App 2.45.1: Halloween's song flies across the sky on a bat's banner

Instead of a line at the foot of the hill, a bat tows a parchment
banner with the title and artist through the sky above the sign.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LhzAVaUyqcw5PkGjz4mWW6

.claude/skills/car-logs/SKILL.md

@@ -71,9 +71,25 @@ services by name (2.42.1 on; 2.42.0 also connected to them, which stopped the mu
 session is `com.allgo.remoteui.mediabrowserservice`, Bluetooth's `com.android.bluetooth`. Ask what was playing
 when the check ran.
 
+## Sound checks
+
+`fetch-logs` also brings `sound-probe-YYYYMMDD-HHMMSS.txt` (Logs tab, "Check sound",
+`SoundProbe`, 2.43.3 on): permissions, which session plays, then one line a second of the audio
+analyser's peak, bass, mid, treble and rms, and a result line. Levels only, no sound. The peak has
+to move for music to count as heard. Ask what was playing when the check ran, and whether the
+music kept playing and any prompt came up.
+
+## Update checks
+
+`fetch-logs` also brings `update-check-YYYYMMDD-HHMMSS.txt` (each Settings → Check for updates,
+`UpdateHook`, 2.43.5 on): the networks Android sees, whether the server's name resolves, the
+result and, on a failure, whether `www.gstatic.com/generate_204` answers (204: the internet
+works, so look at the server). A report written offline arrives once the car is back online, or
+is on a USB stick that was plugged in.
+
 ## Rules
 
 - Recordings and checks are the car's data: `logs/`, `/signal-recording-*.txt` and
-  `/media-probe-*.txt` are gitignored. Never
+  `/media-probe-*.txt`, `/sound-probe-*.txt`, `/update-check-*.txt` are gitignored. Never
   commit, publish or upload them anywhere.
 - Findings that change what the project knows go into a `SPECS.md` done-log entry, as usual.

.gitignore

@@ -46,3 +46,5 @@ mise.local.toml
 /logs/
 /signal-recording-*.txt
 /media-probe-*.txt
+/sound-probe-*.txt
+/update-check-*.txt

AGENTS.md

@@ -77,12 +77,12 @@ Repository: `ssh://git@git.stinnesbeck.com:2222/nils/mg4.git` (remote `origin`),
 
