FOCUS_GAIN = 1
         private const val FOCUS_GAIN_TRANSIENT_MAY_DUCK = 3

gearslip/src/main/java/app/seb3thehacker/gearslip/audio/CarAudio.kt

@@ -137,6 +137,59 @@ object CarAudio {
 
     internal fun deliver(pcm: ByteArray, size: Int, peak: Float) {
         _level.value = peak
-        link?.write(pcm, size)
+        val voice = synchronized(voiceLock) { spoken }
+        if (voice == null) link?.write(pcm, size) else link?.write(mixVoice(pcm, size), size)
     }
+
+    private val voiceLock = Any()
+    private var spoken: ByteArray? = null
+    private var spokenAt = 0
+    private var spokenDone: java.util.concurrent.CountDownLatch? = null
+
+    /**
+     * Mixes a spoken turn into the music from the next chunk on, with the music turned down
+     * under it, and waits until it has all gone out. [pcm] is 16-bit, in the sink's own format.
+     * False when no music is flowing to carry it, so the caller sends it some other way.
+     */
+    fun speakOverMusic(pcm: ByteArray): Boolean {
+        if (_capture.value != Capture.ON || (link as? AudioLink)?.streaming != true) return false
+        val done = java.util.concurrent.CountDownLatch(1)
+        synchronized(voiceLock) {
+            spokenDone?.countDown()
+            spoken = pcm
+            spokenAt = 0
+            spokenDone = done
+        }
+        val ms = pcm.size * 1000L / (2 * channels * sampleRate)
+        if (!done.await(ms + VOICE_SLACK_MS, java.util.concurrent.TimeUnit.MILLISECONDS)) {
+            // Capture stopped mid-turn; the rest of it is dropped rather than played late.
+            synchronized(voiceLock) { if (spokenDone === done) spoken = null }
+        }
+        return true
+    }
+
+    private fun mixVoice(pcm: ByteArray, size: Int): ByteArray = synchronized(voiceLock) {
+        val voice = spoken ?: return pcm
+        val out = pcm.copyOf(size)
+        var i = 0
+        while (i + 1 < size) {
+            val music = (out[i].toInt() and 0xFF) or (out[i + 1].toInt() shl 8)
+            val word = if (spokenAt + 1 < voice.size) (voice[spokenAt].toInt() and 0xFF) or (voice[spokenAt + 1].toInt() shl 8) else 0
+            val mixed = (music * DUCK_PERCENT / 100 + word).coerceIn(Short.MIN_VALUE.toInt(), Short.MAX_VALUE.toInt())
+            out[i] = mixed.toByte()
+            out[i + 1] = (mixed shr 8).toByte()
+            i += 2
+            spokenAt += 2
+        }
+        if (spokenAt >= voice.size) {
+            spoken = null
+            spokenDone?.countDown()
+            spokenDone = null
+        }
+        out
+    }
+
+    /** How loud the music stays under a spoken turn. */
+    private const val DUCK_PERCENT = 30
+    private const val VOICE_SLACK_MS = 2_000L
 }

gearslip/src/main/java/app/seb3thehacker/gearslip/call/CarPhoneStatus.kt

@@ -0,0 +1,108 @@
+package app.seb3thehacker.gearslip.call
+
+import android.os.SystemClock
+import android.view.KeyEvent
+import app.seb3thehacker.gearslip.GearslipLog
+import app.seb3thehacker.gearslip.Protobuf
+import app.seb3thehacker.gearslip.Wire
+import app.seb3thehacker.gearslip.car.CarKeys
+
+/**
+ * Tells the car about calls, so its own screens show them: the instrument cluster, the steering
+ * wheel display, the car's phone page. Android Auto does the same over the car's
+ * PhoneStatusService (Service field 10):
+ *
+ *   -> PhoneStatusUpdate { repeated PhoneCall calls = 1 }
+ *        PhoneCall { state = 1 (1 in call, 4 incoming, 6 muted); duration_seconds = 2;
+ *                    number = 3; name = 4 }
+ *   <- PhoneStatusInput { input = 1 { action = 1 (7 call) }; caller = 2; name = 3 }
+ *
+ * Read once a second from [CarCalls]. An update goes when the call changes, and every second
+ * while one is going, so the car's timer counts along; no calls goes once, as an empty list.
+ * The car's own call button answers through [CarKeys], like the steering wheel's.
+ */
+class CarPhoneStatus(
+    val channelId: Int,
+    private val sendOnChannel: (messageId: Int, body: ByteArray) -> Unit,
+) {
+    @Volatile private var running = false
+    private var sent: String? = null
+
+    fun onMessage(messageId: Int, body: ByteArray) {
+        when (messageId) {
+            MSG_CHANNEL_OPEN_RESPONSE -> {
+                val status = Protobuf.readInt32Field(body, 1)
+                GearslipLog.i("phone status: <- ChannelOpenResponse: status=$status")
+                if (status == 0) start()
+            }
+            MSG_INPUT -> onInput(body)
+            else -> GearslipLog.i("phone status: <- unhandled message id=$messageId (${body.size} bytes)")
+        }
+    }
+
+    private fun start() {
+        if (running) return
+        running = true
+        Thread({
+            while (running) {
+                runCatching { tick() }.onFailure { GearslipLog.w("phone status: ${it.message}") }
+                Thread.sleep(TICK_MS)
+            }
+        }, "gearslip-phone-status").start()
+    }
+
+    fun stop() {
+        running = false
+    }
+
+    private fun tick() {
+        val call = when (val state = CarCalls.state.value) {
+            CallUiState.None -> null
+            is CallUiState.Ringing -> Call(STATE_INCOMING, 0, state.caller)
+            is CallUiState.Active -> Call(
+                if (CarCalls.muted.value) STATE_MUTED else STATE_IN_CALL,
+                ((SystemClock.uptimeMillis() - state.since) / 1000).coerceAtLeast(0),
+                state.caller,
+            )
+        }
+        // Only a call that's going changes from one second to the next.
+        val key = call?.let { "${it.state}|${it.caller?.number}|${it.caller?.name}|${if (it.state == STATE_INCOMING) 0 else it.seconds}" } ?: ""
+        if (key == sent) return
+        val changed = call?.state != lastState
+        sent = key
+        lastState = call?.state
+        val body = call?.let { Protobuf.bytesField(1, it.encode()) } ?: ByteArray(0)
+        sendOnChannel(MSG_STATUS, body)
+        if (changed) GearslipLog.i("phone status: -> ${call?.let { STATE_NAMES[it.state] } ?: "no calls"}")
+    }
+
+    private var lastState: Int? = null
+
+    private class Call(val state: Int, val seconds: Long, val caller: Caller?) {
+        fun encode(): ByteArray {
+            var body = Protobuf.varintField(1, state.toLong()) + Protobuf.varintField(2, seconds)
+            caller?.number?.takeIf { it.isNotBlank() }?.let { body += Protobuf.stringField(3, it) }
+            caller?.name?.takeIf { it.isNotBlank() }?.let { body += Protobuf.stringField(4, it) }
+            return body
+        }
+    }
+
+    /** The car's own phone buttons. Only "call" does anything: it answers, as the wheel's does. */
+    private fun onInput(body: ByteArray) {
+        val action = Wire.bytes(Wire.fields(body), 1)?.let { Wire.varint(Wire.fields(it), 1)?.toInt() }
+        GearslipLog.i("phone status: <- input action=${action ?: "?"}")
+        if (action == ACTION_CALL) CarKeys.onKey(KeyEvent.KEYCODE_CALL, down = true, longPress = false)
+    }
+
+    companion object {
+        private const val TICK_MS = 1_000L
+        private const val MSG_CHANNEL_OPEN_RESPONSE = 8
+        private const val MSG_STATUS = 32769 // 0x8001
+        private const val MSG_INPUT = 32770 // 0x8002
+        private const val STATE_IN_CALL = 1
+        private const val STATE_INCOMING = 4
+        private const val STATE_MUTED = 6
+        private const val ACTION_CALL = 7
+        private val STATE_NAMES = mapOf(STATE_IN_CALL to "in a call", STATE_INCOMING to "ringing", STATE_MUTED to "in a call, muted")
+    }
+}

gearslip/src/main/java/app/seb3thehacker/gearslip/car/AllAppsScreen.kt

@@ -0,0 +1,65 @@
+package app.seb3thehacker.gearslip.car
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.lazy.grid.GridCells
+import androidx.compose.foundation.lazy.grid.LazyVerticalGrid
+import androidx.compose.foundation.lazy.grid.items
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.produceState
+import androidx.compose.runtime.remember
+import androidx.compose.ui.graphics.asImageBitmap
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.unit.dp
+import app.seb3thehacker.gearslip.R
+import app.seb3thehacker.gearslip.mirror.PhoneApp
+import app.seb3thehacker.gearslip.mirror.PhoneApps
+import androidx.core.graphics.drawable.toBitmap
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+
+/**
+ * Launcher mode's app drawer: every app on the device, A to Z, each opened full screen. Gearslip
+ * comes first, for its own settings, which the car UI only partly covers.
+ */
+@Composable
+fun AllAppsScreen() {
+    val context = LocalContext.current
+    val apps by produceState(initialValue = PhoneApps.cached() ?: emptyList(), context) {
+        value = PhoneApps.cached() ?: withContext(Dispatchers.IO) { PhoneApps.installed(context).also { PhoneApps.warm(context) } }
+    }
+    val gearslip = remember(context) {
+        val label = context.packageManager.getApplicationLabel(context.applicationInfo).toString()
+        val icon = runCatching { context.packageManager.getApplicationIcon(context.packageName).toBitmap(ICON_PX, ICON_PX).asImageBitmap() }
+        PhoneApp(context.packageName, label, icon.getOrNull())
+    }
+
+    Column(Modifier.fillMaxSize().padding(start = 20.dp, end = 20.dp, top = 12.dp)) {
+        ScreenHeader(stringResource(R.string.app_all_apps))
+        Spacer(Modifier.height(12.dp))
+        LazyVerticalGrid(
+            columns = GridCells.Adaptive(minSize = 108.dp),
+            modifier = Modifier.fillMaxSize(),
+            contentPadding = PaddingValues(bottom = 16.dp),
+            horizontalArrangement = Arrangement.spacedBy(12.dp),
+            verticalArrangement = Arrangement.spacedBy(12.dp),
+        ) {
+            item {
+                PhoneAppTile(gearslip) { LauncherMode.launch(context, context.packageName) }
+            }
+            items(apps.sortedBy { it.label.lowercase() }) { app ->
+                PhoneAppTile(app) { LauncherMode.launch(context, app.packageName) }
+            }
+        }
+    }
+}
+
+private const val ICON_PX = 128

gearslip/src/main/java/app/seb3thehacker/gearslip/car/AssistantCommands.kt

@@ -61,7 +61,7 @@ object AssistantCommands {
 
     private suspend fun allEntries(context: Context): List<Entry> {
         val vehicleData = CarSettings.experimentalFeaturesEnabled.value && CarSettings.carSensorsEnabled.value
-        val builtIn = BuiltInApps.entries.filter { it.builtIn !== BuiltInApps.VehicleData || vehicleData }
+        val builtIn = BuiltInApps.entries(LauncherMode.active.value, LauncherMode.canCall(context)).filter { it.builtIn !== BuiltInApps.VehicleData || vehicleData }
         return builtIn + (LauncherCache.entries ?: withContext(Dispatchers.IO) { LauncherCache.load(context) })
     }
 
@@ -95,7 +95,12 @@ object AssistantCommands {
         heard: String,
     ): String? {
         // "use Organic Maps to get to X", "open OsmAnd and navigate to X": the app comes first.
-        var text = heard
+        // "take me home", "go home": no "to", so no trigger would catch them.
+        var text = if (Regex("^(?:(?:take|bring|get|drive) me|go|drive|head|get|directions|go back|head back) home$").matches(heard)) {
+            "navigate to home"
+        } else {
+            heard
+        }
         var leadingApp: String? = null
         Regex("^(?:use|using|with|open|in|on) (.+?) (?:to |and )(.+)$").find(text)?.let { m ->
             if (after(m.groupValues[2], NAVIGATE_TRIGGERS) != null) {
@@ -135,6 +140,20 @@ object AssistantCommands {
         val (place, nearby) = plainPlace(destination)
         destination = place
         if (destination.isBlank()) return "Where to?"
+        // "home", "work", or a name from Saved places: its address is the search.
+        var spoken: String? = null
+        SavedPlaces.match(context, destination)?.let { (slot, saved) ->
+            val name = when (slot) {
+                SavedPlaces.HOME -> "home"
+                SavedPlaces.WORK -> "work"
+                else -> saved.label
+            }
+            if (saved.address.isBlank()) {
+                return "You haven't saved a $name address yet. Add it under Saved places in Gearslip's settings on your phone."
+            }
+            destination = saved.address
+            spoken = if (slot == SavedPlaces.HOME) "home" else "to $name"
+        }
 
         val chosen = chosenApp ?: when {
             navApps.size == 1 -> navApps.first()
@@ -144,6 +163,7 @@ object AssistantCommands {
 
         CarServices.connectNav(template, frame, destination)
         navigator.home()
+        spoken?.let { return "Navigating $it with ${chosen.label}." }
         return if (nearby) "Finding the nearest $destination with ${chosen.label}." else "Navigating to $destination with ${chosen.label}."
     }
 

gearslip/src/main/java/app/seb3thehacker/gearslip/car/BluetoothAudioCheck.kt

@@ -98,7 +98,7 @@ object BluetoothAudioCheck {
         if (!armed) return
         val context = appContext ?: return
         if (CarSettings.pipeAudio.value) {
-            set(false, "USB audio is on")
+            set(false, "audio goes through Gearslip")
             return
         }
         if (!CarSettings.bluetoothWarning.value) {

gearslip/src/main/java/app/seb3thehacker/gearslip/car/BluetoothPairOverlay.kt

@@ -1,5 +1,7 @@
 package app.seb3thehacker.gearslip.car
 
+import androidx.compose.ui.res.stringResource
+import app.seb3thehacker.gearslip.R
 import app.seb3thehacker.gearslip.car.theme.*
 import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
@@ -45,32 +47,28 @@ internal fun BluetoothPairOverlay() {
             val locationOff by LocationCheck.off.collectAsState()
             val locationDismissed by LocationCheck.carDismissed.collectAsState()
             if (missing && bluetoothAudio && warn && !dismissed) PairCard(
-                title = "Bluetooth isn't connected",
-                body = "Music plays over Bluetooth, but your phone isn't connected to the car. " +
-                    "Connect it from the car's Bluetooth menu or your phone's.",
-                secondary = "Don't show again" to BluetoothAudioCheck::neverAgain,
-                primary = "OK" to BluetoothAudioCheck::dismissOnCar,
+                title = stringResource(R.string.home_bt_title),
+                body = stringResource(R.string.overlay_bt_body),
+                secondary = stringResource(R.string.overlay_dont_show) to BluetoothAudioCheck::neverAgain,
+                primary = stringResource(R.string.overlay_ok) to BluetoothAudioCheck::dismissOnCar,
             ) else if (locationOff && !locationDismissed) PairCard(
-                title = "Location is off",
-                body = "Map apps can't show where you are or give directions. Turn on location " +
-                    "in your phone's quick settings when you're parked.",
-                secondary = "Don't show again" to LocationCheck::neverAgain,
-                primary = "OK" to LocationCheck::dismissOnCar,
+                title = stringResource(R.string.overlay_location_off),
+                body = stringResource(R.string.overlay_location_body),
+                secondary = stringResource(R.string.overlay_dont_show) to LocationCheck::neverAgain,
+                primary = stringResource(R.string.overlay_ok) to LocationCheck::dismissOnCar,
             )
         }
         CarBluetooth.Prompt.ASK -> PairCard(
-            title = "Pair with this car?",
-            body = (if (bluetoothAudio) "Calls and music play" else "Calls play") +
-                " through the car's speakers once your phone and the car are paired. Your phone " +
-                "then asks you to confirm a code.",
-            secondary = "Not now" to CarBluetooth::notNow,
-            primary = "Pair" to CarBluetooth::pair,
+            title = stringResource(R.string.overlay_pair_title),
+            body = stringResource(if (bluetoothAudio) R.string.overlay_pair_body_music else R.string.overlay_pair_body),
+            secondary = stringResource(R.string.worked_not_now) to CarBluetooth::notNow,
+            primary = stringResource(R.string.overlay_pair) to CarBluetooth::pair,
         )
         CarBluetooth.Prompt.PAIRING -> PairCard(
-            title = "Confirm on your phone",
-            body = "Check the code on your phone and tap Pair. The car may ask too.",
+            title = stringResource(R.string.overlay_confirm_title),
+            body = stringResource(R.string.overlay_confirm_body),
             secondary = null,
-            primary = "Hide" to CarBluetooth::hide,
+            primary = stringResource(R.string.carset_hide) to CarBluetooth::hide,
         )
     }
 }

gearslip/src/main/java/app/seb3thehacker/gearslip/car/CallOverlay.kt

@@ -1,5 +1,7 @@
 package app.seb3thehacker.gearslip.car
 
+import androidx.compose.ui.res.stringResource
+import app.seb3thehacker.gearslip.R
 import androidx.compose.foundation.shape.CircleShape
 import app.seb3thehacker.gearslip.car.theme.*
 import androidx.compose.foundation.layout.Arrangement
@@ -63,7 +65,7 @@ private fun IncomingCall(s: CallUiState.Ringing, onAnswer: () -> Unit, onDecline
             )
             Spacer(Modifier.height(16.dp))
             Text(
-                "Incoming call",
+                stringResource(R.string.call_incoming),
                 style = MaterialTheme.typography.titleMedium,
                 color = MaterialTheme.colorScheme.onSurfaceVariant,
             )
@@ -76,13 +78,13 @@ private fun IncomingCall(s: CallUiState.Ringing, onAnswer: () -> Unit, onDecline
             )
             Spacer(Modifier.height(56.dp))
             Row(horizontalArrangement = Arrangement.spacedBy(48.dp)) {
-                CallButton(Icons.Filled.Close, "Decline", MaterialTheme.colorScheme.error, enabled = s.canDecline, onClick = onDecline)
-                CallButton(Icons.Filled.Call, "Answer", MaterialTheme.colorScheme.primary, enabled = true, onClick = onAnswer)
+                CallButton(Icons.Filled.Close, stringResource(R.string.call_decline), MaterialTheme.colorScheme.error, enabled = s.canDecline, onClick = onDecline)
+                CallButton(Icons.Filled.Call, stringResource(R.string.call_answer), MaterialTheme.colorScheme.primary, enabled = true, onClick = onAnswer)
             }
             if (!s.canDecline) {
                 Spacer(Modifier.height(20.dp))
                 Text(
-                    "Already ringing out loud - answer here, or let it ring.",
+                    stringResource(R.string.call_ringing),
                     style = MaterialTheme.typography.bodySmall,
                     color = MaterialTheme.colorScheme.onSurfaceVariant,
                 )

gearslip/src/main/java/app/seb3thehacker/gearslip/car/CarAlerts.kt

@@ -0,0 +1,203 @@
+package app.seb3thehacker.gearslip.car
+
+import androidx.annotation.MainThread
+import androidx.car.app.model.Action
+import androidx.car.app.model.Alert
+import androidx.car.app.model.AlertCallback
+import androidx.compose.animation.core.Animatable
+import androidx.compose.animation.core.LinearEasing
+import androidx.compose.animation.core.tween
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.layout.widthIn
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Close
+import androidx.compose.material3.Icon
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.semantics.LiveRegionMode
+import androidx.compose.ui.semantics.liveRegion
+import androidx.compose.ui.semantics.semantics
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.unit.dp
+import app.seb3thehacker.gearslip.GearslipLog
+import app.seb3thehacker.gearslip.R
+import app.seb3thehacker.gearslip.car.theme.GsColors
+import app.seb3thehacker.gearslip.car.theme.GsIconBox
+import app.seb3thehacker.gearslip.host.cancel
+import app.seb3thehacker.gearslip.host.click
+import app.seb3thehacker.gearslip.host.color
+import app.seb3thehacker.gearslip.host.dismissed
+import app.seb3thehacker.gearslip.host.text
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+
+/**
+ * The one alert on the car screen, from whichever hosted app sent it: Waze asking whether a
+ * hazard is still there, say. As in Android Auto, a newer alert replaces the one showing, and it
+ * shows over any screen, since a question about the road matters while music is up too.
+ */
+@MainThread
+internal object CarAlerts {
+    class Shown(val owner: Any, val alert: Alert)
+
+    private val current = MutableStateFlow<Shown?>(null)
+    val shown: StateFlow<Shown?> = current.asStateFlow()
+
+    fun show(owner: Any, alert: Alert) {
+        val old = current.value
+        current.value = Shown(owner, alert)
+        GearslipLog.i("host: alert ${alert.id} \"${alert.title.text()}\" with ${alert.actions.size} buttons")
+        if (old != null && !(old.owner === owner && old.alert.id == alert.id)) old.alert.callbackDelegate.dismissed()
+    }
+
+    /** The app took its alert down; a no-op unless that alert is the one showing. */
+    fun dismiss(owner: Any, id: Int) {
+        val shown = current.value ?: return
+        if (shown.owner !== owner || shown.alert.id != id) return
+        current.value = null
+        shown.alert.callbackDelegate.dismissed()
+    }
+
+    /** The driver tapped one of its buttons: the app gets the tap, and the alert goes. */
+    fun tapped(shown: Shown, action: Action) {
+        action.onClickDelegate.click("alert button")
+        if (current.value !== shown) return
+        current.value = null
+        shown.alert.callbackDelegate.dismissed()
+    }
+
+    fun cancelled(shown: Shown, reason: Int) {
+        if (current.value !== shown) return
+        current.value = null
+        shown.alert.callbackDelegate.cancel(reason)
+    }
+
+    /** The app disconnected: its alert goes with it, and there is no one left to tell. */
+    fun clear(owner: Any) {
+        if (current.value?.owner === owner) current.value = null
+    }
+}
+
+@Composable
+internal fun CarAlertOverlay(modifier: Modifier = Modifier) {
+    val current by CarAlerts.shown.collectAsState()
+    val shown = current ?: return
+    val alert = shown.alert
+    val timed = alert.durationMillis in 1 until Alert.DURATION_SHOW_INDEFINITELY
+    // What's left of the alert's time, drawn as the bar along its foot.
+    val left = remember(shown) { Animatable(1f) }
+    LaunchedEffect(shown) {
+        if (!timed) return@LaunchedEffect
+        left.animateTo(0f, tween(alert.durationMillis.coerceAtMost(Int.MAX_VALUE.toLong()).toInt(), easing = LinearEasing))
+        CarAlerts.cancelled(shown, AlertCallback.REASON_TIMEOUT)
+    }
+    val scheme = MaterialTheme.colorScheme
+    val dark = scheme.surface.luminanceIsDark()
+    Surface(
+        modifier
+            .padding(horizontal = 24.dp, vertical = 16.dp)
+            .widthIn(max = 640.dp)
+            .fillMaxWidth()
+            .semantics { liveRegion = LiveRegionMode.Polite },
+        shape = RoundedCornerShape(24.dp),
+        color = scheme.surfaceContainerHigh,
+        shadowElevation = 8.dp,
+    ) {
+        Column {
+            Row(Modifier.padding(start = 20.dp, end = 12.dp, top = 16.dp), verticalAlignment = Alignment.CenterVertically) {
+                if (alert.icon != null) {
+                    CarGlyph(alert.icon, Modifier.size(40.dp))
+                    Spacer(Modifier.width(16.dp))
+                }
+                Column(Modifier.weight(1f)) {
+                    Text(
+                        alert.title.text(),
+                        style = MaterialTheme.typography.titleLarge,
+                        fontWeight = FontWeight.Bold,
+                        maxLines = 2,
+                        overflow = TextOverflow.Ellipsis,
+                    )
+                    alert.subtitle?.text()?.takeIf { it.isNotEmpty() }?.let {
+                        Text(
+                            it,
+                            style = MaterialTheme.typography.titleMedium,
+                            color = scheme.onSurfaceVariant,
+                            maxLines = 2,
+                            overflow = TextOverflow.Ellipsis,
+                        )
+                    }
+                }
+                // With no timer and no buttons, nothing else would ever take it away.
+                if (!timed || alert.actions.isEmpty()) {
+                    GsIconBox(
+                        onClick = { CarAlerts.cancelled(shown, AlertCallback.REASON_USER_ACTION) },
+                        modifier = Modifier.size(56.dp),
+                        colors = GsColors(Color.Transparent, scheme.onSurface),
+                        shape = CircleShape,
+                    ) {
+                        Icon(Icons.Filled.Close, contentDescription = stringResource(R.string.close))
+                    }
+                }
+            }
+            if (alert.actions.isNotEmpty()) {
+                Row(
+                    Modifier.fillMaxWidth().padding(horizontal = 20.dp, vertical = 16.dp),
+                    horizontalArrangement = Arrangement.spacedBy(12.dp),
+                ) {
+                    alert.actions.take(2).forEach { action ->
+                        val custom = action.backgroundColor?.type?.let { it != androidx.car.app.model.CarColor.TYPE_DEFAULT } == true
+                        GsIconBox(
+                            onClick = { CarAlerts.tapped(shown, action) },
+                            modifier = Modifier.weight(1f).height(64.dp),
+                            colors = GsColors(
+                                action.backgroundColor.color(dark, scheme.surfaceContainerHighest),
+                                if (custom) Color.White else scheme.onSurface,
+                            ),
+                            enabled = action.isEnabled,
+                        ) {
+                            Row(verticalAlignment = Alignment.CenterVertically) {
+                                if (action.icon != null) {
+                                    CarGlyph(action.icon, Modifier.size(28.dp))
+                                    Spacer(Modifier.width(8.dp))
+                                }
+                                Text(action.title.text(), style = MaterialTheme.typography.titleMedium, maxLines = 1, overflow = TextOverflow.Ellipsis)
+                            }
+                        }
+                    }
+                }
+            } else {
+                Spacer(Modifier.height(16.dp))
+            }
+            if (timed) {
+                Box(Modifier.fillMaxWidth().height(4.dp).background(scheme.surfaceContainerHighest)) {
+                    Box(Modifier.fillMaxWidth(left.value).height(4.dp).clip(RoundedCornerShape(2.dp)).background(scheme.primary))
+                }
+            }
+        }
+    }
+}

gearslip/src/main/java/app/seb3thehacker/gearslip/car/CarAppStage.kt

@@ -1,5 +1,7 @@
 package app.seb3thehacker.gearslip.car
 
+import androidx.compose.ui.res.stringResource
+import app.seb3thehacker.gearslip.R
 import app.seb3thehacker.gearslip.car.theme.*
 import android.view.SurfaceHolder
 import android.view.SurfaceView
@@ -11,6 +13,8 @@ import androidx.compose.ui.input.pointer.PointerEventPass
 import androidx.compose.ui.input.pointer.util.VelocityTracker
 import kotlin.math.hypot
 import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.fillMaxHeight
+import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.fillMaxSize
@@ -73,10 +77,28 @@ fun CarAppStage(
             if (status.surfaceRequested) {
                 AppSurface(connection, frame, template, Modifier.fillMaxSize())
             }
+            // The docked player floats over one side of the map: the chrome keeps clear of it,
+            // and the app hears that side is covered, so its map centres in the rest.
+            val panel = LocalSidePanelInset.current
+            val panelAtStart = LocalCardsAtEnd.current
             TemplateChrome(
                 template,
-                Modifier.fillMaxSize().padding(top = if (embedded) 0.dp else CHROME_BAR, bottom = navBar),
+                Modifier.fillMaxSize().padding(
+                    top = if (embedded) 0.dp else CHROME_BAR,
+                    bottom = navBar,
+                    start = if (panelAtStart) panel else 0.dp,
+                    end = if (panelAtStart) 0.dp else panel,
+                ),
             )
+            if (panel > 0.dp) {
+                Box(
+                    Modifier
+                        .align(if (panelAtStart) Alignment.CenterStart else Alignment.CenterEnd)
+                        .fillMaxHeight()
+                        .width(panel)
+                        .covers("side-panel", if (panelAtStart) CoverEdge.START else CoverEdge.END),
+                )
+            }
             BottomCover(navBar, Modifier.align(Alignment.BottomCenter))
         }
         if (!embedded) ChromeBar(status, onDisconnect, Modifier.align(Alignment.TopCenter))
@@ -106,12 +128,16 @@ private fun AppSurface(
     val measured = bounds?.takeIf { width > 0 && height > 0 }?.let { cover?.visibleWithin(it, width, height) }
     // The card column moves the map's centre but isn't taken out of the stable area: apps size
     // their own overlays from it, and Vela's speedometer shrank to fit the strip right of the cards.
-    val measuredStable = bounds?.takeIf { width > 0 && height > 0 }?.let { cover?.visibleWithin(it, width, height, skip = CoverEdge.START) }
-    LaunchedEffect(template, size, measured, measuredStable) {
+    val cardsAtEnd = LocalCardsAtEnd.current
+    val cardEdge = cardEdge
+    val measuredStable = bounds?.takeIf { width > 0 && height > 0 }?.let { cover?.visibleWithin(it, width, height, skip = cardEdge) }
+    LaunchedEffect(template, size, measured, measuredStable, cardsAtEnd) {
         if (width > 0 && height > 0) {
-            val visible = visibleAreaFor(template, width, height, measured)
-            val stable = if (!isContentTemplate(template)) {
-                visibleAreaFor(template, width, height, measuredStable)
+            val visible = visibleAreaFor(template, width, height, measured, cardsAtEnd)
+            // Waze seems to centre its car in the stable area rather than the visible one, so it
+            // gets the cards taken out of that too. Test: see whether its car moves out from under them.
+            val stable = if (!isContentTemplate(template) && connection.appPackage != "com.waze") {
+                visibleAreaFor(template, width, height, measuredStable, cardsAtEnd)
             } else {
                 visible
             }
@@ -227,14 +253,14 @@ private fun ChromeBar(
             verticalAlignment = Alignment.CenterVertically,
         ) {
             Text(
-                status.app ?: "Car app",
+                status.app ?: stringResource(R.string.stage_car_app),
                 style = MaterialTheme.typography.titleSmall,
                 fontWeight = FontWeight.SemiBold,
                 modifier = Modifier.weight(1f),
             )
             GsIconButton(
                 androidx.compose.material.icons.Icons.Filled.Close,
-                "Close ${status.app ?: "the app"}",
+                status.app?.let { stringResource(R.string.stage_close, it) } ?: stringResource(R.string.stage_close_app),
                 onDisconnect,
                 size = 36.dp,
                 iconSize = 20.dp,

gearslip/src/main/java/app/seb3thehacker/gearslip/car/CarApps.kt

@@ -1,6 +1,9 @@
 package app.seb3thehacker.gearslip.car
 
+import androidx.annotation.StringRes
+import app.seb3thehacker.gearslip.R
 import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.List
 import androidx.compose.material.icons.filled.Call
 import androidx.compose.material.icons.filled.Search
 import androidx.compose.material.icons.filled.Share
@@ -13,7 +16,9 @@ import app.seb3thehacker.gearslip.ProjectedContent
 /** One tile in the launcher and the screen it opens. */
 class CarApp(
     val id: String,
+    /** English, for matching what a driver says; [labelRes] is what the screen shows. */
     val label: String,
+    @param:StringRes val labelRes: Int,
     val icon: ImageVector,
     val content: @Composable () -> Unit,
 )
@@ -22,19 +27,28 @@ class CarApp(
 object CarApps {
 
     val all: List<CarApp> = listOf(
-        CarApp("web", "Browser", Icons.Filled.Search) {
+        CarApp("web", "Browser", R.string.app_browser, Icons.Filled.Search) {
             WebApp(content = ProjectedContent.resolve(LocalContext.current))
         },
-        CarApp("phone", "Screen sharing", Icons.Filled.Share) {
+        CarApp("phone", "Screen sharing", R.string.app_screen_sharing, Icons.Filled.Share) {
             PhoneAppsScreen()
         },
-        CarApp("dialer", "Phone", Icons.Filled.Call) {
+        CarApp("dialer", "Phone", R.string.carset_phone, Icons.Filled.Call) {
             PhoneDialerScreen()
         },
-        CarApp("settings", "Settings", Icons.Filled.Settings) {
+        CarApp("settings", "Settings", R.string.settings_title, Icons.Filled.Settings) {
             CarSettingsScreen()
         },
+        CarApp("allapps", "All apps", R.string.app_all_apps, Icons.Filled.List) {
+            AllAppsScreen()
+        },
     )
 
     fun find(id: String): CarApp? = all.firstOrNull { it.id == id }
+
+    /** The screens [BuiltInApps.entries] offers here, so a choice list never names a hidden one. */
+    fun shown(launcher: Boolean, canCall: Boolean): List<CarApp> {
+        val ids = BuiltInApps.entries(launcher, canCall).mapNotNull { (it.builtIn?.screen as? CarScreen.App)?.id }.toSet()
+        return all.filter { it.id in ids }
+    }
 }

gearslip/src/main/java/app/seb3thehacker/gearslip/car/CarBluetooth.kt

@@ -1,5 +1,7 @@
 package app.seb3thehacker.gearslip.car
 
+import androidx.annotation.StringRes
+import app.seb3thehacker.gearslip.R
 import android.Manifest
 import android.annotation.SuppressLint
 import android.bluetooth.BluetoothAdapter
@@ -38,6 +40,11 @@ import java.security.MessageDigest
  * phone's own Bluetooth address (apps get a placeholder), and confirming the pairing code without
  * asking. So a car may turn the request down, and the phone always shows its pairing dialog. The
  * channel stays closed unless the driver taps Pair: every new channel is a risk to cars that work.
+ *
+ * The one exception is a driver who typed the phone's real address into Settings. A VW MIB2 drops
+ * an already paired phone's Bluetooth when it connects over USB, because nothing tells it the two
+ * are the same phone (issue #28). With the address, Gearslip opens the channel on every connection
+ * and sends the same request, which is how Android Auto says so.
  */
 object CarBluetooth {
 
@@ -61,13 +68,15 @@ object CarBluetooth {
     @Volatile private var bondStarted = false
     /** From the Pair tap until it succeeds or fails, whether or not the card still shows. */
     @Volatile private var pairing = false
+    /** Already paired: the channel is open only to tell the car which phone this is. */
+    @Volatile private var announcing = false
     private var receiver: BroadcastReceiver? = null
 
     /** The car's Bluetooth address, when it named one in its service list. */
     val carAddress: String? get() = car?.service?.carAddress
 
     /** The car's Bluetooth channel once the driver has asked to pair, -1 otherwise. */
-    val channelId: Int get() = car?.takeIf { pairing }?.service?.serviceId ?: -1
+    val channelId: Int get() = car?.takeIf { pairing || announcing }?.service?.serviceId ?: -1
 
     fun init(context: Context) {
         appContext = context.applicationContext
@@ -81,18 +90,39 @@ object CarBluetooth {
     ) {
         car = Car(service, open, send)
         bondStarted = false
+        announcing = false
         log.i("the car offers Bluetooth pairing, methods=${service.pairingMethods}")
         val device = device() ?: return
         when {
+            device.bondState == BluetoothDevice.BOND_BONDED && typedAddress() != null -> {
+                log.i("already paired with this car - telling it which phone this is")
+                announcing = true
+                open()
+            }
             device.bondState == BluetoothDevice.BOND_BONDED -> log.i("already paired with this car")
             declined(service.carAddress) -> log.i("not paired, and the driver said not now for this car")
             else -> _prompt.value = Prompt.ASK
         }
     }
 
+    /**
+     * Opens the car's Bluetooth channel though there's no pairing to do, as a real phone does on
+     * every connection. Issue #18: a 2021 Bolt hangs up about 20 seconds in, and this is one of
+     * the two channels it offers that Gearslip never opened. Without an address the driver typed,
+     * it only opens the channel: a made-up address could set the car pairing with the wrong phone.
+     */
+    fun announce(why: String) {
+        val c = car ?: return
+        if (pairing || announcing) return
+        announcing = true
+        log.i("-> ChannelOpenRequest on channel ${c.service.serviceId} ($why)")
+        c.open()
+    }
+
     fun onCarDisconnected() {
         car = null
         pairing = false
+        announcing = false
         main.post {
             stopWatching()
             _prompt.value = Prompt.NONE
@@ -111,7 +141,7 @@ object CarBluetooth {
         // If the car never answers on its channel, pair from the phone anyway.
         main.postDelayed({ startBond("the car didn't answer the pairing request") }, CAR_REPLY_WAIT_MS)
         main.postDelayed({
-            if (pairing) finish("Pairing didn't finish. Pair from the car's Bluetooth menu instead.")
+            if (pairing) finish(R.string.bt_pair_unfinished)
         }, GIVE_UP_MS)
     }
 
@@ -137,7 +167,12 @@ object CarBluetooth {
                 val status = Protobuf.readInt32Field(body, 1) ?: 0
                 log.i("<- ChannelOpenResponse: status=$status")
                 if (status != 0) {
-                    main.post { startBond("the car wouldn't open its Bluetooth channel") }
+                    if (announcing) log.i("the car wouldn't open its Bluetooth channel")
+                    else main.post { startBond("the car wouldn't open its Bluetooth channel") }
+                    return
+                }
+                if (announcing && typedAddress() == null) {
+                    log.i("Bluetooth channel open; no address typed in Settings, so no PairingRequest")
                     return
                 }
                 val method = c.service.pairingMethods.firstOrNull { it == METHOD_NUMERIC_COMPARISON }
@@ -151,6 +186,7 @@ object CarBluetooth {
             MSG_PAIRING_RESPONSE -> {
                 val fields = Wire.fields(body)
                 log.i("<- PairingResponse status=${Wire.varint(fields, 1)} already_paired=${Wire.varint(fields, 2) == 1L}")
+                if (!pairing) return
                 // Some cars start pairing themselves once they answer; give them a moment first.
                 main.postDelayed({ startBond("the car answered") }, CAR_BOND_WAIT_MS)
             }
@@ -168,7 +204,7 @@ object CarBluetooth {
         bondStarted = true
         val started = runCatching { device.createBond() }.getOrDefault(false)
         log.i("pairing from the phone ($why): ${if (started) "started" else "refused"}")
-        if (!started) finish("Pairing didn't start. Pair from the car's Bluetooth menu instead.")
+        if (!started) finish(R.string.bt_pair_not_started)
     }
 
     private fun watchBonding(device: BluetoothDevice) {
@@ -184,8 +220,8 @@ object CarBluetooth {
                 log.i("bond state $previous -> $state")
                 when {
                     state == BluetoothDevice.BOND_BONDING -> bondStarted = true
-                    state == BluetoothDevice.BOND_BONDED -> finish("Paired. Calls now play through the car.")
-                    previous == BluetoothDevice.BOND_BONDING -> finish("Pairing didn't finish. Pair from the car's Bluetooth menu instead.")
+                    state == BluetoothDevice.BOND_BONDED -> finish(R.string.bt_paired)
+                    previous == BluetoothDevice.BOND_BONDING -> finish(R.string.bt_pair_unfinished)
                 }
             }
         }
@@ -193,12 +229,12 @@ object CarBluetooth {
         receiver = r
     }
 
-    private fun finish(message: String) {
+    private fun finish(@StringRes message: Int) {
         pairing = false
         stopWatching()
         main.removeCallbacksAndMessages(null)
         _prompt.value = Prompt.NONE
-        CarToasts.show(this, message, CarToast.LENGTH_LONG)
+        CarToasts.show(this, appContext?.getString(message) ?: return, CarToast.LENGTH_LONG)
     }
 
     private fun stopWatching() {
@@ -227,12 +263,30 @@ object CarBluetooth {
         return adapter.getRemoteDevice(address)
     }
 
-    /** Apps get 02:00:00:00:00:00 here, not the real address. Sent anyway, as the field is required. */
+    /**
+     * Apps get 02:00:00:00:00:00 here, not the real address, so the one the driver typed in wins.
+     * Sent either way, as the field is required. Never logged: it identifies the phone.
+     */
     @SuppressLint("MissingPermission", "HardwareIds")
     private fun phoneAddress(): String =
-        runCatching { appContext?.getSystemService(BluetoothManager::class.java)?.adapter?.address }.getOrNull()
+        typedAddress()
+            ?: runCatching { appContext?.getSystemService(BluetoothManager::class.java)?.adapter?.address }.getOrNull()
             ?: "02:00:00:00:00:00"
 
+    private fun typedAddress(): String? = appContext?.let { typedAddress(it) }
+
+    /** The phone's own address as the driver typed it in Settings, or null. */
+    fun typedAddress(context: Context): String? =
+        AppSettings.getString(context, KEY_PHONE_ADDRESS, "").takeIf { BluetoothAdapter.checkBluetoothAddress(it) }
+
+    /** Saves [address] after tidying it up; false when it isn't one. Empty clears it. */
+    fun setTypedAddress(context: Context, address: String): Boolean {
+        val tidy = address.trim().uppercase().replace('-', ':')
+        if (tidy.isNotEmpty() && !BluetoothAdapter.checkBluetoothAddress(tidy)) return false
+        AppSettings.putString(context, KEY_PHONE_ADDRESS, tidy)
+        return true
+    }
+
     private fun declined(address: String): Boolean {
         val context = appContext ?: return false
         return hash(address) in AppSettings.getString(context, KEY_DECLINED, "").split(",")
@@ -244,6 +298,7 @@ object CarBluetooth {
             .take(8).joinToString("") { "%02x".format(it) }
 
     private const val KEY_DECLINED = "bluetooth_pair_declined"
+    private const val KEY_PHONE_ADDRESS = "phone_bluetooth_address"
     private const val CAR_REPLY_WAIT_MS = 5_000L
     private const val CAR_BOND_WAIT_MS = 3_000L
     private const val GIVE_UP_MS = 90_000L

gearslip/src/main/java/app/seb3thehacker/gearslip/car/CarDashboardScreen.kt

@@ -1,5 +1,7 @@
 package app.seb3thehacker.gearslip.car
 
+import androidx.compose.ui.res.stringResource
+import app.seb3thehacker.gearslip.R
 import android.Manifest
 import android.content.Context
 import android.content.pm.PackageManager
@@ -60,7 +62,7 @@ fun CarDashboardScreen() {
             .padding(horizontal = 24.dp, vertical = 16.dp),
         verticalArrangement = Arrangement.spacedBy(24.dp),
     ) {
-        ScreenHeader("Today")
+        ScreenHeader(stringResource(R.string.dash_today))
         WeatherCard(context)
         AgendaCard(context)
         NotificationsSection()
@@ -84,9 +86,9 @@ private fun WeatherCard(context: Context) {
             horizontalArrangement = Arrangement.spacedBy(16.dp),
         ) {
             when (val s = state) {
-                WeatherState.Loading -> Text("Getting weather…", style = MaterialTheme.typography.bodyLarge)
+                WeatherState.Loading -> Text(stringResource(R.string.dash_getting_weather), style = MaterialTheme.typography.bodyLarge)
                 is WeatherState.Unavailable -> Text(
-                    s.reason, style = MaterialTheme.typography.bodyLarge,
+                    stringResource(s.reason), style = MaterialTheme.typography.bodyLarge,
                     color = MaterialTheme.colorScheme.onSurfaceVariant,
                 )
                 is WeatherState.Ready -> {
@@ -94,7 +96,7 @@ private fun WeatherCard(context: Context) {
                     WeatherIcon(w.code, w.isDay, size = 44.dp)
                     Column {
                         Text(
-                            "${w.temp}${w.tempUnit}  ·  ${Weather.describe(w.code)}",
+                            "${w.temp}${w.tempUnit}  ·  ${Weather.condition(w.code)}",
                             style = MaterialTheme.typography.titleLarge, fontWeight = FontWeight.SemiBold,
                         )
                         Text(w.place, style = MaterialTheme.typography.bodyMedium, color = MaterialTheme.colorScheme.onSurfaceVariant)
@@ -112,12 +114,12 @@ private fun AgendaCard(context: Context) {
     }
 
     Column(verticalArrangement = Arrangement.spacedBy(12.dp)) {
-        Text("Coming up", style = MaterialTheme.typography.titleMedium, color = MaterialTheme.colorScheme.primary)
+        Text(stringResource(R.string.dash_coming_up), style = MaterialTheme.typography.titleMedium, color = MaterialTheme.colorScheme.primary)
         val list = events
         when {
-            list == null -> Text("Loading calendar…", style = MaterialTheme.typography.bodyMedium)
+            list == null -> Text(stringResource(R.string.dash_loading_calendar), style = MaterialTheme.typography.bodyMedium)
             list.isEmpty() -> Text(
-                "Nothing in the next week.",
+                stringResource(R.string.dash_nothing_week),
                 style = MaterialTheme.typography.bodyMedium,
                 color = MaterialTheme.colorScheme.onSurfaceVariant,
             )
@@ -135,7 +137,7 @@ private fun EventRow(event: AgendaEvent) {
             verticalAlignment = Alignment.CenterVertically,
         ) {
             Text(
-                eventWhen(event),
+                eventWhen(event, stringResource(R.string.dash_all_day)),
                 style = MaterialTheme.typography.bodyLarge,
                 fontWeight = FontWeight.SemiBold,
             )
@@ -149,14 +151,14 @@ private fun EventRow(event: AgendaEvent) {
     }
 }
 
-/** "Today" events show just a time; later days get a weekday so a week's list stays readable. */
-private fun eventWhen(event: AgendaEvent): String {
+/** stringResource(R.string.dash_today) events show just a time; later days get a weekday so a week's list stays readable. */
+private fun eventWhen(event: AgendaEvent, allDay: String): String {
     val zone = if (event.allDay) TimeZone.getTimeZone("UTC") else TimeZone.getDefault()
     val start = Calendar.getInstance(zone).apply { timeInMillis = event.startMillis }
     val today = Calendar.getInstance()
     val sameDay = start.get(Calendar.YEAR) == today.get(Calendar.YEAR) &&
         start.get(Calendar.DAY_OF_YEAR) == today.get(Calendar.DAY_OF_YEAR)
-    val time = if (event.allDay) "All day" else DateFormat.getTimeInstance(DateFormat.SHORT).format(Date(event.startMillis))
+    val time = if (event.allDay) allDay else DateFormat.getTimeInstance(DateFormat.SHORT).format(Date(event.startMillis))
     if (sameDay || (event.allDay && start.before(today))) return time
     return SimpleDateFormat("EEE", Locale.getDefault()).apply { timeZone = zone }.format(Date(event.startMillis)) + " " + time
 }

gearslip/src/main/java/app/seb3thehacker/gearslip/car/CarData.kt

@@ -0,0 +1,110 @@
+package app.seb3thehacker.gearslip.car
+
+import app.seb3thehacker.gearslip.Wire
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+
+/**
+ * The car's sensors, read into real values for the car apps that ask (a map's speed, an EV app's
+ * range). [CarSensors] keeps the raw readings for the Vehicle data screen; this keeps the few with
+ * a known meaning, decoded the way Android Auto's SensorBatch scales them:
+ *
+ *   gps_location = 1 { latitude_e7 = 2; longitude_e7 = 3; accuracy_e3 = 4; altitude_e2 = 5;
+ *                      speed_e3 = 6; bearing_e6 = 7 }
+ *   compass = 2 { bearing_e6 = 1 }      speed = 3 { speed_e3 = 1 }  (metres per second)
+ *   odometer = 5 { kms_e1 = 1 }         fuel = 6 { level = 1 (percent); range = 2 (km); low = 3 }
+ *
+ * Each value is null until the car first sends it, and the whole lot clears when it disconnects.
+ */
+object CarData {
+
+    class Location(
+        val latitude: Double,
+        val longitude: Double,
+        val accuracyMeters: Float?,
+        val altitudeMeters: Double?,
+        val speedMps: Float?,
+        val bearingDegrees: Float?,
+    )
+
+    data class Snapshot(
+        val speedMps: Float? = null,
+        val odometerKm: Float? = null,
+        val fuelPercent: Int? = null,
+        val rangeKm: Int? = null,
+        val fuelLow: Boolean? = null,
+        val compassDegrees: Float? = null,
+        val location: Location? = null,
+        /** When each kind last changed, by its SensorBatch field number. */
+        val updatedAt: Map<Int, Long> = emptyMap(),
+    )
+
+    /** What the car says it is, from its service discovery: model and year. It names no maker. */
+    class Model(val name: String, val year: Int?)
+
+    private val flow = MutableStateFlow(Snapshot())
+    val state: StateFlow<Snapshot> = flow
+
+    @Volatile var model: Model? = null
+        private set
+
+    fun onModel(name: String, year: String) {
+        model = name.takeIf { it.isNotBlank() }?.let { Model(it, year.toIntOrNull()?.takeIf { y -> y > 0 }) }
+    }
+
+    fun onEvent(body: ByteArray) {
+        val now = System.currentTimeMillis()
+        val batch = Wire.fields(body)
+        var s = flow.value
+        val touched = HashSet<Int>()
+        // Each kind may come several times in one batch: the last is the newest.
+        Wire.allBytes(batch, LOCATION).lastOrNull()?.let { bytes ->
+            val f = Wire.fields(bytes)
+            val lat = Wire.varint(f, 2)?.toInt()
+            val lon = Wire.varint(f, 3)?.toInt()
+            if (lat != null && lon != null) {
+                s = s.copy(
+                    location = Location(
+                        lat / 1e7, lon / 1e7,
+                        Wire.varint(f, 4)?.let { it / 1e3f },
+                        Wire.varint(f, 5)?.let { it.toInt() / 1e2 },
+                        Wire.varint(f, 6)?.let { it.toInt() / 1e3f },
+                        Wire.varint(f, 7)?.let { it.toInt() / 1e6f },
+                    ),
+                )
+                touched += LOCATION
+            }
+        }
+        Wire.allBytes(batch, COMPASS).lastOrNull()?.let { bytes ->
+            Wire.varint(Wire.fields(bytes), 1)?.let { s = s.copy(compassDegrees = it.toInt() / 1e6f); touched += COMPASS }
+        }
+        Wire.allBytes(batch, SPEED).lastOrNull()?.let { bytes ->
+            Wire.varint(Wire.fields(bytes), 1)?.let { s = s.copy(speedMps = it.toInt() / 1e3f); touched += SPEED }
+        }
+        Wire.allBytes(batch, ODOMETER).lastOrNull()?.let { bytes ->
+            Wire.varint(Wire.fields(bytes), 1)?.let { s = s.copy(odometerKm = it.toInt() / 10f); touched += ODOMETER }
+        }
+        Wire.allBytes(batch, FUEL).lastOrNull()?.let { bytes ->
+            val f = Wire.fields(bytes)
+            s = s.copy(
+                fuelPercent = Wire.varint(f, 1)?.toInt() ?: s.fuelPercent,
+                rangeKm = Wire.varint(f, 2)?.toInt() ?: s.rangeKm,
+                fuelLow = Wire.varint(f, 3)?.let { it != 0L } ?: s.fuelLow,
+            )
+            touched += FUEL
+        }
+        if (touched.isEmpty()) return
+        flow.value = s.copy(updatedAt = s.updatedAt + touched.associateWith { now })
+    }
+
+    fun clear() {
+        flow.value = Snapshot()
+        model = null
+    }
+
+    const val LOCATION = 1
+    const val COMPASS = 2
+    const val SPEED = 3
+    const val ODOMETER = 5
+    const val FUEL = 6
+}

gearslip/src/main/java/app/seb3thehacker/gearslip/car/CarEnvironment.kt

@@ -37,6 +37,9 @@ object CarEnvironment {
     private val frameFlow = MutableStateFlow(Frame(800, 480, 160))
     val frame: StateFlow<Frame> = frameFlow
 
+    /** The density the car reported; [frame] carries the one the car UI and its apps draw at. */
+    private var carDensityDpi = 160
+
     val phoneDark: StateFlow<Boolean> = phoneDarkFlow
     val darkOutside: StateFlow<Boolean> = darkOutsideFlow
     val battery: StateFlow<Battery> = batteryFlow
@@ -64,7 +67,9 @@ object CarEnvironment {
     }
 
     @Volatile private var sensorNight: Boolean? = null
-    private var appContext: Context? = null
+    /** Set once the car UI starts; the cluster screen draws with it too. */
+    var appContext: Context? = null
+        private set
     private var running = false
 
     private val handler = Handler(Looper.getMainLooper())
@@ -93,8 +98,18 @@ object CarEnvironment {
     }
 
     fun setDisplay(width: Int, height: Int, densityDpi: Int) {
-        displayFlow.value = "${width}x$height @ ${densityDpi}dpi"
-        frameFlow.value = Frame(width, height, densityDpi)
+        carDensityDpi = densityDpi
+        val dpi = CarSettings.effectiveDensity(densityDpi)
+        displayFlow.value = "${width}x$height @ ${dpi}dpi"
+        frameFlow.value = Frame(width, height, dpi)
+    }
+
+    /**
+     * Takes up the density setting. It's read only as a session starts, so the display and the
+     * apps on it can't disagree mid-drive; a session with no car behind it, the preview, asks here.
+     */
+    fun applyDensity() {
+        frameFlow.value = frameFlow.value.copy(densityDpi = CarSettings.effectiveDensity(carDensityDpi))
     }
 
     fun start(context: Context) {

gearslip/src/main/java/app/seb3thehacker/gearslip/car/CarHomeScreen.kt

@@ -1,5 +1,6 @@
 package app.seb3thehacker.gearslip.car
 
+import androidx.compose.ui.res.stringResource
 import app.seb3thehacker.gearslip.car.theme.*
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
@@ -12,6 +13,8 @@ import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.width
+import app.seb3thehacker.gearslip.car.theme.gsPanelShadow
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.Close
 import androidx.compose.material.icons.filled.PlayArrow
@@ -64,7 +67,9 @@ import app.seb3thehacker.gearslip.media.NowPlaying
 import kotlinx.coroutines.launch
 
 /**
- * The home screen: the map on the left, the docked player on the right when asked for.
+ * The home screen: the map, with the docked player floating over one side of it when asked for.
+ * With the player on the left, the map app's cards move to the map's far edge, so the player, the
+ * map and the cards each keep their own space.
  *
  * The map is whatever navigation app was used last, brought back on its own. The player sits in
  * the nav bar's pill until its dock button moves it here; the column closes itself back to a
@@ -94,26 +99,56 @@ fun CarHome() {
     }
     val splitScreen = phase == CarMedia.Phase.READY && now.isActive && panel != SidePanel.NONE
     val playerLeft by CarSettings.playerLeft.collectAsStateWithLifecycle()
+    // What the card showed last, so it still has something to show while it slides away.
+    val shown = remember { androidx.compose.runtime.mutableStateOf(SidePanel.CONTROLS) }
+    if (panel != SidePanel.NONE) shown.value = panel
 
-    // No padding anywhere, split screen or not: the player sits flush against the map.
-    Row(Modifier.fillMaxSize()) {
-        val side = Modifier.weight(1f).fillMaxHeight().padding(bottom = LocalNavBarInset.current)
-        if (splitScreen && playerLeft) {
-            if (panel == SidePanel.LYRICS) SideLyrics(now, side) else DockedPlayer(now, side)
-        }
-        Box(
-            Modifier
-                .weight(if (splitScreen) 2.1f else 1f)
-                .fillMaxHeight(),
+    // The map runs edge to edge underneath; the player floats over one side of it as a card, with
+    // a gap all round. The map's surface keeps its size when the card comes and goes, so the app
+    // only re-centres its map instead of drawing onto a new surface.
+    BoxWithConstraints(Modifier.fillMaxSize()) {
+        val column = (maxWidth / PLAYER_SHARE).coerceIn(PLAYER_MIN_WIDTH, PLAYER_MAX_WIDTH)
+        androidx.compose.runtime.CompositionLocalProvider(
+            LocalCardsAtEnd provides (splitScreen && playerLeft),
+            LocalSidePanelInset provides if (splitScreen) column else 0.dp,
         ) {
             MapPane(navStatus, frame)
         }
-        if (splitScreen && !playerLeft) {
-            if (panel == SidePanel.LYRICS) SideLyrics(now, side) else DockedPlayer(now, side)
+        androidx.compose.animation.AnimatedVisibility(
+            splitScreen,
+            Modifier.align(if (playerLeft) Alignment.CenterStart else Alignment.CenterEnd),
+            enter = androidx.compose.animation.slideInHorizontally(tween(220)) { if (playerLeft) -it / 3 else it / 3 } +
+                androidx.compose.animation.fadeIn(tween(180)),
+            exit = androidx.compose.animation.slideOutHorizontally(tween(180)) { if (playerLeft) -it / 3 else it / 3 } +
+                androidx.compose.animation.fadeOut(tween(140)),
+        ) {
+            val card = Modifier
+                .width(column)
+                .fillMaxHeight()
+                .padding(
+                    start = if (playerLeft) CARD_GAP else 0.dp,
+                    end = if (playerLeft) 0.dp else CARD_GAP,
+                    top = CARD_GAP,
+                    bottom = LocalNavBarInset.current + CARD_GAP,
+                )
+            if (shown.value == SidePanel.LYRICS) SideLyrics(now, card) else DockedPlayer(now, card)
         }
     }
 }
 
+/** The player takes one part in this many of the screen's width. */
+private const val PLAYER_SHARE = 3.6f
+
+/** Narrow enough to leave the map most of a small screen; on a wide one the map gets the extra room. */
+private val PLAYER_MIN_WIDTH = 240.dp
+private val PLAYER_MAX_WIDTH = 340.dp
+
+/** Between the player card and the screen's edges, and the map's own cards beside it. */
+private val CARD_GAP = 12.dp
+
+/** The card's corners: rounder than a button's, as the map app's own cards are. */
+private val CARD_SHAPE = RoundedCornerShape(24.dp)
+
 @Composable
 private fun MapPane(status: CarAppConnection.Status, frame: CarEnvironment.Frame) {
     val navigator = LocalCarNavigator.current
@@ -123,8 +158,11 @@ private fun MapPane(status: CarAppConnection.Status, frame: CarEnvironment.Frame
     }
 
     Column(
-        Modifier.fillMaxSize().padding(24.dp),
-        verticalArrangement = Arrangement.Center,
+        Modifier.fillMaxSize().padding(
+            start = if (LocalCardsAtEnd.current) LocalSidePanelInset.current else 0.dp,
+            end = if (LocalCardsAtEnd.current) 0.dp else LocalSidePanelInset.current,
+        ).padding(24.dp),
+        verticalArrangement = Arrangement.spacedBy(10.dp, Alignment.CenterVertically),
         horizontalAlignment = Alignment.CenterHorizontally,
     ) {
         val hasLast = CarSettings.lastNav.value != null
@@ -132,18 +170,19 @@ private fun MapPane(status: CarAppConnection.Status, frame: CarEnvironment.Frame
         val scope = androidx.compose.runtime.rememberCoroutineScope()
         when (status.phase) {
             CarAppConnection.Phase.BINDING, CarAppConnection.Phase.HANDSHAKE ->
-                Text("Starting ${status.app ?: "the map"}…", style = MaterialTheme.typography.titleMedium)
+                Text(status.app?.let { stringResource(R.string.home_starting, it) } ?: stringResource(R.string.home_starting_map), style = MaterialTheme.typography.titleMedium)
             CarAppConnection.Phase.REJECTED, CarAppConnection.Phase.FAILED -> {
-                Text("${status.app ?: "The map app"} would not start.", style = MaterialTheme.typography.titleMedium)
+                Text(status.app?.let { stringResource(R.string.home_failed, it) } ?: stringResource(R.string.home_failed_map), style = MaterialTheme.typography.titleMedium)
                 status.detail?.let { Text(it, style = MaterialTheme.typography.bodyMedium, color = MaterialTheme.colorScheme.onSurfaceVariant) }
-                GsButton(onClick = navigator::apps, tone = GsTone.Tonal) { Text("Choose another app") }
+                Spacer(Modifier.height(8.dp))
+                StatusButton(stringResource(R.string.home_choose_app), GsTone.Primary, navigator::apps)
             }
             else -> if (!hasNavApps) {
                 // Nothing to auto-select and nothing to pick from Car apps either - this is the
                 // only case worth a distinct screen, since every other IDLE case resolves itself.
-                Text("No mapping apps found.", style = MaterialTheme.typography.titleMedium)
+                Text(stringResource(R.string.home_no_maps), style = MaterialTheme.typography.titleMedium)
                 Text(
-                    "Install a navigation app that supports Android Auto and it will start here on its own.",
+                    stringResource(R.string.home_no_maps_body),
                     style = MaterialTheme.typography.bodyMedium,
                     color = MaterialTheme.colorScheme.onSurfaceVariant,
                 )
@@ -151,9 +190,18 @@ private fun MapPane(status: CarAppConnection.Status, frame: CarEnvironment.Frame
                 // IDLE with a last app on record means the driver stopped it themselves - it will
                 // not come back on its own, so the screen must offer a way to bring it back rather
                 // than sit on a "starting" message that never resolves.
-                Text("Map stopped.", style = MaterialTheme.typography.titleMedium)
-                GsButton(onClick = { scope.launch { CarServices.reconnectNav(frame) } }, tone = GsTone.Tonal) { Text("Reopen") }
-                GsButton(onClick = { navigator.apps() }, tone = GsTone.Tonal) { Text("Car apps") }
+                Text(stringResource(R.string.home_map_stopped), style = MaterialTheme.typography.headlineSmall, fontWeight = FontWeight.Bold)
+                Text(
+                    stringResource(R.string.home_map_stopped_body),
+                    style = MaterialTheme.typography.bodyLarge,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+                Spacer(Modifier.height(8.dp))
+                // Side by side, the same size, the likely one lit: one clear choice, not a stack.
+                Row(horizontalArrangement = Arrangement.spacedBy(14.dp)) {
+                    StatusButton(stringResource(R.string.home_reopen_map), GsTone.Primary) { scope.launch { CarServices.reconnectNav(frame) } }
+                    StatusButton(stringResource(R.string.home_car_apps), GsTone.Tonal) { navigator.apps() }
+                }
             } else {
                 // Autostart is still picking one - a navigation app is installed, so this resolves
                 // to a "Starting..." state itself, in the next frame or two.
@@ -162,9 +210,17 @@ private fun MapPane(status: CarAppConnection.Status, frame: CarEnvironment.Frame
     }
 }
 
+/** A big, even button for the map pane's few choices. */
+@Composable
+private fun StatusButton(label: String, tone: GsTone, onClick: () -> Unit) {
+    GsButton(onClick = onClick, tone = tone, modifier = Modifier.width(220.dp).height(64.dp)) {
+        Text(label, style = MaterialTheme.typography.titleMedium, fontWeight = FontWeight.SemiBold)
+    }
+}
+
 /**
- * The player, docked beside the map: art, title, progress, transport, then like, shuffle, repeat
- * and lyrics. While it's here the nav bar's pill steps aside on Home, so the controls never show
+ * The player, docked beside the map: the art as large as it fits, then title, progress, transport,
+ * and like, shuffle, repeat and lyrics along the bottom. While it's here the nav bar's pill steps aside on Home, so the controls never show
  * twice. The X sends it back to the nav bar.
  */
 @Composable
@@ -175,28 +231,31 @@ private fun DockedPlayer(now: NowPlaying, modifier: Modifier) {
     val scheme = MaterialTheme.colorScheme
     val art by produceState(now.art, now.art, now.artUri) { value = now.art ?: MediaArt.load(context, now.artUri) }
 
-    Surface(modifier = modifier, color = rememberArtColor(art, MaterialTheme.colorScheme.surfaceVariant)) {
-        BoxWithConstraints(Modifier.fillMaxSize().padding(12.dp)) {
-            // Whatever height the controls below leave over, so the art grows on a taller
-            // screen and shrinks rather than pushing the buttons off a short one.
-            val artSize = minOf(maxWidth - 44.dp, maxHeight - 250.dp).coerceIn(56.dp, 200.dp)
+    // The theme's surface, with a faint wash of the cover's colours behind the top of it. A solid
+    // slab of album colour beside the map fought it for attention; this only hints at the song.
+    Surface(modifier = modifier.gsPanelShadow(CARD_SHAPE), shape = CARD_SHAPE, color = scheme.surfaceContainer) {
+        AlbumGlow(art, Modifier.fillMaxSize())
+        Box(Modifier.fillMaxSize().padding(12.dp)) {
             Column(Modifier.fillMaxSize(), horizontalAlignment = Alignment.CenterHorizontally) {
-                Box(Modifier.fillMaxWidth()) {
+                // The cover gets everything the controls leave, as big a square as fits, sitting
+                // right on top of the title; the controls stay pinned to the bottom.
+                BoxWithConstraints(Modifier.weight(1f).fillMaxWidth(), contentAlignment = Alignment.BottomCenter) {
+                    val artSize = minOf(maxWidth, maxHeight).coerceAtLeast(0.dp)
                     // Art opens the full media screen, same as on the pill.
+                    val coverShape = RoundedCornerShape(16.dp)
                     Box(
                         Modifier
-                            .align(Alignment.TopCenter)
                             .size(artSize)
-                            .clip(RoundedCornerShape(12.dp))
+                            .gsPanelShadow(coverShape)
+                            .clip(coverShape)
                             .background(scheme.surface)
                             .clickable { navigator.media() },
                     ) {
-                        art?.let { Image(it.asImageBitmap(), null, Modifier.fillMaxSize(), contentScale = ContentScale.Crop) }
+                        // A new song's cover fades in over the old one instead of cutting to it.
+                        androidx.compose.animation.Crossfade(art, animationSpec = tween(350), label = "cover") { shown ->
+                            shown?.let { Image(it.asImageBitmap(), null, Modifier.fillMaxSize(), contentScale = ContentScale.Crop) }
+                        }
                     }
-                    GsIconButton(
-                        Icons.Filled.Close, "Back to the nav bar", navigator::closeSidePanel,
-                        Modifier.align(Alignment.TopEnd), size = 36.dp, iconSize = 20.dp,
-                    )
                 }
                 Spacer(Modifier.height(10.dp))
                 Text(
@@ -212,46 +271,53 @@ private fun DockedPlayer(now: NowPlaying, modifier: Modifier) {
                 } else {
                     Spacer(Modifier.height(10.dp))
                 }
-                TransportRow(now, media, skip = 48.dp, modifier = Modifier.fillMaxWidth())
+                TransportRow(now, media, skip = 56.dp, modifier = Modifier.fillMaxWidth())
                 Spacer(Modifier.height(10.dp))
-                PlayModeRow(now, media, size = 42.dp, modifier = Modifier.fillMaxWidth()) {
+                PlayModeRow(now, media, size = 50.dp, modifier = Modifier.fillMaxWidth()) {
                     GsIconButton(
-                        ImageVector.vectorResource(R.drawable.lyrics_24), "Lyrics", navigator::showSideLyrics,
-                        size = 42.dp, iconSize = 22.dp,
+                        ImageVector.vectorResource(R.drawable.lyrics_24), stringResource(R.string.storage_lyrics), navigator::showSideLyrics,
+                        size = 50.dp, iconSize = 26.dp,
                     )
                 }
             }
+            GsIconButton(
+                Icons.Filled.Close, stringResource(R.string.home_back_nav), navigator::closeSidePanel,
+                Modifier.align(Alignment.TopEnd), size = 36.dp, iconSize = 20.dp,
+            )
         }
     }
 }
 
 /**
- * Lyrics alone beside the map, big enough to read at a glance. No art: that space goes to a
- * larger title and artist instead. The player goes back to the nav bar meanwhile, whose dock
- * button swaps these back out for the controls.
+ * Lyrics alone beside the map, big enough to read at a glance. The header is slim, since the
+ * player goes back to the nav bar meanwhile and names the song there. Its note button swaps the
+ * lyrics back for the player; the X closes the panel.
  */
 @Composable
 private fun SideLyrics(now: NowPlaying, modifier: Modifier) {
     val navigator = LocalCarNavigator.current
     val context = LocalContext.current
+    val scheme = MaterialTheme.colorScheme
     val art by produceState(now.art, now.art, now.artUri) { value = now.art ?: MediaArt.load(context, now.artUri) }
-    Surface(modifier = modifier, color = rememberArtColor(art, MaterialTheme.colorScheme.surfaceVariant)) {
-        Column(Modifier.fillMaxSize().padding(16.dp)) {
-            Row(verticalAlignment = Alignment.Top) {
-                Column(Modifier.weight(1f)) {
-                    Text(
-                        now.title, style = MaterialTheme.typography.headlineSmall, fontWeight = FontWeight.Bold,
-                        maxLines = 2, overflow = TextOverflow.Ellipsis,
-                    )
-                    Text(
-                        now.artist, style = MaterialTheme.typography.titleMedium,
-                        color = MaterialTheme.colorScheme.onSurfaceVariant,
-                        maxLines = 1, overflow = TextOverflow.Ellipsis,
-                    )
+    Surface(modifier = modifier.gsPanelShadow(CARD_SHAPE), shape = CARD_SHAPE, color = scheme.surfaceContainer) {
+        Column(Modifier.fillMaxSize().padding(start = 18.dp, end = 12.dp, top = 12.dp, bottom = 8.dp)) {
+            Row(verticalAlignment = Alignment.CenterVertically) {
+                Box(Modifier.size(36.dp).clip(RoundedCornerShape(8.dp)).background(scheme.surface)) {
+                    art?.let { Image(it.asImageBitmap(), null, Modifier.fillMaxSize(), contentScale = ContentScale.Crop) }
                 }
-                GsIconButton(Icons.Filled.Close, "Hide lyrics", navigator::closeSidePanel, size = 36.dp, iconSize = 20.dp)
+                Spacer(Modifier.size(10.dp))
+                Text(
+                    listOf(now.title, now.artist).filter { it.isNotEmpty() }.joinToString(" · "),
+                    Modifier.weight(1f),
+                    style = MaterialTheme.typography.bodyMedium,
+                    color = scheme.onSurfaceVariant,
+                    maxLines = 1, overflow = TextOverflow.Ellipsis,
+                )
+                // The way back to the player, as the player's own Lyrics button is the way here.
+                GsIconButton(MediaIcons.MusicNote, stringResource(R.string.home_show_player), navigator::showSidePlayer, size = 36.dp, iconSize = 20.dp)
+                Spacer(Modifier.size(6.dp))
+                GsIconButton(Icons.Filled.Close, stringResource(R.string.home_hide_lyrics), navigator::closeSidePanel, size = 36.dp, iconSize = 20.dp)
             }
-            Spacer(Modifier.height(12.dp))
             LyricsPanel(now, Modifier.weight(1f).fillMaxWidth(), lineStyle = MaterialTheme.typography.headlineSmall)
         }
     }

gearslip/src/main/java/app/seb3thehacker/gearslip/car/CarKeyboard.kt

@@ -1,5 +1,7 @@
 package app.seb3thehacker.gearslip.car
 
+import androidx.compose.ui.res.stringResource
+import app.seb3thehacker.gearslip.R
 import app.seb3thehacker.gearslip.car.theme.*
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
@@ -153,7 +155,7 @@ fun CarKeyboard(
                     horizontalArrangement = Arrangement.spacedBy(4.dp),
                 ) {
                     Key(if (symbols) "abc" else "?123", Modifier.weight(1.4f)) { symbols = !symbols }
-                    Key("space", Modifier.weight(if (onDismiss != null) 3.2f else 4f)) { onTextChange("$text ") }
+                    Key(stringResource(R.string.keyboard_space), Modifier.weight(if (onDismiss != null) 3.2f else 4f)) { onTextChange("$text ") }
                     if (onDismiss != null) {
                         DismissKey(onDismiss, Modifier.weight(1.4f))
                     }
@@ -200,7 +202,7 @@ private fun DismissKey(onClick: () -> Unit, modifier: Modifier = Modifier) {
             horizontalArrangement = Arrangement.Center,
             verticalAlignment = Alignment.CenterVertically,
         ) {
-            Icon(Icons.Filled.Close, contentDescription = "Hide keyboard")
+            Icon(Icons.Filled.Close, contentDescription = stringResource(R.string.keyboard_hide))
         }
     }
 }
@@ -220,7 +222,7 @@ private fun SubmitKey(modifier: Modifier, search: Boolean, image: ImageVector?,
         ) {
             Icon(
                 image ?: if (search) Icons.Filled.Search else Icons.Filled.ArrowBack,
-                contentDescription = "Submit",
+                contentDescription = stringResource(R.string.keyboard_submit),
             )
         }
     }

gearslip/src/main/java/app/seb3thehacker/gearslip/car/CarLauncher.kt

@@ -1,5 +1,7 @@
 package app.seb3thehacker.gearslip.car
 
+import androidx.compose.ui.res.stringResource
+import app.seb3thehacker.gearslip.R
 import app.seb3thehacker.gearslip.car.theme.*
 import androidx.compose.foundation.Image
 import androidx.compose.foundation.ExperimentalFoundationApi
@@ -127,7 +129,7 @@ internal object LauncherCache {
         // notifications - rather than a filter per kind that has to know about the others.
         val tiles = (carApps.keys + mediaApps.keys + messagingApps.keys).flatMap { pkg ->
             val icon by lazy { iconOf(pkg) }
-            tilesFor(carApps[pkg], mediaApps[pkg], messagingApps[pkg]).map { tile ->
+            tilesFor(carApps[pkg], mediaApps[pkg], messagingApps[pkg], context.getString(R.string.media_browse)).map { tile ->
                 when (tile) {
                     is AppTile.Screen -> Entry(tile.label, icon, template = tile.app)
                     is AppTile.Player -> Entry(tile.app.label, icon, media = tile.app)
@@ -163,6 +165,7 @@ private fun tilesFor(
     car: TemplateApp?,
     media: app.seb3thehacker.gearslip.media.MediaApp?,
     messaging: app.seb3thehacker.gearslip.notify.MessagingApp?,
+    browse: String,
 ): List<AppTile> {
     if (car != null && !car.isMediaScreen && car.kind != "messaging") return listOf(AppTile.Screen(car, car.label))
     val pkg = car?.component?.packageName ?: media?.component?.packageName ?: messaging?.packageName ?: return emptyList()
@@ -170,7 +173,7 @@ private fun tilesFor(
         val screenRefused = KnownApps.screenBroken(pkg) && KnownApps.playerWorks(pkg)
         val messengerScreen = messaging != null && (car?.kind == "messaging" || car?.kind == "app")
         if (car != null && !messengerScreen && !(media != null && screenRefused)) {
-            add(AppTile.Screen(car, if (media != null) "${car.label} · Browse" else car.label))
+            add(AppTile.Screen(car, if (media != null) "${car.label} · $browse" else car.label))
         }
         if (media != null) add(AppTile.Player(media))
         else if (messaging != null) add(AppTile.Messages(messaging))
@@ -182,10 +185,13 @@ private fun tilesFor(
 internal fun rememberAllEntries(): List<Entry> {
     val context = LocalContext.current
     val installed by LauncherCache.state.collectAsState()
+    val launcher by LauncherMode.active.collectAsState()
     LaunchedEffect(context) {
         if (LauncherCache.entries == null) withContext(Dispatchers.IO) { LauncherCache.load(context) }
     }
-    return remember(installed) { BuiltInApps.entries + installed.orEmpty() }
+    return remember(installed, launcher) {
+        BuiltInApps.entries(launcher, LauncherMode.canCall(context)) + installed.orEmpty()
+    }
 }
 
 /** The launcher's groups, in the order they're laid out. */
@@ -221,9 +227,10 @@ private fun groupOf(entry: Entry, mediaPackages: Set<String>): AppGroup {
  * The launcher's tiles in the order they're drawn: grouped by [AppGroup], alphabetical inside a
  * group with Settings last of all, then with the driver's own moves from [custom] laid over it.
  * Moved apps only trade places among themselves, so an app installed later still lands in its group.
+ * [hidden] leaves tiles out of the drawer only: a pinned app stays on the nav bar.
  */
-internal fun launcherOrder(all: List<Entry>, showVehicleData: Boolean, custom: List<String>): List<Entry> {
-    val shown = all.filter { it.builtIn !== BuiltInApps.VehicleData || showVehicleData }
+internal fun launcherOrder(all: List<Entry>, showVehicleData: Boolean, custom: List<String>, hidden: Set<String>): List<Entry> {
+    val shown = all.filter { (it.builtIn !== BuiltInApps.VehicleData || showVehicleData) && it.componentId !in hidden }
     val mediaPackages = shown.mapNotNull { it.media?.component?.packageName }.toSet()
     val grouped = shown.sortedWith(
         compareBy<Entry>({ groupOf(it, mediaPackages) }, { it.builtIn === BuiltInApps.Settings }, { it.label.lowercase() }),
@@ -237,7 +244,7 @@ internal fun launcherOrder(all: List<Entry>, showVehicleData: Boolean, custom: L
 
 /** An app by the id a pin or the running list knows it by, built-in or installed. */
 internal fun findEntry(id: String): Entry? =
-    BuiltInApps.entries.find { it.componentId == id } ?: LauncherCache.entries?.find { it.componentId == id }
+    BuiltInApps.everyEntry.find { it.componentId == id } ?: LauncherCache.entries?.find { it.componentId == id }
 
 /** Rescans the car and media apps now, replacing the cached list; the launcher keeps showing the old one meanwhile. */
 fun warmLauncherApps(context: Context) { LauncherCache.load(context, force = true) }
@@ -280,14 +287,15 @@ fun CarLauncher() {
         val pkg = entry.packageName?.takeIf { entry.messaging == null }
         val id = entry.componentId
         return Tile(
-            entry.label, entry.icon, entry.builtIn?.glyph,
+            entry.builtIn?.let { context.getString(it.labelRes) } ?: entry.label, entry.icon, entry.builtIn?.glyph,
             broken = pkg != null && (KnownApps.isBroken(context, pkg) || (entry.template != null && KnownApps.screenBroken(pkg))),
             onLongClick = id?.let { { navigator.showAppMenu(it) } },
         ) { openApp(entry, id?.let { running[it] }, navigator, frame) }
     }
 
     val appOrder by CarSettings.appOrder.collectAsState()
-    val tiles = launcherOrder(all, showVehicleData, appOrder).map(::tileOf)
+    val hidden by CarSettings.hiddenApps.collectAsState()
+    val tiles = launcherOrder(all, showVehicleData, appOrder, hidden).map(::tileOf)
 
     LazyVerticalGrid(
         columns = GridCells.Adaptive(minSize = 108.dp),
@@ -307,7 +315,7 @@ private fun BrokenBadge(size: androidx.compose.ui.unit.Dp, modifier: Modifier =
         modifier.size(size).background(Color(0xFFD32F2F), CircleShape),
         contentAlignment = Alignment.Center,
     ) {
-        Icon(Icons.Filled.Close, contentDescription = "Doesn't work with Gearslip", tint = Color.White, modifier = Modifier.size(size * 0.66f))
+        Icon(Icons.Filled.Close, contentDescription = stringResource(R.string.launcher_broken), tint = Color.White, modifier = Modifier.size(size * 0.66f))
     }
 }
 

gearslip/src/main/java/app/seb3thehacker/gearslip/car/CarNavBar.kt

@@ -1,5 +1,6 @@
 package app.seb3thehacker.gearslip.car
 
+import androidx.compose.ui.res.stringResource
 import androidx.compose.material.icons.filled.Call
 import app.seb3thehacker.gearslip.call.CarCalls
 import app.seb3thehacker.gearslip.call.CallUiState
@@ -74,6 +75,7 @@ import androidx.compose.ui.layout.ContentScale
 import androidx.compose.ui.res.vectorResource
 import androidx.compose.ui.text.style.TextOverflow
 import app.seb3thehacker.gearslip.R
+import app.seb3thehacker.gearslip.notify.PhoneNavigation
 import app.seb3thehacker.gearslip.car.theme.GsColors
 import app.seb3thehacker.gearslip.car.theme.withTintedSurfaces
 import app.seb3thehacker.gearslip.car.theme.GsIconBox
@@ -115,12 +117,12 @@ private fun BreadcrumbBar(navigator: CarNavigator) {
         Modifier.fillMaxWidth().height(40.dp).padding(start = 2.dp, end = 10.dp),
         verticalAlignment = Alignment.CenterVertically,
     ) {
-        GsIconButton(Icons.AutoMirrored.Filled.ArrowBack, "Back", navigator::back, size = 32.dp, iconSize = 20.dp)
+        GsIconButton(Icons.AutoMirrored.Filled.ArrowBack, stringResource(R.string.back), navigator::back, size = 32.dp, iconSize = 20.dp)
         Spacer(Modifier.width(2.dp))
         trail.forEachIndexed { index, crumb ->
             val isLast = index == trail.lastIndex
             Text(
-                crumb.label,
+                crumb.shown(),
                 style = MaterialTheme.typography.labelLarge,
                 fontWeight = if (isLast) FontWeight.SemiBold else FontWeight.Normal,
                 color = if (isLast) MaterialTheme.colorScheme.onSurface else MaterialTheme.colorScheme.onSurfaceVariant,
@@ -164,7 +166,11 @@ internal fun CarNavBar(navigator: CarNavigator) {
     val frame by CarEnvironment.frame.collectAsState()
     val running = rememberRunningApps()
 
-    Surface(color = MaterialTheme.colorScheme.surfaceContainer) {
+    // A full-width strip along the bottom in the screens' own background, so it reads as part of
+    // the screen above rather than a panel on it. Over the player it's see-through, so the
+    // cover's glow carries on behind it.
+    val overPlayer = navigator.current == CarScreen.Media
+    Surface(color = if (overPlayer) androidx.compose.ui.graphics.Color.Transparent else MaterialTheme.colorScheme.background) {
         BoxWithConstraints(Modifier.fillMaxWidth().height(NAV_BAR_HEIGHT).padding(horizontal = 10.dp)) {
             Row(Modifier.fillMaxSize(), verticalAlignment = Alignment.CenterVertically) {
                 // Home and Apps are two different places now, not a toggle on one button - the
@@ -192,12 +198,13 @@ internal fun CarNavBar(navigator: CarNavigator) {
                 // Next turn first, off the map only; the player shares the space when it fits,
                 // and gives way to the turn when it doesn't.
                 // A call takes the player's place until it ends.
-                val turn = rememberNextTurn().takeIf { navigator.current != CarScreen.Home }
+                // A turn from the phone has no map in the car to show it, so it shows on Home too.
+                val turn = rememberNextTurn()?.takeIf { it.fromPhone || navigator.current != CarScreen.Home }
                 val call = CarCalls.state.collectAsState().value as? CallUiState.Active
                 BoxWithConstraints(Modifier.weight(1f).padding(horizontal = 16.dp), contentAlignment = Alignment.Center) {
                     val roomForBoth = maxWidth >= TURN_AND_PLAYER_MIN_WIDTH
                     Row(verticalAlignment = Alignment.CenterVertically, horizontalArrangement = Arrangement.spacedBy(10.dp)) {
-                        if (call == null || roomForBoth) turn?.let { NavTurnPill(it) { navigator.home() } }
+                        if (call == null || roomForBoth) turn?.let { NavTurnPill(it) { if (!it.fromPhone) navigator.home() } }
                         if (call != null) {
                             NavCallPill(call, Modifier.weight(1f, fill = false))
                         } else if (turn == null || roomForBoth) {
@@ -280,7 +287,7 @@ private fun NavHomeButton(navigator: CarNavigator, entries: List<Entry>, running
             }
         } else {
             Icon(
-                ImageVector.vectorResource(R.drawable.navigation_24), contentDescription = "Home",
+                ImageVector.vectorResource(R.drawable.navigation_24), contentDescription = stringResource(R.string.crumb_home),
                 modifier = Modifier.padding(NAV_ITEM_PADDING).size(28.dp),
             )
         }
@@ -341,7 +348,7 @@ private fun NavAppIcon(
         onLongClick = onLongClick,
     ) {
         entry.icon?.let { Image(it, entry.label, Modifier.size(30.dp).clip(RoundedCornerShape(8.dp))) }
-        entry.builtIn?.let { Icon(it.glyph, entry.label, Modifier.size(26.dp)) }
+        entry.builtIn?.let { Icon(it.glyph, entry.shownLabel(), Modifier.size(26.dp)) }
         // Only running apps get the line along the bottom edge, the usual taskbar mark for it.
         if (open) {
             Box(
@@ -411,8 +418,8 @@ private const val TITLE_SHOWN_MS = 3_000L
 /** Below this, the nav bar's middle only has room for the turn, not the player beside it. */
 private val TURN_AND_PLAYER_MIN_WIDTH = 520.dp
 
-/** The next manoeuvre, as the running nav app last described it. */
-private class NextTurn(val icon: CarIcon?, val distance: String, val road: String)
+/** The next manoeuvre, as the running nav app last described it, or [fromPhone] a map guiding on the phone. */
+private class NextTurn(val icon: CarIcon?, val distance: String, val road: String, val fromPhone: Boolean = false)
 
 /**
  * Read straight off the nav app's own template: a navigation app keeps sending its routing card
@@ -424,10 +431,10 @@ private fun rememberNextTurn(): NextTurn? {
     val template by CarServices.nav.template.collectAsState()
     // Read so a change of units redraws the distance straight away, not at the next update.
     CarSettings.units.collectAsState().value
-    if (status.phase != CarAppConnection.Phase.RUNNING) return null
-    val routing = (template as? NavigationTemplate)?.navigationInfo as? RoutingInfo ?: return null
-    if (routing.isLoading) return null
-    val step = routing.currentStep ?: return null
+    val phone by PhoneNavigation.turn.collectAsState()
+    val routing = ((template as? NavigationTemplate)?.navigationInfo as? RoutingInfo)
+        ?.takeIf { status.phase == CarAppConnection.Phase.RUNNING }
+    val step = routing?.takeIf { !it.isLoading }?.currentStep ?: return phone?.let { phoneTurn(it) }
     return NextTurn(
         icon = step.maneuver?.icon,
         distance = routing.currentDistance.display(),
@@ -435,6 +442,15 @@ private fun rememberNextTurn(): NextTurn? {
     )
 }
 
+/** Google Maps' or Waze's own arrow, and the distance as the app wrote it. */
+@Composable
+private fun phoneTurn(turn: PhoneNavigation.Turn): NextTurn {
+    val icon = remember(turn.arrow) {
+        turn.arrow?.let { CarIcon.Builder(androidx.core.graphics.drawable.IconCompat.createWithBitmap(it)).build() }
+    }
+    return NextTurn(icon, turn.distance?.display() ?: turn.distanceText, turn.road, fromPhone = true)
+}
+
 /** The next turn in the nav bar: arrow, how far, onto what. Tapping goes back to the map. */
 @Composable
 private fun NavTurnPill(turn: NextTurn, onClick: () -> Unit) {
@@ -492,7 +508,7 @@ private fun NavCallPill(call: CallUiState.Active, modifier: Modifier = Modifier)
         ) {
             Icon(Icons.Filled.Call, contentDescription = null, modifier = Modifier.size(20.dp))
             Text(
-                call.caller?.label ?: "On a call",
+                call.caller?.label ?: stringResource(R.string.navbar_on_call),
                 style = MaterialTheme.typography.titleSmall,
                 fontWeight = FontWeight.SemiBold,
                 maxLines = 1,
@@ -507,12 +523,12 @@ private fun NavCallPill(call: CallUiState.Active, modifier: Modifier = Modifier)
             Spacer(Modifier.width(2.dp))
             GsIconButton(
                 if (muted) MediaIcons.MicOff else MediaIcons.Mic,
-                if (muted) "Unmute" else "Mute",
+                stringResource(if (muted) R.string.navbar_unmute else R.string.navbar_mute),
                 CarCalls::toggleMute,
                 tone = if (muted) GsTone.Primary else GsTone.Neutral, size = 36.dp, iconSize = 22.dp,
             )
             GsIconButton(
-                MediaIcons.CallEnd, "End call", { CarCalls.end(context) },
+                MediaIcons.CallEnd, stringResource(R.string.navbar_end_call), { CarCalls.end(context) },
                 colors = GsColors(scheme.error, scheme.onError), size = 36.dp, iconSize = 22.dp,
             )
         }
@@ -520,15 +536,16 @@ private fun NavCallPill(call: CallUiState.Active, modifier: Modifier = Modifier)
 }
 
 /** "Title - Artist" on one line. The text itself cuts it off, and only where the pill runs out of room. */
+@Composable
 private fun nowPlayingLabel(title: String, artist: String): String =
     listOf(title.trim(), artist.trim()).filter { it.isNotEmpty() }.joinToString(" - ")
-        .ifEmpty { "Nothing playing" }
+        .ifEmpty { stringResource(R.string.media_nothing_playing) }
 
 /**
  * The player in the nav bar, on every screen. Art and title open the full media screen;
  * play/pause and skip work right here. The dock button moves the player into the column beside
  * the map on Home (see [CarHome]), and the pill steps aside there while it's docked - unless the
- * column is showing lyrics instead, when the pill stays and its dock button swaps them back.
+ * column is showing lyrics instead, when the pill stays and its dock button closes them.
  */
 @Composable
 private fun NavNowPlaying(navigator: CarNavigator, selected: Boolean, modifier: Modifier = Modifier) {
@@ -604,24 +621,34 @@ private fun NavNowPlaying(navigator: CarNavigator, selected: Boolean, modifier:
                 }
                 if (!showTitle) {
                     GsIconButton(
-                        MediaIcons.Previous, "Previous", media::previous,
+                        MediaIcons.Previous, stringResource(R.string.player_previous), media::previous,
                         enabled = now.canDo(PlaybackState.ACTION_SKIP_TO_PREVIOUS), size = 36.dp, iconSize = 22.dp,
                     )
                 }
                 GsIconButton(
                     if (now.playing) MediaIcons.Pause else Icons.Filled.PlayArrow,
-                    if (now.playing) "Pause" else "Play",
+                    stringResource(if (now.playing) R.string.player_pause else R.string.media_play),
                     media::togglePlay,
                     tone = GsTone.Primary, size = 36.dp, iconSize = 22.dp,
                 )
                 if (!showTitle) {
                     GsIconButton(
-                        MediaIcons.Next, "Next", media::next,
+                        MediaIcons.Next, stringResource(R.string.player_next), media::next,
                         enabled = now.canDo(PlaybackState.ACTION_SKIP_TO_NEXT), size = 36.dp, iconSize = 22.dp,
                     )
                 }
+                // Drawn on the side the panel opens on, and filled in while it's open.
+                val playerLeft by CarSettings.playerLeft.collectAsState()
+                val docked = navigator.current == CarScreen.Home && navigator.sidePanel != SidePanel.NONE
                 GsIconButton(
-                    MediaIcons.DockRight, "Move the player beside the map", navigator::togglePlayerDock,
+                    when {
+                        playerLeft && docked -> MediaIcons.DockLeftOpen
+                        playerLeft -> MediaIcons.DockLeft
+                        docked -> MediaIcons.DockRightOpen
+                        else -> MediaIcons.DockRight
+                    },
+                    stringResource(if (docked) R.string.navbar_close_panel else R.string.navbar_dock_player),
+                    navigator::togglePlayerDock,
                     size = 36.dp, iconSize = 22.dp,
                 )
             }

gearslip/src/main/java/app/seb3thehacker/gearslip/car/CarNavigator.kt

@@ -1,5 +1,9 @@
 package app.seb3thehacker.gearslip.car
 
+import androidx.compose.runtime.Composable
+import androidx.annotation.StringRes
+import androidx.compose.ui.res.stringResource
+import app.seb3thehacker.gearslip.R
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateListOf
 import androidx.compose.runtime.mutableStateOf
@@ -41,7 +45,11 @@ sealed interface CarScreen {
 enum class SidePanel { NONE, CONTROLS, LYRICS }
 
 /** One step on the breadcrumb trail: the screen it shows and the word for it in the trail. */
-data class Crumb(val screen: CarScreen, val label: String)
+data class Crumb(val screen: CarScreen, val label: String, @param:StringRes val labelRes: Int = 0) {
+    /** [labelRes] when the step is one of Gearslip's own, translated; [label] for an app's own name. */
+    @Composable
+    fun shown(): String = if (labelRes != 0) stringResource(labelRes) else label
+}
 
 /**
  * Where the car UI is, and how it got there. A car touchscreen has no hardware back button, so
@@ -57,6 +65,7 @@ class CarNavigator(startId: String) {
         Crumb(
             if (CarApps.find(startId) != null) CarScreen.App(startId) else CarScreen.Home,
             "Home",
+            R.string.crumb_home,
         ),
     )
 
@@ -69,15 +78,15 @@ class CarNavigator(startId: String) {
 
     /** Pushes a new step, unless it's the same screen already on top - tapping the button for
      * where you already are shouldn't grow the trail. */
-    private fun push(screen: CarScreen, label: String) {
+    private fun push(screen: CarScreen, label: String, @StringRes labelRes: Int = 0) {
         if (stack.last().screen == screen) return
-        stack.add(Crumb(screen, label))
+        stack.add(Crumb(screen, label, labelRes))
     }
 
     /** The one way back to a clean slate: resets the whole trail to just Home. */
     fun home() {
         stack.clear()
-        stack.add(Crumb(CarScreen.Home, "Home"))
+        stack.add(Crumb(CarScreen.Home, "Home", R.string.crumb_home))
     }
 
     /**
@@ -90,8 +99,9 @@ class CarNavigator(startId: String) {
         private set
 
     /**
-     * The pill's dock button: moves the player beside the map, going Home first if need be. With
-     * lyrics already there it swaps them for the controls; with the controls there it closes.
+     * The pill's dock button, an open/close switch for the panel: moves the player beside the map,
+     * going Home first if need be, or closes the panel when something is already there. Switching
+     * between the player and lyrics is done inside the panel itself.
      */
     fun togglePlayerDock() {
         if (current != CarScreen.Home) {
@@ -99,9 +109,11 @@ class CarNavigator(startId: String) {
             home()
             return
         }
-        sidePanel = if (sidePanel == SidePanel.CONTROLS) SidePanel.NONE else SidePanel.CONTROLS
+        sidePanel = if (sidePanel == SidePanel.NONE) SidePanel.CONTROLS else SidePanel.NONE
     }
 
+    fun showSidePlayer() { sidePanel = SidePanel.CONTROLS }
+
     fun showSideLyrics() { sidePanel = SidePanel.LYRICS }
 
     fun closeSidePanel() { sidePanel = SidePanel.NONE }
@@ -114,17 +126,17 @@ class CarNavigator(startId: String) {
 
     fun dismissAppMenu() { appMenu = null }
 
-    fun media() { push(CarScreen.Media, "Media") }
+    fun media() { push(CarScreen.Media, "Media", R.string.crumb_media) }
 
     fun browse(label: String) { push(CarScreen.Browse, label) }
 
-    fun apps() { push(CarScreen.Apps, "Apps") }
+    fun apps() { push(CarScreen.Apps, "Apps", R.string.crumb_apps) }
 
-    fun settings() { push(CarScreen.Settings, "Settings") }
+    fun settings() { push(CarScreen.Settings, "Settings", R.string.settings_title) }
 
-    fun dashboard() { push(CarScreen.Dashboard, "Dashboard") }
+    fun dashboard() { push(CarScreen.Dashboard, "Dashboard", R.string.crumb_dashboard) }
 
-    fun weather() { push(CarScreen.Weather, "Weather") }
+    fun weather() { push(CarScreen.Weather, "Weather", R.string.crumb_weather) }
 
     fun vehicleData() { push(CarScreen.VehicleData, "Vehicle data") }
 
@@ -132,10 +144,10 @@ class CarNavigator(startId: String) {
 
     /** The list lives on the dashboard; only a reply gets a screen of its own. */
     fun notifications(replyTo: String? = null) {
-        if (replyTo == null) dashboard() else push(CarScreen.Notifications(replyTo), "Reply")
+        if (replyTo == null) dashboard() else push(CarScreen.Notifications(replyTo), "Reply", R.string.crumb_reply)
     }
 
-    fun open(id: String) { push(CarScreen.App(id), CarApps.find(id)?.label ?: id) }
+    fun open(id: String) { push(CarScreen.App(id), CarApps.find(id)?.label ?: id, CarApps.find(id)?.labelRes ?: 0) }
 
     /** Jumps straight to a step already on the trail, dropping everything after it - what
      * tapping a breadcrumb does. Index 0 (Home) is always on the trail, so this always succeeds. */

gearslip/src/main/java/app/seb3thehacker/gearslip/car/CarServices.kt

@@ -2,6 +2,7 @@ package app.seb3thehacker.gearslip.car
 
 import android.content.ComponentName
 import android.content.Context
+import android.media.session.MediaController
 import android.media.session.MediaSessionManager
 import android.media.session.PlaybackState
 import app.seb3thehacker.gearslip.audio.CarAudio
@@ -30,6 +31,11 @@ object CarServices {
 
     private var context: Context? = null
 
+    /** Buffering counts as playing: an app between songs is about to make sound again. */
+    private val PLAYING_STATES = setOf(PlaybackState.STATE_PLAYING, PlaybackState.STATE_BUFFERING)
+    /** How long after pausing for the car leaving to look again for an app that started by itself. */
+    private const val REPAUSE_MS = 2_000L
+
     val nav: CarAppConnection by lazy { CarAppConnection(requireNotNull(context)) }
     val media: CarMedia by lazy { CarMedia(requireNotNull(context)) }
 
@@ -252,25 +258,76 @@ object CarServices {
      * the phone's speaker. Unplugging a USB accessory isn't "audio becoming noisy" the way
      * headphones are, so the apps won't pause themselves. Every playing session is paused, not
      * just the one Gearslip opened: anything the car was playing was going through the car.
+     * An app can start again on its own once the speaker is given back a moment later, which a
+     * Deezer driver heard after turning the car off (issue #39), so the ones it paused are
+     * looked at once more and paused again if they're playing.
      */
     fun pausePhoneMedia(why: String = "the car left") {
-        val ctx = context ?: return
+        pausedForNow = null
+        pausedOwnForNow = false
+        val paused = pause(why)
+        if (paused.isEmpty()) return
+        android.os.Handler(android.os.Looper.getMainLooper()).postDelayed({
+            val again = paused.filter { it.playbackState?.state in PLAYING_STATES }
+            again.forEach { runCatching { it.transportControls.pause() } }
+            if (again.isNotEmpty()) {
+                app.seb3thehacker.gearslip.GearslipLog.i("media: paused ${again.joinToString { it.packageName }} again: it started by itself after $why")
+            }
+        }, REPAUSE_MS)
+    }
+
+    /** What [pausePhoneMediaForNow] paused, for [resumePhoneMedia] to play again. */
+    @Volatile private var pausedForNow: List<MediaController>? = null
+    /** Without notification access, whether it paused the app Gearslip drives itself. */
+    @Volatile private var pausedOwnForNow = false
+
+    /** The car wants the speakers for a moment: pause, and remember what to play after. */
+    fun pausePhoneMediaForNow() {
+        pausedOwnForNow = false
+        pausedForNow = pause("the car needs the speakers for a moment")
+    }
+
+    /** The car handed the speakers back: play what it paused, unless the driver has since. */
+    fun resumePhoneMedia() {
+        val paused = pausedForNow ?: return
+        pausedForNow = null
+        if (pausedOwnForNow) {
+            pausedOwnForNow = false
+            mediaOrNull()?.let { if (!it.now.value.playing) it.togglePlay() }
+            return
+        }
+        val waiting = paused.filter { it.playbackState?.state == PlaybackState.STATE_PAUSED }
+        waiting.forEach { runCatching { it.transportControls.play() } }
+        if (waiting.isNotEmpty()) {
+            app.seb3thehacker.gearslip.GearslipLog.i("media: playing ${waiting.joinToString { it.packageName }} again: the car gave the speakers back")
+        }
+    }
+
+    /** What it paused. Without notification access it can only reach the app Gearslip drives itself. */
+    private fun pause(why: String): List<MediaController> {
+        val ctx = context ?: return emptyList()
         val manager = ctx.getSystemService(MediaSessionManager::class.java)
         val listener = ComponentName(ctx, GearslipNotificationListener::class.java)
         val playing = try {
-            manager.getActiveSessions(listener).filter { it.playbackState?.state == PlaybackState.STATE_PLAYING }
+            manager.getActiveSessions(listener).filter { it.playbackState?.state in PLAYING_STATES }
         } catch (e: SecurityException) {
             null
         }
         if (playing == null) {
             // No notification access: the app Gearslip itself is driving is all it can reach.
-            mediaOrNull()?.let { if (it.now.value.playing) it.togglePlay() }
-            return
+            mediaOrNull()?.let {
+                if (it.now.value.playing) {
+                    it.togglePlay()
+                    pausedOwnForNow = true
+                }
+            }
+            return emptyList()
         }
         playing.forEach { runCatching { it.transportControls.pause() } }
         if (playing.isNotEmpty()) {
             app.seb3thehacker.gearslip.GearslipLog.i("media: paused ${playing.joinToString { it.packageName }}: $why")
         }
+        return playing
     }
 
     /** The car went away: nothing should keep running for a screen that no longer exists. */

gearslip/src/main/java/app/seb3thehacker/gearslip/car/CarSettings.kt

@@ -1,5 +1,6 @@
 package app.seb3thehacker.gearslip.car
 
+import app.seb3thehacker.gearslip.car.theme.DarkStyle
 import android.content.Context
 import app.seb3thehacker.gearslip.AppSettings
 import app.seb3thehacker.gearslip.audio.CarAudio
@@ -52,10 +53,12 @@ enum class NavBarMode { SHOW, HIDE_NAVIGATING, HIDE }
 object CarSettings {
 
     private const val KEY_SCALE = "car_scale"
+    private const val KEY_DENSITY = "car_density"
     private const val KEY_OPEN = "car_open_on_connect"
     private const val KEY_NIGHT = "car_night_mode"
     private const val KEY_PIPE_AUDIO = "car_pipe_audio"
 private const val KEY_SPEAK_DIRECTIONS = "car_speak_directions"
+private const val KEY_DIRECTIONS_OVER_MUSIC = "car_directions_over_music"
 private const val KEY_BLUETOOTH_WARNING = "car_bluetooth_warning"
 private const val KEY_LOCATION_WARNING = "car_location_warning"
     private const val KEY_AUDIO_CHOICE_ASKED = "car_audio_choice_asked"
@@ -64,14 +67,18 @@ private const val KEY_LOCATION_WARNING = "car_location_warning"
     private const val KEY_AUTOPLAY = "car_autoplay"
     private const val KEY_PLAYER_TITLE = "car_player_title"
     private const val KEY_PLAYER_LEFT = "car_player_left"
+    private const val KEY_MORE_LYRICS = "car_more_lyrics"
     private const val KEY_THEME = "car_app_theme"
     private const val KEY_UI_THEME = "car_ui_theme"
+    private const val KEY_DARK_STYLE = "car_dark_style"
     private const val KEY_PINNED = "car_pinned_apps"
     private const val KEY_APP_ORDER = "car_app_order"
+    private const val KEY_HIDDEN_APPS = "car_hidden_apps"
     private const val KEY_EXPERIMENTAL_FEATURES = "car_experimental_features"
     private const val KEY_SYSTEM_SPEECH = "car_system_speech"
     private const val KEY_CAR_SENSORS = "car_sensors_enabled"
     private const val KEY_ADAPTIVE_VIDEO = "adaptive_video_enabled"
+private const val KEY_CLUSTER_VIDEO = "cluster_video_enabled"
     private const val KEY_DEBUG_BADGE = "debug_badge"
     private const val KEY_SEEN_SAFETY_WARNING = "car_seen_safety_warning"
     private const val KEY_UNITS = "car_units"
@@ -93,10 +100,12 @@ private const val KEY_LOCATION_WARNING = "car_location_warning"
     private lateinit var app: Context
 
     private val scaleFlow = MutableStateFlow(1f)
+    private val carDensityFlow = MutableStateFlow(DENSITY_FROM_CAR)
     private val openFlow = MutableStateFlow(HOME)
     private val nightFlow = MutableStateFlow(NightMode.AUTO)
     private val pipeAudioFlow = MutableStateFlow(true)
     private val speakDirectionsFlow = MutableStateFlow(true)
+    private val directionsOverMusicFlow = MutableStateFlow(false)
     private val bluetoothWarningFlow = MutableStateFlow(true)
     private val locationWarningFlow = MutableStateFlow(true)
     private val lastNavFlow = MutableStateFlow<String?>(null)
@@ -104,18 +113,25 @@ private const val KEY_LOCATION_WARNING = "car_location_warning"
     private val autoplayFlow = MutableStateFlow(false)
     private val playerTitleFlow = MutableStateFlow(false)
     private val playerLeftFlow = MutableStateFlow(false)
+    private val moreLyricsFlow = MutableStateFlow(true)
     private val themeFlow = MutableStateFlow(AppTheme.PHONE)
     val appTheme: StateFlow<AppTheme> = themeFlow
+    private val darkStyleFlow = MutableStateFlow(DarkStyle.BLACK)
+
+    /** How dark the car's dark mode goes; black until the driver picks another. */
+    val darkStyle: StateFlow<DarkStyle> = darkStyleFlow
     private val uiThemeFlow = MutableStateFlow(GsThemes.default.id)
 
     /** Id of the [GsTheme] controls are drawn in; an unknown id falls back to the default. */
     val uiTheme: StateFlow<String> = uiThemeFlow
     private val pinnedFlow = MutableStateFlow<Set<String>>(emptySet())
     private val appOrderFlow = MutableStateFlow<List<String>>(emptyList())
+    private val hiddenAppsFlow = MutableStateFlow<Set<String>>(emptySet())
     private val experimentalFeaturesFlow = MutableStateFlow(false)
     private val systemSpeechFlow = MutableStateFlow(false)
     private val carSensorsFlow = MutableStateFlow(false)
     private val adaptiveVideoFlow = MutableStateFlow(false)
+    private val clusterVideoFlow = MutableStateFlow(false)
     private val debugBadgeFlow = MutableStateFlow(true)
     private val seenSafetyWarningFlow = MutableStateFlow(false)
     private val unitsFlow = MutableStateFlow(Units.AUTO)
@@ -208,6 +224,9 @@ private const val KEY_LOCATION_WARNING = "car_location_warning"
     /** The launcher's order once the driver has moved a tile; empty keeps the grouped default. */
     val appOrder: StateFlow<List<String>> = appOrderFlow
 
+    /** The tiles left out of the car's app drawer, by [Entry.componentId]. */
+    val hiddenApps: StateFlow<Set<String>> = hiddenAppsFlow
+
     /** Flattened component names of the map and media apps used last, brought back on connect. */
     val lastNav: StateFlow<String?> = lastNavFlow
     val lastMedia: StateFlow<String?> = lastMediaFlow
@@ -224,7 +243,20 @@ private const val KEY_LOCATION_WARNING = "car_location_warning"
     /** The home screen's player sits left of the map instead of right of it. */
     val playerLeft: StateFlow<Boolean> = playerLeftFlow
 
+    /** Lyrics from BetterLyrics and KuGou as well as LRCLIB; off sends song details to LRCLIB only. */
+    val moreLyrics: StateFlow<Boolean> = moreLyricsFlow
+
     val scale: StateFlow<Float> = scaleFlow
+
+    /** [carDensity] when it leaves the choice to the car. */
+    const val DENSITY_FROM_CAR = 0
+    val DENSITIES = listOf(160, 180, 200, 220, 240)
+
+    /** An absolute DPI for the car UI and its apps; the video's resolution doesn't change with it. */
+    val carDensity: StateFlow<Int> = carDensityFlow
+
+    /** The density to draw at, for a car or preview that would otherwise use [carDpi]. */
+    fun effectiveDensity(carDpi: Int) = carDensityFlow.value.takeIf { it != DENSITY_FROM_CAR } ?: carDpi
     val openOnConnect: StateFlow<String> = openFlow
     val nightMode: StateFlow<NightMode> = nightFlow
 
@@ -240,6 +272,9 @@ private const val KEY_LOCATION_WARNING = "car_location_warning"
     /** Gearslip reads the map app's turns aloud on the car's directions channel; see DirectionsVoice. */
     val speakDirections: StateFlow<Boolean> = speakDirectionsFlow
 
+    /** The turns go out on the music channel instead, for cars the directions channel upsets. */
+    val directionsOverMusic: StateFlow<Boolean> = directionsOverMusicFlow
+
     /** With Bluetooth audio, warn when the phone isn't connected to the car; see BluetoothAudioCheck. */
     val bluetoothWarning: StateFlow<Boolean> = bluetoothWarningFlow
 
@@ -282,6 +317,13 @@ private const val KEY_LOCATION_WARNING = "car_location_warning"
      */
     val adaptiveVideoEnabled: StateFlow<Boolean> = adaptiveVideoFlow
 