 | Tab | Contents |
 |---|---|
-| Overview | value tiles (battery, range, range/usage/energy since start, 5-min averages of range, usage, power, speed), vehicle info (odometer, lease allowance and the odometer against it), tyre pressures; read every 0.2 s on a background thread. Styles (Settings → Overview style): Tiles, Gauges (`GaugeView` needles), Cockpit (`RingView` rings, `TraceView` power trace), Retro (`RetroView`, seven-segment VFD), Futuristic (`FlowView`, animated energy flow), Sci-fi (`SciFiView`, starship console), Cartoon (`CartoonView`), MG (`OctagonView`, octagonal dials after the classic MG dashboards), and on `ClusterCanvasView`: Minimal, Terminal, Nixie tubes, Chronograph, Grid (`GridView`, neon lines over a moving grid floor, power as a light-cycle trail from `ClusterValues.powerTrail`), Grid with map (the same `GridView` over the roads round the car, top-down: GPS while it is shown, tiles from the server's `/v1/map/roads` through `MapRoads`, cached in `files/map`; `RoadTile`, `MapGeometry`; the map is `MapLayerView`, a hardware layer drawn once and moved and turned by the GPU every display frame), Time circuits (`TimeCircuitsView`, the time machine's LED rows with `Segments14` letters and a flux capacitor), Quest (`QuestView`, a fantasy game interface), Visor (`VisorView`, a helmet display with a motion tracker of the power trail), Empire (`EmpireView`, a strategy game with an isometric world and ages by odometer, `EmpireAge`); the drawn styles share `ClusterValues`. A style shown in its own palette (Sci-fi, Cartoon, Nixie, Time circuits, Quest, Empire; Retro, Terminal, Grid and Visor with "Original") gives the whole app its colours (`StylePalette`, `res/values/style_palettes.xml`) instead of the accent colour. A button in the navigation's header hides the navigation for a full-width Overview (`PREF_OVERVIEW_FULLSCREEN`); a swipe in from the left edge (`EdgeSwipe`) brings it back; without the app's own full screen the car's sidebar takes that edge, so a tab at the left edge (`edge_tab`) is tapped or swiped instead. Pages change only by the navigation (the pager's own swiping is off) |
+| Overview | value tiles (battery, range, range/usage/energy since start, 5-min averages of range, usage, power, speed, and under the battery what plays: `NowPlaying` picks from the media sessions `NowPlayingWatcher` follows — listened to only, never connected to, nothing logged or sent; Tiles and Halloween, Settings → "Show what's playing", `PREF_NOW_PLAYING`, on by default), vehicle info (odometer, lease allowance and the odometer against it), tyre pressures; read every 0.2 s on a background thread. Styles (Settings → Overview style): Tiles, Gauges (`GaugeView` needles), Cockpit (`RingView` rings, `TraceView` power trace), Retro (`RetroView`, seven-segment VFD), Futuristic (`FlowView`, animated energy flow), Sci-fi (`SciFiView`, starship console), Cartoon (`CartoonView`), MG (`OctagonView`, octagonal dials after the classic MG dashboards), and on `ClusterCanvasView`: Minimal, Terminal, Nixie tubes, Chronograph, Grid (`GridView`, neon lines over a moving grid floor, power as a light-cycle trail from `ClusterValues.powerTrail`), Grid with map (the same `GridView` over the roads round the car, top-down: GPS while it is shown, tiles from the server's `/v1/map/roads` through `MapRoads`, cached in `files/map`; `RoadTile`, `MapGeometry`; the map is `MapLayerView`, a hardware layer drawn once and moved and turned by the GPU every display frame), Time circuits (`TimeCircuitsView`, the time machine's LED rows with `Segments14` letters and a flux capacitor), Quest (`QuestView`, a fantasy game interface), Visor (`VisorView`, a helmet display with a motion tracker of the power trail), Empire (`EmpireView`, a strategy game with an isometric world and ages by odometer, `EmpireAge`), Día de Muertos (`MuertosView`, an ofrenda: papel picado, candles, a calavera in a ring of marigolds), Halloween (`HalloweenView`, a jack-o'-lantern, a potion flask, a tombstone on a graveyard hill), both counting with `Tally`, the pumpkin's light flaring on the kick drum while on screen, when "Pumpkin light follows the music" is on (off by default, `PREF_MUSIC_LIGHT`; `MusicTap`, `MusicPulse`: Android's audio analyser, 40–120 Hz, jumps not levels; Bluetooth and CarPlay, not the radio); the drawn styles share `ClusterValues`. A style shown in its own palette (Sci-fi, Cartoon, Nixie, Time circuits, Quest, Empire, Día de Muertos, Halloween; Retro, Terminal, Grid and Visor with "Original") gives the whole app its colours (`StylePalette`, `res/values/style_palettes.xml`) instead of the accent colour. A button in the navigation's header hides the navigation for a full-width Overview (`PREF_OVERVIEW_FULLSCREEN`); a swipe in from the left edge (`EdgeSwipe`) brings it back; without the app's own full screen the car's sidebar takes that edge, so a tab at the left edge (`edge_tab`) is tapped or swiped instead. Pages change only by the navigation (the pager's own swiping is off) |
 | Consumption / Charging | period totals, daily log, charging sessions and curve |
 | Live data | on/off, ABRP API key and user token, upload frequency |
 | Server | URL, pairing by QR, ingest token, installation ID (read-only), config import |
 | Settings | drive mode (Eco, Normal, Sport, Snow, Custom; the lit one is what the car reports; changes only in P at a standstill, `DriveModeWrite`; "Set at start" sets the last confirmed choice again when the service starts with the head unit), full screen, voice key, Overview style with the accent colour beside it (offered only for styles drawn in it, `OverviewStyle.usesAccent`; Retro, Terminal, Grid (and Grid with map, sharing Grid's choice) and Visor add "Original" for their own palette, `hasOriginal`), tyre unit, battery and charging price (one card on wide screens), version, update check, install from USB, About |
-| Logs | signal recorder (`SignalRecorder`/`SignalRecording`: every property and vendor getter via `VendorSurfaceProbe.capture`, again and again for 3 minutes, plus change events of the driver-assistance block it subscribes to, `EVHardware.listenToProperties` with `AssistBlock`, and steering-wheel key broadcasts; lists what changed, rarest first; saved to the app, a USB stick and the server, through `LogOutbox`, which sends it again later when the car is offline; how to find where the car publishes something), music-sources check (`MediaProbe`: audio players and the active media sessions, CarPlay's and Bluetooth's among them, with their song, and the media browser services by name — never connected to: binding them stopped the music in 2.42.0; saved and sent like a recording), update log (every install step, with the platform's words), upload log |
+| Logs | signal recorder (`SignalRecorder`/`SignalRecording`: every property and vendor getter via `VendorSurfaceProbe.capture`, again and again for 3 minutes, plus change events of the driver-assistance block it subscribes to, `EVHardware.listenToProperties` with `AssistBlock`, and steering-wheel key broadcasts; lists what changed, rarest first; saved to the app, a USB stick and the server, through `LogOutbox`, which sends it again later when the car is offline; how to find where the car publishes something), music-sources check (`MediaProbe`: audio players and the active media sessions, CarPlay's and Bluetooth's among them, with their song, and the media browser services by name — never connected to: binding them stopped the music in 2.42.0; saved and sent like a recording), sound check (`SoundProbe`, `SoundLevels`: on a tap, 10 seconds of levels from Android's audio analyser, to learn whether it hears what plays; saved and sent like a recording), update log (every check and install step, with the platform's words; a check also writes down the networks, the server's name lookup and, when it fails, an internet test, `UpdateNetworkCheck`, `UpdateDiagnosis`, and saves a report like a recording), upload log |
 
 Key classes (`app/src/main/java/com/evsuite/abrp/`): `AbrpUploadService` (foreground service,
 15 s tick), `TelemetryUploader` (+ `TelemetryQueue`, persisted), `TelemetryPayload` (server

OTA.md

@@ -89,7 +89,11 @@ platform's own words, is on the Logs tab under "Updates".
 | `Installation failed: INSTALL_FAILED_… The APK is in Downloads.` | The package manager's own words. A signature error means the APK was not signed by `build-car`. |
 | `… is in Downloads — tap the file to install` | A session could not start; install from Downloads by hand. |
 
-On the car's Logs tab, or with a cable: `adb logcat -s EVABRP.Update OtaUpdater`.
+On the car's Logs tab, or with a cable: `adb logcat -s EVABRP.Update OtaUpdater`. Each check
+writes down the networks Android sees, whether the server's name resolves, its result and, when
+it fails, whether `www.gstatic.com/generate_204` answers, which tells a SIM without data from a
+server that is down. That report also goes to a USB stick and, once online, to the server
+(`update-check-*.txt`, read with `fetch-logs`). No address or token is written.
 
 ## Why a PackageInstaller session, not `pm install`
 

README.md

@@ -39,7 +39,7 @@ APIs.
 
 ## Screenshots
 
-**Overview styles:** the Overview comes in eighteen looks, from an 80s fluorescent display to a
+**Overview styles:** the Overview comes in twenty looks, from an 80s fluorescent display to a
 starship console, a watch face, a neon grid (also over a map of the roads round the car), a time machine, a fantasy game, a helmet display and a strategy game. [THEMES.md](THEMES.md) shows each one, with and without the
 navigation, and what inspired it.
 
@@ -89,7 +89,7 @@ with the server using a token of its own, obtained by pairing with a phone (belo
 
 | Tab | What it shows |
 |---|---|
-| **Overview** | Battery, range, power and speed; range, usage and energy since start; 5-minute averages of range, usage, power and speed; vehicle info (odometer, lease allowance, climate setpoint) and tyre pressures. Read five times a second. Looks to choose from in Settings → Overview style: Tiles, Gauges, Cockpit, Retro, Futuristic, Sci-fi, Cartoon, MG, Minimal, Terminal, Nixie tubes, Chronograph, Grid, Grid with map, Time circuits, Quest, Visor and Empire ([THEMES.md](THEMES.md) shows them all). A style with its own colours (Sci-fi, Cartoon, Nixie tubes, Time circuits, Quest, Empire, and Retro, Terminal, Grid and Visor with "Original") colours the whole app to match, e.g. turquoise for Retro. Grid with map lays the roads round the car on the Grid's floor: the app asks the car's server for the map tile it is in (not its position), the server fetches only that tile from OpenFreeMap's OpenStreetMap vector tiles and keeps it, and the GPS runs for it only while that style is on screen. The small button next to the MG4 logo in the navigation hides the navigation for a full-width Overview; swipe in from the left edge (a faint handle marks it) to bring it back; with Settings → Full screen off, the car's own sidebar sits at that edge, so tap the small tab at the left edge (›) instead. Pages change only by the navigation, not by swiping sideways |
+| **Overview** | Battery, range, power and speed; range, usage and energy since start; 5-minute averages of range, usage, power and speed; vehicle info (odometer, lease allowance, climate setpoint) and tyre pressures. While music plays (Bluetooth, CarPlay or the radio), the title and artist; they stay on the screen and are never sent. Read five times a second. Looks to choose from in Settings → Overview style: Tiles, Gauges, Cockpit, Retro, Futuristic, Sci-fi, Cartoon, MG, Minimal, Terminal, Nixie tubes, Chronograph, Grid, Grid with map, Time circuits, Quest, Visor and Empire ([THEMES.md](THEMES.md) shows them all). A style with its own colours (Sci-fi, Cartoon, Nixie tubes, Time circuits, Quest, Empire, and Retro, Terminal, Grid and Visor with "Original") colours the whole app to match, e.g. turquoise for Retro. Grid with map lays the roads round the car on the Grid's floor: the app asks the car's server for the map tile it is in (not its position), the server fetches only that tile from OpenFreeMap's OpenStreetMap vector tiles and keeps it, and the GPS runs for it only while that style is on screen. The small button next to the MG4 logo in the navigation hides the navigation for a full-width Overview; swipe in from the left edge (a faint handle marks it) to bring it back; with Settings → Full screen off, the car's own sidebar sits at that edge, so tap the small tab at the left edge (›) instead. Pages change only by the navigation, not by swiping sideways |
 | **Consumption** | Lifetime, last 7 and 30 days, Trip A and B (distance, energy, average consumption and speed, SOC change), and a daily log of the last four months |
 | **Charging** | The current session (SOC, voltage, current, power, energy into the battery and from the grid, time, cost) and its SOC/power curve |
 | **Live data** | Live data on/off, ABRP credentials for sending directly from the car, upload frequency |