+    /**
+     * Gearslip's turn card on a car's instrument-cluster screen, for a car that offers one as a
+     * second video sink. Applies only while [experimentalFeaturesEnabled] is on too, and from the
+     * next connection; untested in a car so far.
+     */
+    val clusterVideoEnabled: StateFlow<Boolean> = clusterVideoFlow
+
     /** Debug builds only: the car screen's DEBUG BUILD badge, which screenshots for the README leave out. */
     val debugBadge: StateFlow<Boolean> = debugBadgeFlow
 
@@ -306,20 +348,26 @@ private const val KEY_LOCATION_WARNING = "car_location_warning"
     fun init(context: Context) {
         app = context.applicationContext
         scaleFlow.value = AppSettings.getString(app, KEY_SCALE, "1.0").toFloatOrNull() ?: 1f
+        carDensityFlow.value = AppSettings.getString(app, KEY_DENSITY, "").toIntOrNull()?.takeIf { it in DENSITIES } ?: DENSITY_FROM_CAR
         openFlow.value = AppSettings.getString(app, KEY_OPEN, HOME)
         lastNavFlow.value = AppSettings.getString(app, KEY_LAST_NAV, "").ifEmpty { null }
         lastMediaFlow.value = AppSettings.getString(app, KEY_LAST_MEDIA, "").ifEmpty { null }
         themeFlow.value = runCatching {
             AppTheme.valueOf(AppSettings.getString(app, KEY_THEME, AppTheme.PHONE.name))
         }.getOrDefault(AppTheme.PHONE)
+        darkStyleFlow.value = runCatching {
+            DarkStyle.valueOf(AppSettings.getString(app, KEY_DARK_STYLE, DarkStyle.BLACK.name))
+        }.getOrDefault(DarkStyle.BLACK)
         uiThemeFlow.value = AppSettings.getString(app, KEY_UI_THEME, GsThemes.default.id)
         autoplayFlow.value = AppSettings.getString(app, KEY_AUTOPLAY, "false") == "true"
         playerTitleFlow.value = AppSettings.getString(app, KEY_PLAYER_TITLE, "false") == "true"
         playerLeftFlow.value = AppSettings.getString(app, KEY_PLAYER_LEFT, "false") == "true"
+        moreLyricsFlow.value = AppSettings.getString(app, KEY_MORE_LYRICS, "true") == "true"
         pipeAudioFlow.value = AppSettings.getString(app, KEY_PIPE_AUDIO, "true") == "true"
         // Until the driver sets it, on for USB audio and off for Bluetooth, where the map app's
         // own voice already reaches the car.
         speakDirectionsFlow.value = AppSettings.getString(app, KEY_SPEAK_DIRECTIONS, pipeAudioFlow.value.toString()) == "true"
+        directionsOverMusicFlow.value = AppSettings.getString(app, KEY_DIRECTIONS_OVER_MUSIC, "false") == "true"
         bluetoothWarningFlow.value = AppSettings.getString(app, KEY_BLUETOOTH_WARNING, "true") == "true"
         locationWarningFlow.value = AppSettings.getString(app, KEY_LOCATION_WARNING, "true") == "true"
         nightFlow.value = runCatching {
@@ -329,10 +377,13 @@ private const val KEY_LOCATION_WARNING = "car_location_warning"
             .split(",").filter { it.isNotEmpty() }.toSet()
         appOrderFlow.value = AppSettings.getString(app, KEY_APP_ORDER, "")
             .split(",").filter { it.isNotEmpty() }
+        hiddenAppsFlow.value = AppSettings.getString(app, KEY_HIDDEN_APPS, "")
+            .split(",").filter { it.isNotEmpty() }.toSet()
         experimentalFeaturesFlow.value = AppSettings.getString(app, KEY_EXPERIMENTAL_FEATURES, "false") == "true"
         systemSpeechFlow.value = AppSettings.getString(app, KEY_SYSTEM_SPEECH, "false") == "true"
         carSensorsFlow.value = AppSettings.getString(app, KEY_CAR_SENSORS, "false") == "true"
         adaptiveVideoFlow.value = AppSettings.getString(app, KEY_ADAPTIVE_VIDEO, "false") == "true"
+        clusterVideoFlow.value = AppSettings.getString(app, KEY_CLUSTER_VIDEO, "false") == "true"
         debugBadgeFlow.value = AppSettings.getString(app, KEY_DEBUG_BADGE, "true") == "true"
         seenSafetyWarningFlow.value = AppSettings.getString(app, KEY_SEEN_SAFETY_WARNING, "false") == "true"
         unitsFlow.value = runCatching {
@@ -358,6 +409,11 @@ private const val KEY_LOCATION_WARNING = "car_location_warning"
         AppSettings.putString(app, KEY_SCALE, value.toString())
     }
 
+    fun setCarDensity(dpi: Int) {
+        carDensityFlow.value = dpi
+        AppSettings.putString(app, KEY_DENSITY, dpi.toString())
+    }
+
     fun setOpenOnConnect(id: String) {
         openFlow.value = id
         AppSettings.putString(app, KEY_OPEN, id)
@@ -378,6 +434,11 @@ private const val KEY_LOCATION_WARNING = "car_location_warning"
         AppSettings.putString(app, KEY_THEME, theme.name)
     }
 
+    fun setDarkStyle(style: DarkStyle) {
+        darkStyleFlow.value = style
+        AppSettings.putString(app, KEY_DARK_STYLE, style.name)
+    }
+
     fun setUiTheme(id: String) {
         uiThemeFlow.value = id
         AppSettings.putString(app, KEY_UI_THEME, id)
@@ -393,6 +454,11 @@ private const val KEY_LOCATION_WARNING = "car_location_warning"
         AppSettings.putString(app, KEY_PLAYER_LEFT, on.toString())
     }
 
+    fun setMoreLyrics(on: Boolean) {
+        moreLyricsFlow.value = on
+        AppSettings.putString(app, KEY_MORE_LYRICS, on.toString())
+    }
+
     fun setAutoplay(on: Boolean) {
         autoplayFlow.value = on
         AppSettings.putString(app, KEY_AUTOPLAY, on.toString())
@@ -416,6 +482,11 @@ private const val KEY_LOCATION_WARNING = "car_location_warning"
         AppSettings.putString(app, KEY_SPEAK_DIRECTIONS, on.toString())
     }
 
+    fun setDirectionsOverMusic(on: Boolean) {
+        directionsOverMusicFlow.value = on
+        AppSettings.putString(app, KEY_DIRECTIONS_OVER_MUSIC, on.toString())
+    }
+
     fun setBluetoothWarning(on: Boolean) {
         bluetoothWarningFlow.value = on
         AppSettings.putString(app, KEY_BLUETOOTH_WARNING, on.toString())
@@ -441,6 +512,11 @@ private const val KEY_LOCATION_WARNING = "car_location_warning"
         AppSettings.putString(app, KEY_ADAPTIVE_VIDEO, on.toString())
     }
 
+    fun setClusterVideoEnabled(on: Boolean) {
+        clusterVideoFlow.value = on
+        AppSettings.putString(app, KEY_CLUSTER_VIDEO, on.toString())
+    }
+
     fun setCarSensorsEnabled(on: Boolean) {
         carSensorsFlow.value = on
         AppSettings.putString(app, KEY_CAR_SENSORS, on.toString())
@@ -465,6 +541,12 @@ private const val KEY_LOCATION_WARNING = "car_location_warning"
         AppSettings.putString(app, KEY_PINNED, next.joinToString(","))
     }
 
+    fun setAppHidden(id: String, hide: Boolean) {
+        val next = if (hide) hiddenAppsFlow.value + id else hiddenAppsFlow.value - id
+        hiddenAppsFlow.value = next
+        AppSettings.putString(app, KEY_HIDDEN_APPS, next.joinToString(","))
+    }
+
     fun setAppOrder(ids: List<String>) {
         appOrderFlow.value = ids
         AppSettings.putString(app, KEY_APP_ORDER, ids.joinToString(","))

gearslip/src/main/java/app/seb3thehacker/gearslip/car/CarSettingsScreen.kt

@@ -1,6 +1,9 @@
 package app.seb3thehacker.gearslip.car
 
+import androidx.compose.ui.res.stringResource
+import app.seb3thehacker.gearslip.R
 
+import app.seb3thehacker.gearslip.car.theme.DarkStyle
 import app.seb3thehacker.gearslip.car.theme.*
 import android.os.Build
 import androidx.compose.foundation.layout.Arrangement
@@ -8,6 +11,9 @@ import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxHeight
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.ui.graphics.Color
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
@@ -52,6 +58,7 @@ import kotlinx.coroutines.withContext
 fun CarSettingsScreen() {
     val scale by CarSettings.scale.collectAsState()
     val open by CarSettings.openOnConnect.collectAsState()
+    val launcher by LauncherMode.active.collectAsState()
     val night by CarSettings.nightMode.collectAsState()
     val units by CarSettings.units.collectAsState()
     val navBar by CarSettings.navBarMode.collectAsState()
@@ -60,16 +67,20 @@ fun CarSettingsScreen() {
     val whatsNew by CarSettings.whatsNewAfterUpdates.collectAsState()
     val pipeAudio by CarSettings.pipeAudio.collectAsState()
     val speakDirections by CarSettings.speakDirections.collectAsState()
+    val directionsOverMusic by CarSettings.directionsOverMusic.collectAsState()
     val bluetoothWarning by CarSettings.bluetoothWarning.collectAsState()
     val locationWarning by CarSettings.locationWarning.collectAsState()
     val autoplay by CarSettings.autoplay.collectAsState()
     val playerTitle by CarSettings.playerTitle.collectAsState()
     val playerLeft by CarSettings.playerLeft.collectAsState()
+    val moreLyrics by CarSettings.moreLyrics.collectAsState()
     val theme by CarSettings.appTheme.collectAsState()
     val uiTheme by CarSettings.uiTheme.collectAsState()
+    val darkStyle by CarSettings.darkStyle.collectAsState()
     val experimentalFeatures by CarSettings.experimentalFeaturesEnabled.collectAsState()
     val carSensors by CarSettings.carSensorsEnabled.collectAsState()
     val adaptiveVideo by CarSettings.adaptiveVideoEnabled.collectAsState()
+    val clusterVideo by CarSettings.clusterVideoEnabled.collectAsState()
     val systemSpeech by CarSettings.systemSpeech.collectAsState()
     val display by CarEnvironment.display.collectAsState()
     val vehicle by CarEnvironment.vehicle.collectAsState()
@@ -78,232 +89,275 @@ fun CarSettingsScreen() {
         value = withContext(Dispatchers.Default) { CertSummary.read(context) }
     }
 
-    LazyColumn(
-        Modifier.fillMaxSize(),
-        // Built as it scrolls into view rather than all at once: every row here is a set of
-        // buttons, and building the whole screen made opening Settings visibly slow.
-        contentPadding = PaddingValues(horizontal = 24.dp, vertical = 16.dp),
-        verticalArrangement = Arrangement.spacedBy(20.dp),
-    ) {
-        item {
-            ScreenHeader("Settings")
-        }
+    // A rail of the groups down the left, and the chosen group's settings beside it: five short
+    // lists instead of one long scroll.
+    var chosen by androidx.compose.runtime.saveable.rememberSaveable { androidx.compose.runtime.mutableIntStateOf(0) }
+    val listState = androidx.compose.foundation.lazy.rememberLazyListState()
+    androidx.compose.runtime.LaunchedEffect(chosen) { listState.scrollToItem(0) }
+    Row(Modifier.fillMaxSize().padding(start = 16.dp, top = 12.dp)) {
+    SettingsRail(listOf(stringResource(R.string.car_group_screen), stringResource(R.string.car_group_nav_bar), stringResource(R.string.car_group_sound), stringResource(R.string.car_group_warnings), stringResource(R.string.car_group_more)), chosen) { chosen = it }
+        LazyColumn(
+            Modifier.weight(1f).fillMaxHeight(),
+            state = listState,
+            // Built as it scrolls into view rather than all at once: every row here is a set of
+            // buttons, and building the whole screen made opening Settings visibly slow.
+            contentPadding = PaddingValues(horizontal = 24.dp, vertical = 16.dp),
+            verticalArrangement = Arrangement.spacedBy(20.dp),
+        ) {
+            var section: Int
+            section = 0
+            if (section == chosen) item { Group(stringResource(R.string.car_group_screen)) }
 
-        item { Group("Screen") }
-
-        item {
-            ChoiceRow(
-                "Open on connect",
-                listOf(CarSettings.HOME to "Home") + CarApps.all.filter { it.id != "settings" }.map { it.id to it.label },
-                open,
-            ) { CarSettings.setOpenOnConnect(it) }
-        }
-
-        item {
-            ChoiceRow(
-                "Size",
-                listOf(1f to "Normal", 1.25f to "Large", 1.5f to "Extra large"),
-                scale,
-            ) { CarSettings.setScale(it) }
-        }
-
-        item {
-            ChoiceRow(
-                "App theme",
-                listOf(AppTheme.PHONE to "Follow phone", AppTheme.LIGHT to "Light", AppTheme.DARK to "Dark"),
-                theme,
-            ) { CarSettings.setAppTheme(it) }
-        }
-
-        item {
-            ChoiceRow(
-                "Theme",
-                GsThemes.builtIn.map { it.id to it.name },
-                uiTheme,
-            ) { CarSettings.setUiTheme(it) }
-        }
-
-        item {
-            ChoiceRow(
-                "Map day/night",
-                listOf(NightMode.AUTO to "Auto", NightMode.DAY to "Day", NightMode.NIGHT to "Night"),
-                night,
-            ) { CarSettings.setNightMode(it) }
-        }
-
-        item {
-            ChoiceRow(
-                "Units",
-                listOf(Units.AUTO to "Auto", Units.IMPERIAL to "Imperial (mi, ft, °F)", Units.METRIC to "Metric (km, m, °C)"),
-                units,
-            ) { CarSettings.setUnits(it) }
-        }
-
-        // For a head unit that reports the wrong size and stretches the picture (issue #12).
-        item {
-            ChoiceRow(
-                "Screen size (next connection)",
-                listOf<ScreenSize?>(null).plus(SCREEN_PRESETS).plus(screenSize).distinct()
-                    .map { it to (it?.toString() ?: "From the car") },
-                screenSize,
-            ) { CarSettings.setScreenSize(it) }
-        }
-
-        if (screenSize != null) item {
-            ChoiceRow(
-                "Fit to the screen",
-                listOf(ScreenFit.CROP to "Crop the edges", ScreenFit.SQUASH to "Squash to fit"),
-                screenFit,
-            ) { CarSettings.setScreenFit(it) }
-        }
-
-        item { Group("Nav bar and player") }
-
-        item {
-            ChoiceRow(
-                "Nav bar",
-                listOf(
-                    NavBarMode.SHOW to "Always show",
-                    NavBarMode.HIDE_NAVIGATING to "Hide while navigating",
-                    NavBarMode.HIDE to "Hide until tapped",
-                ),
-                navBar,
-            ) { CarSettings.setNavBarMode(it) }
-        }
-
-        item {
-            ChoiceRow(
-                "Player in the nav bar",
-                listOf(false to "Skip buttons", true to "Song title"),
-                playerTitle,
-            ) { CarSettings.setPlayerTitle(it) }
-        }
-
-        item {
-            ChoiceRow(
-                "Player beside the map",
-                listOf(false to "Right", true to "Left"),
-                playerLeft,
-            ) { CarSettings.setPlayerLeft(it) }
-        }
-
-        item {
-            ChoiceRow(
-                "Autoplay on connect",
-                listOf(false to "Off", true to "On"),
-                autoplay,
-            ) { CarSettings.setAutoplay(it) }
-        }
-
-        item { Group("Sound and voice") }
-
-        item {
-            ChoiceRow(
-                "Car audio",
-                listOf(false to "Bluetooth", true to "USB"),
-                pipeAudio,
-            ) { CarSettings.setPipeAudio(it) }
-        }
-
-        item {
-            Text(
-                "USB sends the phone's sound through Gearslip. Android asks to share your screen each " +
-                    "drive, and a few apps block it. Bluetooth plays as the phone normally would, and " +
-                    "Android never asks.",
-                style = MaterialTheme.typography.bodySmall,
-                color = MaterialTheme.colorScheme.onSurfaceVariant,
-            )
-        }
-
-        item { Group("Warnings") }
-
-        if (!pipeAudio) item {
-            ChoiceRow(
-                "Warn when Bluetooth isn't connected",
-                listOf(false to "Off", true to "On"),
-                bluetoothWarning,
-            ) { CarSettings.setBluetoothWarning(it) }
-        }
-
-        item {
-            ChoiceRow(
-                "Warn when location is off",
-                listOf(false to "Off", true to "On"),
-                locationWarning,
-            ) { CarSettings.setLocationWarning(it) }
-        }
-
-        item {
-            ChoiceRow(
-                "Spoken directions",
-                listOf(false to "Off", true to "On"),
-                speakDirections,
-            ) { CarSettings.setSpeakDirections(it) }
-        }
-
-        item {
-            Text(
-                "Gearslip reads each turn aloud through the car's speakers, and the music dips while it " +
-                    "speaks. Turn it off if your map app's own voice already plays in the car.",
-                style = MaterialTheme.typography.bodySmall,
-                color = MaterialTheme.colorScheme.onSurfaceVariant,
-            )
-        }
-
-        item {
-            ExperimentalFeatureRow(
-                title = "Use the phone's speech recognition",
-                description = "Listens through the phone's own speech service instead of Gearslip's. On " +
-                    "most phones that's Google's, which may send your voice to Google. GrapheneOS has " +
-                    "none, so Gearslip keeps using its own.",
-                checked = systemSpeech,
-            ) { CarSettings.setSystemSpeech(it) }
-        }
-
-        item { Group("More") }
-
-        item {
-            WebPageSetting()
-        }
-
-        item {
-            ScreenFit(vehicle)
-        }
-
-        item {
-            ChoiceRow(
-                "Experimental features",
-                listOf(false to "Hide", true to "Show"),
-                experimentalFeatures,
-            ) { CarSettings.setExperimentalFeaturesEnabled(it) }
-        }
-
-        if (experimentalFeatures) item {
-            ExperimentalFeaturesList(carSensors, adaptiveVideo)
-        }
-
-        item {
-            Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {
-                Text("Connection", style = MaterialTheme.typography.titleMedium, color = MaterialTheme.colorScheme.primary)
-                Info("Phone", "${Build.MANUFACTURER} ${Build.MODEL}")
-                Info("Vehicle", vehicle.ifEmpty { "-" })
-                Info("Video", display.ifEmpty { "-" })
-                Info("Certificate", cert?.headline ?: "Checking…")
+            if (section == chosen) item {
+                ChoiceRow(
+                    stringResource(R.string.car_open_on_connect),
+                    listOf(CarSettings.HOME to stringResource(R.string.choice_open_home)) + CarApps.shown(launcher, LauncherMode.canCall(context)).map { it.id to stringResource(it.labelRes) },
+                    open,
+                ) { CarSettings.setOpenOnConnect(it) }
             }
-        }
 
-        item {
-            Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {
-                Text("About", style = MaterialTheme.typography.titleMedium, color = MaterialTheme.colorScheme.primary)
-                Info("Version", app.seb3thehacker.gearslip.BuildConfig.VERSION_NAME)
-                Info("Build", app.seb3thehacker.gearslip.BuildConfig.VERSION_CODE.toString())
+            if (section == chosen) item {
+                ChoiceRow(
+                    stringResource(R.string.car_size),
+                    listOf(1f to stringResource(R.string.choice_size_normal), 1.25f to stringResource(R.string.choice_size_large), 1.5f to stringResource(R.string.choice_size_xlarge)),
+                    scale,
+                ) { CarSettings.setScale(it) }
+            }
+
+            if (section == chosen) item {
+                ChoiceRow(
+                    stringResource(R.string.car_app_theme),
+                    listOf(AppTheme.PHONE to stringResource(R.string.choice_theme_phone), AppTheme.LIGHT to stringResource(R.string.choice_theme_light), AppTheme.DARK to stringResource(R.string.choice_theme_dark)),
+                    theme,
+                ) { CarSettings.setAppTheme(it) }
+            }
+
+            if (section == chosen && theme != AppTheme.LIGHT) item {
+                ChoiceRow(
+                    stringResource(R.string.car_dark_mode),
+                    listOf(
+                        DarkStyle.BLACK to stringResource(R.string.choice_dark_black),
+                        DarkStyle.BLACK_COLOUR to stringResource(R.string.choice_dark_black_colour),
+                        DarkStyle.DEEP_COLOUR to stringResource(R.string.choice_dark_deep_colour),
+                        DarkStyle.GREY to stringResource(R.string.choice_dark_grey),
+                    ),
+                    darkStyle,
+                ) { CarSettings.setDarkStyle(it) }
+            }
+
+            if (section == chosen) item {
+                ChoiceRow(
+                    stringResource(R.string.carset_theme),
+                    GsThemes.builtIn.map { it.id to it.name },
+                    uiTheme,
+                ) { CarSettings.setUiTheme(it) }
+            }
+
+            if (section == chosen) item {
+                ChoiceRow(
+                    stringResource(R.string.car_map_day_night),
+                    listOf(NightMode.AUTO to stringResource(R.string.choice_auto), NightMode.DAY to stringResource(R.string.choice_night_day), NightMode.NIGHT to stringResource(R.string.choice_night_night)),
+                    night,
+                ) { CarSettings.setNightMode(it) }
+            }
+
+            if (section == chosen) item {
+                ChoiceRow(
+                    stringResource(R.string.car_units),
+                    listOf(Units.AUTO to stringResource(R.string.choice_auto), Units.IMPERIAL to stringResource(R.string.carset_imperial), Units.METRIC to stringResource(R.string.carset_metric)),
+                    units,
+                ) { CarSettings.setUnits(it) }
+            }
+
+            // For a head unit that reports the wrong size and stretches the picture (issue #12).
+            if (section == chosen) item {
+                ChoiceRow(
+                    stringResource(R.string.carset_screen_size),
+                    listOf<ScreenSize?>(null).plus(SCREEN_PRESETS).plus(screenSize).distinct()
+                        .map { it to (it?.toString() ?: stringResource(R.string.screen_from_car)) },
+                    screenSize,
+                ) { CarSettings.setScreenSize(it) }
+            }
+
+            if (section == chosen && screenSize != null) item {
+                ChoiceRow(
+                    stringResource(R.string.carset_fit),
+                    listOf(ScreenFit.CROP to stringResource(R.string.screen_crop), ScreenFit.SQUASH to stringResource(R.string.screen_squash)),
+                    screenFit,
+                ) { CarSettings.setScreenFit(it) }
+            }
+
+            section = 1
+            if (section == chosen) item { Group(stringResource(R.string.car_group_nav_bar)) }
+
+            if (section == chosen) item {
+                ChoiceRow(
+                    stringResource(R.string.car_nav_bar),
+                    listOf(
+                        NavBarMode.SHOW to stringResource(R.string.choice_nav_show),
+                        NavBarMode.HIDE_NAVIGATING to stringResource(R.string.choice_nav_hide_navigating),
+                        NavBarMode.HIDE to stringResource(R.string.choice_nav_hide),
+                    ),
+                    navBar,
+                ) { CarSettings.setNavBarMode(it) }
+            }
+
+            if (section == chosen) item {
+                ChoiceRow(
+                    stringResource(R.string.car_player_nav_bar),
+                    listOf(false to stringResource(R.string.car_skip_buttons), true to stringResource(R.string.car_song_title)),
+                    playerTitle,
+                ) { CarSettings.setPlayerTitle(it) }
+            }
+
+            if (section == chosen) item {
+                ChoiceRow(
+                    stringResource(R.string.car_player_beside_map),
+                    listOf(false to stringResource(R.string.car_right), true to stringResource(R.string.car_left)),
+                    playerLeft,
+                ) { CarSettings.setPlayerLeft(it) }
+            }
+
+            if (section == chosen) item {
+                ChoiceRow(
+                    stringResource(R.string.car_autoplay),
+                    listOf(false to stringResource(R.string.off), true to stringResource(R.string.on)),
+                    autoplay,
+                ) { CarSettings.setAutoplay(it) }
+            }
+
+            if (section == chosen) item {
+                ChoiceRow(
+                    stringResource(R.string.carset_lyrics_from),
+                    listOf(false to "LRCLIB", true to stringResource(R.string.carset_more_sources)),
+                    moreLyrics,
+                ) { CarSettings.setMoreLyrics(it) }
+            }
+
+            section = 2
+            if (section == chosen) item { Group(stringResource(R.string.car_group_sound)) }
+
+            if (section == chosen) item {
+                ChoiceRow(
+                    stringResource(R.string.car_audio),
+                    listOf(false to stringResource(R.string.guide_audio_bluetooth), true to stringResource(R.string.guide_audio_usb)),
+                    pipeAudio,
+                ) { CarSettings.setPipeAudio(it) }
+            }
+
+            if (section == chosen) item {
+                Text(
+                    stringResource(R.string.carset_audio_note),
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+
+            section = 3
+            if (section == chosen) item { Group(stringResource(R.string.car_group_warnings)) }
+
+            if (section == chosen && !pipeAudio) item {
+                ChoiceRow(
+                    stringResource(R.string.car_warn_bluetooth),
+                    listOf(false to stringResource(R.string.off), true to stringResource(R.string.on)),
+                    bluetoothWarning,
+                ) { CarSettings.setBluetoothWarning(it) }
+            }
+
+            if (section == chosen) item {
+                ChoiceRow(
+                    stringResource(R.string.car_warn_location),
+                    listOf(false to stringResource(R.string.off), true to stringResource(R.string.on)),
+                    locationWarning,
+                ) { CarSettings.setLocationWarning(it) }
+            }
+
+            if (section == chosen) item {
+                ChoiceRow(
+                    stringResource(R.string.car_spoken_directions),
+                    listOf(false to stringResource(R.string.off), true to stringResource(R.string.on)),
+                    speakDirections,
+                ) { CarSettings.setSpeakDirections(it) }
+            }
+
+            if (section == chosen) item {
+                Text(
+                    stringResource(R.string.carset_directions_note),
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+
+            if (section == chosen && speakDirections) item {
+                ChoiceRow(
+                    stringResource(R.string.car_directions_over_music),
+                    listOf(false to stringResource(R.string.off), true to stringResource(R.string.on)),
+                    directionsOverMusic,
+                ) { CarSettings.setDirectionsOverMusic(it) }
+            }
+
+            if (section == chosen && speakDirections) item {
+                Text(
+                    stringResource(R.string.car_directions_over_music_note),
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+
+            if (section == chosen) item {
                 ExperimentalFeatureRow(
-                    "What's new after updates",
-                    "Show the list of changes once, the first time the car connects after an update.",
-                    whatsNew,
-                ) { CarSettings.setWhatsNewAfterUpdates(it) }
-                GsButton(onClick = CarSettings::openWhatsNew, tone = GsTone.Tonal, modifier = Modifier.height(56.dp)) {
-                    Text("What's new", style = MaterialTheme.typography.titleMedium)
+                    title = stringResource(R.string.car_phone_speech),
+                    description = stringResource(R.string.carset_phone_speech_note),
+                    checked = systemSpeech,
+                ) { CarSettings.setSystemSpeech(it) }
+            }
+
+            section = 4
+            if (section == chosen) item { Group(stringResource(R.string.car_group_more)) }
+
+            if (section == chosen) item {
+                WebPageSetting()
+            }
+
+            if (section == chosen) item {
+                ScreenFit(vehicle)
+            }
+
+            if (section == chosen) item {
+                ChoiceRow(
+                    stringResource(R.string.car_experimental),
+                    listOf(false to stringResource(R.string.carset_hide), true to stringResource(R.string.carset_show)),
+                    experimentalFeatures,
+                ) { CarSettings.setExperimentalFeaturesEnabled(it) }
+            }
+
+            if (section == chosen && experimentalFeatures) item {
+                ExperimentalFeaturesList(carSensors, adaptiveVideo, clusterVideo)
+            }
+
+            if (section == chosen) item {
+                Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {
+                    Text(stringResource(R.string.settings_connection), style = MaterialTheme.typography.titleMedium, color = MaterialTheme.colorScheme.primary)
+                    Info(stringResource(R.string.carset_phone), "${Build.MANUFACTURER} ${Build.MODEL}")
+                    Info(stringResource(R.string.carset_vehicle), vehicle.ifEmpty { "-" })
+                    Info(stringResource(R.string.carset_video), display.ifEmpty { "-" })
+                    Info(stringResource(R.string.settings_certificate), cert?.headline ?: stringResource(R.string.cert_checking))
+                }
+            }
+
+            if (section == chosen) item {
+                Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {
+                    Text(stringResource(R.string.settings_about), style = MaterialTheme.typography.titleMedium, color = MaterialTheme.colorScheme.primary)
+                    Info(stringResource(R.string.carset_version), app.seb3thehacker.gearslip.BuildConfig.VERSION_NAME)
+                    Info(stringResource(R.string.carset_build), app.seb3thehacker.gearslip.BuildConfig.VERSION_CODE.toString())
+                    ExperimentalFeatureRow(
+                        stringResource(R.string.carset_whats_new_after),
+                        stringResource(R.string.carset_whats_new_after_sub),
+                        whatsNew,
+                    ) { CarSettings.setWhatsNewAfterUpdates(it) }
+                    GsButton(onClick = CarSettings::openWhatsNew, tone = GsTone.Tonal, modifier = Modifier.height(56.dp)) {
+                        Text(stringResource(R.string.settings_whats_new), style = MaterialTheme.typography.titleMedium)
+                    }
                 }
             }
         }
@@ -328,6 +382,47 @@ private fun <T> ChoiceRow(title: String, options: List<Pair<T, String>>, selecte
     }
 }
 
+/** The groups, with the chosen one lit: a card down the left of Settings. */
+@Composable
+private fun SettingsRail(groups: List<String>, chosen: Int, onChoose: (Int) -> Unit) {
+    val scheme = MaterialTheme.colorScheme
+    val shape = RoundedCornerShape(24.dp)
+    Surface(
+        Modifier.width(250.dp).padding(bottom = 12.dp).fillMaxHeight().gsPanelShadow(shape),
+        shape = shape,
+        color = scheme.surfaceContainer,
+    ) {
+        Column(
+            Modifier.padding(10.dp).verticalScroll(androidx.compose.foundation.rememberScrollState()),
+            verticalArrangement = Arrangement.spacedBy(4.dp),
+        ) {
+            Text(
+                stringResource(R.string.settings_title),
+                style = MaterialTheme.typography.headlineSmall,
+                fontWeight = FontWeight.Bold,
+                modifier = Modifier.padding(start = 14.dp, top = 6.dp, bottom = 10.dp),
+            )
+            groups.forEachIndexed { i, name ->
+                val on = i == chosen
+                GsIconBox(
+                    onClick = { onChoose(i) },
+                    modifier = Modifier.fillMaxWidth().height(56.dp),
+                    colors = if (on) GsColors(scheme.primaryContainer, scheme.onPrimaryContainer)
+                    else GsColors(Color.Transparent, scheme.onSurface),
+                    latched = on,
+                ) {
+                    Text(
+                        name,
+                        style = MaterialTheme.typography.titleMedium,
+                        fontWeight = if (on) FontWeight.Bold else FontWeight.Normal,
+                        modifier = Modifier.fillMaxWidth().padding(horizontal = 16.dp),
+                    )
+                }
+            }
+        }
+    }
+}
+
 /** A group of settings: a heading, so a long list reads as a few short ones. */
 @Composable
 private fun Group(title: String) {
@@ -369,25 +464,26 @@ private fun <T> ChoiceButtons(options: List<Pair<T, String>>, selected: T, onSel
  * so the list reads fine whether there's one entry or several.
  */
 @Composable
-private fun ExperimentalFeaturesList(carSensors: Boolean, adaptiveVideo: Boolean) {
+private fun ExperimentalFeaturesList(carSensors: Boolean, adaptiveVideo: Boolean, clusterVideo: Boolean) {
     Column(
         Modifier.fillMaxWidth(),
         verticalArrangement = Arrangement.spacedBy(10.dp),
     ) {
         ExperimentalFeatureRow(
-            title = "Vehicle data",
-            description = "Adds a Vehicle data tile: a live, raw dump of the head unit's sensor " +
-                "channel. Field labels (speed, RPM, fuel...) are carried over from other " +
-                "reverse-engineering projects and unverified against this car - treat them as a " +
-                "guess, not a fact, until you've watched one change for yourself.",
+            title = stringResource(R.string.car_vehicle_data),
+            description = stringResource(R.string.carset_vehicle_data_note),
             checked = carSensors,
         ) { CarSettings.setCarSensorsEnabled(it) }
         ExperimentalFeatureRow(
-            title = "Adaptive video quality",
-            description = "Lowers the picture's quality when the car, or its Wi-Fi, can't keep " +
-                "up, and raises it again once it can. Takes effect on the next connection.",
+            title = stringResource(R.string.car_adaptive_video),
+            description = stringResource(R.string.carset_adaptive_note),
             checked = adaptiveVideo,
         ) { CarSettings.setAdaptiveVideoEnabled(it) }
+        ExperimentalFeatureRow(
+            title = stringResource(R.string.car_cluster_video),
+            description = stringResource(R.string.car_cluster_video_note),
+            checked = clusterVideo,
+        ) { CarSettings.setClusterVideoEnabled(it) }
     }
 }
 
@@ -433,7 +529,7 @@ private fun WebPageSetting() {
     var url by remember { mutableStateOf(AppSettings.startupUrl(context)) }
 
     Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {
-        Text("Web page", style = MaterialTheme.typography.titleMedium, color = MaterialTheme.colorScheme.primary)
+        Text(stringResource(R.string.web_page), style = MaterialTheme.typography.titleMedium, color = MaterialTheme.colorScheme.primary)
         Surface(
             onClick = { editing = !editing },
             shape = MaterialTheme.shapes.large,
@@ -441,7 +537,7 @@ private fun WebPageSetting() {
             modifier = Modifier.fillMaxWidth(),
         ) {
             Text(
-                url.ifEmpty { "DuckDuckGo (default) - tap to set a different page" },
+                url.ifEmpty { stringResource(R.string.carset_web_default) },
                 style = MaterialTheme.typography.bodyLarge,
                 color = if (url.isEmpty()) MaterialTheme.colorScheme.onSurfaceVariant else MaterialTheme.colorScheme.onSurface,
                 maxLines = 1,
@@ -450,7 +546,7 @@ private fun WebPageSetting() {
             )
         }
         Text(
-            "Shown by the Browser app on the launcher. Applies on the next connection.",
+            stringResource(R.string.carset_web_note),
             style = MaterialTheme.typography.bodySmall,
             color = MaterialTheme.colorScheme.onSurfaceVariant,
         )
@@ -493,22 +589,22 @@ private fun ScreenFit(vehicle: String) {
     }
 
     Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {
-        Text("Screen fit", style = MaterialTheme.typography.titleMedium, color = MaterialTheme.colorScheme.primary)
-        Stepper("Top", insets.top) { change(insets.copy(top = (insets.top + it).coerceAtLeast(0))) }
-        Stepper("Bottom", insets.bottom) { change(insets.copy(bottom = (insets.bottom + it).coerceAtLeast(0))) }
+        Text(stringResource(R.string.carset_screen_fit), style = MaterialTheme.typography.titleMedium, color = MaterialTheme.colorScheme.primary)
+        Stepper(stringResource(R.string.carset_top), insets.top) { change(insets.copy(top = (insets.top + it).coerceAtLeast(0))) }
+        Stepper(stringResource(R.string.carset_bottom), insets.bottom) { change(insets.copy(bottom = (insets.bottom + it).coerceAtLeast(0))) }
         Text(
-            "Usable height ${480 - insets.top - insets.bottom}px of 480",
+            stringResource(R.string.carset_usable_height, 480 - insets.top - insets.bottom),
             style = MaterialTheme.typography.bodyMedium,
             color = MaterialTheme.colorScheme.onSurfaceVariant,
         )
         GsButton(
             onClick = {
                 val ok = app.seb3thehacker.gearslip.VehicleProfiles.saveInsets(context, vehicle, insets)
-                saved = if (ok) "Saved to $vehicle" else "Could not save"
+                saved = if (ok) context.getString(R.string.carset_saved_to, vehicle) else context.getString(R.string.carset_save_failed)
             },
             enabled = known,
             modifier = Modifier.fillMaxWidth().height(56.dp),
-        ) { Text(if (known) "Save for this vehicle" else "No vehicle profile matched") }
+        ) { Text(if (known) stringResource(R.string.carset_save_vehicle) else stringResource(R.string.carset_no_profile)) }
         saved?.let { Text(it, style = MaterialTheme.typography.bodyMedium) }
     }
 }
@@ -520,7 +616,7 @@ private fun Stepper(label: String, value: Int, onStep: (Int) -> Unit) {
         StepButton("−5", Modifier.weight(1f)) { onStep(-5) }
         StepButton("−1", Modifier.weight(1f)) { onStep(-1) }
         Text(
-            "${value}px",
+            stringResource(R.string.carset_px, value),
             style = MaterialTheme.typography.titleLarge,
             modifier = Modifier.weight(1.3f),
             textAlign = androidx.compose.ui.text.style.TextAlign.Center,

gearslip/src/main/java/app/seb3thehacker/gearslip/car/CarUi.kt

@@ -1,5 +1,6 @@
 package app.seb3thehacker.gearslip.car
 
+import androidx.compose.ui.res.stringResource
 import androidx.compose.material.icons.filled.Call
 import app.seb3thehacker.gearslip.call.CarCalls
 import app.seb3thehacker.gearslip.call.CallUiState
@@ -62,6 +63,8 @@ import androidx.compose.runtime.setValue
 import androidx.compose.animation.animateContentSize
 import android.media.session.PlaybackState
 import androidx.compose.runtime.remember
+import androidx.compose.runtime.SideEffect
+import androidx.compose.ui.graphics.graphicsLayer
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
@@ -110,6 +113,7 @@ fun CarUi() {
     val phoneDark by CarEnvironment.phoneDark.collectAsState()
     val appTheme by CarSettings.appTheme.collectAsState()
     val uiThemeId by CarSettings.uiTheme.collectAsState()
+    val darkStyle by CarSettings.darkStyle.collectAsState()
     val mediaApp by CarServices.mediaApp.collectAsState()
     val darkOutside by CarEnvironment.darkOutside.collectAsState()
     val appContext = LocalContext.current.applicationContext
@@ -118,10 +122,15 @@ fun CarUi() {
         AppTheme.LIGHT -> false
         AppTheme.DARK -> true
     }
-    val colors = (if (dark) dynamicDarkColorScheme(appContext) else dynamicLightColorScheme(appContext)).withTintedSurfaces(dark)
+    val colors = (if (dark) dynamicDarkColorScheme(appContext) else dynamicLightColorScheme(appContext)).withTintedSurfaces(dark, darkStyle)
     val base = LocalDensity.current
     val insets by CarEnvironment.insets.collectAsState()
-    val navigator = remember { CarNavigator(CarSettings.openOnConnect.value) }
+    val navigator = remember {
+        // A start screen picked for the car may be one launcher mode hides, like Screen sharing.
+        val start = CarSettings.openOnConnect.value
+        val shown = CarApps.shown(LauncherMode.active.value, LauncherMode.canCall(appContext)).any { it.id == start }
+        CarNavigator(if (shown) start else CarSettings.HOME)
+    }
     val controlsWake = remember { MapControlsWake() }
     LaunchedEffect(controlsWake) {
         while (true) {
@@ -222,8 +231,10 @@ fun CarUi() {
                     },
                 color = MaterialTheme.colorScheme.background,
             ) {
-                // Insets are in video-frame pixels, so convert with the un-scaled density.
-                val pad = with(base) {
+                // Insets are video-frame pixels. Resolve them with the live (size-scaled) density,
+                // which padding() also uses, so the safe-area margin stays one fixed physical size
+                // at every size setting instead of growing with it and eating the screen's sides.
+                val pad = with(LocalDensity.current) {
                     PaddingValues(
                         start = insets.left.toDp(), top = insets.top.toDp(),
                         end = insets.right.toDp(), bottom = insets.bottom.toDp(),
@@ -232,12 +243,11 @@ fun CarUi() {
                 val screen = navigator.current
                 val safetyWarningSeen by CarSettings.hasSeenSafetyWarning.collectAsState()
                 val keyboardVisible by CarKeyboardVisibility.state
-                // Off "Always show", the bar floats over the map rather than taking a row of its
-                // own: hiding it then leaves the map's surface the size it was. Resizing it would
-                // hand the map app a new surface each time, and some go black on that.
+                // The bar always lies over the map and every other screen rather than taking a row
+                // of its own: hiding it then leaves the map's surface the size it was.
+                // Resizing it would hand the map app a new surface each time, and some go black on that.
                 val navBarMode by CarSettings.navBarMode.collectAsState()
                 val appTemplate by CarServices.nav.template.collectAsState()
-                val floatingBar = navBarMode != NavBarMode.SHOW
                 val barMayHide = screen == CarScreen.Home && when (navBarMode) {
                     NavBarMode.SHOW -> false
                     NavBarMode.HIDE_NAVIGATING -> appTemplate is androidx.car.app.navigation.model.NavigationTemplate
@@ -248,7 +258,8 @@ fun CarUi() {
                 // A call keeps the bar up whatever the setting: End and Mute live on it.
                 val onCall = CarCalls.state.collectAsState().value is CallUiState.Active
                 val barShown = !keyboardVisible && (!barMayHide || controlsWake.navBarAwake || onCall)
-                val homeInset = if (floatingBar && barShown) NAV_BAR_HEIGHT else 0.dp
+                // Up to the bar's top edge, so the map's cards and the player end above it.
+                val homeInset = if (barShown) NAV_BAR_HEIGHT else 0.dp
                 // Only the screen that asked: going Home or anywhere else ends it.
                 val fullscreen = CarFullscreen.active && screen != CarScreen.Home
                 Box(Modifier.fillMaxSize().padding(pad)) {
@@ -268,43 +279,58 @@ fun CarUi() {
                     // The keyboard takes the nav bar's row instead of squeezing in above it -
                     // nothing on the nav bar is useful mid-type, and the screen is too small to
                     // show both.
-                    if (!floatingBar && !keyboardVisible) CarNavBar(navigator)
                 }
                 // Every other screen, and everything that pops up, in a layer over Home rather
                 // than inside its area: full screen grows this layer over the nav bar's row while
                 // Home, and the map's surface in it, keeps its size.
+                // Each new screen fades in while rising a little, once, over a fifth of a second.
+                // Coming from Home the backdrop fades in with it, over the map; between two other
+                // screens it stays put, so the map never flashes through.
+                val lastScreen = remember { arrayOf<CarScreen>(CarScreen.Home) }
+                val fromHome = remember(screen) { lastScreen[0] == CarScreen.Home }
+                SideEffect { lastScreen[0] = screen }
+                val enter = remember(screen) { androidx.compose.animation.core.Animatable(0f) }
+                LaunchedEffect(screen) { enter.animateTo(1f, androidx.compose.animation.core.tween(180)) }
                 if (safetyWarningSeen) {
-                    Box(
-                        Modifier
-                            .fillMaxSize()
-                            .padding(bottom = if (!floatingBar && !keyboardVisible && !fullscreen) NAV_BAR_HEIGHT else 0.dp),
-                    ) {
+                    Box(Modifier.fillMaxSize()) {
                         if (screen != CarScreen.Home) {
                             Box(
                                 Modifier
                                     .fillMaxSize()
+                                    .graphicsLayer { if (fromHome) alpha = enter.value }
                                     .background(MaterialTheme.colorScheme.background)
-                                    // The floating bar never hides here, so keep the screen clear of it.
-                                    .padding(bottom = if (floatingBar && !keyboardVisible && !fullscreen) NAV_BAR_HEIGHT else 0.dp)
+                                    // The bar never hides here, so keep the screen clear of it. The
+                                    // player runs on under the see-through bar and keeps clear itself.
+                                    .padding(bottom = if (!keyboardVisible && !fullscreen && screen != CarScreen.Media) NAV_BAR_HEIGHT else 0.dp)
                                     // Keeps touches that miss this screen's controls off the map.
                                     .pointerInput(Unit) { detectTapGestures { } },
                             ) {
-                                when (screen) {
-                                    CarScreen.Home -> Unit
-                                    CarScreen.Apps -> CarLauncher()
-                                    CarScreen.Media -> mediaApp?.let { MediaScreen(it) { navigator.back() } }
-                                    CarScreen.Browse -> BrowseAppScreen(navigator)
-                                    CarScreen.Settings -> CarSettingsScreen()
-                                    CarScreen.Dashboard -> CarDashboardScreen()
-                                    CarScreen.Weather -> WeatherScreen()
-                                    CarScreen.VehicleData -> VehicleDataScreen()
-                                    is CarScreen.Notifications -> NotificationsScreen(screen.replyTo)
-                                    is CarScreen.Messages -> MessagesScreen(screen.packageName)
-                                    is CarScreen.App -> CarApps.find(screen.id)?.content?.invoke()
+                                Box(
+                                    Modifier.fillMaxSize().graphicsLayer {
+                                        if (!fromHome) alpha = enter.value
+                                        translationY = (1f - enter.value) * 16.dp.toPx()
+                                    },
+                                ) {
+                                    when (screen) {
+                                        CarScreen.Home -> Unit
+                                        CarScreen.Apps -> CarLauncher()
+                                        CarScreen.Media -> CompositionLocalProvider(
+                                            LocalNavBarInset provides if (!keyboardVisible && !fullscreen) NAV_BAR_HEIGHT else 0.dp,
+                                        ) { mediaApp?.let { MediaScreen(it) { navigator.back() } } }
+                                        CarScreen.Browse -> BrowseAppScreen(navigator)
+                                        CarScreen.Settings -> CarSettingsScreen()
+                                        CarScreen.Dashboard -> CarDashboardScreen()
+                                        CarScreen.Weather -> WeatherScreen()
+                                        CarScreen.VehicleData -> VehicleDataScreen()
+                                        is CarScreen.Notifications -> NotificationsScreen(screen.replyTo)
+                                        is CarScreen.Messages -> MessagesScreen(screen.packageName)
+                                        is CarScreen.App -> CarApps.find(screen.id)?.content?.invoke()
+                                    }
                                 }
                             }
                         }
                         CarToastOverlay(Modifier.align(Alignment.BottomCenter).padding(bottom = homeInset))
+                        CarAlertOverlay(Modifier.align(Alignment.TopCenter))
                         CallPromptOverlay()
                         BluetoothPairOverlay()
                         PopupTimer()
@@ -325,7 +351,7 @@ fun CarUi() {
                             // whatever the screen drew there.
                             DebugBuildBadge(Modifier.align(Alignment.BottomEnd).padding(bottom = homeInset))
                         }
-                        if (floatingBar || fullscreen) {
+                        run {
                             androidx.compose.animation.AnimatedVisibility(
                                 if (fullscreen) CarFullscreen.revealed || onCall else barShown,
                                 Modifier.align(Alignment.BottomCenter),
@@ -343,7 +369,7 @@ fun CarUi() {
                                 GsButton(onClick = CarFullscreen::exit, modifier = Modifier.height(48.dp)) {
                                     Icon(MediaIcons.FullscreenExit, contentDescription = null, modifier = Modifier.size(22.dp))
                                     Spacer(Modifier.width(8.dp))
-                                    Text("Exit full screen", style = MaterialTheme.typography.titleMedium)
+                                    Text(stringResource(R.string.carui_exit_fullscreen), style = MaterialTheme.typography.titleMedium)
                                 }
                             }
                         }
@@ -388,22 +414,20 @@ private fun CarSafetyWizard(onDone: () -> Unit) {
                 modifier = Modifier.fillMaxWidth(),
             ) {
                 Column(Modifier.padding(24.dp), verticalArrangement = Arrangement.spacedBy(12.dp)) {
-                    Text("Drive safely", style = ChromeType.headline, fontWeight = FontWeight.Bold)
+                    Text(stringResource(R.string.carui_drive_safely), style = ChromeType.headline, fontWeight = FontWeight.Bold)
                     Text(
-                        "Gearslip is unofficial software: it is not made or reviewed by any " +
-                            "carmaker, and it can fail without warning.",
+                        stringResource(R.string.carui_unofficial),
                         style = ChromeType.body,
                     )
                     Text(
-                        "Never interact with this screen while driving. Set the route or the " +
-                            "song before you go, then keep your attention on the road.",
+                        stringResource(R.string.carui_never_interact),
                         style = ChromeType.body,
                     )
                 }
             }
             Spacer(Modifier.height(24.dp))
             GsButton(onClick = onDone, modifier = Modifier.fillMaxWidth().height(56.dp)) {
-                Text("I understand", style = ChromeType.body)
+                Text(stringResource(R.string.carui_understand), style = ChromeType.body)
             }
         }
     }
@@ -434,7 +458,7 @@ private fun BrowseAppScreen(navigator: CarNavigator) {
     }
     val failed = status.phase == CarAppConnection.Phase.REJECTED || status.phase == CarAppConnection.Phase.FAILED
     if (failed || timedOut) {
-        AppWontStart(status.app ?: "This app", leave)
+        AppWontStart(status.app ?: stringResource(R.string.carui_this_app), leave)
         return
     }
     CarAppStage(CarServices.browse, status, frame, onDisconnect = leave)
@@ -450,13 +474,13 @@ private fun AppWontStart(app: String, onBack: () -> Unit) {
         verticalArrangement = Arrangement.spacedBy(12.dp, Alignment.CenterVertically),
         horizontalAlignment = Alignment.CenterHorizontally,
     ) {
-        Text("$app doesn't work with Gearslip yet.", style = MaterialTheme.typography.titleLarge, fontWeight = FontWeight.SemiBold)
+        Text(stringResource(R.string.carui_app_unsupported, app), style = MaterialTheme.typography.titleLarge, fontWeight = FontWeight.SemiBold)
         Text(
-            "It didn't start. Some apps only run on Google's Android Auto.",
+            stringResource(R.string.carui_app_unsupported_body),
             style = MaterialTheme.typography.bodyLarge,
             color = MaterialTheme.colorScheme.onSurfaceVariant,
         )
-        GsButton(onClick = onBack, tone = GsTone.Tonal) { Text("Back") }
+        GsButton(onClick = onBack, tone = GsTone.Tonal) { Text(stringResource(R.string.back)) }
     }
 }
 

gearslip/src/main/java/app/seb3thehacker/gearslip/car/CarWhatsNew.kt

@@ -1,5 +1,7 @@
 package app.seb3thehacker.gearslip.car
 
+import androidx.compose.ui.res.stringResource
+import app.seb3thehacker.gearslip.R
 import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.interaction.MutableInteractionSource
@@ -76,7 +78,7 @@ fun CarWhatsNew() {
         ) {
             Column(Modifier.padding(20.dp), verticalArrangement = Arrangement.spacedBy(14.dp)) {
                 Text(
-                    "What's new in ${release.versionName}",
+                    stringResource(R.string.whatsnew_title, release.versionName),
                     style = MaterialTheme.typography.headlineSmall,
                     fontWeight = FontWeight.Bold,
                 )
@@ -99,12 +101,12 @@ fun CarWhatsNew() {
                 Row(verticalAlignment = Alignment.CenterVertically, horizontalArrangement = Arrangement.spacedBy(14.dp)) {
                     GsSwitch(afterUpdates, CarSettings::setWhatsNewAfterUpdates)
                     Text(
-                        "Show after updates",
+                        stringResource(R.string.whatsnew_show_after),
                         style = MaterialTheme.typography.titleMedium,
                         modifier = Modifier.weight(1f),
                     )
                     GsButton(onClick = close, modifier = Modifier.height(56.dp)) {
-                        Text("Got it", style = MaterialTheme.typography.titleMedium)
+                        Text(stringResource(R.string.whatsnew_got_it), style = MaterialTheme.typography.titleMedium)
                     }
                 }
             }

gearslip/src/main/java/app/seb3thehacker/gearslip/car/ClusterNav.kt

@@ -8,6 +8,7 @@ import androidx.car.app.navigation.model.RoutingInfo
 import androidx.car.app.navigation.model.Step
 import app.seb3thehacker.gearslip.GearslipLog
 import app.seb3thehacker.gearslip.Protobuf
+import app.seb3thehacker.gearslip.notify.PhoneNavigation
 
 /**
  * The next turn on the car's instrument cluster, over its NavigationStatusService (Service
@@ -200,6 +201,14 @@ internal class NavTurn(val step: Step, val distance: Distance?, val seconds: Lon
         /** The map app's next turn: from its trip (what clusters get), or its routing card. */
         fun current(): NavTurn? {
             val nav = CarServices.navOrNull() ?: return null
+            hosted(nav)?.let { return it }
+            // Google Maps or Waze guiding on the phone, when no map in the car is.
+            val phone = PhoneNavigation.turn.value ?: return null
+            val step = Step.Builder(phone.road).setManeuver(Maneuver.Builder(phone.maneuver).build()).build()
+            return NavTurn(step, phone.distance, null, false)
+        }
+
+        private fun hosted(nav: app.seb3thehacker.gearslip.host.CarAppConnection): NavTurn? {
             nav.trip.value?.let { trip ->
                 val step = trip.steps.firstOrNull() ?: return@let
                 val estimate = trip.stepTravelEstimates.firstOrNull()

gearslip/src/main/java/app/seb3thehacker/gearslip/car/ClusterScreen.kt

@@ -0,0 +1,140 @@
+package app.seb3thehacker.gearslip.car
+
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.BoxWithConstraints
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.width
+import androidx.compose.material3.LocalContentColor
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.material3.darkColorScheme
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.CompositionLocalProvider
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.produceState
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.platform.LocalDensity
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.unit.dp
+import app.seb3thehacker.gearslip.host.clockTime
+import app.seb3thehacker.gearslip.host.display
+import app.seb3thehacker.gearslip.host.remainingTime
+import kotlinx.coroutines.delay
+
+/**
+ * The instrument-cluster screen: the next turn, big enough to read in a glance past the wheel.
+ * The arrow and the distance to it, what to do there, and the time, distance and arrival left
+ * along the bottom. With no route it shows what's playing, quietly, or nothing.
+ *
+ * Always dark, like the dials around it. [marginX] and [marginY] are the pixels the car crops off
+ * the frame, kept clear.
+ */
+@Composable
+internal fun ClusterScreen(marginX: Int, marginY: Int) {
+    // The map app's turn changes a few times a minute: read it once a second.
+    val turn by produceState<ClusterTurn?>(null) {
+        while (true) {
+            value = ClusterTurn.now()
+            delay(1_000)
+        }
+    }
+    val density = LocalDensity.current
+    MaterialTheme(colorScheme = darkColorScheme()) {
+        CompositionLocalProvider(LocalContentColor provides Color.White) {
+            BoxWithConstraints(
+                Modifier.fillMaxSize().background(Color.Black).padding(
+                    horizontal = with(density) { (marginX / 2).toDp() } + 24.dp,
+                    vertical = with(density) { (marginY / 2).toDp() } + 16.dp,
+                ),
+                contentAlignment = Alignment.CenterStart,
+            ) {
+                // Sized off the height: clusters run from short strips to near squares.
+                val unit = maxHeight / 12
+                val t = turn
+                if (t == null) {
+                    NowPlayingLine(Modifier.align(Alignment.Center))
+                    return@BoxWithConstraints
+                }
+                Column(verticalArrangement = Arrangement.spacedBy(unit * 0.4f)) {
+                    Row(verticalAlignment = Alignment.CenterVertically) {
+                        CarGlyph(t.icon, Modifier.size(unit * 3.4f))
+                        Spacer(Modifier.width(unit))
+                        Text(
+                            t.distance,
+                            fontSize = with(density) { (unit * 2.2f).toSp() },
+                            fontWeight = FontWeight.Bold,
+                            maxLines = 1,
+                        )
+                    }
+                    if (t.what.isNotEmpty()) {
+                        Text(
+                            t.what,
+                            fontSize = with(density) { (unit * 1.1f).toSp() },
+                            fontWeight = FontWeight.SemiBold,
+                            maxLines = 2,
+                            overflow = TextOverflow.Ellipsis,
+                        )
+                    }
+                    if (t.trip.isNotEmpty()) {
+                        Text(
+                            t.trip,
+                            fontSize = with(density) { (unit * 0.85f).toSp() },
+                            color = Color.White.copy(alpha = 0.7f),
+                            maxLines = 1,
+                        )
+                    }
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun NowPlayingLine(modifier: Modifier) {
+    val now = CarServices.mediaOrNull()?.now?.value
+    if (now == null || now.title.isEmpty()) return
+    Text(
+        listOf(now.title, now.artist).filter { it.isNotEmpty() }.joinToString(" · "),
+        modifier,
+        style = MaterialTheme.typography.titleLarge,
+        color = Color.White.copy(alpha = 0.7f),
+        maxLines = 1,
+        overflow = TextOverflow.Ellipsis,
+    )
+}
+
+/** What the cluster shows of a route, read from [NavTurn] and the trip's estimate to the destination. */
+private class ClusterTurn(
+    val icon: androidx.car.app.model.CarIcon?,
+    val distance: String,
+    val what: String,
+    val trip: String,
+) {
+    companion object {
+        fun now(): ClusterTurn? {
+            val turn = NavTurn.current() ?: return null
+            if (turn.rerouting) return null
+            val step = turn.step
+            val cue = step.cue?.toString().orEmpty()
+            val what = cue.ifEmpty { step.road?.toString().orEmpty() }
+            val estimate = CarServices.navOrNull()?.trip?.value?.destinationTravelEstimates?.firstOrNull()
+            val trip = estimate?.let { e ->
+                listOf(
+                    e.remainingTimeSeconds.takeIf { it >= 0 }?.let { remainingTime(it) }.orEmpty(),
+                    e.remainingDistance.display(),
+                    e.arrivalTimeAtDestination.clockTime(),
+                ).filter { it.isNotEmpty() }.joinToString(" · ")
+            }.orEmpty()
+            return ClusterTurn(step.maneuver?.icon, turn.distance.display(), what, trip)
+        }
+    }
+}

gearslip/src/main/java/app/seb3thehacker/gearslip/car/DirectionsVoice.kt

@@ -1,7 +1,11 @@
 package app.seb3thehacker.gearslip.car
 
+import app.seb3thehacker.gearslip.R
 import android.content.Context
 import android.os.Bundle
+import android.os.Handler
+import android.os.Looper
+import android.os.SystemClock
 import android.speech.tts.TextToSpeech
 import android.speech.tts.UtteranceProgressListener
 import androidx.car.app.model.CarText
@@ -10,6 +14,7 @@ import androidx.car.app.navigation.model.Maneuver
 import androidx.car.app.navigation.model.Step
 import app.seb3thehacker.gearslip.GearslipLog
 import app.seb3thehacker.gearslip.audio.AudioLink
+import app.seb3thehacker.gearslip.audio.CarAudio
 import java.io.File
 import java.nio.ByteBuffer
 import java.nio.ByteOrder
@@ -39,11 +44,16 @@ object DirectionsVoice {
     private var appContext: Context? = null
     private var tts: TextToSpeech? = null
     @Volatile private var ttsReady = false
+    /** When the engine was last started; one not ready by [RESTART_MS] later gets another try. */
+    @Volatile private var ttsStartedAt = 0L
     private val pending = ConcurrentHashMap<String, CountDownLatch>()
+    private val main = Handler(Looper.getMainLooper())
 
     @Volatile private var link: AudioLink? = null
     @Volatile private var running = false
     @Volatile private var musicIsOurs: () -> Boolean = { false }
+    /** The car's music sink once it's set up, for [CarSettings.directionsOverMusic]. */
+    @Volatile private var musicSink: () -> AudioLink? = { null }
     private val speaker = Executors.newSingleThreadScheduledExecutor { Thread(it, "gearslip-directions").apply { isDaemon = true } }
     /** Counts announcements, so a hand-back scheduled after one is dropped if another has begun. */
     private var spoken = 0
@@ -55,7 +65,19 @@ object DirectionsVoice {
     fun init(context: Context) {
         if (tts != null) return
         appContext = context.applicationContext
-        tts = TextToSpeech(appContext) { status -> ttsReady = status == TextToSpeech.SUCCESS }.apply {
+        start()
+    }
+
+    private fun start() {
+        ttsReady = false
+        ttsStartedAt = SystemClock.elapsedRealtime()
+        tts = TextToSpeech(appContext) { status ->
+            ttsReady = status == TextToSpeech.SUCCESS
+            if (!ttsReady) GearslipLog.w("guidance: text-to-speech didn't start (status $status)")
+            // The turns are worded in Gearslip's language; the engine's default voice may be
+            // another one, and read German words with an English voice (issue #70).
+            else speakIn(appContext?.resources?.configuration?.locales?.get(0))
+        }.apply {
             setOnUtteranceProgressListener(object : UtteranceProgressListener() {
                 override fun onStart(utteranceId: String?) {}
                 override fun onDone(utteranceId: String?) { pending.remove(utteranceId)?.countDown() }
@@ -65,10 +87,21 @@ object DirectionsVoice {
         }
     }
 
+    /** Keeps the engine's own voice when it has none for [locale]. */
+    private fun speakIn(locale: java.util.Locale?) {
+        val engine = tts ?: return
+        locale ?: return
+        val result = engine.setLanguage(locale)
+        if (result == TextToSpeech.LANG_MISSING_DATA || result == TextToSpeech.LANG_NOT_SUPPORTED) {
+            GearslipLog.w("guidance: the speech engine has no ${locale.displayLanguage} voice - using its default")
+        }
+    }
+
     /** The car opened its directions sink: start following the map app's turns. */
-    fun attach(link: AudioLink, musicIsOurs: () -> Boolean) {
+    fun attach(link: AudioLink, musicIsOurs: () -> Boolean, musicSink: () -> AudioLink? = { null }) {
         this.link = link
         this.musicIsOurs = musicIsOurs
+        this.musicSink = musicSink
         GearslipLog.i("guidance: the car offered a directions sink at ${link.sampleRate}Hz x${link.channels}")
         if (running) return
         running = true
@@ -121,7 +154,7 @@ object DirectionsVoice {
                 say(instruction)
                 stage = Stage.DONE
             } else {
-                say("In ${spoken(turn.distance)}, $instruction")
+                say(ahead(turn.distance, instruction))
                 stage = if (meters != null && meters > PREPARE_FROM_METERS) Stage.FAR else Stage.PREPARED
             }
             return
@@ -132,7 +165,7 @@ object DirectionsVoice {
                 stage = Stage.DONE
             }
             stage == Stage.FAR && meters != null && meters <= PREPARE_AT_METERS -> {
-                say("In ${spoken(turn.distance)}, $instruction")
+                say(ahead(turn.distance, instruction))
                 stage = Stage.PREPARED
             }
         }
@@ -140,67 +173,79 @@ object DirectionsVoice {
 
     /** What to do, in words: built from the manoeuvre when the app names one, else the app's own text. */
     private fun instruction(step: Step): String? {
+        val res = appContext?.resources ?: return null
         val road = step.road.text()
-        val onto = if (road.isBlank()) "" else " onto $road"
-        val toward = if (road.isBlank()) "" else " toward $road"
+        // Each manoeuvre is a whole sentence, with and without the road, so a translation can
+        // put the road wherever its language wants it.
+        fun say(plain: Int, withRoad: Int) =
+            if (road.isBlank() || withRoad == 0) res.getString(plain) else res.getString(withRoad, road)
         val maneuver = step.maneuver
         val built = when (maneuver?.type) {
-            Maneuver.TYPE_TURN_SLIGHT_LEFT -> "Turn slightly left$onto"
-            Maneuver.TYPE_TURN_SLIGHT_RIGHT -> "Turn slightly right$onto"
-            Maneuver.TYPE_TURN_NORMAL_LEFT -> "Turn left$onto"
-            Maneuver.TYPE_TURN_NORMAL_RIGHT -> "Turn right$onto"
-            Maneuver.TYPE_TURN_SHARP_LEFT -> "Turn sharply left$onto"
-            Maneuver.TYPE_TURN_SHARP_RIGHT -> "Turn sharply right$onto"
-            Maneuver.TYPE_U_TURN_LEFT, Maneuver.TYPE_U_TURN_RIGHT -> "Make a U-turn"
-            Maneuver.TYPE_KEEP_LEFT -> "Keep left$toward"
-            Maneuver.TYPE_KEEP_RIGHT -> "Keep right$toward"
-            Maneuver.TYPE_FORK_LEFT -> "Keep left at the fork$toward"
-            Maneuver.TYPE_FORK_RIGHT -> "Keep right at the fork$toward"
+            Maneuver.TYPE_TURN_SLIGHT_LEFT -> say(R.string.dir_slight_left, R.string.dir_slight_left_onto)
+            Maneuver.TYPE_TURN_SLIGHT_RIGHT -> say(R.string.dir_slight_right, R.string.dir_slight_right_onto)
+            Maneuver.TYPE_TURN_NORMAL_LEFT -> say(R.string.dir_left, R.string.dir_left_onto)
+            Maneuver.TYPE_TURN_NORMAL_RIGHT -> say(R.string.dir_right, R.string.dir_right_onto)
+            Maneuver.TYPE_TURN_SHARP_LEFT -> say(R.string.dir_sharp_left, R.string.dir_sharp_left_onto)
+            Maneuver.TYPE_TURN_SHARP_RIGHT -> say(R.string.dir_sharp_right, R.string.dir_sharp_right_onto)
+            Maneuver.TYPE_U_TURN_LEFT, Maneuver.TYPE_U_TURN_RIGHT -> say(R.string.dir_u_turn, 0)
+            Maneuver.TYPE_KEEP_LEFT -> say(R.string.dir_keep_left, R.string.dir_keep_left_toward)
+            Maneuver.TYPE_KEEP_RIGHT -> say(R.string.dir_keep_right, R.string.dir_keep_right_toward)
+            Maneuver.TYPE_FORK_LEFT -> say(R.string.dir_fork_left, R.string.dir_fork_left_toward)
+            Maneuver.TYPE_FORK_RIGHT -> say(R.string.dir_fork_right, R.string.dir_fork_right_toward)
             Maneuver.TYPE_ON_RAMP_SLIGHT_LEFT, Maneuver.TYPE_ON_RAMP_NORMAL_LEFT, Maneuver.TYPE_ON_RAMP_SHARP_LEFT,
-            Maneuver.TYPE_ON_RAMP_U_TURN_LEFT -> "Take the ramp on the left$onto"
+            Maneuver.TYPE_ON_RAMP_U_TURN_LEFT -> say(R.string.dir_ramp_left, R.string.dir_ramp_left_onto)
             Maneuver.TYPE_ON_RAMP_SLIGHT_RIGHT, Maneuver.TYPE_ON_RAMP_NORMAL_RIGHT, Maneuver.TYPE_ON_RAMP_SHARP_RIGHT,
-            Maneuver.TYPE_ON_RAMP_U_TURN_RIGHT -> "Take the ramp on the right$onto"
-            Maneuver.TYPE_OFF_RAMP_SLIGHT_LEFT, Maneuver.TYPE_OFF_RAMP_NORMAL_LEFT -> "Take the exit on the left$toward"
-            Maneuver.TYPE_OFF_RAMP_SLIGHT_RIGHT, Maneuver.TYPE_OFF_RAMP_NORMAL_RIGHT -> "Take the exit on the right$toward"
-            Maneuver.TYPE_MERGE_LEFT -> "Merge left$onto"
-            Maneuver.TYPE_MERGE_RIGHT -> "Merge right$onto"
-            Maneuver.TYPE_MERGE_SIDE_UNSPECIFIED -> "Merge$onto"
+            Maneuver.TYPE_ON_RAMP_U_TURN_RIGHT -> say(R.string.dir_ramp_right, R.string.dir_ramp_right_onto)
+            Maneuver.TYPE_OFF_RAMP_SLIGHT_LEFT, Maneuver.TYPE_OFF_RAMP_NORMAL_LEFT -> say(R.string.dir_exit_left, R.string.dir_exit_left_toward)
+            Maneuver.TYPE_OFF_RAMP_SLIGHT_RIGHT, Maneuver.TYPE_OFF_RAMP_NORMAL_RIGHT -> say(R.string.dir_exit_right, R.string.dir_exit_right_toward)
+            Maneuver.TYPE_MERGE_LEFT -> say(R.string.dir_merge_left, R.string.dir_merge_left_onto)
+            Maneuver.TYPE_MERGE_RIGHT -> say(R.string.dir_merge_right, R.string.dir_merge_right_onto)
+            Maneuver.TYPE_MERGE_SIDE_UNSPECIFIED -> say(R.string.dir_merge, R.string.dir_merge_onto)
             Maneuver.TYPE_ROUNDABOUT_ENTER_AND_EXIT_CW, Maneuver.TYPE_ROUNDABOUT_ENTER_AND_EXIT_CW_WITH_ANGLE,
             Maneuver.TYPE_ROUNDABOUT_ENTER_AND_EXIT_CCW, Maneuver.TYPE_ROUNDABOUT_ENTER_AND_EXIT_CCW_WITH_ANGLE ->
                 maneuver.roundaboutExitNumber.takeIf { it in 1..ORDINALS.size }
-                    ?.let { "At the roundabout, take the ${ORDINALS[it - 1]} exit$onto" }
-                    ?: "Go through the roundabout$onto"
-            Maneuver.TYPE_ROUNDABOUT_ENTER_CW, Maneuver.TYPE_ROUNDABOUT_ENTER_CCW -> "Enter the roundabout"
-            Maneuver.TYPE_ROUNDABOUT_EXIT_CW, Maneuver.TYPE_ROUNDABOUT_EXIT_CCW -> "Exit the roundabout$onto"
-            Maneuver.TYPE_STRAIGHT -> "Continue straight$onto"
-            Maneuver.TYPE_NAME_CHANGE -> "Continue$onto"
-            Maneuver.TYPE_FERRY_BOAT, Maneuver.TYPE_FERRY_BOAT_LEFT, Maneuver.TYPE_FERRY_BOAT_RIGHT -> "Take the ferry"
-            Maneuver.TYPE_FERRY_TRAIN, Maneuver.TYPE_FERRY_TRAIN_LEFT, Maneuver.TYPE_FERRY_TRAIN_RIGHT -> "Take the train"
-            Maneuver.TYPE_DESTINATION, Maneuver.TYPE_DESTINATION_STRAIGHT -> "Your destination is ahead"
-            Maneuver.TYPE_DESTINATION_LEFT -> "Your destination is on the left"
-            Maneuver.TYPE_DESTINATION_RIGHT -> "Your destination is on the right"
+                    ?.let { res.getString(ORDINALS[it - 1]) }
+                    ?.let { exit ->
+                        if (road.isBlank()) res.getString(R.string.dir_roundabout_take, exit)
+                        else res.getString(R.string.dir_roundabout_take_onto, exit, road)
+                    }
+                    ?: say(R.string.dir_roundabout_through, R.string.dir_roundabout_through_onto)
+            Maneuver.TYPE_ROUNDABOUT_ENTER_CW, Maneuver.TYPE_ROUNDABOUT_ENTER_CCW -> say(R.string.dir_roundabout_enter, 0)
+            Maneuver.TYPE_ROUNDABOUT_EXIT_CW, Maneuver.TYPE_ROUNDABOUT_EXIT_CCW -> say(R.string.dir_roundabout_exit, R.string.dir_roundabout_exit_onto)
+            Maneuver.TYPE_STRAIGHT -> say(R.string.dir_straight, R.string.dir_straight_onto)
+            Maneuver.TYPE_NAME_CHANGE -> say(R.string.dir_continue, R.string.dir_continue_onto)
+            Maneuver.TYPE_FERRY_BOAT, Maneuver.TYPE_FERRY_BOAT_LEFT, Maneuver.TYPE_FERRY_BOAT_RIGHT -> say(R.string.dir_ferry, 0)
+            Maneuver.TYPE_FERRY_TRAIN, Maneuver.TYPE_FERRY_TRAIN_LEFT, Maneuver.TYPE_FERRY_TRAIN_RIGHT -> say(R.string.dir_train, 0)
+            Maneuver.TYPE_DESTINATION, Maneuver.TYPE_DESTINATION_STRAIGHT -> say(R.string.dir_destination, 0)
+            Maneuver.TYPE_DESTINATION_LEFT -> say(R.string.dir_destination_left, 0)
+            Maneuver.TYPE_DESTINATION_RIGHT -> say(R.string.dir_destination_right, 0)
             else -> null
         }
         return built ?: step.cue.text().ifBlank { null }
     }
 
+    /** "In 300 meters, turn left": the distance ahead of a turn that isn't close yet. */
+    private fun ahead(d: Distance, instruction: String): String =
+        appContext?.getString(R.string.dir_in_distance, spoken(d), instruction) ?: instruction
+
     /** The app's own rounded distance, read the way a person would say it. */
     private fun spoken(d: Distance): String {
+        val res = appContext?.resources ?: return ""
         val n = d.displayDistance
-        val number = if (n % 1.0 == 0.0) n.toInt().toString() else "%.1f".format(n)
-        val one = n == 1.0
+        val whole = n % 1.0 == 0.0
+        val number = if (whole) n.toInt().toString() else "%.1f".format(n)
         return when (d.displayUnit) {
-            Distance.UNIT_KILOMETERS, Distance.UNIT_KILOMETERS_P1 -> if (one) "1 kilometer" else "$number kilometers"
+            Distance.UNIT_KILOMETERS, Distance.UNIT_KILOMETERS_P1 ->
+                if (whole) res.getQuantityString(R.plurals.dir_km, n.toInt(), number) else res.getString(R.string.dir_km_decimal, number)
             Distance.UNIT_MILES, Distance.UNIT_MILES_P1 -> when (n) {
-                0.25 -> "a quarter mile"
-                0.5 -> "half a mile"
-                0.75 -> "three quarters of a mile"
-                1.0 -> "1 mile"
-                else -> "$number miles"
+                0.25 -> res.getString(R.string.dir_quarter_mile)
+                0.5 -> res.getString(R.string.dir_half_mile)
+                0.75 -> res.getString(R.string.dir_three_quarter_mile)
+                else -> if (whole) res.getQuantityString(R.plurals.dir_miles, n.toInt(), number) else res.getString(R.string.dir_miles_decimal, number)
             }
-            Distance.UNIT_FEET -> "$number feet"
-            Distance.UNIT_YARDS -> "$number yards"
-            else -> "${n.roundToInt()} meters"
+            Distance.UNIT_FEET -> res.getQuantityString(R.plurals.dir_feet, n.toInt(), number)
+            Distance.UNIT_YARDS -> res.getQuantityString(R.plurals.dir_yards, n.toInt(), number)
+            else -> res.getQuantityString(R.plurals.dir_meters, n.roundToInt(), n.roundToInt())
         }
     }
 
@@ -219,6 +264,16 @@ object DirectionsVoice {
         val sink = link ?: return
         if (!ttsReady) {
             GearslipLog.w("guidance: text-to-speech isn't ready, a turn went unspoken")
+            // A failed or unanswered start was final, so one bad start silenced a whole drive
+            // (issue #35). Try again, once the last try has had its time.
+            if (SystemClock.elapsedRealtime() - ttsStartedAt > RESTART_MS) {
+                ttsStartedAt = SystemClock.elapsedRealtime()
+                GearslipLog.i("guidance: starting text-to-speech again")
+                main.post {
+                    runCatching { engine.shutdown() }
+                    start()
+                }
+            }
             return
         }
         val file = File(context.cacheDir, "directions.wav")
@@ -234,10 +289,16 @@ object DirectionsVoice {
             GearslipLog.w("guidance: text-to-speech took too long, a turn went unspoken")
             return
         }
-        val pcm = Wav.read(file)?.let { Wav.convert(it, sink.sampleRate, sink.channels) } ?: run {
+        val wav = Wav.read(file) ?: run {
             GearslipLog.w("guidance: text-to-speech gave audio Gearslip can't read")
             return
         }
+        val music = musicSink()
+        if (CarSettings.directionsOverMusic.value && music != null) {
+            speakOverMusic(music, Wav.convert(wav, music.sampleRate, music.channels))
+            return
+        }
+        val pcm = Wav.convert(wav, sink.sampleRate, sink.channels)
         // Logged before speaking too, so a car that dies mid-announcement shows what it was doing.
         GearslipLog.i("guidance: speaking a turn")
         // Held through back-to-back prompts rather than asked for and given back each time.
@@ -251,18 +312,44 @@ object DirectionsVoice {
         GearslipLog.i("guidance: spoke a turn (${pcm.size / (2 * sink.channels) * 1000 / sink.sampleRate} ms)")
     }
 
+    /**
+     * A 2025 Nissan's Bosch unit drops the link about a second after any turn on its directions
+     * channel while its music channel is open, and plays music through nothing else (issue #35).
+     * So the directions channel is left alone: the turn rides in the music, or, with no music
+     * playing, goes out on the music channel by itself.
+     */
+    private fun speakOverMusic(music: AudioLink, pcm: ByteArray) {
+        GearslipLog.i("guidance: speaking a turn over the music channel")
+        if (!CarAudio.speakOverMusic(pcm)) {
+            music.startForTurn()
+            try {
+                stream(music, pcm, alive = { musicSink() === music }, startAndStop = false)
+            } finally {
+                music.stopForTurn()
+                // Music that started during the turn found the stream running and didn't start its own.
+                if (CarAudio.capture.value == CarAudio.Capture.ON) music.start()
+            }
+        }
+        GearslipLog.i("guidance: spoke a turn over the music channel (${pcm.size / (2 * music.channels) * 1000 / music.sampleRate} ms)")
+    }
+
     /** Start, the words in 20 ms chunks at about real time, a little silence, Stop. */
-    private fun stream(sink: AudioLink, pcm: ByteArray) {
+    private fun stream(
+        sink: AudioLink,
+        pcm: ByteArray,
+        alive: () -> Boolean = { link === sink },
+        startAndStop: Boolean = true,
+    ) {
         val frame = 2 * sink.channels
         val chunk = sink.sampleRate / 50 * frame
         val chunkMs = 20L
         val padded = pcm + ByteArray(sink.sampleRate / 5 * frame) // 200 ms tail so the last word isn't clipped
-        sink.start()
+        if (startAndStop) sink.start()
         try {
             val began = System.currentTimeMillis()
             var offset = 0
             var sent = 0
-            while (offset < padded.size && link === sink) {
+            while (offset < padded.size && alive()) {
                 val size = minOf(chunk, padded.size - offset)
                 sink.write(padded.copyOfRange(offset, offset + size), size)
                 offset += size
@@ -273,7 +360,7 @@ object DirectionsVoice {
             // Let the car play what it has before closing the stream on it.
             Thread.sleep(LEAD_MS)
         } finally {
-            sink.stop()
+            if (startAndStop) sink.stop()
         }
     }
 
@@ -347,5 +434,9 @@ object DirectionsVoice {
     private const val LEAD_MS = 100L
     private const val HOLD_MS = 2_000L
     private const val SYNTH_TIMEOUT_S = 10L
-    private val ORDINALS = listOf("first", "second", "third", "fourth", "fifth", "sixth", "seventh", "eighth")
+    private const val RESTART_MS = 30_000L
+    private val ORDINALS = listOf(
+        R.string.dir_ordinal_1, R.string.dir_ordinal_2, R.string.dir_ordinal_3, R.string.dir_ordinal_4,
+        R.string.dir_ordinal_5, R.string.dir_ordinal_6, R.string.dir_ordinal_7, R.string.dir_ordinal_8,
+    )
 }

gearslip/src/main/java/app/seb3thehacker/gearslip/car/LauncherMode.kt

@@ -0,0 +1,79 @@
+package app.seb3thehacker.gearslip.car
+
+import android.app.ActivityOptions
+import android.content.ComponentName
+import android.content.Context
+import android.content.Intent
+import android.content.pm.PackageManager
+import android.os.Build
+import android.provider.Settings
+import android.view.Display
+import app.seb3thehacker.gearslip.GearslipLog
+import app.seb3thehacker.gearslip.LauncherActivity
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+
+/**
+ * Gearslip as the home screen of the device it runs on: a head unit that runs Android itself, or
+ * a spare phone or tablet on the dash. The car UI fills the device's own screen, with no car in
+ * between. Off until it's turned on in Settings, so a phone never lists Gearslip as a home app.
+ */
+object LauncherMode {
+
+    private val _active = MutableStateFlow(false)
+
+    /** The car UI is up on this device's own screen, as its home screen. */
+    val active: StateFlow<Boolean> = _active
+
+    internal fun setActive(on: Boolean) {
+        _active.value = on
+    }
+
+    private fun component(context: Context) = ComponentName(context, LauncherActivity::class.java)
+
+    /** Whether Android may offer Gearslip as the home app. */
+    fun enabled(context: Context): Boolean =
+        context.packageManager.getComponentEnabledSetting(component(context)) ==
+            PackageManager.COMPONENT_ENABLED_STATE_ENABLED
+
+    fun setEnabled(context: Context, on: Boolean) {
+        context.packageManager.setComponentEnabledSetting(
+            component(context),
+            if (on) PackageManager.COMPONENT_ENABLED_STATE_ENABLED else PackageManager.COMPONENT_ENABLED_STATE_DISABLED,
+            PackageManager.DONT_KILL_APP,
+        )
+        GearslipLog.i("launcher mode ${if (on) "on" else "off"}")
+    }
+
+    /** Android's own "Default home app" choice, where Gearslip is picked once it's offered. */
+    fun openHomeChoice(context: Context) {
+        runCatching {
+            context.startActivity(Intent(Settings.ACTION_HOME_SETTINGS).addFlags(Intent.FLAG_ACTIVITY_NEW_TASK))
+        }.onFailure { GearslipLog.w("launcher mode: no home app settings on this device (${it.message})") }
+    }
+
+    /** Head units and most tablets have no phone of their own to call with. */
+    fun canCall(context: Context): Boolean {
+        val feature = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+            PackageManager.FEATURE_TELEPHONY_CALLING
+        } else {
+            @Suppress("DEPRECATION")
+            PackageManager.FEATURE_TELEPHONY
+        }
+        return context.packageManager.hasSystemFeature(feature)
+    }
+
+    /**
+     * Opens an ordinary app full screen, Gearslip's own phone screens included. The car UI lives
+     * on a display of its own, and a context from it would start the app there, which Android
+     * refuses; the application context and the device's own display put it on the real screen.
+     */
+    fun launch(context: Context, packageName: String) {
+        val app = context.applicationContext
+        val intent = app.packageManager.getLaunchIntentForPackage(packageName) ?: return
+        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+        val options = ActivityOptions.makeBasic().setLaunchDisplayId(Display.DEFAULT_DISPLAY)
+        runCatching { app.startActivity(intent, options.toBundle()) }
+            .onFailure { GearslipLog.w("launcher mode: couldn't open $packageName (${it.message})") }
+    }
+}

gearslip/src/main/java/app/seb3thehacker/gearslip/car/MediaBrowse.kt

@@ -1,5 +1,7 @@
 package app.seb3thehacker.gearslip.car
 
+import androidx.compose.ui.res.stringResource
+import app.seb3thehacker.gearslip.R
 import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.foundation.shape.RoundedCornerShape
 import app.seb3thehacker.gearslip.car.theme.*
@@ -11,6 +13,7 @@ import androidx.compose.foundation.layout.Arrangement
 import android.provider.Settings
 import android.content.Intent
 import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.aspectRatio
 import androidx.compose.foundation.layout.BoxWithConstraints
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
@@ -83,34 +86,138 @@ internal fun BrowsePanel(browse: app.seb3thehacker.gearslip.media.BrowseState, m
         // row could say that the app's name in the top-left corner hasn't already - showing it
         // again here (as "Browse", or as the app's own name) was just the same label twice.
         if (media.canGoUp || browse.trail.isNotEmpty()) {
-            Row(verticalAlignment = Alignment.CenterVertically) {
+            Row(Modifier.padding(bottom = 12.dp), verticalAlignment = Alignment.CenterVertically) {
                 if (media.canGoUp) {
-                    GsIconButton(Icons.Filled.ArrowBack, "Up", media::up)
+                    GsIconButton(Icons.Filled.ArrowBack, stringResource(R.string.media_up), media::up, size = 44.dp, shape = CircleShape)
+                    Spacer(Modifier.width(14.dp))
                 }
                 browse.trail.lastOrNull()?.let {
                     Text(
                         it,
-                        style = MaterialTheme.typography.titleMedium, fontWeight = FontWeight.SemiBold,
+                        style = MaterialTheme.typography.titleLarge, fontWeight = FontWeight.Bold,
                         maxLines = 1, overflow = TextOverflow.Ellipsis,
                     )
                 }
             }
         }
         when {
-            browse.loading -> Notice("Loading…", null)
+            browse.loading -> Notice(stringResource(R.string.media_loading), null)
             browse.unavailable -> Notice(
-                "$appLabel keeps its library to itself.",
-                "Start music in the app on your phone. Play, pause, skip and seek work from here.",
+                stringResource(R.string.media_keeps_library, appLabel),
+                stringResource(R.string.media_browse_start),
             )
-            browse.failed -> Notice("Could not load this list.", null)
-            browse.entries.isEmpty() -> Notice("Nothing here.", null)
-            else -> LazyColumn(Modifier.fillMaxSize(), verticalArrangement = Arrangement.spacedBy(8.dp)) {
-                items(browse.entries, key = { it.id }) { entry -> EntryRow(entry, media) }
+            browse.failed -> Notice(stringResource(R.string.media_load_failed), null)
+            browse.entries.isEmpty() -> Notice(stringResource(R.string.media_nothing_here), null)
+            else -> BrowseList(browse.entries, media)
+        }
+    }
+}
+
+/**
+ * A list laid out the way the app asked: under its section headings, covers where it asked for a
+ * grid and rows everywhere else. A grid section among others is a shelf that scrolls sideways; a
+ * list that is one grid and nothing else wraps into rows of covers instead.
+ */
+@Composable
+private fun BrowseList(entries: List<MediaEntry>, media: CarMedia) {
+    val sections = remember(entries) { browseSections(entries) }
+    BoxWithConstraints(Modifier.fillMaxSize()) {
+        val onlyGrid = sections.size == 1 && sections[0].grid && sections[0].heading == null
+        val columns = ((maxWidth + SHELF_GAP) / (SHELF_COVER + SHELF_GAP)).toInt().coerceAtLeast(2)
+        LazyColumn(
+            Modifier.fillMaxSize(),
+            contentPadding = PaddingValues(bottom = 8.dp),
+            verticalArrangement = Arrangement.spacedBy(10.dp),
+        ) {
+            sections.forEachIndexed { i, section ->
+                val heading = section.heading
+                if (heading != null && sections.getOrNull(i - 1)?.heading != heading) {
+                    item(key = "heading $i") {
+                        Text(
+                            heading,
+                            style = MaterialTheme.typography.titleLarge, fontWeight = FontWeight.Bold,
+                            maxLines = 1, overflow = TextOverflow.Ellipsis,
+                            modifier = Modifier.padding(top = if (i == 0) 0.dp else 8.dp),
+                        )
+                    }
+                }
+                when {
+                    !section.grid -> items(section.entries, key = { it.id }) { entry -> EntryRow(entry, media) }
+                    onlyGrid -> items(section.entries.chunked(columns)) { row ->
+                        Row(horizontalArrangement = Arrangement.spacedBy(SHELF_GAP)) {
+                            row.forEach { CoverTile(it, media, Modifier.weight(1f)) }
+                            repeat(columns - row.size) { Spacer(Modifier.weight(1f)) }
+                        }
+                    }
+                    else -> item(key = "shelf $i") {
+                        androidx.compose.foundation.lazy.LazyRow(horizontalArrangement = Arrangement.spacedBy(SHELF_GAP)) {
+                            items(section.entries, key = { it.id }) { CoverTile(it, media, Modifier.width(SHELF_COVER)) }
+                        }
+                    }
+                }
             }
         }
     }
 }
 
+private val SHELF_COVER = 132.dp
+private val SHELF_GAP = 14.dp
+
+/** A run of entries under one heading that are all covers or all rows. */
+private class BrowseSection(val heading: String?, val grid: Boolean, val entries: List<MediaEntry>)
+
+private fun browseSections(entries: List<MediaEntry>): List<BrowseSection> {
+    val out = mutableListOf<BrowseSection>()
+    var run = mutableListOf<MediaEntry>()
+    for (entry in entries) {
+        val last = run.lastOrNull()
+        if (last != null && (last.group != entry.group || last.grid != entry.grid)) {
+            out += BrowseSection(last.group, last.grid, run)
+            run = mutableListOf()
+        }
+        run += entry
+    }
+    run.lastOrNull()?.let { out += BrowseSection(it.group, it.grid, run) }
+    return out
+}
+
+/** One entry as a cover with its name under it: what the app's grids are made of. */
+@Composable
+private fun CoverTile(entry: MediaEntry, media: CarMedia, modifier: Modifier) {
+    val context = LocalContext.current
+    val icon by produceState(entry.iconBitmap, entry.iconUri) {
+        value = entry.iconBitmap ?: MediaArt.load(context, entry.iconUri)
+    }
+    val shape = RoundedCornerShape(16.dp)
+    Column(modifier.clip(shape).clickable { media.select(entry) }) {
+        Box(
+            Modifier
+                .fillMaxWidth()
+                .aspectRatio(1f)
+                .gsPanelShadow(shape)
+                .clip(shape)
+                .background(MaterialTheme.colorScheme.surfaceContainerHigh),
+            contentAlignment = Alignment.Center,
+        ) {
+            icon?.let { Image(it.asImageBitmap(), null, Modifier.fillMaxSize(), contentScale = ContentScale.Crop) }
+                ?: Icon(
+                    if (entry.browsable) MediaIcons.Folder else MediaIcons.MusicNote, null,
+                    tint = MaterialTheme.colorScheme.onSurfaceVariant, modifier = Modifier.fillMaxSize(0.35f),
+                )
+        }
+        Text(
+            entry.title, style = MaterialTheme.typography.titleSmall, fontWeight = FontWeight.SemiBold,
+            maxLines = 1, overflow = TextOverflow.Ellipsis, modifier = Modifier.padding(top = 8.dp, start = 2.dp),
+        )
+        if (entry.subtitle.isNotEmpty()) {
+            Text(
+                entry.subtitle, style = MaterialTheme.typography.bodySmall, color = MaterialTheme.colorScheme.onSurfaceVariant,
+                maxLines = 1, overflow = TextOverflow.Ellipsis, modifier = Modifier.padding(start = 2.dp, bottom = 4.dp),
+            )
+        }
+    }
+}
+
 // --- up next -----------------------------------------------------------------------------------
 
 /**
@@ -127,12 +234,15 @@ internal fun QueuePanel(queue: List<QueueTrack>, now: NowPlaying, media: CarMedi
     Column(modifier) {
         if (upNext.isEmpty()) {
             Notice(
-                "Nothing queued.",
-                "${if (now.title.isEmpty()) "Nothing playing" else "Only what's already playing"} - " +
-                    "not every app tells Gearslip what comes next.",
+                stringResource(R.string.media_nothing_queued),
+                stringResource(if (now.title.isEmpty()) R.string.media_queue_empty_idle else R.string.media_queue_empty_playing),
             )
         } else {
-            LazyColumn(Modifier.fillMaxSize(), verticalArrangement = Arrangement.spacedBy(8.dp)) {
+            LazyColumn(
+                Modifier.fillMaxSize(),
+                contentPadding = PaddingValues(bottom = 8.dp),
+                verticalArrangement = Arrangement.spacedBy(8.dp),
+            ) {
                 items(upNext, key = { it.queueId }) { track -> QueueRow(track, media) }
             }
         }
@@ -148,18 +258,18 @@ private fun QueueRow(track: QueueTrack, media: CarMedia) {
     Surface(
         onClick = { media.playQueueItem(track) },
         shape = MaterialTheme.shapes.large,
-        color = MaterialTheme.colorScheme.surfaceVariant,
+        color = MaterialTheme.colorScheme.surfaceContainer,
         modifier = Modifier.fillMaxWidth(),
     ) {
-        Row(Modifier.padding(10.dp), verticalAlignment = Alignment.CenterVertically) {
+        Row(Modifier.padding(8.dp), verticalAlignment = Alignment.CenterVertically) {
             RowArt(icon, MediaIcons.MusicNote)
-            Column(Modifier.weight(1f).padding(horizontal = 12.dp)) {
-                Text(track.title, style = MaterialTheme.typography.titleSmall, maxLines = 1, overflow = TextOverflow.Ellipsis)
+            Column(Modifier.weight(1f).padding(horizontal = 14.dp)) {
+                Text(track.title, style = MaterialTheme.typography.titleMedium, maxLines = 1, overflow = TextOverflow.Ellipsis)
                 if (track.subtitle.isNotEmpty()) {
-                    Text(track.subtitle, style = MaterialTheme.typography.bodySmall, color = MaterialTheme.colorScheme.onSurfaceVariant, maxLines = 1, overflow = TextOverflow.Ellipsis)
+                    Text(track.subtitle, style = MaterialTheme.typography.bodyMedium, color = MaterialTheme.colorScheme.onSurfaceVariant, maxLines = 1, overflow = TextOverflow.Ellipsis)
                 }
             }
-            Icon(Icons.Filled.PlayArrow, "Play", tint = MaterialTheme.colorScheme.onSurfaceVariant)
+            Icon(Icons.Filled.PlayArrow, stringResource(R.string.media_play), tint = MaterialTheme.colorScheme.onSurfaceVariant)
         }
     }
 }
@@ -173,19 +283,19 @@ internal fun EntryRow(entry: MediaEntry, media: CarMedia, onClick: () -> Unit =
     Surface(
         onClick = onClick,
         shape = MaterialTheme.shapes.large,
-        color = MaterialTheme.colorScheme.surfaceVariant,
+        color = MaterialTheme.colorScheme.surfaceContainer,
         modifier = Modifier.fillMaxWidth(),
     ) {
-        Row(Modifier.padding(10.dp), verticalAlignment = Alignment.CenterVertically) {
+        Row(Modifier.padding(8.dp), verticalAlignment = Alignment.CenterVertically) {
             RowArt(icon, if (entry.browsable) MediaIcons.Folder else MediaIcons.MusicNote)
-            Column(Modifier.weight(1f).padding(horizontal = 12.dp)) {
-                Text(entry.title, style = MaterialTheme.typography.titleSmall, maxLines = 1, overflow = TextOverflow.Ellipsis)
+            Column(Modifier.weight(1f).padding(horizontal = 14.dp)) {
+                Text(entry.title, style = MaterialTheme.typography.titleMedium, maxLines = 1, overflow = TextOverflow.Ellipsis)
                 if (entry.subtitle.isNotEmpty()) {
-                    Text(entry.subtitle, style = MaterialTheme.typography.bodySmall, color = MaterialTheme.colorScheme.onSurfaceVariant, maxLines = 1, overflow = TextOverflow.Ellipsis)
+                    Text(entry.subtitle, style = MaterialTheme.typography.bodyMedium, color = MaterialTheme.colorScheme.onSurfaceVariant, maxLines = 1, overflow = TextOverflow.Ellipsis)
                 }
             }
             if (entry.browsable && entry.playable) {
-                GsIconButton(Icons.Filled.PlayArrow, "Play", { media.playAll(entry) })
+                GsIconButton(Icons.Filled.PlayArrow, stringResource(R.string.media_play), { media.playAll(entry) })
             }
             if (entry.browsable) Icon(Icons.AutoMirrored.Filled.KeyboardArrowRight, null)
         }
@@ -196,7 +306,7 @@ internal fun EntryRow(entry: MediaEntry, media: CarMedia, onClick: () -> Unit =
 @Composable
 private fun RowArt(icon: android.graphics.Bitmap?, fallback: ImageVector) {
     Box(
-        Modifier.size(62.dp).clip(MaterialTheme.shapes.medium).background(MaterialTheme.colorScheme.surfaceContainerHigh),
+        Modifier.size(56.dp).clip(RoundedCornerShape(12.dp)).background(MaterialTheme.colorScheme.surfaceContainerHigh),
         contentAlignment = Alignment.Center,
     ) {
         if (icon != null) Image(icon.asImageBitmap(), null, Modifier.fillMaxSize(), contentScale = ContentScale.Crop)
@@ -217,8 +327,14 @@ internal object MediaIcons {
     val Shuffle = icon("Shuffle", "M10.59,9.17L5.41,4 4,5.41l5.17,5.17 1.42,-1.41zM14.5,4l2.04,2.04L4,18.59 5.41,20 17.96,7.46 20,9.5L20,4h-5.5zM14.83,13.41l-1.41,1.41 3.13,3.13L14.5,20L20,20v-5.5l-2.04,2.04 -3.13,-3.13z")
     val Repeat = icon("Repeat", "M7,7h10v3l4,-4 -4,-4v3L5,5v6h2L7,7zM17,17L7,17v-3l-4,4 4,4v-3h12v-6h-2v4z")
     val RepeatOne = icon("RepeatOne", "M7,7h10v3l4,-4 -4,-4v3L5,5v6h2L7,7zM17,17L7,17v-3l-4,4 4,4v-3h12v-6h-2v4zM13,15L13,9h-1l-2,1v1h1.5v4L13,15z")
-    /** A screen with a filled right-hand panel: "put the player beside the map". */
-    val DockRight = icon("DockRight", "M2,4h20v16H2zM4,6h10v12H4z", PathFillType.EvenOdd)
+    /**
+     * A screen split into the map and a side panel: outlined while the panel is closed ("put the
+     * player beside the map"), filled in while it's open ("close it"), on the side it opens on.
+     */
+    val DockRight = icon("DockRight", "M2,4h20v16H2zM4,6h10v12H4zM16,6h4v12h-4z", PathFillType.EvenOdd)
+    val DockRightOpen = icon("DockRightOpen", "M2,4h20v16H2zM4,6h10v12H4z", PathFillType.EvenOdd)
+    val DockLeft = icon("DockLeft", "M2,4h20v16H2zM4,6h4v12H4zM10,6h10v12H10z", PathFillType.EvenOdd)
+    val DockLeftOpen = icon("DockLeftOpen", "M2,4h20v16H2zM10,6h10v12H10z", PathFillType.EvenOdd)
     val Fullscreen = icon("Fullscreen", "M7,14L5,14v5h5v-2L7,17v-3zM5,10h2L7,7h3L10,5L5,5v5zM17,17h-3v2h5v-5h-2v3zM14,5v2h3v3h2L19,5h-5z")
     val FullscreenExit = icon("FullscreenExit", "M5,16h3v3h2v-5L5,14v2zM8,8L5,8v2h5L10,5L8,5v3zM14,19h2v-3h3v-2h-5v5zM16,8L16,5h-2v5h5L19,8h-3z")
 

gearslip/src/main/java/app/seb3thehacker/gearslip/car/MediaScreen.kt

@@ -1,9 +1,14 @@
 package app.seb3thehacker.gearslip.car
 
+import androidx.compose.ui.res.stringResource
+import app.seb3thehacker.gearslip.R
 import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.foundation.shape.RoundedCornerShape
 import app.seb3thehacker.gearslip.car.theme.*
 import androidx.compose.foundation.Image
+import androidx.compose.ui.unit.sp
+import androidx.compose.foundation.text.TextAutoSize
+import androidx.compose.foundation.horizontalScroll
 import androidx.compose.foundation.background
 import androidx.compose.foundation.rememberScrollState
 import androidx.compose.foundation.verticalScroll
@@ -19,6 +24,7 @@ import androidx.compose.foundation.layout.fillMaxHeight
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.heightIn
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.layout.width
@@ -49,6 +55,9 @@ import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
+import androidx.compose.ui.draw.drawWithContent
+import androidx.compose.ui.graphics.graphicsLayer
+import androidx.compose.ui.text.withStyle
 import androidx.compose.ui.graphics.PathFillType
 import androidx.compose.ui.graphics.SolidColor
 import androidx.compose.foundation.layout.widthIn
@@ -97,18 +106,18 @@ fun MediaScreen(app: MediaApp, onExit: () -> Unit) {
 
     val art = rememberArt(now)
 
-    // The art's colour behind everything, header included; the buttons keep their own.
-    Surface(Modifier.fillMaxSize(), color = rememberArtColor(art, MaterialTheme.colorScheme.background, darkLightness = 0.15f, lightLightness = 0.9f)) {
+    // The theme's background, with the cover's colours glowing faintly behind the cover on the left.
+    Surface(Modifier.fillMaxSize(), color = MaterialTheme.colorScheme.background) {
+        if (phase == CarMedia.Phase.READY && !searching) AlbumGlow(art, Modifier.fillMaxSize(), wide = true)
         if (phase != CarMedia.Phase.READY) {
-            Column(Modifier.fillMaxSize()) {
+            Column(Modifier.fillMaxSize().padding(bottom = LocalNavBarInset.current)) {
                 AppIdentity(app, onExit, Modifier.padding(horizontal = 16.dp, vertical = 10.dp))
                 when (phase) {
                     CarMedia.Phase.REJECTED -> when (rejection) {
                         CarMedia.Rejection.NEEDS_NOTIFICATION_ACCESS -> Notice(
-                            "${app.label} keeps its library to itself.",
-                            "Gearslip can still control it once it has Notification access on the phone. " +
-                                "Allow it under Settings > Notifications > Notification access.",
-                            action = "Open on phone" to {
+                            stringResource(R.string.media_keeps_library, app.label),
+                            stringResource(R.string.media_needs_access),
+                            action = stringResource(R.string.media_open_on_phone) to {
                                 val app = context.applicationContext
                                 runCatching {
                                     app.startActivity(
@@ -118,24 +127,23 @@ fun MediaScreen(app: MediaApp, onExit: () -> Unit) {
                             },
                         )
                         CarMedia.Rejection.NEEDS_APP_RUNNING -> Notice(
-                            "${app.label} isn't running.",
-                            "${app.label} plays through Gearslip's own player, but only while it's " +
-                                "open on the phone. Open it once and it keeps playing here in the car.",
-                            action = "Open ${app.label}" to { media.launchAndConnect(app) },
+                            stringResource(R.string.media_not_running, app.label),
+                            stringResource(R.string.media_not_running_body, app.label),
+                            action = stringResource(R.string.media_open_app, app.label) to { media.launchAndConnect(app) },
                         )
                         CarMedia.Rejection.REFUSED -> Notice(
-                            "${app.label} would not let Gearslip browse it.",
-                            "Some media apps only accept Google's own host.",
+                            stringResource(R.string.media_refused, app.label),
+                            stringResource(R.string.media_refused_body),
                         )
                     }
-                    else -> Notice("Connecting to ${app.label}…", null)
+                    else -> Notice(stringResource(R.string.media_connecting, app.label), null)
                 }
             }
             return@Surface
         }
 
         if (searching) {
-            SearchPanel(
+            Box(Modifier.padding(bottom = LocalNavBarInset.current)) { SearchPanel(
                 appLabel = app.label,
                 media = media,
                 canPickForYou = now.canSearch,
@@ -153,52 +161,91 @@ fun MediaScreen(app: MediaApp, onExit: () -> Unit) {
                     tab = Tab.NOW_PLAYING
                 },
                 onClose = { searching = false },
-            )
+            ) }
             return@Surface
         }
 