SPECS.md

@@ -140,6 +140,40 @@ tyre pressures, GPS (lat, lon, elevation, heading) and the is_* flags. It does *
   confirmed car facts, app structure, UI conventions, build/test/ship, documents. It replaces
   upstream's EVABRPUploader text. The test emulator is now in the flake: `nix run .#car-emulator`
   (Android 9 AOSP at 1920×720, 160 dpi; the car build installs as the system user — checked).
+- 2026-11-02 — App 2.45.1: **Halloween's song flies through the sky** (owner: "Instead of taking up screen space on the bottom, can we somehow include the title in the theme itself? ... have text fly through the air"). A bat tows a parchment banner with "♪ title — artist" from left to right across the strip of sky above the sign, behind the moon, one pass about every half minute, again and again while something plays (the title is cut first so the artist stays); the line at the foot of the hill is gone. While a banner flies the view draws about 30 frames a second, as it does while driving. Tested: emulator with the throwaway fake session (banner clear of the sign along the whole pass), unit tests, lint. Not tried on the car.
+- 2026-11-02 — App 2.45.0 published (`car-2.45.0`).
+- 2026-11-02 — App 2.45.0: **now playing on the Overview** (owner: "can we also implement music titles etc in our app?"; display only, Tiles and Halloween first). `NowPlayingWatcher` follows the active media sessions as the music-sources check reads them (`MediaSessionManager`, MEDIA_CONTENT_CONTROL as the system user), with a change listener and a callback per session, so reading costs no call into another app; it never connects to a media browser service (2.42.0) and sends no command. It runs only while the Overview is on screen in Tiles or Halloween with Settings → "Show what's playing" on (**on by default**, `PREF_NOW_PLAYING`). `NowPlaying` (pure, unit-tested) picks the session that plays, the one updated last of several, else the one paused last, passing over sessions without text (Bluetooth's empty one); CarPlay's YouTube titles lose their `[videoID]`; the radio shows its text (the artist field, e.g. "BLIND MELON - NO RAIN") with the station below. Tiles: the empty slot under the battery shows source ("· paused" when paused), title, artist, a cover (the session's picture, or Bluetooth's `ALBUM_ART_URI` file, read small off the main thread) and how far the song is; invisible when nothing plays; the narrow layout has no room and shows none. Halloween: "♪ title — artist" along the foot of the hill, the title cut first. Titles stay on screen: not logged, not sent. Tested: unit tests, lint, emulator with a throwaway build publishing a fake session (CarPlay-like title with ID removed, cover, bar; Halloween line; the switch hides and brings back both). With Halloween chosen the Settings card has two switches more and scrolls further. Not tried on the car: whether the car's sessions, Bluetooth's cover file and the radio text show as in the music-sources checks.
+- 2026-11-02 — App 2.44.0 published (`car-2.44.0`).
+- 2026-11-02 — App 2.44.0: **the pumpkin light follows the bass, and only when switched on** (owner: "more focussed on the bass", "optional via a settings flag"). `MusicPulse` now reads the kick drum's band (40–120 Hz, was 20–250 Hz) and lights only on a jump since the last reading, against the biggest jumps of the last 4 s; a jump under a fifth of that, or under half the bass's average level, lights nothing. So kicks flash, and a held note, a wobbling bass line or a swelling note stay dark (unit tests with made-up patterns). It flares at once and falls in 0.2 s. New switch under the Overview style, shown only for Halloween: "Pumpkin light follows the music" (`PREF_MUSIC_LIGHT`), **off by default**; off, the analyser never starts. Tuned on made-up signals only: no Bluetooth or CarPlay sound report from the car has arrived yet. Next: now playing (title, artist, source) from the media sessions, in its own version. Tested: unit tests, lint, emulator (switch off by default and the analyser thread absent; on, it runs only on the Overview; a throwaway build playing a pulsing test tone: the glow flares with the switch on, and stays exactly still with it off). With Halloween chosen, the Settings card now scrolls a little to reach the tyre unit. Not tried on the car.