-        // Two columns, split the same way on every tab so nothing jumps when switching: the app
-        // and the art (or, beside a list, the compact player) on the left; the tabs across the
-        // top of the right column, over whatever the tab shows.
-        Row(
-            Modifier.fillMaxSize().padding(start = 16.dp, end = 16.dp, top = 10.dp, bottom = 8.dp),
-            horizontalArrangement = Arrangement.spacedBy(24.dp),
-        ) {
-            Column(Modifier.weight(0.8f).fillMaxHeight()) {
-                AppIdentity(app, onExit)
-                Spacer(Modifier.height(12.dp))
-                if (tab == Tab.NOW_PLAYING) {
-                    CoverArt(art, Modifier.weight(1f).fillMaxWidth())
-                } else {
-                    CompactPlayer(now, media, Modifier.weight(1f).fillMaxWidth())
+        // The page runs down under the see-through nav bar, so the cover's glow carries on behind
+        // it; the content stops at the bar's top edge. Lists run right to it; the rest keeps a gap.
+        val barTop = LocalNavBarInset.current
+        val barInset = barTop + 8.dp
+        val tabs: @Composable (Modifier) -> Unit = { tabModifier ->
+            MediaTab(stringResource(R.string.media_now_playing), tab == Tab.NOW_PLAYING, tabModifier) { tab = Tab.NOW_PLAYING }
+            MediaTab(stringResource(R.string.media_up_next), tab == Tab.QUEUE, tabModifier) { tab = Tab.QUEUE }
+            MediaTab(stringResource(R.string.media_browse), tab == Tab.BROWSE, tabModifier) { tab = Tab.BROWSE }
+            MediaTab(stringResource(R.string.storage_lyrics), tab == Tab.LYRICS, tabModifier) { tab = Tab.LYRICS }
+        }
+        val searchButton: @Composable () -> Unit = {
+            if (now.canSearch || media.canSearchLibrary) {
+                GsIconButton(
+                    Icons.Filled.Search,
+                    stringResource(R.string.media_search, app.label),
+                    { searching = true },
+                    colors = GsColors(MaterialTheme.colorScheme.surfaceContainerHigh, MaterialTheme.colorScheme.onSurface),
+                    size = 44.dp,
+                    shape = MaterialTheme.shapes.large,
+                )
+            }
+        }
+        val tabContent: @Composable (Modifier) -> Unit = { contentModifier ->
+            Box(contentModifier) {
+                when (tab) {
+                    Tab.NOW_PLAYING -> StageControls(now, media, Modifier.fillMaxSize().padding(bottom = barInset))
+                    Tab.BROWSE -> BrowsePanel(browse, media, app.label, Modifier.fillMaxSize().padding(bottom = barTop))
+                    Tab.QUEUE -> QueuePanel(queue, now, media, Modifier.fillMaxSize().padding(bottom = barTop))
+                    Tab.LYRICS -> LyricsPanel(now, Modifier.fillMaxSize().padding(bottom = barInset))
                 }
             }
-            Column(Modifier.weight(1.2f).fillMaxHeight()) {
-                Row(Modifier.fillMaxWidth(), horizontalArrangement = Arrangement.spacedBy(8.dp)) {
-                    MediaTab("Now playing", tab == Tab.NOW_PLAYING, Modifier.weight(1f)) { tab = Tab.NOW_PLAYING }
-                    MediaTab("Browse", tab == Tab.BROWSE, Modifier.weight(1f)) { tab = Tab.BROWSE }
-                    MediaTab("Up next", tab == Tab.QUEUE, Modifier.weight(1f)) { tab = Tab.QUEUE }
-                    MediaTab("Lyrics", tab == Tab.LYRICS, Modifier.weight(1f)) { tab = Tab.LYRICS }
-                    if (now.canSearch || media.canSearchLibrary) {
-                        GsIconButton(
-                            Icons.Filled.Search,
-                            "Search ${app.label}",
-                            { searching = true },
-                            colors = GsColors(MaterialTheme.colorScheme.surfaceContainerHigh, MaterialTheme.colorScheme.onSurface),
-                            size = 44.dp,
-                            shape = MaterialTheme.shapes.large,
-                        )
+        }
+
+        BoxWithConstraints(Modifier.fillMaxSize().padding(start = 16.dp, end = 16.dp, top = 10.dp)) {
+            // A small screen, or a big one at Extra large size, has no room for two columns: the
+            // app and the tabs share one bar, and a list takes the whole width. The nav bar keeps
+            // the controls, so nothing is lost.
+            if (maxWidth < NARROW_WIDTH || maxHeight - barInset < NARROW_HEIGHT) {
+                Column(Modifier.fillMaxSize(), verticalArrangement = Arrangement.spacedBy(8.dp)) {
+                    Row(
+                        Modifier.fillMaxWidth(),
+                        horizontalArrangement = Arrangement.spacedBy(12.dp),
+                        verticalAlignment = Alignment.CenterVertically,
+                    ) {
+                        AppIdentity(app, onExit, Modifier.widthIn(max = 180.dp))
+                        Row(
+                            Modifier.weight(1f).horizontalScroll(rememberScrollState()),
+                            horizontalArrangement = Arrangement.spacedBy(8.dp, Alignment.End),
+                        ) { tabs(Modifier) }
+                        searchButton()
+                    }
+                    search?.let { SearchStatus(it, app.label, media::dismissSearch) }
+                    if (tab == Tab.NOW_PLAYING) NowPlayingPage(now, media, Modifier.weight(1f).fillMaxWidth().padding(bottom = barInset), padded = false)
+                    else tabContent(Modifier.weight(1f).fillMaxWidth())
+                }
+                return@BoxWithConstraints
+            }
+
+            // Two columns, split the same way on every tab so nothing jumps when switching: the app
+            // and the art (or, beside a list, the compact player) on the left; the tabs across the
+            // top of the right column, over whatever the tab shows.
+            Row(Modifier.fillMaxSize(), horizontalArrangement = Arrangement.spacedBy(24.dp)) {
+                Column(Modifier.weight(0.8f).fillMaxHeight().padding(bottom = barInset)) {
+                    AppIdentity(app, onExit)
+                    Spacer(Modifier.height(12.dp))
+                    if (tab == Tab.NOW_PLAYING) {
+                        CoverArt(art, Modifier.weight(1f).fillMaxWidth())
+                    } else {
+                        CompactPlayer(now, media, art, Modifier.weight(1f).fillMaxWidth())
                     }
                 }
-                search?.let { SearchStatus(it, app.label, media::dismissSearch) }
-                Spacer(Modifier.height(12.dp))
-                Box(Modifier.weight(1f).fillMaxWidth()) {
-                    when (tab) {
-                        Tab.NOW_PLAYING -> NowPlayingControls(now, media, Modifier.fillMaxSize())
-                        Tab.BROWSE -> BrowsePanel(browse, media, app.label, Modifier.fillMaxSize())
-                        Tab.QUEUE -> QueuePanel(queue, now, media, Modifier.fillMaxSize())
-                        Tab.LYRICS -> LyricsPanel(now, Modifier.fillMaxSize())
+                Column(Modifier.weight(1.2f).fillMaxHeight()) {
+                    // The tabs share the row evenly; a long word (a translation, a big text size)
+                    // shrinks to fit its tab instead.
+                    Row(Modifier.fillMaxWidth(), horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+                        tabs(Modifier.weight(1f))
+                        searchButton()
                     }
+                    search?.let { SearchStatus(it, app.label, media::dismissSearch) }
+                    Spacer(Modifier.height(12.dp))
+                    tabContent(Modifier.weight(1f).fillMaxWidth())
                 }
             }
         }
@@ -213,7 +260,7 @@ fun MediaScreen(app: MediaApp, onExit: () -> Unit) {
 private fun AppIdentity(app: MediaApp, onExit: () -> Unit, modifier: Modifier = Modifier) {
     val icon = remember(app) { findEntry(app.component.flattenToString())?.icon }
     Row(modifier, verticalAlignment = Alignment.CenterVertically) {
-        GsIconButton(Icons.Filled.ArrowBack, "Back", onExit, size = 44.dp)
+        GsIconButton(Icons.Filled.ArrowBack, stringResource(R.string.back), onExit, size = 44.dp)
         Spacer(Modifier.width(14.dp))
         icon?.let {
             Image(it, null, Modifier.size(26.dp).clip(RoundedCornerShape(7.dp)))
@@ -273,10 +320,10 @@ private fun SearchPanel(
             verticalAlignment = Alignment.CenterVertically,
             horizontalArrangement = Arrangement.spacedBy(8.dp),
         ) {
-            GsIconButton(Icons.Filled.ArrowBack, "Back", onClose, size = ICON_BUTTON_SIZE)
+            GsIconButton(Icons.Filled.ArrowBack, stringResource(R.string.back), onClose, size = ICON_BUTTON_SIZE)
             SearchField(
                 query,
-                "Search $appLabel",
+                stringResource(R.string.media_search, appLabel),
                 Modifier.weight(1f).clickable { typing = true },
                 onClear = {
                     query = ""
@@ -287,12 +334,12 @@ private fun SearchPanel(
         Box(Modifier.weight(1f).fillMaxWidth().padding(horizontal = 16.dp)) {
             val entries = current?.entries
             when {
-                trimmed.isEmpty() -> SearchNote("Type a song, artist, album, or playlist.")
+                trimmed.isEmpty() -> SearchNote(stringResource(R.string.media_search_hint))
                 unsupported && canPickForYou ->
-                    SearchNote("$appLabel can't list results. Press search, and $appLabel picks what to play.")
-                unsupported -> SearchNote("$appLabel can't search from the car.")
-                entries == null -> SearchNote("Searching $appLabel…")
-                entries.isEmpty() -> SearchNote("$appLabel found nothing for \"$trimmed\".")
+                    SearchNote(stringResource(R.string.media_search_no_list, appLabel))
+                unsupported -> SearchNote(stringResource(R.string.media_search_unsupported, appLabel))
+                entries == null -> SearchNote(stringResource(R.string.media_searching, appLabel))
+                entries.isEmpty() -> SearchNote(stringResource(R.string.media_search_nothing, appLabel, trimmed))
                 else -> LazyColumn(verticalArrangement = Arrangement.spacedBy(8.dp), contentPadding = PaddingValues(bottom = 8.dp)) {
                     items(entries) { entry ->
                         EntryRow(entry, media) {
@@ -350,8 +397,8 @@ private fun SearchStatus(search: CarMedia.Search, appLabel: String, onDismiss: (
         modifier = Modifier.fillMaxWidth().padding(top = 8.dp),
     ) {
         Text(
-            if (search.ignored) "$appLabel didn't play anything for \"${search.query}\"."
-            else "Searching $appLabel for \"${search.query}\"…",
+            if (search.ignored) stringResource(R.string.media_search_ignored, appLabel, search.query)
+            else stringResource(R.string.media_searching_for, appLabel, search.query),
             style = MaterialTheme.typography.bodyLarge,
             maxLines = 2,
             overflow = TextOverflow.Ellipsis,
@@ -376,14 +423,17 @@ private fun MediaTab(label: String, selected: Boolean, modifier: Modifier, onCli
             style = MaterialTheme.typography.titleSmall,
             fontWeight = if (selected) FontWeight.Bold else FontWeight.Normal,
             maxLines = 1,
-            overflow = TextOverflow.Ellipsis,
+            autoSize = TextAutoSize.StepBased(minFontSize = 11.sp, maxFontSize = MaterialTheme.typography.titleSmall.fontSize),
+            modifier = Modifier.padding(horizontal = 8.dp),
         )
     }
 }
 
 /**
- * The song's lyrics, fetched when this tab opens. Synced lyrics follow the playback position with
- * the current line in the accent colour; unsynced ones are plain scrolling text.
+ * The song's lyrics, fetched when this tab opens. Synced lyrics follow playback: the line being
+ * sung sits a little above the middle in bold, lines already sung dim, and the list fades out at
+ * both edges instead of cutting a line in half. Word-timed lyrics also light up each word as it's
+ * sung. Unsynced ones are plain scrolling text.
  */
 @Composable
 internal fun LyricsPanel(
@@ -394,43 +444,89 @@ internal fun LyricsPanel(
     val context = LocalContext.current
     val lyrics by produceState<LyricsState>(LyricsState.Loading, now.title, now.artist, now.album, now.durationMs) {
         value = LyricsState.Loading
-        value = Lyrics.find(context, now.title, now.artist, now.album, now.durationMs)
-            ?.let { LyricsState.Found(it) } ?: LyricsState.Missing
-    }
-    val list = rememberLazyListState()
-
-    // Ticks with playback so the highlighted line moves; only synced lyrics need it.
-    var position by remember { mutableLongStateOf(0L) }
-    LaunchedEffect(now) {
-        while (true) {
-            position = now.currentPosition()
-            kotlinx.coroutines.delay(300)
+        val found = Lyrics.find(context, now.title, now.artist, now.album, now.durationMs)
+        value = found?.let { LyricsState.Found(it) } ?: LyricsState.Missing
+        // Cached lyrics show at once; if a source now has better ones, they replace them.
+        if (found != null) {
+            Lyrics.upgrade(context, now.title, now.artist, now.album, now.durationMs, found)
+                ?.let { value = LyricsState.Found(it) }
         }
     }
 
     when (val state = lyrics) {
-        LyricsState.Loading -> Notice("Looking for lyrics…", null)
+        LyricsState.Loading -> Notice(stringResource(R.string.media_looking_lyrics), null)
         LyricsState.Missing -> Notice(
-            if (now.title.isEmpty()) "Nothing playing." else "No lyrics found for this track.",
+            stringResource(if (now.title.isEmpty()) R.string.media_nothing_playing_dot else R.string.media_no_lyrics),
             null,
         )
-        is LyricsState.Found -> {
-            val lines = state.result.lines
-            val current = if (state.result.synced) lines.indexOfLast { it.timeMs <= position } else -1
-            LaunchedEffect(current) {
-                if (current >= 0) list.animateScrollToItem((current - 1).coerceAtLeast(0))
+        is LyricsState.Found -> Column(modifier) {
+            if (state.result.synced) SyncedLyrics(now, state.result, lineStyle, Modifier.weight(1f).fillMaxWidth())
+            else PlainLyrics(state.result, lineStyle, Modifier.weight(1f).fillMaxWidth())
+            // Debug builds name the service the lyrics came from, to see which one answers.
+            if (app.seb3thehacker.gearslip.BuildConfig.DEBUG) {
+                val from = state.result.source.ifEmpty { "an older cache" }
+                val kind = when {
+                    state.result.lines.any { it.words.isNotEmpty() } -> "word-timed"
+                    state.result.synced -> "synced"
+                    else -> "plain"
+                }
+                Text(
+                    "From $from · $kind",
+                    Modifier.padding(top = 4.dp),
+                    style = MaterialTheme.typography.labelMedium,
+                    color = MaterialTheme.colorScheme.tertiary,
+                )
             }
-            LazyColumn(modifier, state = list, verticalArrangement = Arrangement.spacedBy(6.dp)) {
-                itemsIndexed(lines) { index, line ->
+        }
+    }
+}
+
+@Composable
+private fun SyncedLyrics(
+    now: NowPlaying,
+    result: LyricsResult,
+    lineStyle: androidx.compose.ui.text.TextStyle,
+    modifier: Modifier,
+) {
+    val lines = result.lines
+    val wordTimed = lines.any { it.words.isNotEmpty() }
+    // Every frame while words are filling in, so a word doesn't light up in steps; otherwise a
+    // few times a second is enough to move the line along.
+    var position by remember { mutableLongStateOf(now.currentPosition()) }
+    LaunchedEffect(now, wordTimed) {
+        while (true) {
+            position = now.currentPosition()
+            if (wordTimed && now.state == PlaybackState.STATE_PLAYING) androidx.compose.runtime.withFrameMillis { }
+            else delay(300)
+        }
+    }
+    // Only the line changing recomposes the list; the moving position is read by the one line.
+    val current by remember(lines) {
+        androidx.compose.runtime.derivedStateOf { lines.indexOfLast { it.timeMs <= position } }
+    }
+    val list = rememberLazyListState()
+    LaunchedEffect(current) {
+        if (current >= 0) list.animateScrollToItem(current)
+    }
+
+    val scheme = MaterialTheme.colorScheme
+    val sung = scheme.onSurfaceVariant.copy(alpha = 0.55f)
+    BoxWithConstraints(modifier.fadingEdges()) {
+        LazyColumn(
+            Modifier.fillMaxSize(),
+            state = list,
+            // The padding lets the first line start, and the last line end, near the middle.
+            contentPadding = PaddingValues(top = maxHeight * 0.32f, bottom = maxHeight * 0.6f),
+            verticalArrangement = Arrangement.spacedBy(10.dp),
+        ) {
+            itemsIndexed(lines) { index, line ->
+                if (index == current) {
+                    CurrentLine(line, { position }, lineStyle)
+                } else {
                     Text(
                         line.text.ifEmpty { " " },
                         style = lineStyle,
-                        fontWeight = if (index == current) FontWeight.Bold else FontWeight.Normal,
-                        color = when {
-                            !state.result.synced -> MaterialTheme.colorScheme.onSurface
-                            index == current -> MaterialTheme.colorScheme.primary
-                            else -> MaterialTheme.colorScheme.onSurfaceVariant
-                        },
+                        color = if (index < current) sung else scheme.onSurfaceVariant,
                     )
                 }
             }
@@ -438,6 +534,72 @@ internal fun LyricsPanel(
     }
 }
 
+/**
+ * The line being sung, in bold and a size up. With word timings, words already sung are in the
+ * accent colour, the one being sung fills in letter by letter, and the rest wait dimmed.
+ */
+@Composable
+private fun CurrentLine(line: app.seb3thehacker.gearslip.media.LyricLine, position: () -> Long, lineStyle: androidx.compose.ui.text.TextStyle) {
+    val scheme = MaterialTheme.colorScheme
+    val style = lineStyle.copy(fontWeight = FontWeight.Bold, fontSize = lineStyle.fontSize * 1.15f)
+    if (line.words.isEmpty()) {
+        Text(line.text.ifEmpty { " " }, style = style, color = scheme.primary)
+        return
+    }
+    val lit = scheme.primary
+    val waiting = scheme.onSurfaceVariant.copy(alpha = 0.7f)
+    val now = position()
+    val text = androidx.compose.ui.text.buildAnnotatedString {
+        line.words.forEachIndexed { i, word ->
+            // The line's first word has no leading space to trim, the last no trailing one.
+            val shown = if (i == line.words.lastIndex) word.text.trimEnd() else word.text
+            val progress = when {
+                now >= word.endMs -> 1f
+                now <= word.startMs -> 0f
+                else -> (now - word.startMs).toFloat() / (word.endMs - word.startMs).coerceAtLeast(1)
+            }
+            val letters = shown.trimEnd().length
+            val filled = progress * letters
+            shown.forEachIndexed { c, ch ->
+                val amount = (filled - c).coerceIn(0f, 1f)
+                withStyle(androidx.compose.ui.text.SpanStyle(color = androidx.compose.ui.graphics.lerp(waiting, lit, amount))) {
+                    append(ch)
+                }
+            }
+        }
+    }
+    Text(text, style = style)
+}
+
+@Composable
+private fun PlainLyrics(result: LyricsResult, lineStyle: androidx.compose.ui.text.TextStyle, modifier: Modifier) {
+    LazyColumn(
+        modifier.fadingEdges(),
+        contentPadding = PaddingValues(vertical = 24.dp),
+        verticalArrangement = Arrangement.spacedBy(8.dp),
+    ) {
+        items(result.lines) { line ->
+            Text(line.text.ifEmpty { " " }, style = lineStyle, color = MaterialTheme.colorScheme.onSurface)
+        }
+    }
+}
+
+/** Fades the top and bottom edges out, so a line scrolling past doesn't end in a hard cut. */
+private fun Modifier.fadingEdges(): Modifier = this
+    .graphicsLayer { compositingStrategy = androidx.compose.ui.graphics.CompositingStrategy.Offscreen }
+    .drawWithContent {
+        drawContent()
+        drawRect(
+            androidx.compose.ui.graphics.Brush.verticalGradient(
+                0f to androidx.compose.ui.graphics.Color.Transparent,
+                0.14f to androidx.compose.ui.graphics.Color.Black,
+                0.86f to androidx.compose.ui.graphics.Color.Black,
+                1f to androidx.compose.ui.graphics.Color.Transparent,
+            ),
+            blendMode = androidx.compose.ui.graphics.BlendMode.DstIn,
+        )
+    }
+
 private sealed interface LyricsState {
     data object Loading : LyricsState
     data object Missing : LyricsState
@@ -468,29 +630,39 @@ internal fun Notice(title: String, detail: String?, action: Pair<String, () -> U
 // --- now playing -----------------------------------------------------------------------------
 
 /**
- * The now-playing view on its own, for places with no tabs around it (an app's own
- * now-playing template): the cover on the left, [NowPlayingControls] on the right.
+ * The now-playing view on its own: an app's own now-playing template, or the Now playing tab on a
+ * small screen. The cover on the left and [NowPlayingControls] on the right where there's room;
+ * narrower, the cover sits above the controls, and only when they still fit under it.
  */
 @Composable
-internal fun NowPlayingPage(now: NowPlaying, media: CarMedia, modifier: Modifier) {
-    Row(
-        modifier.padding(horizontal = 24.dp, vertical = 8.dp),
-        horizontalArrangement = Arrangement.spacedBy(24.dp),
-    ) {
-        CoverArt(rememberArt(now), Modifier.weight(0.8f).fillMaxHeight())
-        NowPlayingControls(now, media, Modifier.weight(1.2f).fillMaxHeight())
+internal fun NowPlayingPage(now: NowPlaying, media: CarMedia, modifier: Modifier, padded: Boolean = true) {
+    BoxWithConstraints(if (padded) modifier.padding(horizontal = 24.dp, vertical = 8.dp) else modifier) {
+        val art = rememberArt(now)
+        if (maxWidth >= 520.dp && maxHeight >= 260.dp) {
+            val artWidth = minOf(maxHeight, (maxWidth - 24.dp) * 0.4f)
+            Row(Modifier.fillMaxSize(), horizontalArrangement = Arrangement.spacedBy(24.dp)) {
+                CoverArt(art, Modifier.width(artWidth).fillMaxHeight())
+                NowPlayingControls(now, media, Modifier.weight(1f).fillMaxHeight())
+            }
+        } else {
+            val artHeight = if (maxHeight >= 400.dp) minOf(maxHeight * 0.25f, 160.dp) else 0.dp
+            Column(Modifier.fillMaxSize(), verticalArrangement = Arrangement.spacedBy(8.dp)) {
+                if (artHeight > 0.dp) CoverArt(art, Modifier.fillMaxWidth().height(artHeight))
+                NowPlayingControls(now, media, Modifier.weight(1f).fillMaxWidth())
+            }
+        }
     }
 }
 
 /** The cover, as big a square as its space allows, centred in it. */
 @Composable
-private fun CoverArt(art: android.graphics.Bitmap?, modifier: Modifier) {
-    BoxWithConstraints(modifier, contentAlignment = Alignment.Center) {
+private fun CoverArt(art: android.graphics.Bitmap?, modifier: Modifier, alignment: Alignment = Alignment.Center) {
+    BoxWithConstraints(modifier, contentAlignment = alignment) {
+        val shape = RoundedCornerShape(22.dp)
         Surface(
-            shape = MaterialTheme.shapes.large,
-            color = MaterialTheme.colorScheme.surfaceVariant,
-            shadowElevation = 6.dp,
-            modifier = Modifier.size(minOf(maxWidth, maxHeight)),
+            shape = shape,
+            color = MaterialTheme.colorScheme.surfaceContainerHigh,
+            modifier = Modifier.size(minOf(maxWidth, maxHeight)).gsPanelShadow(shape),
         ) {
             if (art != null) {
                 Image(art.asImageBitmap(), null, Modifier.fillMaxSize(), contentScale = ContentScale.Crop)
@@ -504,65 +676,138 @@ private fun CoverArt(art: android.graphics.Bitmap?, modifier: Modifier) {
     }
 }
 
+/**
+ * Now playing beside the big cover: the title, artist and seek bar along the top, and the
+ * controls in two rows under them, as big as the height left over allows - the transport, then
+ * like, shuffle, repeat and the app's own buttons.
+ */
+@Composable
+private fun StageControls(now: NowPlaying, media: CarMedia, modifier: Modifier) {
+    BoxWithConstraints(modifier) {
+        // Short of height (a small screen, or Extra large size), the title steps down a size.
+        val compact = maxHeight < 360.dp
+        val showTimes = maxHeight >= 260.dp
+        val titleRoom = maxHeight * 0.4f
+        Column(Modifier.fillMaxSize().padding(start = 4.dp, end = 4.dp, top = if (compact) 6.dp else 16.dp, bottom = 4.dp)) {
+            // The title gives up its height first and scrolls, so the controls keep theirs.
+            Column(Modifier.heightIn(max = titleRoom).verticalScroll(rememberScrollState())) {
+                Text(
+                    now.title.ifEmpty { stringResource(R.string.media_nothing_playing) },
+                    style = MaterialTheme.typography.displaySmall, fontWeight = FontWeight.Bold,
+                    maxLines = 2, overflow = TextOverflow.Ellipsis,
+                    autoSize = TextAutoSize.StepBased(
+                        minFontSize = if (compact) 20.sp else 22.sp,
+                        maxFontSize = MaterialTheme.typography.displaySmall.fontSize,
+                        stepSize = 2.sp,
+                    ),
+                )
+                Text(
+                    listOf(now.artist, now.album).filter { it.isNotEmpty() }.joinToString(" · "),
+                    style = MaterialTheme.typography.titleLarge, color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    maxLines = 1, overflow = TextOverflow.Ellipsis,
+                    modifier = Modifier.padding(top = 4.dp),
+                )
+                now.error?.let { Text(it, style = MaterialTheme.typography.bodyMedium, color = MaterialTheme.colorScheme.error, maxLines = 2) }
+                if (now.title.isEmpty() && now.error == null) {
+                    Text(
+                        stringResource(R.string.media_press_play),
+                        style = MaterialTheme.typography.titleMedium, color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                }
+            }
+            PlayerProgress(now, media, Modifier.fillMaxWidth().padding(top = if (compact) 4.dp else 12.dp), showTimes = showTimes)
+            // What's left goes to the buttons: play takes about half of it, the row below a third,
+            // and neither grows past what a row of them fits across.
+            BoxWithConstraints(Modifier.weight(1f).fillMaxWidth(), contentAlignment = Alignment.Center) {
+                val gap = (maxHeight * 0.08f).coerceIn(6.dp, 20.dp)
+                val play = minOf(maxHeight * 0.5f, maxWidth / 3.2f, 128.dp).coerceAtLeast(56.dp)
+                val mode = minOf(maxHeight * 0.32f, maxWidth / 6.5f, 80.dp).coerceAtLeast(44.dp)
+                Column(verticalArrangement = Arrangement.spacedBy(gap), horizontalAlignment = Alignment.CenterHorizontally) {
+                    TransportRow(now, media, skip = play / 1.5f, playScale = 1.5f, modifier = Modifier.fillMaxWidth())
+                    PlayModeRow(now, media, size = mode, modifier = Modifier.fillMaxWidth(), maxOther = 2)
+                }
+            }
+        }
+    }
+}
+
 /**
  * Everything about the track and every control for it, read top to bottom: title and artist,
  * the seek bar, the transport, then like, shuffle and repeat as big icon-only buttons.
  */
 @Composable
 private fun NowPlayingControls(now: NowPlaying, media: CarMedia, modifier: Modifier) {
-    Column(
-        modifier.verticalScroll(rememberScrollState()),
-        verticalArrangement = Arrangement.spacedBy(14.dp, Alignment.CenterVertically),
-    ) {
-        Column {
-            Text(
-                now.title.ifEmpty { "Nothing playing" },
-                style = MaterialTheme.typography.headlineMedium, fontWeight = FontWeight.Bold,
-                maxLines = 2, overflow = TextOverflow.Ellipsis,
-            )
-            Text(
-                listOf(now.artist, now.album).filter { it.isNotEmpty() }.joinToString(" - "),
-                style = MaterialTheme.typography.titleMedium, color = MaterialTheme.colorScheme.onSurfaceVariant,
-                maxLines = 1, overflow = TextOverflow.Ellipsis,
-            )
-            now.error?.let { Text(it, style = MaterialTheme.typography.bodyMedium, color = MaterialTheme.colorScheme.error, maxLines = 2) }
-            if (now.title.isEmpty() && now.error == null) {
+    BoxWithConstraints(modifier) {
+        val compact = maxHeight < 360.dp || maxWidth < 420.dp
+        val showTimes = maxHeight >= 260.dp
+        Column(
+            Modifier.fillMaxSize(),
+            verticalArrangement = Arrangement.spacedBy(if (compact) 8.dp else 14.dp, Alignment.CenterVertically),
+        ) {
+            // The title gives up its height first and scrolls, so the controls never leave the screen.
+            Column(Modifier.weight(1f, fill = false).verticalScroll(rememberScrollState())) {
                 Text(
-                    "Press play to pick up where you left off, or find something in Browse.",
-                    style = MaterialTheme.typography.titleMedium, color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    now.title.ifEmpty { stringResource(R.string.media_nothing_playing) },
+                    style = MaterialTheme.typography.headlineMedium, fontWeight = FontWeight.Bold,
+                    maxLines = 2, overflow = TextOverflow.Ellipsis,
                 )
+                Text(
+                    listOf(now.artist, now.album).filter { it.isNotEmpty() }.joinToString(" - "),
+                    style = MaterialTheme.typography.titleMedium, color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    maxLines = 1, overflow = TextOverflow.Ellipsis,
+                )
+                now.error?.let { Text(it, style = MaterialTheme.typography.bodyMedium, color = MaterialTheme.colorScheme.error, maxLines = 2) }
+                if (now.title.isEmpty() && now.error == null) {
+                    Text(
+                        stringResource(R.string.media_press_play),
+                        style = MaterialTheme.typography.titleMedium, color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                }
             }
+            PlayerProgress(now, media, Modifier.fillMaxWidth(), showTimes = showTimes)
+            TransportRow(now, media, skip = if (compact) 48.dp else 60.dp, modifier = Modifier.fillMaxWidth())
+            PlayModeRow(now, media, size = if (compact) 46.dp else 56.dp, modifier = Modifier.fillMaxWidth(), maxOther = 2)
         }
-        PlayerProgress(now, media, Modifier.fillMaxWidth())
-        TransportRow(now, media, skip = 60.dp, modifier = Modifier.fillMaxWidth())
-        PlayModeRow(now, media, size = 56.dp, modifier = Modifier.fillMaxWidth(), maxOther = 2)
     }
 }
 
+/** Below these, the media app drops to one column: see [MediaScreen]. */
+private val NARROW_WIDTH = 600.dp
+private val NARROW_HEIGHT = 300.dp
+
 /**
- * The player beside the browse list, the queue and the lyrics: no art, which the list needs the
- * room for, just what's playing, the seek bar and the controls.
+ * The player beside the browse list, the queue and the lyrics: the cover as big as the controls
+ * leave room for, with the title and artist beside it rather than under it, so the cover gets the
+ * height; then the seek bar and the controls along the bottom.
  */
 @Composable
-private fun CompactPlayer(now: NowPlaying, media: CarMedia, modifier: Modifier) {
-    Column(
-        modifier.verticalScroll(rememberScrollState()),
-        verticalArrangement = Arrangement.spacedBy(14.dp),
-    ) {
-        Column {
-            Text(
-                now.title.ifEmpty { "Nothing playing" },
-                style = MaterialTheme.typography.titleLarge, fontWeight = FontWeight.Bold,
-                maxLines = 2, overflow = TextOverflow.Ellipsis,
-            )
-            Text(
-                now.artist,
-                style = MaterialTheme.typography.bodyLarge, color = MaterialTheme.colorScheme.onSurfaceVariant,
-                maxLines = 1, overflow = TextOverflow.Ellipsis,
-            )
+private fun CompactPlayer(now: NowPlaying, media: CarMedia, art: android.graphics.Bitmap?, modifier: Modifier) {
+    Column(modifier) {
+        BoxWithConstraints(Modifier.weight(1f).fillMaxWidth()) {
+            val cover = minOf(maxHeight, maxWidth * 0.62f).coerceAtLeast(0.dp)
+            Row(Modifier.fillMaxSize(), verticalAlignment = Alignment.Bottom) {
+                CoverArt(art, Modifier.size(cover))
+                Spacer(Modifier.width(16.dp))
+                Column(Modifier.weight(1f).padding(bottom = 4.dp)) {
+                    Text(
+                        now.title.ifEmpty { stringResource(R.string.media_nothing_playing) },
+                        style = MaterialTheme.typography.titleLarge, fontWeight = FontWeight.Bold,
+                        maxLines = 3, overflow = TextOverflow.Ellipsis,
+                    )
+                    Text(
+                        now.artist,
+                        style = MaterialTheme.typography.bodyLarge, color = MaterialTheme.colorScheme.onSurfaceVariant,
+                        maxLines = 2, overflow = TextOverflow.Ellipsis,
+                        modifier = Modifier.padding(top = 4.dp),
+                    )
+                }
+            }
         }
+        Spacer(Modifier.height(10.dp))
         PlayerProgress(now, media, Modifier.fillMaxWidth())
-        TransportRow(now, media, skip = 52.dp, modifier = Modifier.fillMaxWidth())
+        Spacer(Modifier.height(6.dp))
+        TransportRow(now, media, skip = 54.dp, modifier = Modifier.fillMaxWidth())
+        Spacer(Modifier.height(10.dp))
         PlayModeRow(now, media, size = 48.dp, modifier = Modifier.fillMaxWidth())
     }
 }

gearslip/src/main/java/app/seb3thehacker/gearslip/car/MessagePopup.kt

@@ -1,5 +1,7 @@
 package app.seb3thehacker.gearslip.car
 
+import androidx.compose.ui.res.pluralStringResource
+import androidx.compose.ui.res.stringResource
 import android.os.SystemClock
 import androidx.compose.foundation.background
 import androidx.compose.foundation.horizontalScroll
@@ -83,9 +85,10 @@ internal fun ReplyGlyph(modifier: Modifier = Modifier) =
     Icon(ImageVector.vectorResource(R.drawable.voice_selection_24), null, modifier)
 
 /** "Alex", or "Alex · 3 new" when a burst of messages from one chat has been merged. */
+@Composable
 private fun CarNotification.heading(): String {
     val who = title.ifBlank { appLabel }
-    return if (burst > 1) "$who · $burst new" else who
+    return if (burst > 1) pluralStringResource(R.plurals.msg_burst, burst, who, burst) else who
 }
 
 /** The card. It shows the voice reply too, wherever that was started from. */
@@ -106,17 +109,17 @@ fun NotificationPopup(showNew: Boolean, modifier: Modifier = Modifier) {
                 Text(n.heading(), style = MaterialTheme.typography.titleMedium, fontWeight = FontWeight.Bold, maxLines = 1, overflow = TextOverflow.Ellipsis)
                 Text(n.text, style = MaterialTheme.typography.bodyMedium, color = MaterialTheme.colorScheme.onSurfaceVariant, maxLines = 1, overflow = TextOverflow.Ellipsis)
             }
-            GsIconButton(Icons.Filled.Close, "Dismiss", { CarNotifications.dismissPopup(n.id) }, size = 40.dp, iconSize = 20.dp)
+            GsIconButton(Icons.Filled.Close, stringResource(R.string.msg_dismiss), { CarNotifications.dismissPopup(n.id) }, size = 40.dp, iconSize = 20.dp)
         }
         Row(horizontalArrangement = Arrangement.spacedBy(10.dp)) {
             GsButton(onClick = { VoiceReply.read(n) }, tone = GsTone.Neutral, modifier = Modifier.weight(1f)) {
                 ReadGlyph(Modifier.size(20.dp))
-                Text("Read", Modifier.padding(start = 8.dp))
+                Text(stringResource(R.string.msg_read), Modifier.padding(start = 8.dp))
             }
             if (n.reply != null) {
                 GsButton(onClick = { VoiceReply.reply(n) }, modifier = Modifier.weight(1f)) {
                     ReplyGlyph(Modifier.size(20.dp))
-                    Text("Reply", Modifier.padding(start = 8.dp))
+                    Text(stringResource(R.string.crumb_reply), Modifier.padding(start = 8.dp))
                 }
             }
         }
@@ -191,36 +194,36 @@ private fun VoiceReplyBody(s: VoiceReply.State, n: CarNotification) {
         when (s.phase) {
             VoiceReply.Phase.READING, VoiceReply.Phase.READ -> {
                 GsButton(onClick = VoiceReply::cancel, tone = GsTone.Neutral, modifier = wide) {
-                    Text(if (s.phase == VoiceReply.Phase.READING) "Stop" else "Close")
+                    Text(if (s.phase == VoiceReply.Phase.READING) stringResource(R.string.msg_stop) else stringResource(R.string.close))
                 }
                 if (n.reply != null) {
                     GsButton(onClick = { VoiceReply.reply(n, readFirst = false) }, modifier = wide) {
                         ReplyGlyph(Modifier.size(20.dp))
-                        Text("Reply", Modifier.padding(start = 8.dp))
+                        Text(stringResource(R.string.crumb_reply), Modifier.padding(start = 8.dp))
                     }
                 }
             }
             VoiceReply.Phase.OFFERING -> {
-                GsButton(onClick = VoiceReply::cancel, tone = GsTone.Neutral, modifier = wide) { Text("No") }
+                GsButton(onClick = VoiceReply::cancel, tone = GsTone.Neutral, modifier = wide) { Text(stringResource(R.string.msg_no)) }
                 GsButton(onClick = { VoiceReply.reply(n, readFirst = false) }, modifier = wide) {
                     ReplyGlyph(Modifier.size(20.dp))
-                    Text("Reply", Modifier.padding(start = 8.dp))
+                    Text(stringResource(R.string.crumb_reply), Modifier.padding(start = 8.dp))
                 }
             }
             VoiceReply.Phase.ASKING, VoiceReply.Phase.LISTENING ->
-                GsButton(onClick = VoiceReply::cancel, tone = GsTone.Neutral, modifier = wide) { Text("Cancel") }
+                GsButton(onClick = VoiceReply::cancel, tone = GsTone.Neutral, modifier = wide) { Text(stringResource(R.string.cancel)) }
             VoiceReply.Phase.CONFIRMING -> {
-                GsButton(onClick = VoiceReply::cancel, tone = GsTone.Neutral, modifier = wide) { Text("Cancel") }
-                GsButton(onClick = VoiceReply::sendNow, modifier = wide) { Text("Send now") }
+                GsButton(onClick = VoiceReply::cancel, tone = GsTone.Neutral, modifier = wide) { Text(stringResource(R.string.cancel)) }
+                GsButton(onClick = VoiceReply::sendNow, modifier = wide) { Text(stringResource(R.string.msg_send_now)) }
             }
             VoiceReply.Phase.ERROR -> {
-                GsButton(onClick = VoiceReply::cancel, tone = GsTone.Neutral, modifier = wide) { Text("Close") }
+                GsButton(onClick = VoiceReply::cancel, tone = GsTone.Neutral, modifier = wide) { Text(stringResource(R.string.close)) }
                 if (n.reply != null) {
-                    GsButton(onClick = { VoiceReply.reply(n, readFirst = false) }, tone = GsTone.Tonal, modifier = wide) { Text("Try again") }
+                    GsButton(onClick = { VoiceReply.reply(n, readFirst = false) }, tone = GsTone.Tonal, modifier = wide) { Text(stringResource(R.string.update_try_again)) }
                     GsButton(
                         onClick = { VoiceReply.cancel(); navigator.notifications(replyTo = n.key) },
                         tone = GsTone.Neutral, modifier = wide,
-                    ) { Text("Type") }
+                    ) { Text(stringResource(R.string.msg_type)) }
                 }
             }
             VoiceReply.Phase.SENT, VoiceReply.Phase.IDLE -> Unit
@@ -228,13 +231,14 @@ private fun VoiceReplyBody(s: VoiceReply.State, n: CarNotification) {
     }
 }
 
+@Composable
 private fun voiceHeading(s: VoiceReply.State, who: String): String = when (s.phase) {
     VoiceReply.Phase.READING, VoiceReply.Phase.READ -> who
-    VoiceReply.Phase.OFFERING, VoiceReply.Phase.ASKING -> "Reply to $who"
-    VoiceReply.Phase.LISTENING -> "Listening"
-    VoiceReply.Phase.CONFIRMING -> "Sending to $who"
-    VoiceReply.Phase.SENT -> "Sent to $who"
-    VoiceReply.Phase.ERROR -> "Couldn't reply"
+    VoiceReply.Phase.OFFERING, VoiceReply.Phase.ASKING -> stringResource(R.string.msg_reply_to, who)
+    VoiceReply.Phase.LISTENING -> stringResource(R.string.msg_listening)
+    VoiceReply.Phase.CONFIRMING -> stringResource(R.string.msg_sending_to, who)
+    VoiceReply.Phase.SENT -> stringResource(R.string.msg_sent_to, who)
+    VoiceReply.Phase.ERROR -> stringResource(R.string.msg_reply_failed)
     VoiceReply.Phase.IDLE -> ""
 }
 

gearslip/src/main/java/app/seb3thehacker/gearslip/car/MessagesScreen.kt

@@ -1,5 +1,8 @@
 package app.seb3thehacker.gearslip.car
 
+import androidx.compose.ui.res.pluralStringResource
+import androidx.compose.ui.res.stringResource
+import app.seb3thehacker.gearslip.R
 import app.seb3thehacker.gearslip.car.theme.*
 import android.content.Intent
 import android.provider.Settings
@@ -8,6 +11,8 @@ import androidx.compose.foundation.Image
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.ExperimentalLayoutApi
+import androidx.compose.foundation.layout.FlowRow
 import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.fillMaxSize
@@ -60,14 +65,14 @@ fun MessagesScreen(packageName: String) {
     val navigator = LocalCarNavigator.current
     val context = LocalContext.current.applicationContext
     val entry = remember(packageName) { findEntry(MESSAGING_PREFIX + packageName) }
-    val label = entry?.label ?: history.firstOrNull { it.packageName == packageName }?.appLabel ?: "Messages"
+    val label = entry?.label ?: history.firstOrNull { it.packageName == packageName }?.appLabel ?: stringResource(R.string.msg_messages)
     val threads = history.filter { it.packageName == packageName }
 
     LaunchedEffect(history) { CarNotifications.dismissPopupFrom(packageName) }
 
-    Column(Modifier.fillMaxSize().padding(16.dp), verticalArrangement = Arrangement.spacedBy(16.dp)) {
+    Column(Modifier.fillMaxSize().padding(start = 16.dp, end = 16.dp, top = 16.dp), verticalArrangement = Arrangement.spacedBy(16.dp)) {
         Row(verticalAlignment = Alignment.CenterVertically, horizontalArrangement = Arrangement.spacedBy(12.dp)) {
-            GsIconButton(Icons.AutoMirrored.Filled.ArrowBack, "Back", navigator::back)
+            GsIconButton(Icons.AutoMirrored.Filled.ArrowBack, stringResource(R.string.back), navigator::back)
             entry?.icon?.let { Image(it, contentDescription = null, modifier = Modifier.size(36.dp).clip(RoundedCornerShape(8.dp))) }
             Text(label, style = MaterialTheme.typography.headlineSmall, fontWeight = FontWeight.Bold)
         }
@@ -82,7 +87,7 @@ fun MessagesScreen(packageName: String) {
 
         if (threads.isEmpty()) {
             Text(
-                "No recent messages. New $label messages appear here as they arrive on the phone.",
+                stringResource(R.string.msg_none_recent, label),
                 style = MaterialTheme.typography.bodyLarge,
                 color = MaterialTheme.colorScheme.onSurfaceVariant,
             )
@@ -104,6 +109,7 @@ fun MessagesScreen(packageName: String) {
     }
 }
 
+@OptIn(ExperimentalLayoutApi::class)
 @Composable
 private fun ConversationCard(n: CarNotification, onRead: () -> Unit, onReply: () -> Unit, onMarkRead: () -> Unit) {
     var expanded by rememberSaveable(n.key) { mutableStateOf(false) }
@@ -143,40 +149,48 @@ private fun ConversationCard(n: CarNotification, onRead: () -> Unit, onReply: ()
                         color = MaterialTheme.colorScheme.onSurfaceVariant,
                         maxLines = 1,
                     )
+                    if (n.replied) {
+                        Icon(
+                            Icons.Filled.Check,
+                            contentDescription = stringResource(R.string.notif_replied),
+                            tint = MaterialTheme.colorScheme.primary,
+                            modifier = Modifier.padding(start = 8.dp).size(20.dp),
+                        )
+                    }
                 }
                 if (!expanded && lines.size > COLLAPSED_LINES) {
                     Text(
-                        "${lines.size - COLLAPSED_LINES} earlier",
+                        pluralStringResource(R.plurals.msg_earlier, lines.size - COLLAPSED_LINES, lines.size - COLLAPSED_LINES),
                         style = MaterialTheme.typography.labelMedium,
                         color = MaterialTheme.colorScheme.primary,
                     )
                 }
                 shown.forEach { MessageLine(it, showSender = n.isGroup) }
+                // Below the messages and side by side, so the text keeps the card's whole width.
+                FlowRow(
+                    Modifier.padding(top = 6.dp),
+                    horizontalArrangement = Arrangement.spacedBy(8.dp),
+                    verticalArrangement = Arrangement.spacedBy(8.dp),
+                ) {
+                    GsButton(onClick = onRead, tone = GsTone.Neutral) {
+                        ReadGlyph(Modifier.size(20.dp))
+                        Text(stringResource(R.string.msg_read), Modifier.padding(start = 8.dp))
+                    }
+                    if (n.reply != null) {
+                        GsButton(onClick = onReply, tone = GsTone.Tonal) {
+                            ReplyGlyph(Modifier.size(20.dp))
+                            Text(stringResource(R.string.crumb_reply), Modifier.padding(start = 8.dp))
+                        }
+                        GsButton(onClick = { quick = !quick }, tone = GsTone.Neutral) {
+                            Text(stringResource(if (quick) R.string.msg_hide_quick else R.string.msg_quick))
+                        }
+                    }
+                    if (n.markRead != null) {
+                        GsButton(onClick = onMarkRead, tone = GsTone.Neutral) { Text(stringResource(R.string.msg_mark_read)) }
+                    }
+                }
                 if (quick) QuickReplies(n, Modifier.padding(top = 6.dp))
             }
-            Column(horizontalAlignment = Alignment.End, verticalArrangement = Arrangement.spacedBy(8.dp)) {
-                if (n.replied) {
-                    Icon(Icons.Filled.Check, contentDescription = "Replied", tint = MaterialTheme.colorScheme.primary)
-                }
-                GsButton(onClick = onRead, tone = GsTone.Neutral) {
-                    ReadGlyph(Modifier.size(20.dp))
-                    Text("Read", Modifier.padding(start = 8.dp))
-                }
-                if (n.reply != null) {
-                    GsButton(onClick = onReply, tone = GsTone.Tonal) {
-                        ReplyGlyph(Modifier.size(20.dp))
-                        Text("Reply", Modifier.padding(start = 8.dp))
-                    }
-                }
-                if (n.reply != null) {
-                    GsButton(onClick = { quick = !quick }, tone = GsTone.Neutral) {
-                        Text(if (quick) "Hide quick replies" else "Quick reply")
-                    }
-                }
-                if (n.markRead != null) {
-                    GsButton(onClick = onMarkRead, tone = GsTone.Neutral) { Text("Mark read") }
-                }
-            }
         }
     }
 }
@@ -184,8 +198,8 @@ private fun ConversationCard(n: CarNotification, onRead: () -> Unit, onReply: ()
 @Composable
 private fun MessageLine(line: ChatLine, showSender: Boolean) {
     val who = when {
-        line.sender == null -> "You: "
-        showSender -> "${line.sender}: "
+        line.sender == null -> stringResource(R.string.msg_you)
+        showSender -> stringResource(R.string.msg_sender, line.sender)
         else -> ""
     }
     Text(

gearslip/src/main/java/app/seb3thehacker/gearslip/car/NavApps.kt

@@ -1,5 +1,8 @@
 package app.seb3thehacker.gearslip.car
 
+import androidx.annotation.StringRes
+import androidx.compose.ui.res.stringResource
+import app.seb3thehacker.gearslip.R
 import androidx.compose.foundation.Image
 import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
@@ -16,6 +19,7 @@ import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.layout.widthIn
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.List
 import androidx.compose.material.icons.filled.Call
 import androidx.compose.material.icons.filled.Info
 import androidx.compose.material.icons.filled.Search
@@ -65,26 +69,49 @@ private val CarGlyph: ImageVector = ImageVector.Builder("Car", 24.dp, 24.dp, 24f
  */
 internal class BuiltInApp(
     val id: String,
+    /** English, for matching what a driver says; [labelRes] is what the screen shows. */
     val label: String,
+    @param:StringRes val labelRes: Int,
     val glyph: ImageVector,
     val screen: CarScreen?,
     val open: (CarNavigator) -> Unit,
 )
 
 internal object BuiltInApps {
-    val Web = BuiltInApp("web", "Browser", Icons.Filled.Search, CarScreen.App("web")) { it.open("web") }
-    val ScreenSharing = BuiltInApp("phone", "Screen sharing", Icons.Filled.Share, CarScreen.App("phone")) { it.open("phone") }
-    val Phone = BuiltInApp("dialer", "Phone", Icons.Filled.Call, CarScreen.App("dialer")) { it.open("dialer") }
-    val VehicleData = BuiltInApp("vehicle", "Vehicle data", Icons.Filled.Info, CarScreen.VehicleData) { it.vehicleData() }
-    val Settings = BuiltInApp("settings", "Settings", Icons.Filled.Settings, CarScreen.Settings) { it.settings() }
+    val Web = BuiltInApp("web", "Browser", R.string.app_browser, Icons.Filled.Search, CarScreen.App("web")) { it.open("web") }
+    val ScreenSharing = BuiltInApp("phone", "Screen sharing", R.string.app_screen_sharing, Icons.Filled.Share, CarScreen.App("phone")) { it.open("phone") }
+    val Phone = BuiltInApp("dialer", "Phone", R.string.carset_phone, Icons.Filled.Call, CarScreen.App("dialer")) { it.open("dialer") }
+    val VehicleData = BuiltInApp("vehicle", "Vehicle data", R.string.car_vehicle_data, Icons.Filled.Info, CarScreen.VehicleData) { it.vehicleData() }
+    val Settings = BuiltInApp("settings", "Settings", R.string.settings_title, Icons.Filled.Settings, CarScreen.Settings) { it.settings() }
+
+    /** Launcher mode only: every app on the device, opened full screen. */
+    val AllApps = BuiltInApp("allapps", "All apps", R.string.app_all_apps, Icons.Filled.List, CarScreen.App("allapps")) { it.open("allapps") }
 
     /** Hands the screen back to the car's own interface, like Android Auto's Exit. */
-    val Exit = BuiltInApp("exit", "Exit", CarGlyph, screen = null) { CarFocus.exitToCar() }
+    val Exit = BuiltInApp("exit", "Exit", R.string.app_exit, CarGlyph, screen = null) { CarFocus.exitToCar() }
 
-    val all = listOf(Web, ScreenSharing, Phone, VehicleData, Settings, Exit)
-    val entries: List<Entry> = all.map { Entry(it.label, icon = null, builtIn = it) }
+    val all = listOf(Web, ScreenSharing, Phone, VehicleData, Settings, Exit, AllApps)
+    private val byApp = all.associateWith { Entry(it.label, icon = null, builtIn = it) }
+    val everyEntry: List<Entry> = byApp.values.toList()
+
+    /**
+     * The ones that make sense where the car UI is showing. As a device's own home screen there
+     * is no car to share the screen with or exit to, and no phone line on most head units.
+     */
+    fun entries(launcher: Boolean, canCall: Boolean): List<Entry> = byApp.filterKeys { app ->
+        when (app) {
+            AllApps -> launcher
+            ScreenSharing, Exit -> !launcher
+            Phone -> !launcher || canCall
+            else -> true
+        }
+    }.values.toList()
 }
 
+/** The name a driver sees: translated for Gearslip's own apps, the app's own name otherwise. */
+@Composable
+internal fun Entry.shownLabel(): String = builtIn?.let { stringResource(it.labelRes) } ?: label
+
 /** Vehicle data is experimental: raw, unverified sensor labels (see [CarSensors]). */
 @Composable
 internal fun rememberVehicleDataShown(): Boolean {
@@ -215,7 +242,7 @@ internal fun AppMenu(navigator: CarNavigator, running: Map<String, RunningSlot>)
                     entry.icon?.let { Image(it, null, Modifier.size(44.dp).clip(RoundedCornerShape(10.dp))) }
                     entry.builtIn?.let { Icon(it.glyph, null, Modifier.size(36.dp)) }
                     Text(
-                        entry.label,
+                        entry.shownLabel(),
                         style = MaterialTheme.typography.titleLarge,
                         fontWeight = FontWeight.SemiBold,
                         modifier = Modifier.padding(start = 14.dp),
@@ -232,9 +259,9 @@ internal fun AppMenu(navigator: CarNavigator, running: Map<String, RunningSlot>)
                 ) {
                     Text(
                         when {
-                            isPinned -> "Unpin from nav bar"
-                            barFull -> "Nav bar is full (${CarSettings.MAX_PINNED} pinned)"
-                            else -> "Pin to nav bar"
+                            isPinned -> stringResource(R.string.navapps_unpin)
+                            barFull -> stringResource(R.string.navapps_full, CarSettings.MAX_PINNED)
+                            else -> stringResource(R.string.navapps_pin)
                         },
                         style = MaterialTheme.typography.titleMedium,
                     )
@@ -248,13 +275,13 @@ internal fun AppMenu(navigator: CarNavigator, running: Map<String, RunningSlot>)
                         },
                         tone = GsTone.Danger,
                         modifier = Modifier.fillMaxWidth().height(56.dp),
-                    ) { Text("Close app", style = MaterialTheme.typography.titleMedium) }
+                    ) { Text(stringResource(R.string.navapps_close), style = MaterialTheme.typography.titleMedium) }
                 }
                 GsButton(
                     onClick = navigator::dismissAppMenu,
                     tone = GsTone.Neutral,
                     modifier = Modifier.fillMaxWidth().height(56.dp),
-                ) { Text("Cancel", style = MaterialTheme.typography.titleMedium) }
+                ) { Text(stringResource(R.string.cancel), style = MaterialTheme.typography.titleMedium) }
             }
         }
     }
@@ -267,7 +294,8 @@ internal fun AppMenu(navigator: CarNavigator, running: Map<String, RunningSlot>)
 @Composable
 private fun MoveButtons(id: String) {
     val custom by CarSettings.appOrder.collectAsState()
-    val order = launcherOrder(rememberAllEntries(), rememberVehicleDataShown(), custom).mapNotNull { it.componentId }
+    val hidden by CarSettings.hiddenApps.collectAsState()
+    val order = launcherOrder(rememberAllEntries(), rememberVehicleDataShown(), custom, hidden).mapNotNull { it.componentId }
     val index = order.indexOf(id)
     if (index < 0) return
     fun move(by: Int) {
@@ -281,19 +309,19 @@ private fun MoveButtons(id: String) {
             tone = GsTone.Tonal,
             enabled = index > 0,
             modifier = Modifier.weight(1f).height(56.dp),
-        ) { Text("Move left", style = MaterialTheme.typography.titleMedium) }
+        ) { Text(stringResource(R.string.navapps_move_left), style = MaterialTheme.typography.titleMedium) }
         GsButton(
             onClick = { move(1) },
             tone = GsTone.Tonal,
             enabled = index < order.lastIndex,
             modifier = Modifier.weight(1f).height(56.dp),
-        ) { Text("Move right", style = MaterialTheme.typography.titleMedium) }
+        ) { Text(stringResource(R.string.navapps_move_right), style = MaterialTheme.typography.titleMedium) }
     }
     if (custom.isNotEmpty()) {
         GsButton(
             onClick = { CarSettings.setAppOrder(emptyList()) },
             tone = GsTone.Neutral,
             modifier = Modifier.fillMaxWidth().height(56.dp),
-        ) { Text("Reset app order", style = MaterialTheme.typography.titleMedium) }
+        ) { Text(stringResource(R.string.navapps_reset), style = MaterialTheme.typography.titleMedium) }
     }
 }

gearslip/src/main/java/app/seb3thehacker/gearslip/car/NotificationsScreen.kt

@@ -1,5 +1,7 @@
 package app.seb3thehacker.gearslip.car
 
+import androidx.compose.ui.res.stringResource
+import app.seb3thehacker.gearslip.R
 import app.seb3thehacker.gearslip.car.theme.*
 import android.content.Intent
 import android.provider.Settings
@@ -79,12 +81,12 @@ fun NotificationsSection() {
     Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {
         Row(verticalAlignment = Alignment.CenterVertically) {
             Text(
-                "Notifications",
+                stringResource(R.string.notif_title),
                 style = MaterialTheme.typography.titleMedium,
                 color = MaterialTheme.colorScheme.primary,
                 modifier = Modifier.weight(1f),
             )
-            if (history.isNotEmpty()) TextButton(onClick = CarNotifications::clear) { Text("Clear all") }
+            if (history.isNotEmpty()) TextButton(onClick = CarNotifications::clear) { Text(stringResource(R.string.notif_clear_all)) }
         }
 
         if (!listening) {
@@ -97,7 +99,7 @@ fun NotificationsSection() {
 
         if (history.isEmpty()) {
             Text(
-                "Nothing yet. New notifications from the phone will show up here.",
+                stringResource(R.string.notif_empty),
                 style = MaterialTheme.typography.bodyMedium,
                 color = MaterialTheme.colorScheme.onSurfaceVariant,
             )
@@ -124,11 +126,11 @@ internal fun AccessBanner(onOpen: () -> Unit) {
         ) {
             Icon(Icons.Filled.Warning, contentDescription = null)
             Text(
-                "Notifications are off. Allow Gearslip under Settings > Notifications > Notification access on the phone.",
+                stringResource(R.string.notif_off),
                 style = MaterialTheme.typography.bodyMedium,
                 modifier = Modifier.weight(1f),
             )
-            GsButton(onClick = onOpen) { Text("Open") }
+            GsButton(onClick = onOpen) { Text(stringResource(R.string.guide_open)) }
         }
     }
 }
@@ -160,10 +162,10 @@ private fun NotificationRow(n: CarNotification, onReply: (CarNotification) -> Un
                 }
             }
             when {
-                n.replied -> Icon(Icons.Filled.Check, contentDescription = "Replied", tint = MaterialTheme.colorScheme.primary)
+                n.replied -> Icon(Icons.Filled.Check, contentDescription = stringResource(R.string.notif_replied), tint = MaterialTheme.colorScheme.primary)
                 n.reply != null -> GsButton(onClick = { VoiceReply.reply(n) }, tone = GsTone.Tonal) {
                     ReplyGlyph(Modifier.size(20.dp))
-                    Text("Reply", Modifier.padding(start = 8.dp))
+                    Text(stringResource(R.string.crumb_reply), Modifier.padding(start = 8.dp))
                 }
             }
         }
@@ -198,14 +200,14 @@ private fun ReplyPane(n: CarNotification, onDone: () -> Unit) {
             verticalAlignment = Alignment.CenterVertically,
             horizontalArrangement = Arrangement.spacedBy(8.dp),
         ) {
-            GsIconButton(Icons.AutoMirrored.Filled.ArrowBack, "Back", onDone)
+            GsIconButton(Icons.AutoMirrored.Filled.ArrowBack, stringResource(R.string.back), onDone)
             Surface(
                 shape = RoundedCornerShape(24.dp),
                 color = MaterialTheme.colorScheme.surfaceContainerHighest,
                 modifier = Modifier.weight(1f),
             ) {
                 Text(
-                    if (text.isEmpty()) "Reply to ${n.title.ifBlank { n.appLabel }}" else "$text|",
+                    if (text.isEmpty()) stringResource(R.string.msg_reply_to, n.title.ifBlank { n.appLabel }) else "$text|",
                     color = if (text.isEmpty()) MaterialTheme.colorScheme.onSurfaceVariant else MaterialTheme.colorScheme.onSurface,
                     maxLines = 1,
                     overflow = TextOverflow.Ellipsis,

gearslip/src/main/java/app/seb3thehacker/gearslip/car/PhoneAppsScreen.kt

@@ -1,5 +1,7 @@
 package app.seb3thehacker.gearslip.car
 
+import androidx.compose.ui.res.stringResource
+import app.seb3thehacker.gearslip.R
 import app.seb3thehacker.gearslip.car.theme.*
 import androidx.compose.foundation.Image
 import androidx.compose.foundation.layout.Arrangement
@@ -52,8 +54,8 @@ fun PhoneAppsScreen() {
         value = PhoneApps.cached() ?: withContext(Dispatchers.IO) { PhoneApps.installed(context).also { PhoneApps.warm(context) } }
     }
 
-    Column(Modifier.fillMaxSize().padding(horizontal = 20.dp, vertical = 12.dp)) {
-        ScreenHeader("Screen sharing")
+    Column(Modifier.fillMaxSize().padding(start = 20.dp, end = 20.dp, top = 12.dp)) {
+        ScreenHeader(stringResource(R.string.app_screen_sharing))
         Spacer(Modifier.height(12.dp))
         if (!TouchRelayService.enabled) {
             TouchRelayWarning()
@@ -63,7 +65,7 @@ fun PhoneAppsScreen() {
         LazyVerticalGrid(
             columns = GridCells.Adaptive(minSize = 108.dp),
             modifier = Modifier.fillMaxSize(),
-            contentPadding = PaddingValues(bottom = 8.dp),
+            contentPadding = PaddingValues(bottom = 16.dp),
             horizontalArrangement = Arrangement.spacedBy(12.dp),
             verticalArrangement = Arrangement.spacedBy(12.dp),
         ) {
@@ -94,17 +96,17 @@ private fun TouchRelayWarning() {
         ) {
             Icon(Icons.Filled.Warning, contentDescription = null)
             Text(
-                "Touch is off. Enable Gearslip under Settings > Accessibility on the phone.",
+                stringResource(R.string.phoneapps_touch_off),
                 style = MaterialTheme.typography.bodyMedium,
                 modifier = Modifier.weight(1f),
             )
-            GsButton(onClick = { PhoneApps.openAccessibilitySettings(context) }) { Text("Open") }
+            GsButton(onClick = { PhoneApps.openAccessibilitySettings(context) }) { Text(stringResource(R.string.guide_open)) }
         }
     }
 }
 
 @Composable
-private fun PhoneAppTile(app: PhoneApp, onClick: () -> Unit) {
+internal fun PhoneAppTile(app: PhoneApp, onClick: () -> Unit) {
     GsIconBox(
         onClick = onClick,
         modifier = Modifier.height(120.dp),

gearslip/src/main/java/app/seb3thehacker/gearslip/car/PhoneDialerScreen.kt

@@ -1,5 +1,7 @@
 package app.seb3thehacker.gearslip.car
 
+import androidx.compose.ui.res.stringResource
+import app.seb3thehacker.gearslip.R
 import app.seb3thehacker.gearslip.car.theme.*
 import android.Manifest
 import android.content.Context
@@ -12,6 +14,7 @@ import app.seb3thehacker.gearslip.GearslipLog
 import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.interaction.MutableInteractionSource
+import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
@@ -136,13 +139,13 @@ fun PhoneDialerScreen() {
     var hasPermissions by remember { mutableStateOf(hasCallPermissions(context)) }
     var tab by remember { mutableStateOf(TAB_CONTACTS) }
 
-    Column(Modifier.fillMaxSize().padding(16.dp), verticalArrangement = Arrangement.spacedBy(16.dp)) {
+    Column(Modifier.fillMaxSize().padding(start = 16.dp, end = 16.dp, top = 16.dp), verticalArrangement = Arrangement.spacedBy(16.dp)) {
         // The tabs share the title's row, so the list and keypad get the height back.
-        ScreenHeader("Phone") {
+        ScreenHeader(stringResource(R.string.carset_phone)) {
             if (hasPermissions) {
                 Row(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
-                    DialerTab("Contacts", tab == TAB_CONTACTS, Modifier.width(140.dp)) { tab = TAB_CONTACTS }
-                    DialerTab("Keypad", tab == TAB_KEYPAD, Modifier.width(140.dp)) { tab = TAB_KEYPAD }
+                    DialerTab(stringResource(R.string.dialer_contacts), tab == TAB_CONTACTS, Modifier.width(140.dp)) { tab = TAB_CONTACTS }
+                    DialerTab(stringResource(R.string.dialer_keypad), tab == TAB_KEYPAD, Modifier.width(140.dp)) { tab = TAB_KEYPAD }
                 }
             }
         }
@@ -153,7 +156,7 @@ fun PhoneDialerScreen() {
         }
 
         Box(Modifier.weight(1f).fillMaxWidth()) {
-            if (tab == TAB_CONTACTS) ContactsList(context) else Keypad(context)
+            if (tab == TAB_CONTACTS) ContactsList(context) else Box(Modifier.padding(bottom = 16.dp)) { Keypad(context) }
         }
     }
 }
@@ -168,14 +171,13 @@ private fun MissingPermission(context: Context, onGranted: () -> Unit) {
     }
     Column(verticalArrangement = Arrangement.spacedBy(12.dp)) {
         Text(
-            "Gearslip needs the Phone and Contacts permissions to dial from here. Allow them on " +
-                "the phone when you're parked.",
+            stringResource(R.string.dialer_needs_permission),
             style = MaterialTheme.typography.bodyLarge,
             color = MaterialTheme.colorScheme.onSurfaceVariant,
         )
         GsButton(tone = GsTone.Tonal, onClick = {
             app.seb3thehacker.gearslip.PermissionActivity.ask(context, CALL_PERMISSIONS)
-        }) { Text("Ask on the phone") }
+        }) { Text(stringResource(R.string.dialer_ask)) }
     }
 }
 
@@ -211,7 +213,7 @@ private fun Keypad(context: Context) {
 
     Column(Modifier.fillMaxSize(), verticalArrangement = Arrangement.spacedBy(12.dp)) {
         Text(
-            number.ifEmpty { "Enter a number" },
+            number.ifEmpty { stringResource(R.string.dialer_enter_number) },
             style = MaterialTheme.typography.headlineSmall,
             color = if (number.isEmpty()) MaterialTheme.colorScheme.onSurfaceVariant else MaterialTheme.colorScheme.onSurface,
             maxLines = 1,
@@ -240,7 +242,7 @@ private fun Keypad(context: Context) {
                     colors = gsColors(GsTone.Primary),
                     enabled = number.isNotEmpty(),
                     modifier = Modifier.weight(1f).fillMaxWidth(),
-                ) { Icon(Icons.Filled.Call, "Call") }
+                ) { Icon(Icons.Filled.Call, stringResource(R.string.dialer_call)) }
             }
         }
     }
@@ -282,16 +284,16 @@ private fun ContactsList(context: Context) {
         Box(Modifier.weight(1f).fillMaxWidth()) {
             when {
                 contacts.isEmpty() -> Text(
-                    "No contacts with a phone number found.",
+                    stringResource(R.string.dialer_no_contacts),
                     style = MaterialTheme.typography.bodyLarge,
                     color = MaterialTheme.colorScheme.onSurfaceVariant,
                 )
                 filtered.isEmpty() -> Text(
-                    "No contacts match \"$query\".",
+                    stringResource(R.string.dialer_no_match, query),
                     style = MaterialTheme.typography.bodyLarge,
                     color = MaterialTheme.colorScheme.onSurfaceVariant,
                 )
-                else -> LazyColumn(Modifier.fillMaxSize(), verticalArrangement = Arrangement.spacedBy(8.dp)) {
+                else -> LazyColumn(Modifier.fillMaxSize(), contentPadding = PaddingValues(bottom = 16.dp), verticalArrangement = Arrangement.spacedBy(8.dp)) {
                     items(filtered) { contact ->
                         ContactRow(contact) { pendingCall = contact }
                     }
@@ -344,14 +346,14 @@ private fun ConfirmCallOverlay(contact: Contact, onConfirm: () -> Unit, onDismis
                 verticalArrangement = Arrangement.spacedBy(20.dp),
                 horizontalAlignment = Alignment.CenterHorizontally,
             ) {
-                Text("Call ${contact.name}?", style = MaterialTheme.typography.headlineSmall, fontWeight = FontWeight.Bold)
+                Text(stringResource(R.string.dialer_call_who, contact.name), style = MaterialTheme.typography.headlineSmall, fontWeight = FontWeight.Bold)
                 Text(contact.number, style = MaterialTheme.typography.titleLarge, color = MaterialTheme.colorScheme.onSurfaceVariant)
                 Row(Modifier.fillMaxWidth(), horizontalArrangement = Arrangement.spacedBy(16.dp)) {
                     GsButton(onClick = onDismiss, tone = GsTone.Outline, modifier = Modifier.weight(1f).height(56.dp)) {
-                        Text("Cancel", style = MaterialTheme.typography.titleMedium)
+                        Text(stringResource(R.string.cancel), style = MaterialTheme.typography.titleMedium)
                     }
                     GsButton(onClick = onConfirm, modifier = Modifier.weight(1f).height(56.dp)) {
-                        Text("Call", style = MaterialTheme.typography.titleMedium)
+                        Text(stringResource(R.string.dialer_call), style = MaterialTheme.typography.titleMedium)
                     }
                 }
             }
@@ -368,7 +370,7 @@ private fun ContactSearchField(query: String, active: Boolean, onToggle: () -> U
         modifier = Modifier.fillMaxWidth(),
     ) {
         Text(
-            query.ifEmpty { "Search contacts" },
+            query.ifEmpty { stringResource(R.string.dialer_search) },
             style = MaterialTheme.typography.bodyLarge,
             color = if (query.isEmpty()) MaterialTheme.colorScheme.onSurfaceVariant else MaterialTheme.colorScheme.onSurface,
             maxLines = 1,
@@ -406,7 +408,7 @@ private fun ContactRow(contact: Contact, onClick: () -> Unit) {
                 Text(contact.name, style = MaterialTheme.typography.titleMedium, maxLines = 1, overflow = TextOverflow.Ellipsis)
                 Text(contact.number, style = MaterialTheme.typography.bodyMedium, color = MaterialTheme.colorScheme.onSurfaceVariant)
             }
-            Icon(Icons.Filled.Call, contentDescription = "Call", tint = MaterialTheme.colorScheme.primary)
+            Icon(Icons.Filled.Call, contentDescription = stringResource(R.string.dialer_call), tint = MaterialTheme.colorScheme.primary)
         }
     }
 }

gearslip/src/main/java/app/seb3thehacker/gearslip/car/PlayerParts.kt

@@ -1,5 +1,7 @@
 package app.seb3thehacker.gearslip.car
 
+import androidx.compose.ui.res.stringResource
+import app.seb3thehacker.gearslip.R
 import android.media.session.PlaybackState
 import android.support.v4.media.session.PlaybackStateCompat
 import androidx.compose.foundation.layout.Arrangement
@@ -94,23 +96,23 @@ internal fun formatDuration(ms: Long): String {
     return if (hours > 0) "%d:%02d:%02d".format(hours, minutes, seconds) else "%d:%02d".format(minutes, seconds)
 }
 
-/** Previous, play/pause, next. [skip] sizes the outer two; play is a step bigger. */
+/** Previous, play/pause, next. [skip] sizes the outer two; play is [playScale] times bigger. */
 @Composable
-internal fun TransportRow(now: NowPlaying, media: CarMedia, skip: Dp, modifier: Modifier = Modifier) {
-    val play = skip * 1.25f
+internal fun TransportRow(now: NowPlaying, media: CarMedia, skip: Dp, modifier: Modifier = Modifier, playScale: Float = 1.25f) {
+    val play = skip * playScale
     Row(modifier, horizontalArrangement = Arrangement.SpaceEvenly, verticalAlignment = Alignment.CenterVertically) {
         GsIconButton(
-            MediaIcons.Previous, "Previous", media::previous,
+            MediaIcons.Previous, stringResource(R.string.player_previous), media::previous,
             enabled = now.canDo(PlaybackState.ACTION_SKIP_TO_PREVIOUS), size = skip, iconSize = skip * 0.58f, shape = CircleShape,
         )
         GsIconButton(
             if (now.playing) MediaIcons.Pause else Icons.Filled.PlayArrow,
-            if (now.playing) "Pause" else "Play",
+            stringResource(if (now.playing) R.string.player_pause else R.string.media_play),
             media::togglePlay,
             tone = GsTone.Primary, size = play, iconSize = play * 0.58f, shape = CircleShape,
         )
         GsIconButton(
-            MediaIcons.Next, "Next", media::next,
+            MediaIcons.Next, stringResource(R.string.player_next), media::next,
             enabled = now.canDo(PlaybackState.ACTION_SKIP_TO_NEXT), size = skip, iconSize = skip * 0.58f, shape = CircleShape,
         )
     }
@@ -143,11 +145,11 @@ internal fun PlayModeRow(
         // Gearslip's own stand in for apps that report a heart rating or shuffle and repeat modes.
         val likeAction = now.likeAction
         if (likeAction != null) {
-            CustomActionButton(likeAction, media, size, toggle = true)
+            CustomActionButton(likeAction, media, size, on = liked == true)
         } else {
             GsIconButton(
                 if (liked == true) Icons.Filled.Favorite else Icons.Filled.FavoriteBorder,
-                if (liked == true) "Unlike" else "Like",
+                stringResource(if (liked == true) R.string.player_unlike else R.string.player_like),
                 media::toggleLike,
                 enabled = liked != null,
                 tone = if (liked == true) GsTone.Primary else GsTone.Neutral,
@@ -156,10 +158,10 @@ internal fun PlayModeRow(
         }
         val shuffleAction = now.shuffleAction
         if (shuffleAction != null) {
-            CustomActionButton(shuffleAction, media, size, toggle = true)
+            CustomActionButton(shuffleAction, media, size, on = shuffleAction.on)
         } else {
             GsIconButton(
-                MediaIcons.Shuffle, if (shuffleOn) "Shuffle off" else "Shuffle on",
+                MediaIcons.Shuffle, stringResource(if (shuffleOn) R.string.player_shuffle_off else R.string.player_shuffle_on),
                 media::toggleShuffle,
                 enabled = shuffleKnown,
                 tone = if (shuffleOn) GsTone.Primary else GsTone.Neutral,
@@ -168,11 +170,11 @@ internal fun PlayModeRow(
         }
         val repeatAction = now.repeatAction
         if (repeatAction != null) {
-            CustomActionButton(repeatAction, media, size, toggle = true)
+            CustomActionButton(repeatAction, media, size, on = repeatAction.on)
         } else {
             GsIconButton(
                 if (modes.repeat == PlaybackStateCompat.REPEAT_MODE_ONE) MediaIcons.RepeatOne else MediaIcons.Repeat,
-                "Repeat",
+                stringResource(R.string.player_repeat),
                 media::cycleRepeat,
                 enabled = repeatKnown,
                 tone = if (repeatOn) GsTone.Primary else GsTone.Neutral,
@@ -189,12 +191,12 @@ internal fun PlayModeRow(
  * not Gearslip's, so it's loaded from there. Its name stands in if the icon won't load.
  */
 @Composable
-private fun CustomActionButton(action: CustomAction, media: CarMedia, size: Dp, toggle: Boolean = false) {
+private fun CustomActionButton(action: CustomAction, media: CarMedia, size: Dp, on: Boolean = false) {
     val icon = rememberActionIcon(action)
     GsIconBox(
         onClick = { media.custom(action) },
         modifier = Modifier.size(size),
-        colors = gsColors(if (toggle && action.on) GsTone.Primary else GsTone.Neutral),
+        colors = gsColors(if (on) GsTone.Primary else GsTone.Neutral),
     ) {
         if (icon != null) {
             Icon(icon, action.name, Modifier.size(size * 0.52f))
@@ -229,26 +231,48 @@ internal fun rememberArt(now: NowPlaying): android.graphics.Bitmap? {
 }
 
 /**
- * A background taken from the album art's main colour, in place of [fallback]. Only the hue and a
- * capped amount of its saturation come from the art; the lightness stays close to the theme's
- * own ([darkLightness] or [lightLightness]), so text drawn in the theme's colours reads the same
- * on any cover. Art with no real colour in it keeps [fallback]. Fades between songs rather than
- * jumping.
+ * Three soft pools of the cover's colours: top left, top right and the middle, read off a 3x3
+ * shrink of it. Still, and redrawn only while a new song's colours fade in, so it costs the video
+ * stream nothing between songs. Fainter on a light card, where colour shows more. [wide] is for
+ * a whole screen: the pools gather on its left, behind the cover, and reach less far across it.
  */
 @Composable
-internal fun rememberArtColor(
-    art: android.graphics.Bitmap?,
-    fallback: Color,
-    darkLightness: Float = 0.2f,
-    lightLightness: Float = 0.86f,
-): Color {
-    val dark = fallback.luminance() < 0.5f
-    val tint by produceState<ArtColor.Tint?>(null, art) {
-        value = art?.let { withContext(Dispatchers.Default) { runCatching { ArtColor.of(it) }.getOrNull() } }
+internal fun AlbumGlow(art: android.graphics.Bitmap?, modifier: Modifier, wide: Boolean = false) {
+    val spots by produceState<List<Color>>(emptyList(), art) {
+        value = art?.let { kotlinx.coroutines.withContext(kotlinx.coroutines.Dispatchers.Default) { glowColours(it) } }.orEmpty()
+    }
+    val strength = if (MaterialTheme.colorScheme.surface.luminance() < 0.5f) 0.30f else 0.18f
+    val fade = tween<Color>(600)
+    val first by androidx.compose.animation.animateColorAsState(spots.getOrNull(0)?.copy(alpha = strength) ?: Color.Transparent, fade, label = "glow")
+    val second by androidx.compose.animation.animateColorAsState(spots.getOrNull(1)?.copy(alpha = strength) ?: Color.Transparent, fade, label = "glow")
+    val third by androidx.compose.animation.animateColorAsState(spots.getOrNull(2)?.copy(alpha = strength * 0.8f) ?: Color.Transparent, fade, label = "glow")
+    androidx.compose.foundation.Canvas(modifier) {
+        fun pool(colour: Color, x: Float, y: Float, reach: Float) {
+            if (colour.alpha <= 0f) return
+            drawRect(
+                androidx.compose.ui.graphics.Brush.radialGradient(
+                    listOf(colour, Color.Transparent),
+                    center = androidx.compose.ui.geometry.Offset(size.width * x, size.height * y),
+                    radius = size.width * reach,
+                ),
+            )
+        }
+        if (wide) {
+            pool(third, 0.22f, 0.8f, 0.35f)
+            pool(first, 0.1f, 0.25f, 0.42f)
+            pool(second, 0.3f, 0.45f, 0.38f)
+        } else {
+            pool(third, 0.5f, 0.5f, 0.85f)
+            pool(first, 0.2f, 0.1f, 0.9f)
+            pool(second, 0.85f, 0.22f, 0.8f)
+        }
     }
-    val target = tint?.let {
-        if (dark) Color.hsl(it.hue, it.saturation.coerceIn(0.3f, 0.5f), darkLightness)
-        else Color.hsl(it.hue, it.saturation.coerceIn(0.35f, 0.55f), lightLightness)
-    } ?: fallback
-    return animateColorAsState(target, tween(600), label = "art colour").value
+}
+
+/** The cover's colours at its top left, top right and middle. */
+private fun glowColours(art: android.graphics.Bitmap): List<Color> {
+    // A hardware bitmap can't be scaled or read on the CPU, so copy it out first.
+    val readable = if (art.config == android.graphics.Bitmap.Config.HARDWARE) art.copy(android.graphics.Bitmap.Config.ARGB_8888, false) else art
+    val small = android.graphics.Bitmap.createScaledBitmap(readable ?: return emptyList(), 3, 3, true)
+    return listOf(small.getPixel(0, 0), small.getPixel(2, 0), small.getPixel(1, 1)).map { Color(it).copy(alpha = 1f) }
 }

gearslip/src/main/java/app/seb3thehacker/gearslip/car/SavedPlaces.kt

@@ -0,0 +1,114 @@
+package app.seb3thehacker.gearslip.car
+
+import android.Manifest
+import android.content.Context
+import android.content.pm.PackageManager
+import android.location.Geocoder
+import android.location.Location
+import android.location.LocationManager
+import app.seb3thehacker.gearslip.AppSettings
+import app.seb3thehacker.gearslip.GearslipLog
+import java.util.Locale
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.suspendCancellableCoroutine
+import kotlinx.coroutines.withContext
+import kotlinx.coroutines.withTimeoutOrNull
+import org.json.JSONArray
+import org.json.JSONObject
+import kotlin.coroutines.resume
+
+/** One saved place. Home and Work keep a blank [label]; their names come from strings.xml. */
+data class SavedPlace(val label: String = "", val address: String = "")
+
+/**
+ * Up to [COUNT] places a driver can name by voice in any map app: slot [HOME], slot [WORK],
+ * then three they name themselves. "Navigate home" sends the saved address as the search.
+ */
+object SavedPlaces {
+
+    const val COUNT = 5
+    const val HOME = 0
+    const val WORK = 1
+
+    private const val KEY = "saved_places"
+
+    private val HOME_WORDS = setOf("home", "house", "place", "home address", "my home", "my house", "my place")
+    private val WORK_WORDS = setOf("work", "office", "job", "work address", "my work", "my office", "my job", "the office")
+
+    fun all(context: Context): List<SavedPlace> {
+        val saved = runCatching {
+            val array = JSONArray(AppSettings.getString(context, KEY, "[]"))
+            List(array.length()) { i ->
+                array.getJSONObject(i).let { SavedPlace(it.optString("label"), it.optString("address")) }
+            }
+        }.getOrDefault(emptyList())
+        return List(COUNT) { saved.getOrNull(it) ?: SavedPlace() }
+    }
+
+    fun set(context: Context, index: Int, place: SavedPlace) {
+        val next = all(context).toMutableList().also { it[index] = place }
+        val array = JSONArray()
+        next.forEach { array.put(JSONObject().put("label", it.label).put("address", it.address)) }
+        AppSettings.putString(context, KEY, array.toString())
+    }
+
+    /**
+     * The slot [spoken] names, if any: "home", "my house", "work", or a custom label. Returns the
+     * slot even when its address is blank, so the assistant can say it isn't set yet.
+     */
+    fun match(context: Context, spoken: String): Pair<Int, SavedPlace>? {
+        val said = spoken.lowercase().trim()
+        val places = all(context)
+        if (said in HOME_WORDS) return HOME to places[HOME]
+        if (said in WORK_WORDS) return WORK to places[WORK]
+        val squashed = squash(said.removePrefix("my ").removePrefix("the "))
+        if (squashed.isEmpty()) return null
+        places.forEachIndexed { i, place ->
+            if (i > WORK && place.label.isNotBlank() && squash(place.label) == squashed) return i to place
+        }
+        return null
+    }
+
+    private fun squash(s: String) = s.lowercase().filter { it.isLetterOrDigit() }
+
+    fun hasLocationPermission(context: Context) =
+        context.checkSelfPermission(Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED ||
+            context.checkSelfPermission(Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_GRANTED
+
+    /** Where the phone is now, as a street address, or as coordinates when there's no geocoder. Null if unknown. */
+    suspend fun here(context: Context): String? = withContext(Dispatchers.IO) {
+        val location = locate(context) ?: return@withContext null
+        val address = runCatching {
+            if (!Geocoder.isPresent()) return@runCatching null
+            @Suppress("DEPRECATION")
+            Geocoder(context, Locale.getDefault()).getFromLocation(location.latitude, location.longitude, 1)
+                ?.firstOrNull()?.getAddressLine(0)
+        }.getOrNull()
+        address ?: "%.6f,%.6f".format(Locale.US, location.latitude, location.longitude)
+    }
+
+    private suspend fun locate(context: Context): Location? {
+        if (!hasLocationPermission(context)) return null
+        val manager = context.getSystemService(LocationManager::class.java) ?: return null
+        val provider = listOf(LocationManager.FUSED_PROVIDER, LocationManager.GPS_PROVIDER, LocationManager.NETWORK_PROVIDER)
+            .firstOrNull { it in manager.allProviders && manager.isProviderEnabled(it) }
+        // A fresh fix: saving the spot you're standing on wants better than an hour-old one.
+        val fresh = provider?.let {
+            withTimeoutOrNull(FIX_TIMEOUT_MS) {
+                suspendCancellableCoroutine { done ->
+                    runCatching {
+                        manager.getCurrentLocation(it, null, context.mainExecutor) { fix -> done.resume(fix) }
+                    }.onFailure { e ->
+                        GearslipLog.w("places: fix failed: ${e.message}")
+                        done.resume(null)
+                    }
+                }
+            }
+        }
+        return fresh ?: manager.allProviders
+            .mapNotNull { runCatching { manager.getLastKnownLocation(it) }.getOrNull() }
+            .maxByOrNull { it.time }
+    }
+
+    private const val FIX_TIMEOUT_MS = 15_000L
+}

gearslip/src/main/java/app/seb3thehacker/gearslip/car/ScreenHeader.kt

@@ -1,5 +1,7 @@
 package app.seb3thehacker.gearslip.car
 
+import androidx.compose.ui.res.stringResource
+import app.seb3thehacker.gearslip.R
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.RowScope
@@ -29,7 +31,7 @@ fun ScreenHeader(title: String, modifier: Modifier = Modifier, trailing: @Compos
         verticalAlignment = Alignment.CenterVertically,
         horizontalArrangement = Arrangement.spacedBy(12.dp),
     ) {
-        GsIconButton(Icons.AutoMirrored.Filled.ArrowBack, "Back", navigator::back)
+        GsIconButton(Icons.AutoMirrored.Filled.ArrowBack, stringResource(R.string.back), navigator::back)
         Text(
             title,
             style = MaterialTheme.typography.headlineSmall,

gearslip/src/main/java/app/seb3thehacker/gearslip/car/TemplateChrome.kt

@@ -1,5 +1,7 @@
 package app.seb3thehacker.gearslip.car
 
+import androidx.compose.ui.res.stringResource
+import app.seb3thehacker.gearslip.R
 import app.seb3thehacker.gearslip.car.theme.*
 import android.graphics.Rect
 import androidx.compose.foundation.layout.widthIn
@@ -99,11 +101,12 @@ fun TemplateChrome(template: Template?, modifier: Modifier = Modifier) {
  * A template that isn't map-backed covers the surface completely, and reporting an empty
  * rectangle is how the app is told to stop bothering.
  */
-fun visibleAreaFor(template: Template?, width: Int, height: Int, measured: Rect? = null): Rect = when (template) {
+fun visibleAreaFor(template: Template?, width: Int, height: Int, measured: Rect? = null, cardsAtEnd: Boolean = false): Rect = when (template) {
     is NavigationTemplate -> measured ?: Rect(0, 0, width, height)
     is MapWithContentTemplate, is MapTemplate, is PlaceListNavigationTemplate,
     is RoutePreviewNavigationTemplate, is PlaceListMapTemplate,
-    -> measured ?: Rect((width * CARD_COLUMN_FRACTION).toInt(), 0, width, height)
+    -> measured ?: if (cardsAtEnd) Rect(0, 0, (width * (1 - CARD_COLUMN_FRACTION)).toInt(), height)
+    else Rect((width * CARD_COLUMN_FRACTION).toInt(), 0, width, height)
     null -> Rect(0, 0, width, height)
     else -> Rect(0, 0, 0, 0)
 }
@@ -152,6 +155,24 @@ internal class ChromeCover {
 
 internal val LocalChromeCover = compositionLocalOf<ChromeCover?> { null }
 
+/**
+ * The app's cards go to the far edge of the map and its buttons to the near one, set while the
+ * player is docked on the left: the player, the map and the cards each keep their own space
+ * instead of the cards crowding up against the player.
+ */
+internal val LocalCardsAtEnd = compositionLocalOf { false }
+
+/**
+ * How much of the map's width the docked player floats over, on the side opposite the cards. The
+ * map itself runs underneath at full size; the app is told this part is covered, and the chrome
+ * keeps clear of it.
+ */
+internal val LocalSidePanelInset = compositionLocalOf { 0.dp }
+
+/** The edge the app's cards cover, and the one its map buttons do. */
+internal val cardEdge @Composable get() = if (LocalCardsAtEnd.current) CoverEdge.END else CoverEdge.START
+internal val buttonEdge @Composable get() = if (LocalCardsAtEnd.current) CoverEdge.START else CoverEdge.END
+
 /**
  * The floating nav bar, as far as the app's map is concerned. Its full [height] at once rather
  * than following the slide, so the app is told once instead of every frame.
@@ -196,12 +217,15 @@ private fun NavigationBars(
 ) {
     val connection = LocalCarAppConnection.current
     val pan by connection.panMode.collectAsState()
+    val atEnd = LocalCardsAtEnd.current
+    val cardEdge = cardEdge
+    val buttonEdge = buttonEdge
     androidx.compose.foundation.layout.BoxWithConstraints(modifier.fillMaxSize()) {
         val column = cardColumnWidth(maxWidth)
-        Row(Modifier.fillMaxSize()) {
+        val cards = @Composable {
             if (routing != null || estimate != null) {
                 Column(
-                    Modifier.width(column).fillMaxHeight().covers("nav-cards", CoverEdge.START).padding(12.dp),
+                    Modifier.width(column).fillMaxHeight().covers("nav-cards", cardEdge).padding(12.dp),
                     verticalArrangement = Arrangement.spacedBy(12.dp),
                 ) {
                     routing?.let { RoutingCard(it, Modifier.fillMaxWidth()) }
@@ -209,14 +233,21 @@ private fun NavigationBars(
                     estimate?.let { TravelEstimateCard(it, Modifier.fillMaxWidth()) }
                 }
             }
-            Spacer(Modifier.weight(1f))
+        }
+        val buttons = @Composable {
             RightEdgeControls(
                 if (pan) null else template.actionStrip,
                 template.mapActionStrip,
                 Modifier.padding(12.dp),
-                mapActionsModifier = Modifier.covers("nav-buttons", CoverEdge.END),
+                mapActionsModifier = Modifier.covers("nav-buttons", buttonEdge),
+                alignment = if (atEnd) Alignment.Start else Alignment.End,
             )
         }
+        Row(Modifier.fillMaxSize()) {
+            if (atEnd) buttons() else cards()
+            Spacer(Modifier.weight(1f))
+            if (atEnd) cards() else buttons()
+        }
     }
 }
 
@@ -228,7 +259,7 @@ private fun NavigationBars(
 private fun RoutingCard(info: RoutingInfo, modifier: Modifier = Modifier) {
     if (info.isLoading) {
         ChromeSurface(modifier) {
-            Text("Finding a route…", Modifier.padding(horizontal = 18.dp, vertical = 16.dp), style = ChromeType.title)
+            Text(stringResource(R.string.nav_finding_route), Modifier.padding(horizontal = 18.dp, vertical = 16.dp), style = ChromeType.title)
         }
         return
     }
@@ -283,7 +314,7 @@ private fun RoutingCard(info: RoutingInfo, modifier: Modifier = Modifier) {
                     Modifier.fillMaxWidth().padding(horizontal = 16.dp, vertical = 10.dp),
                     verticalAlignment = Alignment.CenterVertically,
                 ) {
-                    Text("Then", style = ChromeType.label, color = scheme.onSurfaceVariant)
+                    Text(stringResource(R.string.nav_then), style = ChromeType.label, color = scheme.onSurfaceVariant)
                     Spacer(Modifier.width(10.dp))
                     CarGlyph(next.maneuver?.icon, Modifier.size(28.dp))
                     val nextText = next.cue.text().ifEmpty { next.road.text() }
@@ -345,7 +376,7 @@ private fun LaneTile(lane: Lane) {
     ) {
         Icon(
             Icons.Filled.KeyboardArrowUp,
-            contentDescription = if (recommended) "Recommended lane" else "Lane",
+            contentDescription = stringResource(if (recommended) R.string.nav_lane_recommended else R.string.nav_lane),
             tint = if (recommended) MaterialTheme.colorScheme.onPrimaryContainer
             else MaterialTheme.colorScheme.onSurfaceVariant,
             modifier = Modifier.size(24.dp).rotate(shown.turnDegrees()),
@@ -398,7 +429,7 @@ private fun TravelEstimateCard(estimate: TravelEstimate, modifier: Modifier = Mo
                     )
                 }
                 val detail = listOfNotNull(
-                    arrival.takeIf { it.isNotEmpty() }?.let { "Arrive $it" },
+                    arrival.takeIf { it.isNotEmpty() }?.let { stringResource(R.string.nav_arrive, it) },
                     distance.takeIf { it.isNotEmpty() },
                 ).joinToString("  •  ")
                 if (detail.isNotEmpty()) {
@@ -413,7 +444,7 @@ private fun TravelEstimateCard(estimate: TravelEstimate, modifier: Modifier = Mo
             // pops the on-screen card, leaving the app still believing it is navigating.
             GsIconButton(
                 Icons.Filled.Close,
-                "Stop navigating",
+                stringResource(R.string.nav_stop),
                 { connection.stopNavigating() },
                 colors = GsColors(MaterialTheme.colorScheme.surfaceContainerHighest, MaterialTheme.colorScheme.onSurface),
                 size = 52.dp,
@@ -445,12 +476,14 @@ private fun MapPaneLayout(
     // Pan mode hands the whole screen to the map, leaving only its own controls.
     val pan by connection.panMode.collectAsState()
     val edgeActions = (actionStrip?.actions.orEmpty() + mapActionStrip?.actions.orEmpty()).map { it.identity() }.toSet()
+    val atEnd = LocalCardsAtEnd.current
+    val cardEdge = cardEdge
     androidx.compose.foundation.layout.BoxWithConstraints(modifier.fillMaxWidth()) {
         if (!pan) {
             ChromeSurface(
                 Modifier
-                    .align(Alignment.TopStart)
-                    .covers("map-pane", CoverEdge.START)
+                    .align(if (atEnd) Alignment.TopEnd else Alignment.TopStart)
+                    .covers("map-pane", cardEdge)
                     .padding(12.dp)
                     .width(cardColumnWidth(maxWidth) - 24.dp)
                     .let { if (fullHeight) it.height(maxHeight - 24.dp) else it.heightIn(max = maxHeight - 24.dp) },
@@ -463,7 +496,8 @@ private fun MapPaneLayout(
         RightEdgeControls(
             if (pan) null else actionStrip,
             mapActionStrip,
-            Modifier.align(Alignment.TopEnd).padding(12.dp),
+            Modifier.align(if (atEnd) Alignment.TopStart else Alignment.TopEnd).padding(12.dp),
+            alignment = if (atEnd) Alignment.Start else Alignment.End,
         )
     }
 }
@@ -543,7 +577,7 @@ private fun RoutePreviewChrome(template: RoutePreviewNavigationTemplate, modifie
                 )
                 Box(Modifier.weight(1f, fill = false)) {
                     if (template.isLoading) {
-                        Text("Finding routes…", Modifier.padding(14.dp), style = ChromeType.title)
+                        Text(stringResource(R.string.nav_finding_routes), Modifier.padding(14.dp), style = ChromeType.title)
                     } else {
                         ItemListColumn(template.itemList)
                     }
@@ -567,7 +601,7 @@ private fun ListPane(
     ChromeSurface(modifier, shape = androidx.compose.foundation.shape.RoundedCornerShape(0.dp)) {
         Column {
             HeaderBar(title, startAction)
-            if (loading) Text("Loading…", Modifier.padding(14.dp), style = ChromeType.title)
+            if (loading) Text(stringResource(R.string.media_loading), Modifier.padding(14.dp), style = ChromeType.title)
             else ItemListColumn(itemList)
         }
     }

gearslip/src/main/java/app/seb3thehacker/gearslip/car/TemplateContent.kt

@@ -1,5 +1,7 @@
 package app.seb3thehacker.gearslip.car
 
+import androidx.compose.ui.res.stringResource
+import app.seb3thehacker.gearslip.R
 import app.seb3thehacker.gearslip.car.theme.*
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.material.icons.filled.Close
@@ -317,7 +319,7 @@ internal fun SearchField(
                 Spacer(Modifier.width(12.dp))
             }
             Text(
-                query.ifEmpty { hint.ifEmpty { "Search" } },
+                query.ifEmpty { hint.ifEmpty { stringResource(R.string.template_search) } },
                 style = MaterialTheme.typography.titleMedium,
                 color = if (query.isEmpty()) muted else MaterialTheme.colorScheme.onSurface,
                 maxLines = 1,
@@ -327,7 +329,7 @@ internal fun SearchField(
             if (onClear != null && query.isNotEmpty()) {
                 GsIconButton(
                     androidx.compose.material.icons.Icons.Filled.Close,
-                    "Clear",
+                    stringResource(R.string.storage_clear),
                     onClear,
                     colors = GsColors(androidx.compose.ui.graphics.Color.Transparent, muted),
                     size = 42.dp,
@@ -623,7 +625,7 @@ private fun MediaPlaybackContent(template: MediaPlaybackTemplate, modifier: Modi
         } else {
             Box(Modifier.weight(1f).fillMaxWidth(), contentAlignment = Alignment.Center) {
                 Text(
-                    "Nothing playing yet.",
+                    stringResource(R.string.template_nothing_playing),
                     style = ChromeType.body,
                     color = MaterialTheme.colorScheme.onSurfaceVariant,
                     textAlign = androidx.compose.ui.text.style.TextAlign.Center,
@@ -647,6 +649,6 @@ private typealias ColumnScopeAlias = androidx.compose.foundation.layout.ColumnSc
 @Composable
 private fun Loading() {
     Box(Modifier.fillMaxWidth().height(80.dp), contentAlignment = Alignment.Center) {
-        Text("Loading…", style = ChromeType.title)
+        Text(stringResource(R.string.media_loading), style = ChromeType.title)
     }
 }

gearslip/src/main/java/app/seb3thehacker/gearslip/car/TemplateParts.kt

@@ -1,5 +1,8 @@
 package app.seb3thehacker.gearslip.car
 
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.input.pointer.changedToUp
+import app.seb3thehacker.gearslip.R
 import app.seb3thehacker.gearslip.car.theme.*
 import androidx.compose.runtime.produceState
 import androidx.compose.runtime.remember
@@ -34,6 +37,7 @@ import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.Call
 import androidx.compose.material.icons.filled.ArrowBack
 import androidx.compose.material.icons.filled.Menu
+import androidx.compose.material.icons.filled.MoreVert
 import androidx.compose.material.icons.filled.Warning
 import androidx.compose.material3.Icon
 import androidx.compose.material3.MaterialTheme
@@ -228,6 +232,8 @@ internal fun RightEdgeControls(
     modifier: Modifier = Modifier,
     /** For the stack of map buttons alone, without the row of the app's own above it. */
     mapActionsModifier: Modifier = Modifier,
+    /** End normally; Start when the app's cards have moved to the far edge and these to the near one. */
+    alignment: Alignment.Horizontal = Alignment.End,
 ) {
     val connection = LocalCarAppConnection.current
     val actions = actionStrip?.actions.orEmpty().filter { it.isDrawable() }
@@ -244,6 +250,11 @@ internal fun RightEdgeControls(
     // Kept up while the knob is on one of them, or the ring would fade out along with the button.
     var holdsFocus by remember { mutableStateOf(false) }
     val visible = awake || pan || holdsFocus
+    // With the player beside the map there is no room for the app's row and the map controls
+    // both, so the app's own buttons fold behind one; opening it swaps them in for the map's.
+    val folded = LocalSidePanelInset.current > 0.dp && actions.size > 1
+    var open by remember { mutableStateOf(false) }
+    androidx.compose.runtime.LaunchedEffect(visible, folded) { if (!visible || !folded) open = false }
     val alpha by androidx.compose.animation.core.animateFloatAsState(
         targetValue = if (visible) 1f else RESTING_ALPHA,
         animationSpec = androidx.compose.animation.core.tween(if (visible) 150 else 500),
@@ -262,18 +273,45 @@ internal fun RightEdgeControls(
                     }
                 }
             },
-        horizontalAlignment = Alignment.End,
+        horizontalAlignment = alignment,
         verticalArrangement = Arrangement.spacedBy(8.dp),
     ) {
-        if (actions.isNotEmpty()) {
+        if (folded) {
+            val scheme = MaterialTheme.colorScheme
+            GsIconButton(
+                Icons.Filled.MoreVert,
+                stringResource(R.string.car_group_more),
+                onClick = { open = !open },
+                colors = GsColors(if (open) scheme.primary else scheme.surfaceContainerHighest, if (open) scheme.onPrimary else scheme.onSurface),
+                size = ICON_BUTTON_SIZE,
+                iconSize = ICON_BUTTON_GLYPH,
+                shape = androidx.compose.foundation.shape.CircleShape,
+            )
+            if (open) {
+                // A tap on any of them closes the stack again; the tap still reaches the button.
+                Column(
+                    Modifier.pointerInput(Unit) {
+                        awaitPointerEventScope {
+                            while (true) {
+                                if (awaitPointerEvent(PointerEventPass.Initial).changes.any { it.changedToUp() }) open = false
+                            }
+                        }
+                    },
+                    horizontalAlignment = alignment,
+                    verticalArrangement = Arrangement.spacedBy(8.dp),
+                ) {
+                    actions.forEach { ActionButton(it) }
+                }
+            }
+        } else if (actions.isNotEmpty()) {
             Row(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
                 actions.forEach { ActionButton(it) }
             }
         }
-        if (mapActions.isNotEmpty()) {
+        if (mapActions.isNotEmpty() && !(folded && open)) {
             Column(
                 mapActionsModifier,
-                horizontalAlignment = Alignment.End,
+                horizontalAlignment = alignment,
                 verticalArrangement = Arrangement.spacedBy(8.dp),
             ) {
                 mapActions.forEach { ActionButton(it) }
@@ -423,7 +461,7 @@ internal fun AutoStartButton(action: Action, modifier: Modifier = Modifier) {
             ) {
                 if (hasGlyph) CarGlyph(action.icon, Modifier.size(24.dp).align(Alignment.CenterStart))
                 Text(
-                    action.title.text().ifEmpty { "Start" },
+                    action.title.text().ifEmpty { stringResource(R.string.template_start) },
                     style = ChromeType.title,
                     maxLines = 1,
                 )

gearslip/src/main/java/app/seb3thehacker/gearslip/car/TemplateRows.kt

@@ -1,5 +1,7 @@
 package app.seb3thehacker.gearslip.car
 
+import androidx.compose.ui.res.stringResource
+import app.seb3thehacker.gearslip.R
 import app.seb3thehacker.gearslip.car.theme.*
 import androidx.compose.runtime.produceState
 import androidx.compose.runtime.remember
@@ -300,7 +302,7 @@ private fun DetailRow(row: CarRow, placeName: String) {
                 Row(Modifier.padding(horizontal = 16.dp, vertical = 10.dp), verticalAlignment = Alignment.CenterVertically) {
                     androidx.compose.material3.Icon(Icons.Filled.Call, null, Modifier.size(20.dp))
                     Spacer(Modifier.width(6.dp))
-                    Text("Call", style = ChromeType.body)
+                    Text(stringResource(R.string.dialer_call), style = ChromeType.body)
                 }
             }
         }

gearslip/src/main/java/app/seb3thehacker/gearslip/car/VehicleDataScreen.kt

@@ -1,5 +1,6 @@
 package app.seb3thehacker.gearslip.car
 
+import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
@@ -27,7 +28,7 @@ import androidx.compose.ui.unit.dp
 fun VehicleDataScreen() {
     val readings by CarSensors.readings.collectAsState()
 
-    Column(Modifier.fillMaxSize().padding(horizontal = 24.dp, vertical = 16.dp)) {
+    Column(Modifier.fillMaxSize().padding(start = 24.dp, end = 24.dp, top = 16.dp)) {
         ScreenHeader("Vehicle data")
         Text(
             "Raw sensor channel from the connected head unit. Field meaning is a best guess - " +
@@ -46,7 +47,7 @@ fun VehicleDataScreen() {
             return@Column
         }
 
-        LazyColumn(verticalArrangement = Arrangement.spacedBy(8.dp)) {
+        LazyColumn(contentPadding = PaddingValues(bottom = 16.dp), verticalArrangement = Arrangement.spacedBy(8.dp)) {
             items(readings, key = { it.typeId }) { reading -> ReadingRow(reading) }
         }
     }

gearslip/src/main/java/app/seb3thehacker/gearslip/car/Weather.kt

@@ -1,5 +1,9 @@
 package app.seb3thehacker.gearslip.car
 
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.res.stringResource
+import androidx.annotation.StringRes
+import app.seb3thehacker.gearslip.R
 import android.Manifest
 import android.content.Context
 import android.content.pm.PackageManager
@@ -38,7 +42,7 @@ class WeatherData(
 
 sealed interface WeatherState {
     data object Loading : WeatherState
-    data class Unavailable(val reason: String) : WeatherState
+    data class Unavailable(@param:StringRes val reason: Int) : WeatherState
     data class Ready(val data: WeatherData) : WeatherState
 }
 
@@ -78,7 +82,7 @@ object Weather {
             if (flow.value !is WeatherState.Ready) {
                 val allowed = hasLocationPermission(context)
                 flow.value = WeatherState.Unavailable(
-                    if (allowed) "Waiting for a location fix." else "Allow location for Gearslip on the phone to see the weather.",
+                    if (allowed) R.string.weather_waiting_fix else R.string.weather_allow_location,
                 )
             }
             return
@@ -92,7 +96,7 @@ object Weather {
             // No place name: logs get shared in bug reports.
             GearslipLog.i("weather: loaded")
         }
-        else if (flow.value !is WeatherState.Ready) flow.value = WeatherState.Unavailable("Could not reach the weather service.")
+        else if (flow.value !is WeatherState.Ready) flow.value = WeatherState.Unavailable(R.string.weather_unreachable)
     }
 
     // --- location -------------------------------------------------------------------------
@@ -197,6 +201,26 @@ object Weather {
         )
     }
 
+    /** Open-Meteo's WMO weather codes, in words on the screen. [describe] is the English the assistant says. */
+    @StringRes
+    fun conditionRes(code: Int): Int = when (code) {
+        0 -> R.string.weather_clear
+        1 -> R.string.weather_mostly_clear
+        2 -> R.string.weather_partly_cloudy
+        3 -> R.string.weather_overcast
+        45, 48 -> R.string.weather_fog
+        in 51..57 -> R.string.weather_drizzle
+        in 61..67 -> R.string.weather_rain
+        in 71..77 -> R.string.weather_snow
+        in 80..82 -> R.string.weather_rain_showers
+        in 85..86 -> R.string.weather_snow_showers
+        in 95..99 -> R.string.weather_thunderstorm
+        else -> 0
+    }
+
+    @Composable
+    fun condition(code: Int): String = conditionRes(code).let { if (it == 0) "-" else stringResource(it) }
+
     /** Open-Meteo's WMO weather codes, in words. */
     fun describe(code: Int): String = when (code) {
         0 -> "Clear"

gearslip/src/main/java/app/seb3thehacker/gearslip/car/WeatherScreen.kt

@@ -1,5 +1,7 @@
 package app.seb3thehacker.gearslip.car
 
+import androidx.compose.ui.res.stringResource
+import app.seb3thehacker.gearslip.R
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
@@ -41,11 +43,11 @@ fun WeatherScreen() {
         Modifier.fillMaxSize().verticalScroll(rememberScrollState()).padding(horizontal = 24.dp, vertical = 16.dp),
         verticalArrangement = Arrangement.spacedBy(20.dp),
     ) {
-        ScreenHeader("Weather")
+        ScreenHeader(stringResource(R.string.crumb_weather))
         when (val s = state) {
-            WeatherState.Loading -> Text("Getting the weather…", style = MaterialTheme.typography.titleMedium)
+            WeatherState.Loading -> Text(stringResource(R.string.weather_getting), style = MaterialTheme.typography.titleMedium)
             is WeatherState.Unavailable -> Text(
-                s.reason, style = MaterialTheme.typography.titleMedium,
+                stringResource(s.reason), style = MaterialTheme.typography.titleMedium,
                 color = MaterialTheme.colorScheme.onSurfaceVariant,
             )
             is WeatherState.Ready -> Forecast(s.data)
@@ -66,18 +68,18 @@ private fun Forecast(w: WeatherData) {
             WeatherIcon(w.code, w.isDay, size = 88.dp)
             Column {
                 Text("${w.temp}${w.tempUnit}", fontSize = 56.sp, fontWeight = FontWeight.Bold)
-                Text(Weather.describe(w.code), style = MaterialTheme.typography.titleLarge)
+                Text(Weather.condition(w.code), style = MaterialTheme.typography.titleLarge)
             }
             Spacer(Modifier.weight(1f))
             Column(horizontalAlignment = Alignment.End, verticalArrangement = Arrangement.spacedBy(4.dp)) {
-                Text("Feels like ${w.feelsLike}${w.tempUnit}", style = MaterialTheme.typography.bodyLarge)
-                Text("Humidity ${w.humidity}%", style = MaterialTheme.typography.bodyLarge)
-                Text("Wind ${w.wind} ${w.windUnit}", style = MaterialTheme.typography.bodyLarge)
+                Text(stringResource(R.string.weather_feels_like, "${w.feelsLike}${w.tempUnit}"), style = MaterialTheme.typography.bodyLarge)
+                Text(stringResource(R.string.weather_humidity, w.humidity), style = MaterialTheme.typography.bodyLarge)
+                Text(stringResource(R.string.weather_wind, "${w.wind} ${w.windUnit}"), style = MaterialTheme.typography.bodyLarge)
             }
         }
     }
 
-    Text("Next hours", style = MaterialTheme.typography.titleMedium, color = MaterialTheme.colorScheme.primary)
+    Text(stringResource(R.string.weather_next_hours), style = MaterialTheme.typography.titleMedium, color = MaterialTheme.colorScheme.primary)
     LazyRow(horizontalArrangement = Arrangement.spacedBy(10.dp)) {
         items(w.hours) { h ->
             Surface(color = MaterialTheme.colorScheme.surfaceContainerHigh, shape = MaterialTheme.shapes.large) {
@@ -101,7 +103,7 @@ private fun Forecast(w: WeatherData) {
         }
     }
 
-    Text("This week", style = MaterialTheme.typography.titleMedium, color = MaterialTheme.colorScheme.primary)
+    Text(stringResource(R.string.weather_this_week), style = MaterialTheme.typography.titleMedium, color = MaterialTheme.colorScheme.primary)
     Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {
         w.days.forEachIndexed { i, d ->
             Surface(color = MaterialTheme.colorScheme.surfaceContainerHigh, shape = MaterialTheme.shapes.large) {
@@ -111,11 +113,11 @@ private fun Forecast(w: WeatherData) {
                     horizontalArrangement = Arrangement.spacedBy(16.dp),
                 ) {
                     Text(
-                        if (i == 0) "Today" else SimpleDateFormat("EEEE", Locale.getDefault()).format(Date(d.date)),
+                        if (i == 0) stringResource(R.string.weather_today) else SimpleDateFormat("EEEE", Locale.getDefault()).format(Date(d.date)),
                         Modifier.width(120.dp), style = MaterialTheme.typography.bodyLarge, fontWeight = FontWeight.SemiBold,
                     )
                     WeatherIcon(d.code, true, size = 28.dp)
-                    Text(Weather.describe(d.code), Modifier.weight(1f), style = MaterialTheme.typography.bodyMedium)
+                    Text(Weather.condition(d.code), Modifier.weight(1f), style = MaterialTheme.typography.bodyMedium)
                     if (d.rainChance > 0) Text("${d.rainChance}%", color = MaterialTheme.colorScheme.primary)
                     Text("${d.low}° / ${d.high}°", style = MaterialTheme.typography.bodyLarge)
                 }
@@ -123,7 +125,7 @@ private fun Forecast(w: WeatherData) {
         }
     }
     Text(
-        "Weather data by Open-Meteo.com (CC BY 4.0)",
+        stringResource(R.string.weather_credit),
         style = MaterialTheme.typography.labelSmall, color = MaterialTheme.colorScheme.onSurfaceVariant,
     )
 }

gearslip/src/main/java/app/seb3thehacker/gearslip/car/WebApp.kt

@@ -1,5 +1,7 @@
 package app.seb3thehacker.gearslip.car
 
+import androidx.compose.ui.res.stringResource
+import app.seb3thehacker.gearslip.R
 import android.os.Handler
 import android.os.Looper
 import android.view.View
@@ -95,19 +97,19 @@ fun WebApp(content: String) {
     Column(Modifier.fillMaxSize()) {
         // Back steps through the page's history first (the interceptor above), then leaves.
         if (!fullscreen) {
-            ScreenHeader(pageTitle.ifEmpty { "Browser" }, Modifier.padding(horizontal = 16.dp, vertical = 8.dp)) {
-                GsIconButton(androidx.compose.material.icons.Icons.Filled.Search, "Search or type an address", {
+            ScreenHeader(pageTitle.ifEmpty { stringResource(R.string.app_browser) }, Modifier.padding(horizontal = 16.dp, vertical = 8.dp)) {
+                GsIconButton(androidx.compose.material.icons.Icons.Filled.Search, stringResource(R.string.web_search), {
                     fieldText = null
                     address = ""
                 })
                 if (canGoForward) {
-                    GsIconButton(androidx.compose.material.icons.Icons.AutoMirrored.Filled.ArrowForward, "Forward", { web?.goForward() })
+                    GsIconButton(androidx.compose.material.icons.Icons.AutoMirrored.Filled.ArrowForward, stringResource(R.string.web_forward), { web?.goForward() })
                 }
-                GsIconButton(androidx.compose.material.icons.Icons.Filled.Refresh, "Reload", { web?.reload() })
-                GsIconButton(androidx.compose.material.icons.Icons.Filled.Home, "Start page", {
+                GsIconButton(androidx.compose.material.icons.Icons.Filled.Refresh, stringResource(R.string.web_reload), { web?.reload() })
+                GsIconButton(androidx.compose.material.icons.Icons.Filled.Home, stringResource(R.string.web_start_page), {
                     web?.let { view -> loadContent(view, content) }
                 })
-                GsIconButton(MediaIcons.Fullscreen, "Full screen", CarFullscreen::enter)
+                GsIconButton(MediaIcons.Fullscreen, stringResource(R.string.web_fullscreen), CarFullscreen::enter)
             }
         }
         Box(Modifier.weight(1f).fillMaxSize()) {

gearslip/src/main/java/app/seb3thehacker/gearslip/car/theme/CarColors.kt

@@ -3,6 +3,7 @@ package app.seb3thehacker.gearslip.car.theme
 import androidx.compose.material3.ColorScheme
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.graphics.compositeOver
+import androidx.compose.ui.graphics.lerp
 
 /**
  * The phone's Material You colours, with its accent washed over the surfaces. Material You's own
@@ -11,7 +12,8 @@ import androidx.compose.ui.graphics.compositeOver
  * Material 3's surface tint does, and it changes with the wallpaper like everything else.
  * Higher containers take more of the tint, so cards still stand off the background.
  */
-fun ColorScheme.withTintedSurfaces(dark: Boolean): ColorScheme {
+fun ColorScheme.withTintedSurfaces(dark: Boolean, style: DarkStyle = DarkStyle.GREY): ColorScheme {
+    if (dark && style != DarkStyle.GREY) return withDarkStyle(style)
     val base = if (dark) 0.03f else 0.02f
     fun tint(own: Color, step: Int) = primary.copy(alpha = base + step * (if (dark) 0.015f else 0.01f)).compositeOver(own)
     return copy(
@@ -27,3 +29,56 @@ fun ColorScheme.withTintedSurfaces(dark: Boolean): ColorScheme {
         surfaceVariant = tint(surfaceVariant, 3),
     )
 }
+
+/**
+ * How dark the car's dark mode goes. [GREY] is Material You's own dark, with the tint above;
+ * the others are darker, and the two colour ones take their hue from the phone's accent.
+ */
+enum class DarkStyle { GREY, BLACK, DEEP_COLOUR, BLACK_COLOUR }
+
+/**
+ * The surfaces rebuilt at [style]'s brightness, from the background up to the highest container.
+ * The levels are 0-255 greys; each surface keeps Material You's own slight hue at that level.
+ */
+private fun ColorScheme.withDarkStyle(style: DarkStyle): ColorScheme {
+    val levels = when (style) {
+        DarkStyle.BLACK -> listOf(0f, 12f, 17f, 25f, 34f)
+        DarkStyle.DEEP_COLOUR -> listOf(11f, 19f, 24f, 32f, 41f)
+        else -> listOf(0f, 17f, 22f, 30f, 39f)
+    }
+    val colour = style != DarkStyle.BLACK
+    // The accent's saturated container colour, not the pastel accent itself: tinting with the
+    // pastel only makes a surface lighter, where this one gives it colour at the same brightness.
+    fun at(own: Color, step: Int): Color {
+        val level = levels[step] / 255f
+        if (level == 0f) return Color.Black
+        val neutral = own.scaledTo(level)
+        return if (colour) {
+            lerp(neutral, primaryContainer.scaledTo(level), (0.6f + 0.08f * step).coerceAtMost(0.95f))
+        } else {
+            primary.copy(alpha = 0.02f + 0.015f * step).compositeOver(neutral)
+        }
+    }
+    return copy(
+        // Grey text that read fine on grey looks dim on black, so it moves a little towards white.
+        onSurfaceVariant = lerp(onSurfaceVariant, onSurface, 0.3f),
+        background = at(background, 0),
+        surface = at(surface, 0),
+        surfaceDim = at(surfaceDim, 0),
+        surfaceContainerLowest = at(surfaceContainerLowest, 0),
+        surfaceContainerLow = at(surfaceContainerLow, 1),
+        surfaceContainer = at(surfaceContainer, 2),
+        surfaceContainerHigh = at(surfaceContainerHigh, 3),
+        surfaceContainerHighest = at(surfaceContainerHighest, 4),
+        surfaceBright = at(surfaceBright, 4),
+        surfaceVariant = at(surfaceVariant, 3),
+    )
+}
+
+/** This colour's hue at an average brightness of [level], 0 to 1. */
+private fun Color.scaledTo(level: Float): Color {
+    val mean = (red + green + blue) / 3f
+    if (mean <= 0f) return Color(level, level, level)
+    val k = level / mean
+    return Color((red * k).coerceAtMost(1f), (green * k).coerceAtMost(1f), (blue * k).coerceAtMost(1f))
+}

gearslip/src/main/java/app/seb3thehacker/gearslip/car/theme/GsControls.kt

@@ -9,6 +9,7 @@ import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.draw.drawBehind
+import androidx.compose.ui.draw.dropShadow
 import androidx.compose.ui.geometry.Size
 import androidx.compose.ui.graphics.drawOutline
 import androidx.compose.ui.graphics.drawscope.DrawScope
@@ -172,6 +173,46 @@ fun Modifier.gsSurface(
  * outlines: cheap, works on every API level, and already soft enough that the car's video
  * compression has nothing crisp to smear.
  */
+/**
+ * The current theme's shadow under a panel floating over the map, such as the docked player.
+ * Draws nothing in a look without one.
+ */
+@Composable
+fun Modifier.gsPanelShadow(shape: Shape): Modifier {
+    val look = gsLook()
+    if (look.panelShadow <= 0.dp || look.panelShadowAlpha <= 0f) return this
+    // A real blur, as soft as the nav bar's gradient and as strong: stacked outlines showed as
+    // rings around a card this big.
+    return dropShadow(
+        shape,
+        androidx.compose.ui.graphics.shadow.Shadow(
+            radius = look.panelShadow * 3,
+            color = Color.Black.copy(alpha = look.panelShadowAlpha * 0.6f),
+            offset = androidx.compose.ui.unit.DpOffset(0.dp, look.panelShadow / 2),
+        ),
+    )
+}
+
+/** The same shadow cast upwards from the top edge of a bar along the bottom of the screen. */
+@Composable
+fun Modifier.gsBarShadow(): Modifier {
+    val look = gsLook()
+    if (look.panelShadow <= 0.dp || look.panelShadowAlpha <= 0f) return this
+    return drawBehind {
+        val reach = look.panelShadow.toPx() * 1.5f
+        drawRect(
+            Brush.verticalGradient(
+                0f to Color.Transparent,
+                1f to Color.Black.copy(alpha = look.panelShadowAlpha * 0.6f),
+                startY = -reach,
+                endY = 0f,
+            ),
+            topLeft = androidx.compose.ui.geometry.Offset(0f, -reach),
+            size = Size(size.width, reach),
+        )
+    }
+}
+
 private fun DrawScope.drawSoftShadow(shape: Shape, elevation: Float, alpha: Float, lift: Float) {
     if (alpha <= 0f) return
     val blur = elevation * 2f

gearslip/src/main/java/app/seb3thehacker/gearslip/car/theme/GsTheme.kt

@@ -64,6 +64,12 @@ data class ControlLook(
      * from; a flat look takes the dot.
      */
     val holdMarker: HoldMarkerStyle = HoldMarkerStyle.PEEL,
+    /**
+     * The shadow a panel floating over the map casts onto it (the docked player, the lyrics), and
+     * the nav bar casts up. 0 for none, so a flat look stays flat.
+     */
+    val panelShadow: Dp = 0.dp,
+    val panelShadowAlpha: Float = 0f,
     /** Replaces this look when the UI is light, for effects that only work on one background. */
     val light: ControlLook? = null,
 )
@@ -72,7 +78,11 @@ object GsThemes {
     val Keycap = GsTheme(
         id = "keycap",
         name = "Keycap",
-        control = ControlLook(lip = 4.dp, pressedScale = 1f, holdMarker = HoldMarkerStyle.PEEL),
+        // Short and dark, like the keys' own solid base.
+        control = ControlLook(
+            lip = 4.dp, pressedScale = 1f, holdMarker = HoldMarkerStyle.PEEL,
+            panelShadow = 4.dp, panelShadowAlpha = 0.45f,
+        ),
     )
 
     val Tactile = GsTheme(
@@ -89,6 +99,8 @@ object GsThemes {
             pressedDim = 0.12f,
             pressedScale = 1f,
             holdMarker = HoldMarkerStyle.PEEL,
+            panelShadow = 12.dp,
+            panelShadowAlpha = 0.42f,
             // A wide soft shadow bands once the car's video stream compresses it on a light
             // background, so light mode gets a tight one and leans on the bevel instead.
             light = ControlLook(
@@ -102,6 +114,8 @@ object GsThemes {
                 pressedDim = 0.12f,
                 pressedScale = 1f,
                 holdMarker = HoldMarkerStyle.PEEL,
+                panelShadow = 4.dp,
+                panelShadowAlpha = 0.22f,
             ),
         ),
     )

gearslip/src/main/java/app/seb3thehacker/gearslip/host/CarAppConnection.kt

@@ -227,6 +227,7 @@ class CarAppConnection(private val context: Context) {
 
     private fun disconnect(keepLocation: Boolean) {
         main.removeCallbacks(handshakeTimeout)
+        hardware.stop()
         clearToasts()
         lent?.let { sendSurfaceDestroyed(it) }
         lent = null
@@ -599,6 +600,7 @@ class CarAppConnection(private val context: Context) {
     fun reportAreas(visible: Rect, stable: Rect) {
         areas = visible to stable
         val callback = surfaceCallback ?: return
+        GearslipLog.i("host: areas for $appPackage: visible=${visible.toShortString()} stable=${stable.toShortString()}")
         runCatching { callback.onStableAreaChanged(stable, noop("onStableAreaChanged")) }
         runCatching { callback.onVisibleAreaChanged(visible, noop("onVisibleAreaChanged")) }
     }
@@ -657,8 +659,16 @@ class CarAppConnection(private val context: Context) {
         }
 
         override fun sendLocation(location: Location?) = Unit
-        override fun showAlert(alert: Bundleable?) = Unit
-        override fun dismissAlert(alertId: Int) = Unit
+        override fun showAlert(alert: Bundleable?) {
+            val shown = runCatching { alert?.get() as? androidx.car.app.model.Alert }
+                .onFailure { GearslipLog.w("host: couldn't read an alert: ${it.message}") }
+                .getOrNull() ?: return
+            main.post { if (toastOwner === owner) app.seb3thehacker.gearslip.car.CarAlerts.show(owner, shown) }
+        }
+
+        override fun dismissAlert(alertId: Int) {
+            main.post { app.seb3thehacker.gearslip.car.CarAlerts.dismiss(owner, alertId) }
+        }
         override fun openMicrophone(request: Bundleable?): Bundleable? = null
     }
 
@@ -684,38 +694,25 @@ class CarAppConnection(private val context: Context) {
     }
 
     /**
-     * Answers car-hardware questions with "this car doesn't have that".
+     * Answers car-hardware questions from what the car itself sends: see [CarHardwareFeed].
      *
-     * A phone knows nothing about a car's sensors, so every answer here is "unsupported" - but
-     * it has to be an actual answer. Returning no binder for this service at all is what made
-     * Organic Maps crash in onAppStart: its CarSensorsManager assumes a host that offers the
-     * service, and the library's own "unsupported" path only runs once a reply arrives.
-     *
-     * The reply's Bundleable is ignored by the library whenever isSupported is false, but the
-     * IBinder must be a real IOnDoneCallback - the app dispatches the reply through it.
+     * Every question has to get an actual answer, even "unsupported". Returning no binder for
+     * this service at all is what made Organic Maps crash in onAppStart: its CarSensorsManager
+     * assumes a host that offers the service, and the library's own "unsupported" path only runs
+     * once a reply arrives. The reply's IBinder must be a real IOnDoneCallback: the app
+     * dispatches the reply through it.
      */
+    private val hardware = CarHardwareFeed { name -> noop(name).asBinder() }
+
     private val hardwareHost = object : ICarHardwareHost.Stub() {
         override fun getInterfaceVersion(): Int = ICarHardwareHost.VERSION
-        override fun getCarHardwareResult(
-            type: Int,
-            params: Bundleable?,
-            result: ICarHardwareResult?,
-        ) = unsupported(type, result)
+        override fun getCarHardwareResult(type: Int, params: Bundleable?, result: ICarHardwareResult?) =
+            hardware.get(type, result)
 
-        override fun subscribeCarHardwareResult(
-            type: Int,
-            params: Bundleable?,
-            result: ICarHardwareResult?,
-        ) = unsupported(type, result)
+        override fun subscribeCarHardwareResult(type: Int, params: Bundleable?, result: ICarHardwareResult?) =
+            hardware.subscribe(type, result)
 
-        override fun unsubscribeCarHardwareResult(type: Int, params: Bundleable?) = Unit
-
-        private fun unsupported(type: Int, result: ICarHardwareResult?) {
-            val target = result ?: return
-            runCatching {
-                target.onCarHardwareResult(type, false, null, noop("carHardwareResult").asBinder())
-            }.onFailure { GearslipLog.w("host: could not answer hardware result $type") }
-        }
+        override fun unsubscribeCarHardwareResult(type: Int, params: Bundleable?) = hardware.unsubscribe(type)
     }
 
     /**
@@ -850,6 +847,7 @@ class CarAppConnection(private val context: Context) {
 
     private fun clearToasts() {
         CarToasts.clear(toastOwner)
+        app.seb3thehacker.gearslip.car.CarAlerts.clear(toastOwner)
         toastOwner = Any()
     }
 

gearslip/src/main/java/app/seb3thehacker/gearslip/host/CarHardwareFeed.kt

@@ -0,0 +1,171 @@
+package app.seb3thehacker.gearslip.host
+
+import android.os.IBinder
+import androidx.car.app.hardware.ICarHardwareResult
+import androidx.car.app.hardware.common.CarUnit
+import androidx.car.app.hardware.common.CarValue
+import androidx.car.app.hardware.info.CarHardwareLocation
+import androidx.car.app.hardware.info.Compass
+import androidx.car.app.hardware.info.EnergyLevel
+import androidx.car.app.hardware.info.Mileage
+import androidx.car.app.hardware.info.Model
+import androidx.car.app.hardware.info.Speed
+import androidx.car.app.serialization.Bundleable
+import app.seb3thehacker.gearslip.GearslipLog
+import app.seb3thehacker.gearslip.car.CarData
+import app.seb3thehacker.gearslip.car.CarSettings
+import java.util.concurrent.ConcurrentHashMap
+import java.util.concurrent.CopyOnWriteArrayList
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.SupervisorJob
+import kotlinx.coroutines.cancel
+import kotlinx.coroutines.launch
+
+/**
+ * What a car app gets when it asks the car hardware API (CarInfo, CarSensors) about the car:
+ * the model, speed, odometer, fuel and range, compass and the car's own GPS, read from [CarData].
+ * Anything else, or anything the car never sends, is answered "this car doesn't have that".
+ *
+ * A one-off question ([get]) is answered at once. A subscription gets the current value, if
+ * there is one, and then each new one as the car sends it, until the app unsubscribes or the
+ * connection ends ([stop]).
+ */
+internal class CarHardwareFeed(private val callback: (name: String) -> IBinder) {
+
+    private val subscribers = ConcurrentHashMap<Int, CopyOnWriteArrayList<ICarHardwareResult>>()
+    private val scope = CoroutineScope(SupervisorJob() + Dispatchers.Default)
+    @Volatile private var watching: Job? = null
+
+    fun get(type: Int, result: ICarHardwareResult?) {
+        val target = result ?: return
+        send(target, type, valueOf(type, CarData.state.value) ?: return unsupported(target, type))
+    }
+
+    fun subscribe(type: Int, result: ICarHardwareResult?) {
+        val target = result ?: return
+        if (type !in SENSOR_OF) return unsupported(target, type)
+        subscribers.getOrPut(type) { CopyOnWriteArrayList() }.add(target)
+        GearslipLog.i("host: an app subscribed to car hardware ${NAMES[type] ?: type}")
+        valueOf(type, CarData.state.value)?.let { send(target, type, it) }
+        watch()
+    }
+
+    fun unsubscribe(type: Int) {
+        subscribers.remove(type)
+    }
+
+    fun stop() {
+        subscribers.clear()
+        watching?.cancel()
+        watching = null
+    }
+
+    fun close() {
+        stop()
+        scope.cancel()
+    }
+
+    /** Sends each subscribed kind again when the car's reading of it changes. */
+    private fun watch() {
+        if (watching?.isActive == true) return
+        watching = scope.launch {
+            var seen = CarData.state.value.updatedAt
+            CarData.state.collect { s ->
+                for ((type, targets) in subscribers) {
+                    val sensor = SENSOR_OF[type] ?: continue
+                    if (s.updatedAt[sensor] == seen[sensor]) continue
+                    val value = valueOf(type, s) ?: continue
+                    targets.forEach { send(it, type, value) }
+                }
+                seen = s.updatedAt
+            }
+        }
+    }
+
+    private fun valueOf(type: Int, s: CarData.Snapshot): Any? {
+        val imperial = CarSettings.imperial()
+        val distanceUnit = known(if (imperial) CarUnit.MILE else CarUnit.KILOMETER)
+        val at = s.updatedAt[SENSOR_OF[type]] ?: System.currentTimeMillis()
+        fun <T : Any> v(value: T) = CarValue(value, at, CarValue.STATUS_SUCCESS)
+        return when (type) {
+            TYPE_MODEL -> CarData.model?.let { m ->
+                Model.Builder().setName(v(m.name)).apply { m.year?.let { setYear(v(it)) } }.build()
+            }
+            TYPE_SPEED -> s.speedMps?.let {
+                Speed.Builder()
+                    .setRawSpeedMetersPerSecond(v(it))
+                    .setDisplaySpeedMetersPerSecond(v(it))
+                    .setSpeedDisplayUnit(known(if (imperial) CarUnit.MILES_PER_HOUR else CarUnit.KILOMETERS_PER_HOUR))
+                    .build()
+            }
+            TYPE_MILEAGE -> s.odometerKm?.let {
+                Mileage.Builder().setOdometerMeters(v(it * 1000f)).setDistanceDisplayUnit(distanceUnit).build()
+            }
+            TYPE_ENERGY_LEVEL -> if (s.fuelPercent == null && s.rangeKm == null && s.fuelLow == null) null else {
+                EnergyLevel.Builder().apply {
+                    s.fuelPercent?.let { setFuelPercent(v(it.toFloat())) }
+                    s.rangeKm?.let { setRangeRemainingMeters(v(it * 1000f)) }
+                    s.fuelLow?.let { setEnergyIsLow(v(it)) }
+                    setDistanceDisplayUnit(distanceUnit)
+                }.build()
+            }
+            TYPE_COMPASS -> s.compassDegrees?.let { Compass(v(listOf(it))) }
+            TYPE_CAR_LOCATION -> s.location?.let { l ->
+                val location = android.location.Location("car").apply {
+                    latitude = l.latitude
+                    longitude = l.longitude
+                    l.accuracyMeters?.let { accuracy = it }
+                    l.altitudeMeters?.let { altitude = it }
+                    l.speedMps?.let { speed = it }
+                    l.bearingDegrees?.let { bearing = it }
+                    time = at
+                }
+                CarHardwareLocation(v(location))
+            }
+            else -> null
+        }
+    }
+
+    private fun known(value: Int) = CarValue(value, System.currentTimeMillis(), CarValue.STATUS_SUCCESS)
+
+    private fun send(target: ICarHardwareResult, type: Int, value: Any) {
+        runCatching {
+            target.onCarHardwareResult(type, true, Bundleable.create(value), callback("carHardwareResult"))
+        }.onFailure {
+            // The app went away: stop telling it.
+            subscribers.values.forEach { list -> list.remove(target) }
+            GearslipLog.w("host: could not send car hardware ${NAMES[type] ?: type}: ${it.javaClass.simpleName}")
+        }
+    }
+
+    private fun unsupported(target: ICarHardwareResult, type: Int) {
+        runCatching { target.onCarHardwareResult(type, false, null, callback("carHardwareResult")) }
+            .onFailure { GearslipLog.w("host: could not answer hardware result $type") }
+    }
+
+    companion object {
+        // ICarHardwareResultTypes in the car library.
+        private const val TYPE_MODEL = 1
+        private const val TYPE_ENERGY_LEVEL = 4
+        private const val TYPE_SPEED = 5
+        private const val TYPE_MILEAGE = 6
+        private const val TYPE_COMPASS = 21
+        private const val TYPE_CAR_LOCATION = 23
+
+        /** Which of the car's sensors each kind comes from, for knowing when it changed. */
+        private val SENSOR_OF = mapOf(
+            TYPE_ENERGY_LEVEL to CarData.FUEL,
+            TYPE_SPEED to CarData.SPEED,
+            TYPE_MILEAGE to CarData.ODOMETER,
+            TYPE_COMPASS to CarData.COMPASS,
+            TYPE_CAR_LOCATION to CarData.LOCATION,
+        )
+
+        private val NAMES = mapOf(
+            TYPE_MODEL to "model", TYPE_ENERGY_LEVEL to "energy level", TYPE_SPEED to "speed",
+            TYPE_MILEAGE to "mileage", TYPE_COMPASS to "compass", TYPE_CAR_LOCATION to "car location",
+        )
+    }
+}

gearslip/src/main/java/app/seb3thehacker/gearslip/host/CarModels.kt

@@ -306,6 +306,20 @@ fun OnContentRefreshDelegate?.refresh() {
         .onFailure { GearslipLog.w("host: could not request a refresh: ${it.message}") }
 }
 
+/** An alert left the screen without the app taking it down: timed out, or closed by the driver. */
+fun androidx.car.app.model.AlertCallbackDelegate?.cancel(reason: Int) {
+    val delegate = this ?: return
+    runCatching { delegate.sendCancel(reason, doneCallback("an alert cancel")) }
+        .onFailure { GearslipLog.w("host: could not cancel an alert: ${it.message}") }
+}
+
+/** An alert left the screen another way: a newer one replaced it, the app took it down, or a tap. */
+fun androidx.car.app.model.AlertCallbackDelegate?.dismissed() {
+    val delegate = this ?: return
+    runCatching { delegate.sendDismiss(doneCallback("an alert dismiss")) }
+        .onFailure { GearslipLog.w("host: could not dismiss an alert: ${it.message}") }
+}
+
 private fun doneCallback(label: String) = object : OnDoneCallback {
     // onSuccess is annotated nullable and onFailure isn't - the asymmetry is real.
     override fun onSuccess(response: Bundleable?) = Unit

gearslip/src/main/java/app/seb3thehacker/gearslip/media/CarMedia.kt

@@ -1,5 +1,6 @@
 package app.seb3thehacker.gearslip.media
 
+import app.seb3thehacker.gearslip.R
 import android.content.ComponentName
 import android.content.Context
 import android.content.Intent
@@ -37,17 +38,33 @@ class MediaEntry(
     val iconBitmap: Bitmap?,
     val browsable: Boolean,
     val playable: Boolean,
+    /** Shown as a cover in a grid rather than a row, as the app asked. */
+    val grid: Boolean = false,
+    /** The heading the app files this under, when it splits a list into sections. */
+    val group: String? = null,
 )
 
-/** [icon] is a drawable id inside the media app's own package, not Gearslip's; 0 for none. */
-class CustomAction(val id: String, val name: String, val extras: Bundle?, val icon: Int = 0, val iconName: String = "") {
+/**
+ * [icon] is a drawable id inside the media app's own package, not Gearslip's; 0 for none.
+ * [hasOutline] says the app also has an outline of the same icon (ic_heart beside ic_heart_outline).
+ */
+class CustomAction(
+    val id: String,
+    val name: String,
+    val extras: Bundle?,
+    val icon: Int = 0,
+    val iconName: String = "",
+    val hasOutline: Boolean = false,
+) {
     /**
      * Whether a toggle like heart or shuffle is on, read from the icon's name - Tidal swaps
      * ic_favorite for ic_favorite_filled and ic_shuffle for ic_shuffle_active, and keeps the
      * button's name the same. Whole words only, so "inactive" doesn't count as "active".
+     * Metrolist swaps ic_heart_outline for a plain ic_heart, so a plain icon that has an outline
+     * twin counts as on too.
      */
     val on: Boolean
-        get() = iconName.lowercase().split('_', '.', '-').any { it in ON_WORDS }
+        get() = hasOutline || iconName.lowercase().split('_', '.', '-').any { it in ON_WORDS }
 
     private companion object {
         val ON_WORDS = setOf("filled", "fill", "active", "on", "selected", "checked", "enabled", "solid", "one", "all")
@@ -113,8 +130,8 @@ class NowPlaying(
      * only says which way it goes next by its name ("Remove from Liked Songs"), so that's read.
      */
     val liked: Boolean?
-        get() = heart ?: likeAction?.name?.let { name ->
-            listOf("remove", "unlike", "unfav", "unheart").any { name.contains(it, ignoreCase = true) }
+        get() = heart ?: likeAction?.let { action ->
+            action.on || listOf("remove", "unlike", "unfav", "unheart").any { action.name.contains(it, ignoreCase = true) }
         }
 
     val playing get() = state == PlaybackState.STATE_PLAYING || state == PlaybackState.STATE_BUFFERING
@@ -271,7 +288,10 @@ class CarMedia(private val context: Context) {
                 GearslipLog.w("media: ${app.label} went away")
                 _phase.value = Phase.REJECTED
             }
-        }, null)
+        }, Bundle().apply {
+            // Tells the app it may ask for grids and section headings, as it would of Android Auto.
+            putBoolean(STYLE_SUPPORTED, true)
+        })
         browser = mb
         GearslipLog.i("media: connecting to ${app.label}'s library")
         runCatching { mb.connect() }.onFailure {
@@ -342,6 +362,8 @@ class CarMedia(private val context: Context) {
         GearslipLog.i("media: connected to ${app.label}, root=${mb.root}")
         attach(MediaController(context, mb.sessionToken))
         rootId = mb.root
+        childStyles.clear()
+        mb.extras?.let { childStyles[mb.root] = it.getInt(STYLE_BROWSABLE, 0) to it.getInt(STYLE_PLAYABLE, 0) }
         path.clear()
         _phase.value = Phase.READY
         open(mb.root)
@@ -382,7 +404,10 @@ class CarMedia(private val context: Context) {
             speed = state?.playbackSpeed ?: 1f,
             updatedAt = state?.lastPositionUpdateTime ?: 0,
             actions = state?.actions ?: 0,
-            custom = state?.customActions.orEmpty().map { CustomAction(it.action, it.name.toString(), it.extras, it.icon, iconName(it.icon)) },
+            custom = withNextChapter(state?.customActions.orEmpty().map {
+                val iconName = iconName(it.icon)
+                CustomAction(it.action, it.name.toString(), it.extras, it.icon, iconName, hasOutline(it.icon, iconName))
+            }),
             error = state?.errorMessage?.toString(),
             activeQueueItemId = state?.activeQueueItemId ?: MediaSession.QueueItem.UNKNOWN_ID.toLong(),
             heart = if (controller?.ratingType == Rating.RATING_HEART) {
@@ -395,16 +420,48 @@ class CarMedia(private val context: Context) {
 
     private var appResources: Pair<String, android.content.res.Resources?>? = null
 
+    /**
+     * AntennaPod takes a Next chapter command whenever it's playing, but offers the button only
+     * when the driver turns it on in its notification settings. Gearslip offers it either way,
+     * with AntennaPod's own icon; on an episode without chapters it does nothing.
+     */
+    private fun withNextChapter(actions: List<CustomAction>): List<CustomAction> {
+        if (controller?.packageName != ANTENNAPOD) return actions
+        if (actions.any { it.id in ANTENNAPOD_NEXT_CHAPTER }) return actions
+        val icon = resourcesOf(ANTENNAPOD)?.getIdentifier("ic_notification_next_chapter", "drawable", ANTENNAPOD) ?: 0
+        val nextChapter = CustomAction(ANTENNAPOD_NEXT_CHAPTER.first(), context.getString(R.string.player_next_chapter), null, icon)
+        // The player shows only the first two of an app's own buttons, and AntennaPod's are
+        // Rewind and Fast-forward: second place keeps Rewind beside it.
+        return actions.toMutableList().apply { add(minOf(1, size), nextChapter) }
+    }
+
+    private fun resourcesOf(pkg: String): android.content.res.Resources? {
+        if (appResources?.first != pkg) {
+            appResources = pkg to runCatching { context.packageManager.getResourcesForApplication(pkg) }.getOrNull()
+            outlines.clear()
+        }
+        return appResources?.second
+    }
+
     /** The icon's resource name in the app's package, or "" when it can't be read. */
     private fun iconName(icon: Int): String {
         val pkg = controller?.packageName ?: return ""
-        if (appResources?.first != pkg) {
-            appResources = pkg to runCatching { context.packageManager.getResourcesForApplication(pkg) }.getOrNull()
-        }
-        val res = appResources?.second ?: return ""
+        val res = resourcesOf(pkg) ?: return ""
         return runCatching { res.getResourceEntryName(icon) }.getOrDefault("")
     }
 
+    /** Whether each icon has an outline twin, by icon id: looked up once, since state changes often. */
+    private val outlines = HashMap<Int, Boolean>()
+
+    private fun hasOutline(icon: Int, name: String): Boolean {
+        val pkg = controller?.packageName ?: return false
+        val res = resourcesOf(pkg) ?: return false
+        if (name.isEmpty() || OUTLINE_WORDS.any { name.contains(it, ignoreCase = true) }) return false
+        return outlines.getOrPut(icon) {
+            OUTLINE_WORDS.any { res.getIdentifier("${name}_$it", "drawable", pkg) != 0 }
+        }
+    }
+
     private var loggedButtons: String? = null
 
     /** The app's own buttons, by id, name and icon, each time they change. */
@@ -427,7 +484,7 @@ class CarMedia(private val context: Context) {
                 if (parentId != subscribed) return
                 _browse.value = BrowseState(
                     trail = path.map { it.second },
-                    entries = children.map(::entryOf),
+                    entries = children.map { entryOf(it, childStyles[parentId]) },
                     loading = false,
                     // An empty top level is an app keeping its library to itself, not an empty one.
                     unavailable = path.isEmpty() && children.isEmpty(),
@@ -441,8 +498,21 @@ class CarMedia(private val context: Context) {
         })
     }
 
-    private fun entryOf(item: MediaBrowser.MediaItem): MediaEntry {
+    /**
+     * How a folder asked for its children to be shown, browsable ones and playable ones: by
+     * folder id, read off the folder itself (or the root's extras) before it's opened.
+     */
+    private val childStyles = HashMap<String, Pair<Int, Int>>()
+
+    private fun entryOf(item: MediaBrowser.MediaItem, parentStyle: Pair<Int, Int>?): MediaEntry {
         val d = item.description
+        val extras = d.extras
+        if (extras != null && item.isBrowsable) {
+            childStyles[item.mediaId.orEmpty()] = extras.getInt(STYLE_BROWSABLE, 0) to extras.getInt(STYLE_PLAYABLE, 0)
+        }
+        // The item's own hint first, then what its folder asked for its kind of child.
+        val style = extras?.getInt(STYLE_SINGLE_ITEM, 0)?.takeIf { it != 0 }
+            ?: (if (item.isBrowsable) parentStyle?.first else parentStyle?.second) ?: 0
         return MediaEntry(
             id = item.mediaId.orEmpty(),
             title = d.title?.toString().orEmpty(),
@@ -451,6 +521,8 @@ class CarMedia(private val context: Context) {
             iconBitmap = d.iconBitmap,
             browsable = item.isBrowsable,
             playable = item.isPlayable,
+            grid = style == STYLE_GRID || style == STYLE_CATEGORY_GRID,
+            group = extras?.getString(STYLE_GROUP_TITLE)?.takeIf { it.isNotBlank() },
         )
     }
 
@@ -491,7 +563,15 @@ class CarMedia(private val context: Context) {
     fun next() = controller?.transportControls?.skipToNext()
     fun previous() = controller?.transportControls?.skipToPrevious()
     fun seek(ms: Long) = controller?.transportControls?.seekTo(ms)
-    fun custom(action: CustomAction) = controller?.transportControls?.sendCustomAction(action.id, action.extras)
+    fun custom(action: CustomAction) {
+        val controls = controller?.transportControls ?: return
+        // AntennaPod's media3 service and its older one each know only their own name for it.
+        if (controller?.packageName == ANTENNAPOD && action.id in ANTENNAPOD_NEXT_CHAPTER) {
+            ANTENNAPOD_NEXT_CHAPTER.forEach { controls.sendCustomAction(it, null) }
+        } else {
+            controls.sendCustomAction(action.id, action.extras)
+        }
+    }
     fun playQueueItem(track: QueueTrack) = controller?.transportControls?.skipToQueueItem(track.queueId)
 
     /**
@@ -770,5 +850,20 @@ class CarMedia(private val context: Context) {
         /** How long an app gets to start playing a search before Gearslip says it didn't. */
         const val SEARCH_WAIT_MS = 6_000L
         const val SEARCH_NOTICE_MS = 6_000L
+        /** How apps name the empty version of an icon. */
+        val OUTLINE_WORDS = listOf("outline", "outlined", "border", "empty")
     }
 }
+
+/** Android Auto's browse layout hints, which any app built for it already sends. */
+private const val ANTENNAPOD = "de.danoeh.antennapod"
+/** The media3 service's name first: that's the one offered as the button's own. */
+private val ANTENNAPOD_NEXT_CHAPTER = listOf("next_chapter", "action.de.danoeh.antennapod.core.service.next_chapter")
+
+private const val STYLE_SUPPORTED = "android.media.browse.CONTENT_STYLE_SUPPORTED"
+private const val STYLE_BROWSABLE = "android.media.browse.CONTENT_STYLE_BROWSABLE_HINT"
+private const val STYLE_PLAYABLE = "android.media.browse.CONTENT_STYLE_PLAYABLE_HINT"
+private const val STYLE_SINGLE_ITEM = "android.media.browse.CONTENT_STYLE_SINGLE_ITEM_HINT"
+private const val STYLE_GROUP_TITLE = "android.media.browse.CONTENT_STYLE_GROUP_TITLE_HINT"
+private const val STYLE_GRID = 2
+private const val STYLE_CATEGORY_GRID = 4

gearslip/src/main/java/app/seb3thehacker/gearslip/media/CarMediaStatus.kt

@@ -85,7 +85,9 @@ class CarMediaStatus(
     }
 
     private fun sendTrack(now: NowPlaying) {
-        val key = "${now.title}\u0000${now.artist}\u0000${now.album}\u0000${now.durationMs}\u0000${now.art?.generationId}"
+        // Whether there's a cover, not which bitmap: some apps (Metrolist) hand over a fresh copy
+        // of the same cover with every update, and resending it each second wastes the link.
+        val key = "${now.title}\u0000${now.artist}\u0000${now.album}\u0000${now.durationMs}\u0000${now.art != null}"
         if (key == sentTrack) return
         sentTrack = key
         var body = Protobuf.stringField(1, now.title) +

gearslip/src/main/java/app/seb3thehacker/gearslip/media/Lyrics.kt

@@ -1,28 +1,55 @@
 package app.seb3thehacker.gearslip.media
 
 import android.content.Context
+import android.util.Base64
+import android.util.Xml
 import app.seb3thehacker.gearslip.GearslipLog
+import app.seb3thehacker.gearslip.car.CarSettings
+import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.async
 import kotlinx.coroutines.withContext
+import kotlinx.coroutines.withTimeoutOrNull
 import org.json.JSONArray
 import org.json.JSONObject
+import org.xmlpull.v1.XmlPullParser
 import java.io.File
+import java.io.StringReader
 import java.net.HttpURLConnection
 import java.net.URL
 import java.net.URLEncoder
 import java.security.MessageDigest
-
-class LyricLine(val timeMs: Long, val text: String)
-
-/** [synced] means every line carries a time, so the current one can be followed along. */
-class LyricsResult(val lines: List<LyricLine>, val synced: Boolean)
+import kotlin.math.abs
 
 /**
- * Looks lyrics up on LRCLIB (lrclib.net), a free community database that needs no key.
+ * One line. [words] is filled only for word-timed lyrics, and joined back together it reads as
+ * [text]; each word carries the space after it, if any, so a word split into syllables stays whole.
+ */
+class LyricLine(val timeMs: Long, val text: String, val words: List<LyricWord> = emptyList())
+
+/** A word, or a syllable of one, sung from [startMs] to [endMs]. */
+class LyricWord(val startMs: Long, val endMs: Long, val text: String)
+
+/**
+ * [synced] means every line carries a time, so the current one can be followed along. [source]
+ * names the service that had them, shown on debug builds.
+ */
+class LyricsResult(val lines: List<LyricLine>, val synced: Boolean, val source: String = "")
+
+/**
+ * Looks lyrics up online, in the order Metrolist uses: BetterLyrics, then LRCLIB, then KuGou.
+ * Metrolist's other sources match songs by YouTube video id, which a song from another app
+ * doesn't have, and Paxsenix calls Apple Music with a borrowed token, so they're left out.
  *
- * Media apps almost never publish lyrics in their session metadata, so this is the only general
- * source. It sends the track's title, artist, album and length to lrclib.net, which is why the
- * lookup happens only when the driver opens the lyrics view and never in the background.
+ * - BetterLyrics (lyrics-api.boidu.dev): word-timed lyrics, but only for songs its server has
+ *   already fetched; anything else needs an API key and falls through.
+ * - LRCLIB (lrclib.net): a free community database that needs no key.
+ * - KuGou (kugou.com): a large Chinese music service, strong on Asian music.
+ *
+ * Media apps almost never publish lyrics in their session metadata, so these are the only general
+ * source. Each lookup sends the track's title, artist, album and length to these services, which
+ * is why it happens only when the driver opens the lyrics view, never in the background. With
+ * [CarSettings.moreLyrics] off, only LRCLIB is asked.
  *
  * Results are cached twice over: in memory for the life of the process, and on disk under the
  * cache directory so a song looked up on a past drive doesn't need the network again on this one.
@@ -33,33 +60,104 @@ object Lyrics {
 
     private val cache = HashMap<String, LyricsResult?>()
 
+    /** Longest any one source may take, DNS included: a server that never answers can't hold the rest up. */
+    private const val SOURCE_TIMEOUT_MS = 12_000L
+    /** How long a cached song waits before its sources are asked again for better lyrics. */
+    private const val RECHECK_MS = 24 * 60 * 60 * 1000L
+    private val io = CoroutineScope(Dispatchers.IO)
+
+    /** Word-timed beats line-timed, which beats plain text. */
+    private const val BEST = 3
+    private fun quality(result: LyricsResult?): Int = when {
+        result == null -> 0
+        !result.synced -> 1
+        result.lines.any { it.words.isNotEmpty() } -> BEST
+        else -> 2
+    }
+
+    /** One place to look, with the best [quality] it can give. */
+    private class Source(val name: String, val best: Int, val lookup: () -> LyricsResult?)
+
+    private fun sources(title: String, artist: String, album: String, durationMs: Long): List<Source> {
+        val more = CarSettings.moreLyrics.value
+        val seconds = (durationMs / 1000).toInt()
+        return buildList {
+            if (more) add(Source("BetterLyrics", BEST) { betterLyrics(title, artist, album, seconds) })
+            add(Source("LRCLIB", 2) { exact(title, artist, album, durationMs) ?: search(title, artist) })
+            if (more) add(Source("KuGou", 2) { kuGou(title, artist, album, seconds) })
+        }
+    }
+
+    private fun key(title: String, artist: String, album: String, durationMs: Long) = "$title|$artist|$album|$durationMs"
+
     suspend fun find(context: Context, title: String, artist: String, album: String, durationMs: Long): LyricsResult? {
         if (title.isBlank()) return null
-        val key = "$title|$artist|$album|$durationMs"
-        synchronized(cache) { if (cache.containsKey(key)) return cache[key] }
+        val key = key(title, artist, album, durationMs)
+        // A miss with only LRCLIB isn't a miss once more sources are on, so the mode is part of it.
+        val memoryKey = "${CarSettings.moreLyrics.value}|$key"
+        synchronized(cache) { if (cache.containsKey(memoryKey)) return cache[memoryKey] }
 
         val fromDisk = withContext(Dispatchers.IO) { readDisk(context, key) }
         if (fromDisk != null) {
-            synchronized(cache) { cache[key] = fromDisk }
+            synchronized(cache) { cache[memoryKey] = fromDisk }
             return fromDisk
         }
 
-        val result = withContext(Dispatchers.IO) {
-            runCatching {
-                exact(title, artist, album, durationMs) ?: search(title, artist)
-            }.onFailure { GearslipLog.w("lyrics: lookup failed: ${it.message}") }.getOrNull()
-        }
-        synchronized(cache) { cache[key] = result }
-        if (result != null) withContext(Dispatchers.IO) { writeDisk(context, key, result) }
+        val result = firstBetter(sources(title, artist, album, durationMs), than = 0)
+        synchronized(cache) { cache[memoryKey] = result }
+        if (result != null) withContext(Dispatchers.IO) { writeDisk(context, key, result, System.currentTimeMillis()) }
         return result
     }
 
+    /**
+     * After [find] answered with [current], looks for better lyrics than it: word-timed where it has
+     * line-timed, timed where it has plain. Only the sources that could beat it are asked, and only
+     * once a day per song, so an old cache entry improves when a source gains the song without every
+     * play sending the song out again. Returns the better lyrics, or null to keep [current].
+     */
+    suspend fun upgrade(
+        context: Context, title: String, artist: String, album: String, durationMs: Long, current: LyricsResult,
+    ): LyricsResult? {
+        val have = quality(current)
+        if (have >= BEST || title.isBlank()) return null
+        val key = key(title, artist, album, durationMs)
+        val checked = withContext(Dispatchers.IO) { checkedAt(context, key) }
+        if (System.currentTimeMillis() - checked < RECHECK_MS) return null
+
+        val candidates = sources(title, artist, album, durationMs).filter { it.best > have && it.name != current.source }
+        val better = firstBetter(candidates, than = have)
+        withContext(Dispatchers.IO) { writeDisk(context, key, better ?: current, System.currentTimeMillis()) }
+        if (better == null) return null
+        GearslipLog.i("lyrics: replaced ${current.source.ifEmpty { "cached" }} lyrics with ${better.source}'s")
+        synchronized(cache) { cache["${CarSettings.moreLyrics.value}|$key"] = better }
+        return better
+    }
+
+    /** Asks [sources] in order and returns the first answer of a higher [quality] than [than]. */
+    private suspend fun firstBetter(sources: List<Source>, than: Int): LyricsResult? {
+        for (source in sources) {
+            val job = io.async {
+                runCatching(source.lookup).onFailure { GearslipLog.w("lyrics: ${source.name} failed: ${it.message}") }.getOrNull()
+            }
+            val result = withTimeoutOrNull(SOURCE_TIMEOUT_MS) { job.await() }
+                ?.let { LyricsResult(it.lines, it.synced, source.name) }
+            if (quality(result) > than) {
+                GearslipLog.i("lyrics: found on ${source.name} (${if (result!!.synced) "synced" else "plain"})")
+                return result
+            }
+        }
+        return null
+    }
+
     private fun cacheFile(context: Context, key: String): File {
         val digest = MessageDigest.getInstance("SHA-1").digest(key.toByteArray())
         val name = digest.joinToString("") { "%02x".format(it) }
-        return File(context.cacheDir, "lyrics").apply { mkdirs() }.resolve("$name.json")
+        return File(context.cacheDir, LYRICS_DIR).apply { mkdirs() }.resolve("$name.json")
     }
 
+    /** Where the lyrics cache lives under the app's cache directory, for the storage screen too. */
+    const val LYRICS_DIR = "lyrics"
+
     private fun readDisk(context: Context, key: String): LyricsResult? = runCatching {
         val file = cacheFile(context, key)
         if (!file.exists()) return null
@@ -67,23 +165,153 @@ object Lyrics {
         val lines = json.getJSONArray("lines").let { arr ->
             (0 until arr.length()).map { i ->
                 val line = arr.getJSONObject(i)
-                LyricLine(line.getLong("t"), line.getString("x"))
+                val words = line.optJSONArray("w")?.let { w ->
+                    (0 until w.length()).map { j ->
+                        val word = w.getJSONArray(j)
+                        LyricWord(word.getLong(0), word.getLong(1), word.getString(2))
+                    }
+                }.orEmpty()
+                LyricLine(line.getLong("t"), line.getString("x"), words)
             }
         }
-        LyricsResult(lines, json.getBoolean("synced"))
+        val source = json.optString("source")
+        // Saved before word timings were kept: fetch again rather than wait a day for an upgrade
+        // that skips the source it came from.
+        if (source == "BetterLyrics" && lines.none { it.words.isNotEmpty() }) return null
+        LyricsResult(lines, json.getBoolean("synced"), source)
     }.getOrNull()
 
-    private fun writeDisk(context: Context, key: String, result: LyricsResult) {
+    /** When the song's sources were last asked; 0 for entries from before the date was kept. */
+    private fun checkedAt(context: Context, key: String): Long =
+        runCatching { JSONObject(cacheFile(context, key).readText()).optLong("checked") }.getOrDefault(0L)
+
+    private fun writeDisk(context: Context, key: String, result: LyricsResult, checked: Long) {
         runCatching {
             val lines = JSONArray()
             result.lines.forEach { line ->
-                lines.put(JSONObject().put("t", line.timeMs).put("x", line.text))
+                val entry = JSONObject().put("t", line.timeMs).put("x", line.text)
+                if (line.words.isNotEmpty()) {
+                    entry.put("w", JSONArray(line.words.map { JSONArray().put(it.startMs).put(it.endMs).put(it.text) }))
+                }
+                lines.put(entry)
             }
-            val json = JSONObject().put("synced", result.synced).put("lines", lines)
+            val json = JSONObject().put("synced", result.synced).put("source", result.source)
+                .put("checked", checked).put("lines", lines)
             cacheFile(context, key).writeText(json.toString())
         }.onFailure { GearslipLog.w("lyrics: could not write disk cache: ${it.message}") }
     }
 
+    /** Forgets every cached song, on disk and in memory. */
+    fun clearCache(context: Context) {
+        synchronized(cache) { cache.clear() }
+        File(context.cacheDir, LYRICS_DIR).deleteRecursively()
+    }
+
+    // --- BetterLyrics ---
+
+    private fun betterLyrics(title: String, artist: String, album: String, seconds: Int): LyricsResult? {
+        if (artist.isBlank()) return null
+        val query = buildString {
+            append("s=").append(enc(title)).append("&a=").append(enc(artist))
+            if (seconds > 0) append("&d=").append(seconds)
+            if (album.isNotBlank()) append("&al=").append(enc(album))
+        }
+        val body = get("https://lyrics-api.boidu.dev/getLyrics?$query") ?: return null
+        val ttml = JSONObject(body).optString("ttml").takeIf { it.isNotBlank() && it != "null" } ?: return null
+        return parseTtml(ttml)
+    }
+
+    /**
+     * Apple-style TTML: one `<p begin=…>` per line, its words in `<span begin=… end=…>`s with
+     * spaces between; a word sung in syllables is several spans with no space. Background vocals,
+     * translations and romanisations are left out, so a line reads as sung.
+     */
+    private fun parseTtml(ttml: String): LyricsResult? {
+        val parser = Xml.newPullParser().apply {
+            setFeature(XmlPullParser.FEATURE_PROCESS_NAMESPACES, true)
+            setInput(StringReader(ttml))
+        }
+        val lines = mutableListOf<LyricLine>()
+        var inP = false
+        var lineBegin: Long? = null
+        var firstSpanBegin: Long? = null
+        var skipDepth = 0
+        val text = StringBuilder()
+        // The span being read, and the words of the line so far, each with the space after it.
+        var spanBegin: Long? = null
+        var spanEnd: Long? = null
+        val words = mutableListOf<Triple<Long, Long, StringBuilder>>()
+        var event = parser.eventType
+        while (event != XmlPullParser.END_DOCUMENT) {
+            when (event) {
+                XmlPullParser.START_TAG -> when {
+                    parser.name == "p" -> {
+                        inP = true; text.clear(); firstSpanBegin = null; words.clear()
+                        lineBegin = attr(parser, "begin")?.let(::ttmlMs)
+                    }
+                    inP && skipDepth > 0 -> skipDepth++
+                    inP && parser.name == "span" -> {
+                        val role = attr(parser, "role")
+                        if (role == "x-bg" || role == "x-translation" || role == "x-roman") skipDepth = 1
+                        else {
+                            spanBegin = attr(parser, "begin")?.let(::ttmlMs)
+                            spanEnd = attr(parser, "end")?.let(::ttmlMs)
+                            if (firstSpanBegin == null) firstSpanBegin = spanBegin
+                        }
+                    }
+                }
+                XmlPullParser.TEXT -> if (inP && skipDepth == 0) {
+                    val raw = parser.text
+                    text.append(raw)
+                    val begin = spanBegin
+                    val end = spanEnd
+                    if (begin != null && end != null && raw.isNotBlank()) {
+                        val word = raw.replace(Regex("\\s+"), " ").trimStart()
+                        words.add(Triple(begin, end, StringBuilder(word)))
+                    } else if (raw.isNotEmpty() && raw.isBlank() && words.isNotEmpty() && !words.last().third.endsWith(" ")) {
+                        words.last().third.append(' ')
+                    }
+                }
+                XmlPullParser.END_TAG -> when {
+                    inP && skipDepth > 0 -> skipDepth--
+                    inP && parser.name == "span" -> { spanBegin = null; spanEnd = null }
+                    parser.name == "p" -> {
+                        inP = false
+                        val timed = words.map { (b, e, w) -> LyricWord(b, e, w.toString()) }
+                        val line = if (timed.isNotEmpty()) timed.joinToString("") { it.text }.trim()
+                        else text.toString().replace(Regex("\\s+"), " ").trim()
+                        if (line.isNotEmpty()) lines.add(LyricLine(lineBegin ?: firstSpanBegin ?: -1, line, timed))
+                    }
+                }
+            }
+            event = parser.next()
+        }
+        if (lines.isEmpty()) return null
+        val synced = lines.all { it.timeMs >= 0 } && lines.any { it.timeMs > 0 }
+        return if (synced) LyricsResult(lines.sortedBy { it.timeMs }, synced = true)
+        else LyricsResult(lines.map { LyricLine(0, it.text) }, synced = false)
+    }
+
+    private fun attr(parser: XmlPullParser, localName: String): String? =
+        (0 until parser.attributeCount).firstOrNull { parser.getAttributeName(it) == localName }
+            ?.let { parser.getAttributeValue(it) }
+
+    /** TTML times: `1:23.456`, `1:02:03.4`, `83.456s`, `250ms` or a bare number of seconds. */
+    private fun ttmlMs(raw: String): Long? {
+        val t = raw.trim()
+        val seconds = when {
+            ':' in t -> t.split(':').fold(0.0) { acc, part -> acc * 60 + (part.toDoubleOrNull() ?: return null) }
+            t.endsWith("ms") -> (t.dropLast(2).toDoubleOrNull() ?: return null) / 1000
+            t.endsWith("s") -> t.dropLast(1).toDoubleOrNull() ?: return null
+            t.endsWith("m") -> (t.dropLast(1).toDoubleOrNull() ?: return null) * 60
+            t.endsWith("h") -> (t.dropLast(1).toDoubleOrNull() ?: return null) * 3600
+            else -> t.toDoubleOrNull() ?: return null
+        }
+        return (seconds * 1000).toLong()
+    }
+
+    // --- LRCLIB ---
+
     private fun exact(title: String, artist: String, album: String, durationMs: Long): LyricsResult? {
         if (artist.isBlank()) return null
         val query = buildString {
@@ -111,6 +339,73 @@ object Lyrics {
         return LyricsResult(plain.lines().map { LyricLine(0, it) }, synced = false)
     }
 
+    // --- KuGou ---
+
+    /** Songs within this many seconds of the playing one count as the same recording. */
+    private const val KUGOU_DURATION_SLACK = 8
+    private val KUGOU_TIMED = Regex("""\[(\d\d):(\d\d)\.(\d{2,3})].*""")
+    /** A credit line such as `[00:01.00]作词：…` or `[00:02.00]Composer: …`. */
+    private val KUGOU_CREDIT = Regex(""".+].+[:：].+""")
+    private const val KUGOU_CREDIT_LINES = 30
+
+    private fun kuGou(title: String, artist: String, album: String, seconds: Int): LyricsResult? {
+        val keyword = buildString {
+            append(kuGouTitle(title)).append(" - ").append(kuGouArtist(artist))
+            if (album.isNotBlank()) append(' ').append(album)
+        }
+        val encoded = URLEncoder.encode(keyword, "UTF-8").replace("+", "%20")
+        // First the song itself, matched by length, then its lyrics by the song's hash.
+        val songs = get(
+            "https://mobileservice.kugou.com/api/v3/search/song?version=9108&plat=0&pagesize=8&showtype=0&keyword=$encoded",
+        )?.let { JSONObject(it).optJSONObject("data")?.optJSONArray("info") }
+        if (songs != null) for (i in 0 until songs.length()) {
+            val song = songs.getJSONObject(i)
+            if (seconds > 0 && abs(song.optInt("duration") - seconds) > KUGOU_DURATION_SLACK) continue
+            val hash = song.optString("hash").takeIf { it.isNotBlank() } ?: continue
+            kuGouCandidate("hash=" + enc(hash))?.let { return it }
+        }
+        // Then a plain lyrics search by name.
+        val byName = "keyword=$encoded" + if (seconds > 0) "&duration=${seconds * 1000}" else ""
+        return kuGouCandidate(byName)
+    }
+
+    private fun kuGouCandidate(query: String): LyricsResult? {
+        val body = get("https://lyrics.kugou.com/search?ver=1&man=yes&client=pc&$query") ?: return null
+        val candidate = JSONObject(body).optJSONArray("candidates")?.optJSONObject(0) ?: return null
+        val id = candidate.optLong("id").takeIf { it != 0L } ?: return null
+        val accessKey = candidate.optString("accesskey").takeIf { it.isNotBlank() } ?: return null
+        val download = get(
+            "https://lyrics.kugou.com/download?fmt=lrc&charset=utf8&client=pc&ver=1&id=$id&accesskey=${enc(accessKey)}",
+        ) ?: return null
+        val content = JSONObject(download).optString("content").takeIf { it.isNotBlank() } ?: return null
+        val lrc = String(Base64.decode(content, Base64.DEFAULT), Charsets.UTF_8)
+        val lines = parseLrc(kuGouTrim(lrc).joinToString("\n")).filter { it.text.isNotEmpty() }
+        return if (lines.isEmpty()) null else LyricsResult(lines, synced = true)
+    }
+
+    /** Keeps the timed lines and drops the songwriter and producer credits KuGou puts at either end. */
+    private fun kuGouTrim(lrc: String): List<String> {
+        val timed = lrc.lines().filter { it.matches(KUGOU_TIMED) }
+        if (timed.isEmpty()) return timed
+        val headLimit = minOf(KUGOU_CREDIT_LINES, timed.lastIndex)
+        val head = (headLimit downTo 0).firstOrNull { timed[it].matches(KUGOU_CREDIT) }?.plus(1) ?: 0
+        val rest = timed.drop(head)
+        if (rest.isEmpty()) return rest
+        val tailLimit = minOf(KUGOU_CREDIT_LINES, rest.lastIndex)
+        val tail = (tailLimit downTo 0).firstOrNull { rest[rest.lastIndex - it].matches(KUGOU_CREDIT) }?.plus(1) ?: 0
+        return rest.dropLast(tail)
+    }
+
+    /** KuGou's titles leave out bracketed extras such as "(feat. …)" or "（Live）". */
+    private fun kuGouTitle(title: String) = listOf("\\(.*\\)", "（.*）", "「.*」", "『.*』", "<.*>", "《.*》", "〈.*〉", "＜.*＞")
+        .fold(title) { acc, pattern -> acc.replace(Regex(pattern), "") }.trim()
+
+    /** KuGou joins several artists with "、". */
+    private fun kuGouArtist(artist: String) = artist.replace(", ", "、").replace(" & ", "、").replace(".", "")
+        .replace(Regex("\\(.*\\)"), "").replace(Regex("（.*）"), "").trim()
+
+    // --- shared ---
+
     /** `[01:23.45] words` - a line may carry several stamps when a chorus repeats. */
     private fun parseLrc(text: String): List<LyricLine> {
         val stamp = Regex("""\[(\d+):(\d+(?:\.\d+)?)]""")
@@ -129,6 +424,7 @@ object Lyrics {
             connectTimeout = 5_000
             readTimeout = 8_000
             setRequestProperty("User-Agent", "Gearslip (car media host)")
+            setRequestProperty("Accept", "application/json")
         }
         return try {
             if (connection.responseCode != 200) null else connection.inputStream.bufferedReader().readText()

gearslip/src/main/java/app/seb3thehacker/gearslip/notify/GearslipNotificationListener.kt

@@ -27,7 +27,10 @@ class GearslipNotificationListener : NotificationListenerService() {
 
     override fun onNotificationPosted(sbn: StatusBarNotification) = ingest(sbn, quiet = false)
 
-    override fun onNotificationRemoved(sbn: StatusBarNotification) = CarNotifications.gone(sbn.key)
+    override fun onNotificationRemoved(sbn: StatusBarNotification) {
+        PhoneNavigation.removed(sbn.key)
+        CarNotifications.gone(sbn.key)
+    }
 
     private fun ingest(sbn: StatusBarNotification, quiet: Boolean) {
         // Gearslip's own notifications are skipped, except a debug build's test message.
@@ -35,6 +38,11 @@ class GearslipNotificationListener : NotificationListenerService() {
             !(app.seb3thehacker.gearslip.BuildConfig.DEBUG && sbn.notification.channelId == TestMessage.CHANNEL)
         ) return
         val n = sbn.notification
+        // Google Maps or Waze guiding on the phone: the turn goes to the nav bar and the cluster.
+        if (n.category == Notification.CATEGORY_NAVIGATION && sbn.packageName in PhoneNavigation.APPS) {
+            PhoneNavigation.posted(this, sbn)
+            return
+        }
         // Ongoing entries (media, navigation, downloads) and group headers are status, not news.
         if (n.flags and (Notification.FLAG_ONGOING_EVENT or Notification.FLAG_GROUP_SUMMARY) != 0) return
         if (n.category in QUIET_CATEGORIES) return

gearslip/src/main/java/app/seb3thehacker/gearslip/notify/PhoneNavigation.kt

@@ -0,0 +1,147 @@
+package app.seb3thehacker.gearslip.notify
+
+import android.app.Notification
+import android.content.Context
+import android.graphics.Bitmap
+import android.service.notification.StatusBarNotification
+import androidx.car.app.model.Distance
+import androidx.car.app.navigation.model.Maneuver
+import androidx.core.graphics.drawable.toBitmap
+import app.seb3thehacker.gearslip.GearslipLog
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+
+/**
+ * The next turn from a map app guiding on the phone itself. Google Maps and Waze refuse to run on
+ * Gearslip's car screen, but while one of them navigates on the phone it keeps a notification up
+ * with the turn's arrow, the distance and the road. Gearslip reads it, through the notification
+ * access it already has, and puts the turn in the nav bar and on the instrument cluster.
+ */
+object PhoneNavigation {
+
+    /** One turn as the notification described it. [maneuver] is a guess from the words, English only. */
+    class Turn(
+        val key: String,
+        val packageName: String,
+        val arrow: Bitmap?,
+        val distance: Distance?,
+        val distanceText: String,
+        val road: String,
+        val maneuver: Int,
+    )
+
+    private val _turn = MutableStateFlow<Turn?>(null)
+    val turn: StateFlow<Turn?> = _turn
+
+    /** The apps whose turns are read; any other map app runs on the car screen itself. */
+    val APPS = setOf("com.google.android.apps.maps", "com.waze")
+
+    private val log = GearslipLog.tagged("nav")
+
+    fun posted(context: Context, sbn: StatusBarNotification) {
+        val turn = parse(context, sbn)
+        val was = _turn.value
+        if (turn == null) {
+            if (was?.key == sbn.key) _turn.value = null
+            return
+        }
+        if (was == null || was.road != turn.road || was.maneuver != turn.maneuver) {
+            log.i("phone navigation (${sbn.packageName}): ${turn.distanceText} | ${turn.road} | maneuver=${turn.maneuver}")
+        }
+        _turn.value = turn
+    }
+
+    fun removed(key: String) {
+        if (_turn.value?.key == key) {
+            log.i("phone navigation ended")
+            _turn.value = null
+        }
+    }
+
+    /**
+     * Google Maps puts the distance in the title and the instruction in the text; Waze has been
+     * seen the other way round. Whichever field starts with a distance is the distance, and the
+     * other is the instruction.
+     */
+    private fun parse(context: Context, sbn: StatusBarNotification): Turn? {
+        val extras = sbn.notification.extras
+        fun field(name: String) = extras.getCharSequence(name)?.toString()?.trim().orEmpty()
+        val fields = listOf(field(Notification.EXTRA_TITLE), field(Notification.EXTRA_TEXT), field(Notification.EXTRA_BIG_TEXT))
+            .filter { it.isNotEmpty() }
+        if (fields.isEmpty()) return null
+        val withDistance = fields.firstOrNull { DISTANCE.find(it)?.range?.first == 0 }
+        val match = withDistance?.let { DISTANCE.find(it) }
+        val rest = withDistance?.substring(match!!.range.last + 1)?.trimStart(' ', '·', '-', '•', ',')?.trim().orEmpty()
+        val instruction = fields.firstOrNull { it != withDistance }?.takeIf { it.isNotEmpty() } ?: rest
+        if (instruction.isEmpty() && match == null) return null
+        return Turn(
+            key = sbn.key,
+            packageName = sbn.packageName,
+            arrow = arrow(context, sbn.notification),
+            distance = match?.let { distanceOf(it) },
+            distanceText = match?.value?.trim().orEmpty(),
+            road = roadOf(instruction),
+            maneuver = maneuverOf(instruction),
+        )
+    }
+
+    private fun arrow(context: Context, n: Notification): Bitmap? = runCatching {
+        n.getLargeIcon()?.loadDrawable(context)?.toBitmap(ARROW_PX, ARROW_PX)
+    }.getOrNull()
+
+    private fun distanceOf(m: MatchResult): Distance? {
+        val value = m.groupValues[1].replace(',', '.').toDoubleOrNull() ?: return null
+        val unit = when (m.groupValues[2].lowercase()) {
+            "km" -> Distance.UNIT_KILOMETERS
+            "mi" -> Distance.UNIT_MILES
+            "ft" -> Distance.UNIT_FEET
+            "yd" -> Distance.UNIT_YARDS
+            else -> Distance.UNIT_METERS
+        }
+        val meters = value * when (unit) {
+            Distance.UNIT_KILOMETERS -> 1000.0
+            Distance.UNIT_MILES -> 1609.344
+            Distance.UNIT_FEET -> 0.3048
+            Distance.UNIT_YARDS -> 0.9144
+            else -> 1.0
+        }
+        return Distance.create(meters, unit)
+    }
+
+    /** "Turn left onto Main St" shows as "Main St"; anything else shows as it came. */
+    private fun roadOf(instruction: String): String {
+        val lower = instruction.lowercase()
+        for (word in ROAD_WORDS) {
+            val at = lower.indexOf(word)
+            if (at >= 0) return instruction.substring(at + word.length).trim()
+        }
+        return instruction
+    }
+
+    private fun maneuverOf(instruction: String): Int {
+        val s = instruction.lowercase()
+        val left = "left" in s
+        val right = "right" in s
+        fun side(l: Int, r: Int) = if (left) l else if (right) r else Maneuver.TYPE_UNKNOWN
+        return when {
+            "u-turn" in s || "make a u" in s -> side(Maneuver.TYPE_U_TURN_LEFT, Maneuver.TYPE_U_TURN_RIGHT)
+            "roundabout" in s -> Maneuver.TYPE_UNKNOWN // the car's icon needs an exit number we don't have
+            "destination" in s || "arrive" in s -> side(Maneuver.TYPE_DESTINATION_LEFT, Maneuver.TYPE_DESTINATION_RIGHT)
+                .takeIf { it != Maneuver.TYPE_UNKNOWN } ?: Maneuver.TYPE_DESTINATION
+            "exit" in s -> side(Maneuver.TYPE_OFF_RAMP_NORMAL_LEFT, Maneuver.TYPE_OFF_RAMP_NORMAL_RIGHT)
+            "merge" in s -> side(Maneuver.TYPE_MERGE_LEFT, Maneuver.TYPE_MERGE_RIGHT)
+                .takeIf { it != Maneuver.TYPE_UNKNOWN } ?: Maneuver.TYPE_MERGE_SIDE_UNSPECIFIED
+            "fork" in s -> side(Maneuver.TYPE_FORK_LEFT, Maneuver.TYPE_FORK_RIGHT)
+            "keep" in s || "stay" in s -> side(Maneuver.TYPE_KEEP_LEFT, Maneuver.TYPE_KEEP_RIGHT)
+            "slight" in s -> side(Maneuver.TYPE_TURN_SLIGHT_LEFT, Maneuver.TYPE_TURN_SLIGHT_RIGHT)
+            "sharp" in s -> side(Maneuver.TYPE_TURN_SHARP_LEFT, Maneuver.TYPE_TURN_SHARP_RIGHT)
+            "turn" in s -> side(Maneuver.TYPE_TURN_NORMAL_LEFT, Maneuver.TYPE_TURN_NORMAL_RIGHT)
+            "continue" in s || "straight" in s || "head " in s -> Maneuver.TYPE_STRAIGHT
+            else -> Maneuver.TYPE_UNKNOWN
+        }
+    }
+
+    private const val ARROW_PX = 96
+    private val DISTANCE = Regex("""^\s*(\d+(?:[.,]\d+)?)\s*(km|mi|ft|yd|m)\b""", RegexOption.IGNORE_CASE)
+    private val ROAD_WORDS = listOf(" onto ", " on to ", " toward ", " towards ", " on ")
+}

gearslip/src/main/java/app/seb3thehacker/gearslip/stats/UsageStats.kt

@@ -226,11 +226,11 @@ object UsageStats {
      * build names, not confirmed on a real phone.
      */
     fun osName(context: Context): String {
-        fun installed(pkg: String) = runCatching { context.packageManager.getPackageInfo(pkg, 0) }.isSuccess
+        fun installed(pkg: String) = installed(context, pkg)
         val names = listOf("ro.build.flavor", "ro.build.display.id", "ro.lineage.version")
             .joinToString(" ") { prop(it) } + " " + Build.DISPLAY + " " + Build.FINGERPRINT
         return when {
-            installed("app.grapheneos.setupwizard") -> "GrapheneOS"
+            isGrapheneOs(context) -> "GrapheneOS"
             prop("ro.calyxos.version").isNotEmpty() -> "CalyxOS"
             installed("foundation.e.apps") -> "/e/OS"
             names.contains("iode", ignoreCase = true) -> "iodéOS"
@@ -240,6 +240,12 @@ object UsageStats {
         }
     }
 
+    /** GrapheneOS, told apart from stock Pixel firmware by its own setup app. */
+    fun isGrapheneOs(context: Context) = installed(context, "app.grapheneos.setupwizard")
+
+    private fun installed(context: Context, pkg: String) =
+        runCatching { context.packageManager.getPackageInfo(pkg, 0) }.isSuccess
+
     /** A system property, or "" when it isn't set or can't be read. */
     private fun prop(name: String): String = runCatching {
         Class.forName("android.os.SystemProperties").getMethod("get", String::class.java)

gearslip/src/main/java/app/seb3thehacker/gearslip/stats/WorkedPrompt.kt

@@ -26,7 +26,7 @@ object WorkedPrompt {
     private var loaded = false
     private val flow = MutableStateFlow<String?>(null)
 
-    /** The car's name while the ask is waiting for an answer, otherwise null. */
+    /** The car's name while the ask is waiting for an answer (empty when the car didn't say), otherwise null. */
     fun pending(context: Context): StateFlow<String?> {
         if (!loaded) {
             loaded = true
@@ -99,17 +99,14 @@ object WorkedPrompt {
     private fun saved(context: Context): JSONObject? =
         prefs(context).getString(KEY_CAR, null)?.let { runCatching { JSONObject(it) }.getOrNull() }
 
-    /** "your 2019 Clio", "your Renault Media Nav", or "your car" when it didn't say. */
+    /** "2019 Clio", "Renault Media Nav", or empty when the car didn't say. */
     private fun carName(car: JSONObject): String {
         val model = car.optString("car").trim()
         val year = car.optString("year").trim().takeIf { it.isNotEmpty() && it != "0" }
         val unit = "${car.optString("make")} ${car.optString("model")}".trim()
         return when {
-            model.isNotEmpty() -> "your " + listOfNotNull(year, model).joinToString(" ")
-            unit.isNotEmpty() -> "your $unit"
-            else -> "your car"
+            model.isNotEmpty() -> listOfNotNull(year, model).joinToString(" ")
+            else -> unit
         }
     }
-
-    const val TITLE_START = "Gearslip worked with "
 }

gearslip/src/main/java/app/seb3thehacker/gearslip/ui/AboutLinks.kt

@@ -1,5 +1,7 @@
 package app.seb3thehacker.gearslip.ui
 
+import androidx.compose.ui.res.stringResource
+import app.seb3thehacker.gearslip.R
 import android.content.ClipData
 import android.content.ClipboardManager
 import android.content.Context
@@ -11,6 +13,7 @@ import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.automirrored.filled.KeyboardArrowRight
 import androidx.compose.material.icons.automirrored.filled.Send
 import androidx.compose.material.icons.filled.Build
+import androidx.compose.material.icons.filled.Edit
 import androidx.compose.material.icons.filled.Favorite
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
@@ -44,6 +47,7 @@ internal object GearslipLinks {
     const val MATRIX = "https://matrix.to/#/!mf0_mgBd5KqKpc9FfX_wHp1jFCcwAtPrndIn_oGIyMk?via=matrix.org"
     const val SOURCE = "https://github.com/twinksoftware/gearslip"
     const val CARS = "$SOURCE/blob/main/CARS.md"
+    const val TRANSLATE = "https://hosted.weblate.org/engage/gearslip/"
 
     /** This version's release notes on GitHub; every release is tagged v plus its version name. */
     val RELEASE_NOTES = "$SOURCE/releases/tag/v${app.seb3thehacker.gearslip.BuildConfig.VERSION_NAME}"
@@ -59,14 +63,14 @@ internal object GearslipLinks {
         runCatching {
             context.startActivity(Intent(Intent.ACTION_VIEW, Uri.parse("monero:$MONERO")).addFlags(Intent.FLAG_ACTIVITY_NEW_TASK))
         }.onFailure {
-            Toast.makeText(context, "No Monero wallet app found. Copy the address instead.", Toast.LENGTH_LONG).show()
+            Toast.makeText(context, context.getString(R.string.about_no_wallet), Toast.LENGTH_LONG).show()
         }
     }
 
     fun copyMonero(context: Context) {
         context.getSystemService(ClipboardManager::class.java)
             ?.setPrimaryClip(ClipData.newPlainText("Monero address", MONERO))
-        Toast.makeText(context, "Monero address copied", Toast.LENGTH_SHORT).show()
+        Toast.makeText(context, context.getString(R.string.about_monero_copied), Toast.LENGTH_SHORT).show()
     }
 }
 
@@ -84,7 +88,7 @@ internal fun DonateRows() {
     SettingsRow(
         "Liberapay",
         Modifier.clickable { GearslipLinks.open(context, GearslipLinks.LIBERAPAY) },
-        subtitle = "Give weekly or monthly",
+        subtitle = stringResource(R.string.about_give_regularly),
         icon = Icons.Filled.Favorite,
         trailing = arrow,
     )
@@ -92,16 +96,16 @@ internal fun DonateRows() {
     SettingsRow(
         "Buy Me a Coffee",
         Modifier.clickable { GearslipLinks.open(context, GearslipLinks.BUY_ME_A_COFFEE) },
-        subtitle = "Give once or monthly, by card. Buy Me a Coffee keeps 5%",
+        subtitle = stringResource(R.string.about_bmac_sub),
         icon = Icons.Filled.Favorite,
         trailing = arrow,
     )
     if (GearslipLinks.PAYMENT_LINK.isNotEmpty()) {
         SettingsDivider()
         SettingsRow(
-            "Give once",
+            stringResource(R.string.about_give_once),
             Modifier.clickable { GearslipLinks.open(context, GearslipLinks.PAYMENT_LINK) },
-            subtitle = "Any amount, by card",
+            subtitle = stringResource(R.string.about_any_amount),
             icon = Icons.Filled.Favorite,
             trailing = arrow,
         )
@@ -112,7 +116,7 @@ internal fun DonateRows() {
         SettingsRow(
             "Monero",
             Modifier.clickable { moneroOpen = true },
-            subtitle = "Open your wallet or copy the address",
+            subtitle = stringResource(R.string.about_monero_sub),
             icon = Icons.Filled.Favorite,
             trailing = arrow,
         )
@@ -127,10 +131,10 @@ internal fun MoneroDialog(onDismiss: () -> Unit) {
     AlertDialog(
         onDismissRequest = onDismiss,
         icon = { Icon(Icons.Filled.Favorite, contentDescription = null) },
-        title = { Text("Support with Monero") },
+        title = { Text(stringResource(R.string.about_monero_title)) },
         text = {
             Column(verticalArrangement = Arrangement.spacedBy(12.dp)) {
-                Text("Send any amount to this address from your Monero wallet.")
+                Text(stringResource(R.string.about_monero_body))
                 SelectionContainer {
                     Text(
                         GearslipLinks.MONERO,
@@ -143,20 +147,20 @@ internal fun MoneroDialog(onDismiss: () -> Unit) {
         confirmButton = {
             Column(Modifier.fillMaxWidth(), verticalArrangement = Arrangement.spacedBy(8.dp)) {
                 Button(onClick = { GearslipLinks.openMoneroWallet(context) }, Modifier.fillMaxWidth()) {
-                    Text("Open in wallet")
+                    Text(stringResource(R.string.about_open_wallet))
                 }
                 OutlinedButton(onClick = { GearslipLinks.copyMonero(context) }, Modifier.fillMaxWidth()) {
-                    Text("Copy address")
+                    Text(stringResource(R.string.about_copy_address))
                 }
                 TextButton(onClick = onDismiss, Modifier.fillMaxWidth()) {
-                    Text("Close")
+                    Text(stringResource(R.string.close))
                 }
             }
         },
     )
 }
 
-/** The About section's links: the chat room, the source code, and credits. */
+/** The About section's links: the chat room, translations, the source code, and credits. */
 @Composable
 internal fun AboutLinkRows() {
     val context = LocalContext.current
@@ -168,25 +172,32 @@ internal fun AboutLinkRows() {
         )
     }
     SettingsRow(
-        "Join the chat on Matrix",
+        stringResource(R.string.about_matrix),
         Modifier.clickable { GearslipLinks.open(context, GearslipLinks.MATRIX) },
-        subtitle = "Talk with other drivers about cars, apps, and Gearslip",
+        subtitle = stringResource(R.string.about_matrix_sub),
         icon = Icons.AutoMirrored.Filled.Send,
         trailing = arrow,
     )
     SettingsDivider()
     SettingsRow(
-        "Source code",
+        stringResource(R.string.about_translate),
+        Modifier.clickable { GearslipLinks.open(context, GearslipLinks.TRANSLATE) },
+        subtitle = stringResource(R.string.about_translate_sub),
+        icon = Icons.Filled.Edit,
+        trailing = arrow,
+    )
+    SettingsDivider()
+    SettingsRow(
+        stringResource(R.string.about_source),
         Modifier.clickable { GearslipLinks.open(context, GearslipLinks.SOURCE) },
-        subtitle = "Read or change Gearslip's code under the AGPL",
+        subtitle = stringResource(R.string.about_source_sub),
         icon = Icons.Filled.Build,
         trailing = arrow,
     )
     SettingsDivider()
     SettingsRow(
-        "Voice credits",
-        subtitle = "Speech recognition by sherpa-onnx (Apache 2.0), with Kroko ASR by Banafo " +
-            "(CC BY-SA 4.0), and Parakeet and Canary by NVIDIA (CC BY 4.0)",
+        stringResource(R.string.about_voice_credits),
+        subtitle = stringResource(R.string.about_voice_credits_sub),
         icon = Icons.Filled.Favorite,
     )
 }

gearslip/src/main/java/app/seb3thehacker/gearslip/ui/AudioChoiceDialog.kt

@@ -1,7 +1,16 @@
 package app.seb3thehacker.gearslip.ui
 
+import androidx.compose.ui.res.stringResource
+import app.seb3thehacker.gearslip.R
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material3.Button
+import androidx.compose.material3.OutlinedButton
+import androidx.compose.ui.Modifier
 import androidx.compose.material3.AlertDialog
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Text
@@ -24,27 +33,30 @@ fun AudioChoiceDialog(onUseBluetooth: () -> Unit, onKeepAsking: () -> Unit) {
     var showCommand by remember { mutableStateOf(false) }
     AlertDialog(
         onDismissRequest = onKeepAsking,
-        title = { Text("Play car audio over Bluetooth?") },
+        title = { Text(stringResource(R.string.audio_bt_title)) },
         text = {
-            Column(verticalArrangement = Arrangement.spacedBy(12.dp)) {
-                Text(
-                    "Android treats music sent over USB like sharing your screen, so it asks every " +
-                        "drive. Over Bluetooth it never asks. You can change this later in Settings.",
-                )
+            Column(Modifier.verticalScroll(rememberScrollState()), verticalArrangement = Arrangement.spacedBy(12.dp)) {
+                Text(stringResource(R.string.audio_bt_body))
                 if (showCommand) {
                     Text(
-                        "Or keep USB and stop the question for good: plug the phone into a " +
-                            "computer with USB debugging on, and run this once.",
+                        stringResource(R.string.audio_keep_usb),
                         style = MaterialTheme.typography.bodyMedium,
                     )
                     CopyableCommand("adb shell appops set ${BuildConfig.APPLICATION_ID} PROJECT_MEDIA allow")
-                } else {
-                    TextButton(onClick = { showCommand = true }) { Text("Never ask, using a computer") }
+                }
+                // Stacked full width: three labels this long never fit the dialog's one button row.
+                Column(Modifier.fillMaxWidth().padding(top = 4.dp), verticalArrangement = Arrangement.spacedBy(8.dp)) {
+                    Button(onClick = onUseBluetooth, Modifier.fillMaxWidth()) { Text(stringResource(R.string.audio_use_bt)) }
+                    OutlinedButton(onClick = onKeepAsking, Modifier.fillMaxWidth()) { Text(stringResource(R.string.audio_keep_asking)) }
+                    if (!showCommand) {
+                        TextButton(onClick = { showCommand = true }, Modifier.fillMaxWidth()) {
+                            Text(stringResource(R.string.audio_never_ask))
+                        }
+                    }
                 }
             }
         },
-        confirmButton = { TextButton(onClick = onUseBluetooth) { Text("Use Bluetooth") } },
-        dismissButton = { TextButton(onClick = onKeepAsking) { Text("Keep asking") } },
+        confirmButton = {},
     )
 }
 
@@ -57,15 +69,13 @@ fun AudioChoiceDialog(onUseBluetooth: () -> Unit, onKeepAsking: () -> Unit) {
 fun MicBlockedDialog(onOpenSettings: () -> Unit, onDismiss: () -> Unit) {
     AlertDialog(
         onDismissRequest = onDismiss,
-        title = { Text("Car audio needs the microphone permission") },
+        title = { Text(stringResource(R.string.audio_mic_title)) },
         text = {
             Text(
-                "Android lets an app send other apps' sound to the car only if it has the " +
-                    "microphone permission. It's turned off for Gearslip, so music plays on the " +
-                    "phone. Turn it on under Permissions, then Microphone.",
+                stringResource(R.string.audio_mic_body),
             )
         },
-        confirmButton = { TextButton(onClick = onOpenSettings) { Text("Open app settings") } },
-        dismissButton = { TextButton(onClick = onDismiss) { Text("Not now") } },
+        confirmButton = { TextButton(onClick = onOpenSettings) { Text(stringResource(R.string.audio_open_settings)) } },
+        dismissButton = { TextButton(onClick = onDismiss) { Text(stringResource(R.string.worked_not_now)) } },
     )
 }

gearslip/src/main/java/app/seb3thehacker/gearslip/ui/CarPreviewScreen.kt

@@ -24,6 +24,7 @@ import androidx.compose.material3.Scaffold
 import androidx.compose.material3.Text
 import androidx.compose.material3.TextButton
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.CompositionLocalProvider
 import androidx.compose.runtime.DisposableEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
@@ -59,8 +60,7 @@ import app.seb3thehacker.gearslip.car.CarUi
 @Composable
 fun CarPreviewScreen(onBack: () -> Unit) {
     val context = LocalContext.current
-    val frame by CarEnvironment.frame.collectAsStateWithLifecycle()
-    var viewSize by remember { mutableStateOf(0 to 0) }
+    val frame by remember { CarEnvironment.frame.also { CarEnvironment.applyDensity() } }.collectAsStateWithLifecycle()
     // Tied to how the phone itself is held, not a button: turn it sideways and the preview goes
     // fullscreen, turn it back and the phone's own chrome (the Back/title above the frame) returns.
     val fullscreen = LocalConfiguration.current.orientation == Configuration.ORIENTATION_LANDSCAPE
@@ -69,66 +69,28 @@ fun CarPreviewScreen(onBack: () -> Unit) {
     val custom by app.seb3thehacker.gearslip.car.CarSettings.previewCustom.collectAsStateWithLifecycle()
     val (width, height, density) = previewFrame(context, frame, previewSize, custom)
 
-    val projector = remember { ScreenProjector(context) }
+    // The preview is something to watch, like a map on a dash mount, so the phone stays awake on
+    // it. Only here: the flag goes with this screen, and every other screen sleeps as usual.
+    val view = androidx.compose.ui.platform.LocalView.current
+    DisposableEffect(view) {
+        view.keepScreenOn = true
+        onDispose { view.keepScreenOn = false }
+    }
 
-    DisposableEffect(width, height, density) {
-        CarEnvironment.start(context)
-        // No surface yet: the SurfaceView below hands its own over once it exists, and the
-        // display draws straight into it. Copying each frame into a Bitmap instead cost two
-        // full-size allocations per frame on the main thread, and taps lagged with the size.
-        projector.start(null, width, height, density, name = "gearslip-preview") {
-            androidx.compose.runtime.CompositionLocalProvider(app.seb3thehacker.gearslip.car.LocalCarPreview provides true) { CarUi() }
-        }
-        onDispose { projector.stop() }
+    // A launcher already shows the car UI on this screen, and two of it can't run at once.
+    val launcher by app.seb3thehacker.gearslip.car.LauncherMode.active.collectAsStateWithLifecycle()
+
+    // Held here, not in the frame, so turning the phone between the two layouts keeps the car UI running.
+    val projector = if (launcher) null else rememberCarProjector(width, height, density, "gearslip-preview") {
+        CompositionLocalProvider(app.seb3thehacker.gearslip.car.LocalCarPreview provides true) { CarUi() }
     }
 
     // The frame is drawn the same way in both layouts; only what surrounds it differs.
     val frameContent: @Composable (Modifier) -> Unit = { modifier ->
-        Box(
-            modifier
-                .aspectRatio(width.toFloat() / height)
-                .background(Color.Black)
-                .onSizeChanged { viewSize = it.width to it.height }
-                .pointerInteropFilter { event ->
-                    val (viewWidth, viewHeight) = viewSize
-                    if (viewWidth > 0 && viewHeight > 0) {
-                        projector.dispatchTouch(
-                            event.actionMasked.toCarAction(),
-                            event.actionIndex,
-                            List(event.pointerCount) { i ->
-                                TouchPoint(
-                                    event.getPointerId(i),
-                                    event.getX(i) * width / viewWidth,
-                                    event.getY(i) * height / viewHeight,
-                                )
-                            },
-                        )
-                    }
-                    true
-                },
-            contentAlignment = Alignment.Center,
-        ) {
-            androidx.compose.runtime.key(width, height) {
-                androidx.compose.ui.viewinterop.AndroidView(
-                    factory = { viewContext ->
-                        android.view.SurfaceView(viewContext).apply {
-                            // The car's own size; the compositor scales it to the view.
-                            holder.setFixedSize(width, height)
-                            holder.addCallback(object : android.view.SurfaceHolder.Callback {
-                                override fun surfaceCreated(holder: android.view.SurfaceHolder) =
-                                    projector.setSurface(holder.surface)
-
-                                override fun surfaceChanged(holder: android.view.SurfaceHolder, format: Int, w: Int, h: Int) =
-                                    projector.setSurface(holder.surface)
-
-                                override fun surfaceDestroyed(holder: android.view.SurfaceHolder) =
-                                    projector.setSurface(null)
-                            })
-                        }
-                    },
-                    modifier = Modifier.fillMaxSize(),
-                )
-            }
+        if (projector == null) {
+            Text("Gearslip is this device's home screen, so the car UI is already showing there.", modifier)
+        } else {
+            CarFrame(projector, width, height, modifier.aspectRatio(width.toFloat() / height))
         }
     }
 
@@ -163,6 +125,80 @@ fun CarPreviewScreen(onBack: () -> Unit) {
     }
 }
 
+/**
+ * Runs [content] on a virtual display [width] x [height] pixels big, the way the car gets it,
+ * until it leaves the composition. [CarFrame] shows it.
+ */
+@Composable
+internal fun rememberCarProjector(width: Int, height: Int, density: Int, name: String, content: @Composable () -> Unit): ScreenProjector {
+    val context = LocalContext.current
+    val projector = remember { ScreenProjector(context) }
+    val latestContent by androidx.compose.runtime.rememberUpdatedState(content)
+    DisposableEffect(width, height, density) {
+        CarEnvironment.start(context)
+        // No surface yet: the SurfaceView in CarFrame hands its own over once it exists, and the
+        // display draws straight into it. Copying each frame into a Bitmap instead cost two
+        // full-size allocations per frame on the main thread, and taps lagged with the size.
+        projector.start(null, width, height, density, name = name) { latestContent() }
+        onDispose { projector.stop() }
+    }
+    return projector
+}
+
+/**
+ * The [projector]'s display through a SurfaceView, with touches scaled back to the frame's own
+ * [width] x [height]. The car preview letterboxes it; launcher mode fills the screen with it.
+ */
+@Composable
+internal fun CarFrame(projector: ScreenProjector, width: Int, height: Int, modifier: Modifier) {
+    var viewSize by remember { mutableStateOf(0 to 0) }
+    Box(
+        modifier
+            .background(Color.Black)
+            .onSizeChanged { viewSize = it.width to it.height }
+            .pointerInteropFilter { event ->
+                val (viewWidth, viewHeight) = viewSize
+                if (viewWidth > 0 && viewHeight > 0) {
+                    projector.dispatchTouch(
+                        event.actionMasked.toCarAction(),
+                        event.actionIndex,
+                        List(event.pointerCount) { i ->
+                            TouchPoint(
+                                event.getPointerId(i),
+                                event.getX(i) * width / viewWidth,
+                                event.getY(i) * height / viewHeight,
+                            )
+                        },
+                    )
+                }
+                true
+            },
+        contentAlignment = Alignment.Center,
+    ) {
+        androidx.compose.runtime.key(width, height) {
+            androidx.compose.ui.viewinterop.AndroidView(
+                factory = { viewContext ->
+                    android.view.SurfaceView(viewContext).apply {
+                        // The car's own size; the compositor scales it to the view.
+                        holder.setFixedSize(width, height)
+                        holder.addCallback(object : android.view.SurfaceHolder.Callback {
+                            override fun surfaceCreated(holder: android.view.SurfaceHolder) =
+                                projector.setSurface(holder.surface)
+
+                            override fun surfaceChanged(holder: android.view.SurfaceHolder, format: Int, w: Int, h: Int) =
+                                projector.setSurface(holder.surface)
+
+                            override fun surfaceDestroyed(holder: android.view.SurfaceHolder) =
+                                projector.setSurface(null)
+                        })
+                    }
+                },
+                modifier = Modifier.fillMaxSize(),
+            )
+        }
+    }
+}
+
 /**
  * Fills the phone screen with [content], centred and letterboxed.
  *
@@ -255,7 +291,7 @@ private fun previewFrame(
     size: app.seb3thehacker.gearslip.car.PreviewSize,
     custom: app.seb3thehacker.gearslip.car.ScreenSize?,
 ): Triple<Int, Int, Int> {
-    fun carLike(w: Int, h: Int) = Triple(w, h, (160 * h / 480).coerceIn(120, 640))
+    fun carLike(w: Int, h: Int) = Triple(w, h, app.seb3thehacker.gearslip.car.CarSettings.effectiveDensity((160 * h / 480).coerceIn(120, 640)))
     return when (size) {
         app.seb3thehacker.gearslip.car.PreviewSize.LAST_CAR -> Triple(lastCar.width, lastCar.height, lastCar.densityDpi)
         app.seb3thehacker.gearslip.car.PreviewSize.CUSTOM ->

gearslip/src/main/java/app/seb3thehacker/gearslip/ui/CarScreenSettings.kt

@@ -1,5 +1,7 @@
 package app.seb3thehacker.gearslip.ui
 
+import androidx.compose.ui.res.stringResource
+import app.seb3thehacker.gearslip.R
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
@@ -41,19 +43,18 @@ internal fun CarScreenSection() {
 
     if (editingCar) {
         SizeDialog(
-            title = "Car screen size",
-            note = "Use this if the car's picture looks stretched. Enter the screen's real size, " +
-                "such as 1280x480. It takes effect the next time you connect.",
+            title = stringResource(R.string.screen_car_size),
+            note = stringResource(R.string.screen_car_size_note),
             initial = size,
-            clearLabel = "Use the car's",
+            clearLabel = stringResource(R.string.screen_use_cars),
             onDismiss = { editingCar = false },
             onSave = { CarSettings.setScreenSize(it); editingCar = false },
         )
     }
     if (editingPreview) {
         SizeDialog(
-            title = "Preview size",
-            note = "The size the car preview draws at, such as 1920x720.",
+            title = stringResource(R.string.screen_preview_size),
+            note = stringResource(R.string.screen_preview_note),
             initial = previewCustom,
             clearLabel = null,
             onDismiss = { editingPreview = false },
@@ -65,62 +66,62 @@ internal fun CarScreenSection() {
     }
 
     SettingsSection(
-        "Car screen",
-        footer = "Gearslip uses the size the car reports unless you set one.",
+        stringResource(R.string.screen_car_screen),
+        footer = stringResource(R.string.screen_footer),
     ) {
         SettingsRow(
-            "Screen size",
+            stringResource(R.string.screen_size),
             Modifier.clickable { editingCar = true },
-            subtitle = size?.let { "$it, set by you" } ?: "From the car",
+            subtitle = size?.let { stringResource(R.string.screen_set_by_you, it.toString()) } ?: stringResource(R.string.screen_from_car),
         )
         if (size != null) {
             SettingsDivider()
             SettingsRow(
-                "Crop the edges",
+                stringResource(R.string.screen_crop),
                 Modifier.selectable(fit == ScreenFit.CROP, role = Role.RadioButton) { CarSettings.setScreenFit(ScreenFit.CROP) },
-                subtitle = "For a car that cuts off the top and bottom, or the sides",
+                subtitle = stringResource(R.string.screen_crop_sub),
                 trailing = { RadioButton(selected = fit == ScreenFit.CROP, onClick = null) },
             )
             SettingsDivider()
             SettingsRow(
-                "Squash to fit",
+                stringResource(R.string.screen_squash),
                 Modifier.selectable(fit == ScreenFit.SQUASH, role = Role.RadioButton) { CarSettings.setScreenFit(ScreenFit.SQUASH) },
-                subtitle = "For a car that squeezes the whole picture, so circles look like ovals",
+                subtitle = stringResource(R.string.screen_squash_sub),
                 trailing = { RadioButton(selected = fit == ScreenFit.SQUASH, onClick = null) },
             )
         }
     }
 
-    SettingsSection("Car preview size") {
+    SettingsSection(stringResource(R.string.screen_preview_title)) {
         SettingsRow(
-            "Last car",
+            stringResource(R.string.screen_last_car),
             Modifier.selectable(preview == PreviewSize.LAST_CAR, role = Role.RadioButton) {
                 CarSettings.setPreviewSize(PreviewSize.LAST_CAR)
             },
-            subtitle = "The size of the last car you connected to",
+            subtitle = stringResource(R.string.screen_last_car_sub),
             trailing = { RadioButton(selected = preview == PreviewSize.LAST_CAR, onClick = null) },
         )
         SettingsDivider()
         SettingsRow(
-            "This screen",
+            stringResource(R.string.screen_this_screen),
             Modifier.selectable(preview == PreviewSize.FILL, role = Role.RadioButton) {
                 CarSettings.setPreviewSize(PreviewSize.FILL)
             },
-            subtitle = "Fills this device's screen, for a head unit running Gearslip itself",
+            subtitle = stringResource(R.string.screen_this_screen_sub),
             trailing = { RadioButton(selected = preview == PreviewSize.FILL, onClick = null) },
         )
         SettingsDivider()
         SettingsRow(
-            "Custom",
+            stringResource(R.string.screen_custom),
             Modifier.selectable(preview == PreviewSize.CUSTOM, role = Role.RadioButton) {
                 if (previewCustom == null) editingPreview = true else CarSettings.setPreviewSize(PreviewSize.CUSTOM)
             },
-            subtitle = previewCustom?.toString() ?: "Enter a size",
+            subtitle = previewCustom?.toString() ?: stringResource(R.string.screen_enter_size),
             trailing = { RadioButton(selected = preview == PreviewSize.CUSTOM, onClick = null) },
         )
         if (preview == PreviewSize.CUSTOM) {
             SettingsDivider()
-            SettingsRow("Change the custom size", Modifier.clickable { editingPreview = true })
+            SettingsRow(stringResource(R.string.screen_change_custom), Modifier.clickable { editingPreview = true })
         }
     }
 }
@@ -145,14 +146,14 @@ private fun SizeDialog(
         text = {
             Column(verticalArrangement = Arrangement.spacedBy(12.dp)) {
                 Text(note)
-                OutlinedTextField(width, { width = it.filter(Char::isDigit) }, label = { Text("Width") }, singleLine = true, keyboardOptions = number)
-                OutlinedTextField(height, { height = it.filter(Char::isDigit) }, label = { Text("Height") }, singleLine = true, keyboardOptions = number)
+                OutlinedTextField(width, { width = it.filter(Char::isDigit) }, label = { Text(stringResource(R.string.screen_width)) }, singleLine = true, keyboardOptions = number)
+                OutlinedTextField(height, { height = it.filter(Char::isDigit) }, label = { Text(stringResource(R.string.screen_height)) }, singleLine = true, keyboardOptions = number)
             }
         },
-        confirmButton = { TextButton(onClick = { onSave(parsed) }, enabled = parsed != null) { Text("Save") } },
+        confirmButton = { TextButton(onClick = { onSave(parsed) }, enabled = parsed != null) { Text(stringResource(R.string.save)) } },
         dismissButton = {
             if (clearLabel != null) TextButton(onClick = { onSave(null) }) { Text(clearLabel) }
-            else TextButton(onClick = onDismiss) { Text("Cancel") }
+            else TextButton(onClick = onDismiss) { Text(stringResource(R.string.cancel)) }
         },
     )
 }

gearslip/src/main/java/app/seb3thehacker/gearslip/ui/CertSetupScreen.kt

@@ -1,5 +1,7 @@
 package app.seb3thehacker.gearslip.ui
 
+import androidx.compose.ui.res.stringResource
+import app.seb3thehacker.gearslip.R
 import android.net.Uri
 import androidx.activity.compose.rememberLauncherForActivityResult
 import androidx.activity.result.contract.ActivityResultContracts
@@ -80,7 +82,7 @@ fun CertSetupScreen(onDone: () -> Unit) {
             verticalArrangement = Arrangement.Center,
         ) {
             Text(
-                "Certificate Setup",
+                stringResource(R.string.certsetup_title),
                 style = MaterialTheme.typography.headlineLarge,
                 fontWeight = FontWeight.Bold,
                 color = MaterialTheme.colorScheme.onBackground,
@@ -88,9 +90,9 @@ fun CertSetupScreen(onDone: () -> Unit) {
             Spacer(Modifier.height(8.dp))
             Text(
                 if (installed) {
-                    "Cars accept only Google-issued certificates, and you have one loaded."
+                    stringResource(R.string.certsetup_loaded)
                 } else {
-                    "Cars accept only Google-issued certificates. Gearslip doesn't include one, so choose where yours comes from."
+                    stringResource(R.string.certsetup_choose)
                 },
                 style = MaterialTheme.typography.bodyLarge,
                 textAlign = TextAlign.Center,
@@ -100,14 +102,24 @@ fun CertSetupScreen(onDone: () -> Unit) {
 
             if (installed) {
                 Text(
-                    if (manualProgress) "Certificate imported." else "Certificate installed.",
+                    if (manualProgress) stringResource(R.string.cert_imported) else stringResource(R.string.certsetup_installed),
                     style = MaterialTheme.typography.titleMedium,
                     fontWeight = FontWeight.SemiBold,
                     color = MaterialTheme.colorScheme.primary,
                 )
+                // A downloaded certificate works in most cars, not all: say where to go when it doesn't.
+                if (!manualProgress) {
+                    Text(
+                        stringResource(R.string.certsetup_installed_hint),
+                        style = MaterialTheme.typography.bodyMedium,
+                        textAlign = TextAlign.Center,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                        modifier = Modifier.padding(top = 8.dp),
+                    )
+                }
                 Spacer(Modifier.height(20.dp))
                 Button(onClick = onDone, modifier = Modifier.fillMaxWidth().height(56.dp)) {
-                    Text("Continue")
+                    Text(stringResource(R.string.certsetup_continue))
                 }
                 Spacer(Modifier.height(40.dp))
                 return@Column
@@ -130,11 +142,10 @@ fun CertSetupScreen(onDone: () -> Unit) {
                         },
                         modifier = Modifier.fillMaxWidth().height(56.dp),
                     ) {
-                        Text("Download from aasdk")
+                        Text(stringResource(R.string.cert_download))
                     }
                     Text(
-                        "The open-source aasdk project publishes this certificate at github.com/opencardev/aasdk. " +
-                            "Most cars accept it; some from around 2020 on don't.",
+                        stringResource(R.string.certsetup_aasdk_sub),
                         style = MaterialTheme.typography.bodySmall,
                         textAlign = TextAlign.Center,
                         color = MaterialTheme.colorScheme.onSurfaceVariant,
@@ -146,7 +157,7 @@ fun CertSetupScreen(onDone: () -> Unit) {
                     Box(Modifier.fillMaxWidth().height(56.dp), contentAlignment = Alignment.Center) {
                         DownloadingRow {
                             CircularProgressIndicator(Modifier.size(20.dp), strokeWidth = 2.dp)
-                            Text("Downloading…", style = MaterialTheme.typography.bodyLarge)
+                            Text(stringResource(R.string.cert_downloading), style = MaterialTheme.typography.bodyLarge)
                         }
                     }
                 }
@@ -157,7 +168,7 @@ fun CertSetupScreen(onDone: () -> Unit) {
                     Surface(color = MaterialTheme.colorScheme.errorContainer, shape = MaterialTheme.shapes.medium) {
                         Column(Modifier.fillMaxWidth().padding(16.dp), verticalArrangement = Arrangement.spacedBy(8.dp)) {
                             Text(
-                                "Download failed",
+                                stringResource(R.string.certsetup_failed),
                                 style = MaterialTheme.typography.titleMedium,
                                 fontWeight = FontWeight.SemiBold,
                                 color = MaterialTheme.colorScheme.onErrorContainer,
@@ -168,7 +179,7 @@ fun CertSetupScreen(onDone: () -> Unit) {
                                 color = MaterialTheme.colorScheme.onErrorContainer,
                             )
                             Button(onClick = { downloadState = DownloadState.Idle }, modifier = Modifier.fillMaxWidth()) {
-                                Text("Retry")
+                                Text(stringResource(R.string.certsetup_retry))
                             }
                         }
                     }
@@ -180,9 +191,9 @@ fun CertSetupScreen(onDone: () -> Unit) {
             OutlinedButton(
                 onClick = { importLauncher.launch(arrayOf("*/*")) },
                 modifier = Modifier.fillMaxWidth().height(52.dp),
-            ) { Text("Import my own file") }
+            ) { Text(stringResource(R.string.cert_import)) }
             Text(
-                "A .p12 file with its private key, from wherever you choose.",
+                stringResource(R.string.certsetup_import_sub),
                 style = MaterialTheme.typography.bodySmall,
                 textAlign = TextAlign.Center,
                 color = MaterialTheme.colorScheme.onSurfaceVariant,
@@ -197,7 +208,7 @@ fun CertSetupScreen(onDone: () -> Unit) {
                 },
                 modifier = Modifier.fillMaxWidth().height(52.dp),
             ) {
-                Text("Skip car connection setup")
+                Text(stringResource(R.string.certsetup_skip))
             }
 
             Spacer(Modifier.height(40.dp))
@@ -216,7 +227,7 @@ fun CertSetupScreen(onDone: () -> Unit) {
                         pendingUri = null
                         manualProgress = true
                     }.onFailure {
-                        reportError("Wrong password or not a valid PKCS#12 file with a private key.")
+                        reportError(context.getString(R.string.cert_import_failed))
                     }
                 }
             },
@@ -224,7 +235,7 @@ fun CertSetupScreen(onDone: () -> Unit) {
     }
 }
 
-/** A tight horizontal row for the inline "Downloading…" spinner state. */
+/** A tight horizontal row for the inline stringResource(R.string.cert_downloading) spinner state. */
 @Composable
 private fun DownloadingRow(content: @Composable RowScope.() -> Unit) {
     Row(
@@ -248,20 +259,20 @@ private fun PasswordDialog(onDismiss: () -> Unit, onConfirm: (String, (String) -
 
     AlertDialog(
         onDismissRequest = onDismiss,
-        title = { Text("Certificate password") },
+        title = { Text(stringResource(R.string.cert_password_title)) },
         text = {
             OutlinedTextField(
                 value = password,
                 onValueChange = { password = it; error = null },
                 singleLine = true,
-                label = { Text("Password") },
+                label = { Text(stringResource(R.string.cert_password)) },
                 visualTransformation = PasswordVisualTransformation(),
                 keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Password),
                 isError = error != null,
-                supportingText = { Text(error ?: "Leave empty if the file has none.") },
+                supportingText = { Text(error ?: stringResource(R.string.cert_password_hint)) },
             )
         },
-        confirmButton = { TextButton(onClick = { onConfirm(password) { error = it } }) { Text("Import") } },
-        dismissButton = { TextButton(onClick = onDismiss) { Text("Cancel") } },
+        confirmButton = { TextButton(onClick = { onConfirm(password) { error = it } }) { Text(stringResource(R.string.cert_import_button)) } },
+        dismissButton = { TextButton(onClick = onDismiss) { Text(stringResource(R.string.cancel)) } },
     )
 }

gearslip/src/main/java/app/seb3thehacker/gearslip/ui/CertSummary.kt

@@ -1,5 +1,6 @@
 package app.seb3thehacker.gearslip.ui
 
+import app.seb3thehacker.gearslip.R
 import android.content.Context
 import app.seb3thehacker.gearslip.CertProvider
 import java.text.DateFormat
@@ -28,20 +29,20 @@ data class CertSummary(
             val identity = CertProvider.loadSupplied(context)
                 ?: return CertSummary(
                     CertProvider.Kind.SELF_SIGNED,
-                    "None loaded (self-signed; cars reject it)",
+                    context.getString(R.string.cert_none),
                     null, null, null,
                 )
             val cert = identity.certificate
             val name = friendlyName(cert.subjectX500Principal.name)
-            val prefix = when (identity.kind) {
-                    CertProvider.Kind.IMPORTED -> "Imported"
-                    CertProvider.Kind.DOWNLOADED -> "Downloaded"
-                    CertProvider.Kind.ADB_STAGED -> "Staged over adb"
-                    CertProvider.Kind.SELF_SIGNED -> "Self-signed"
+            val headline = when (identity.kind) {
+                    CertProvider.Kind.IMPORTED -> R.string.cert_kind_imported
+                    CertProvider.Kind.DOWNLOADED -> R.string.cert_kind_downloaded
+                    CertProvider.Kind.ADB_STAGED -> R.string.cert_kind_adb
+                    CertProvider.Kind.SELF_SIGNED -> R.string.cert_kind_self
                 }
             return CertSummary(
                 identity.kind,
-                "$prefix: $name",
+                context.getString(headline, name),
                 cert.subjectX500Principal.name,
                 cert.issuerX500Principal.name,
                 DateFormat.getDateInstance(DateFormat.MEDIUM).format(Date(cert.notAfter.time)),

gearslip/src/main/java/app/seb3thehacker/gearslip/ui/CopyableCommand.kt

@@ -1,5 +1,7 @@
 package app.seb3thehacker.gearslip.ui
 
+import androidx.compose.ui.res.stringResource
+import app.seb3thehacker.gearslip.R
 import android.widget.Toast
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
@@ -29,7 +31,7 @@ fun CopyableCommand(command: String) {
         shape = MaterialTheme.shapes.small,
         onClick = {
             clipboard.setText(AnnotatedString(command))
-            Toast.makeText(context, "Command copied", Toast.LENGTH_SHORT).show()
+            Toast.makeText(context, context.getString(R.string.command_copied), Toast.LENGTH_SHORT).show()
         },
         modifier = Modifier.fillMaxWidth().padding(top = 4.dp),
     ) {
@@ -41,7 +43,7 @@ fun CopyableCommand(command: String) {
                 color = MaterialTheme.colorScheme.onSurface,
             )
             Text(
-                "Tap to copy",
+                stringResource(R.string.command_tap_copy),
                 style = MaterialTheme.typography.labelSmall,
                 color = MaterialTheme.colorScheme.primary,
             )

gearslip/src/main/java/app/seb3thehacker/gearslip/ui/DonatePrompt.kt

@@ -1,5 +1,7 @@
 package app.seb3thehacker.gearslip.ui
 
+import androidx.compose.ui.res.stringResource
+import app.seb3thehacker.gearslip.R
 import android.content.Context
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
@@ -100,31 +102,30 @@ internal fun DonateDialog(live: Boolean) {
     AlertDialog(
         onDismissRequest = { DonatePrompt.answer(context, donated = false) },
         icon = { Icon(Icons.Filled.Favorite, contentDescription = null) },
-        title = { Text("Glad that drive worked") },
+        title = { Text(stringResource(R.string.donate_title)) },
         text = {
             Text(
-                "Gearslip is free, with no ads and no tracking. If it gets you on the road, your " +
-                    "support keeps it going.",
+                stringResource(R.string.donate_body),
             )
         },
         confirmButton = {
             Column(Modifier.fillMaxWidth(), verticalArrangement = Arrangement.spacedBy(8.dp)) {
                 Button(onClick = { give(GearslipLinks.LIBERAPAY) }, Modifier.fillMaxWidth()) {
-                    Text("Support on Liberapay")
+                    Text(stringResource(R.string.donate_liberapay))
                 }
                 OutlinedButton(onClick = { give(GearslipLinks.BUY_ME_A_COFFEE) }, Modifier.fillMaxWidth()) {
-                    Text("Buy me a coffee")
+                    Text(stringResource(R.string.donate_bmac))
                 }
                 if (GearslipLinks.PAYMENT_LINK.isNotEmpty()) {
                     OutlinedButton(onClick = { give(GearslipLinks.PAYMENT_LINK) }, Modifier.fillMaxWidth()) {
-                        Text("Give once by card")
+                        Text(stringResource(R.string.donate_card))
                     }
                 }
                 OutlinedButton(onClick = { monero = true }, Modifier.fillMaxWidth()) {
                     Text("Monero")
                 }
                 TextButton(onClick = { DonatePrompt.answer(context, donated = false) }, Modifier.fillMaxWidth()) {
-                    Text("Not now")
+                    Text(stringResource(R.string.worked_not_now))
                 }
             }
         },