+- 2026-11-01 — App 2.43.5 published (`car-2.43.5`).
+- 2026-11-01 — App 2.43.5: **update checks log what happens** (`UpdateNetworkCheck`, `UpdateDiagnosis`; owner: updating from the car fails, "Can we log what happens? Maybe my SIM card has no data left"). Each check on Settings writes to the Logs tab: the networks Android sees (type, in use, internet, validated, roaming), whether the server's name resolves, how a failure happened, in words from its type or status only, and how many reports wait. On a failure it also asks `https://www.gstatic.com/generate_204`, the one request to anyone but the car server, to tell no data from a server that is down. A report goes to a USB stick and, when online, the server (`update-check-*.txt`; only the newest waits, so it cannot push out a recording). A check at start logs only a failure. The update log keeps 40 lines, not 10. An out-of-data SIM would also explain why the Bluetooth and CarPlay sound reports did not arrive; not confirmed. Tested: unit tests, lint, emulator with a fake server (online: the name fails, the internet test says it works; airplane mode: both fail, "none in use"; the real build installs and starts, its check not run there, having no server). Not tried on the car.
+- 2026-11-01 — App 2.43.4 published (`car-2.43.4`).
+- 2026-11-01 — App 2.43.4: **the Halloween pumpkin's light follows the music** (`MusicTap`, `MusicPulse`; owner: "make the light in the pumpkin react to the equalizer/sound of the music"). The bass, 25 times a second off the main thread, drives the glow and brightens the carving on the beat; yellow and green still mean drawing and regenerating, the embers still the power, and no signal leaves the light as it was. It listens only with the app in front, on the Overview, in Halloween. The owner reports the sound check worked with Bluetooth and CarPlay; those two reports never reached the server (why not is unexplained), so their levels are unseen and the pulse's feel is untuned for the car. Tested: unit tests, lint, emulator (a tone already playing when the analyser starts: the carving and glow move with it; no sound: unchanged; the analyser is released on another tab and when the app leaves the front; no crash). Not tried on the car; how it looks there, and its effect on the head unit over a long drive, are unknown.
+- 2026-10-31 — Sound check on the car (2.43.3), radio: `com.saicmotor.radio` playing, `isMusicActive` false, analyser enabled without error and silent for all 10 seconds (peak 0.00, -9600 mB). The audio analyser does not hear the radio. The owner ran Bluetooth and CarPlay too; those reports have not reached the server yet (the outbox sends oldest first and stops at the first failure, retrying while the service runs).
+- 2026-10-31 — App 2.43.3 published (`car-2.43.3`).
+- 2026-10-31 — Music checks from the car: the radio publishes a session while it plays (`com.saicmotor.radio`, 29 October, DAB: TITLE the station, ARTIST the programme text, AUTHOR the band), with `isMusicActive` false, so its sound may not pass through Android's mix and the audio analyser may not hear it. The sound check with the radio playing will tell. CarPlay playing (31 October, 2.43.2) has `isMusicActive` true, like Bluetooth on 28 October. The sound check itself has not run on the car yet: 2.43.3 was not published and those reports came from 2.43.2's music-sources check.
+- 2026-10-31 — App 2.43.3: **sound check** on the Logs tab (`SoundProbe`, `SoundLevels`), asked for before the Halloween pumpkin's light follows the music (owner: "make the light in the pumpkin react to the equalizer/sound of the music"). One tap: 10 seconds of levels from `Visualizer` on session 0 (peak, bass, mid, treble, rms), saved and sent like a recording; no sound kept, no microphone. New in the car build's manifest: RECORD_AUDIO and MODIFY_AUDIO_SETTINGS. Grounds for trying: Bluetooth played with `isMusicActive` true (28 October check), `libCarPlayPlatformAudio.so` uses AudioTrack and no direct PCM. Whether the analyser hears anything on the car is what this is to find out. Tested: unit tests, lint, emulator (silence says nothing was playing; a pulsing 110 Hz + 1 kHz test tone from another app is heard, peak 0.27–0.91, bass strongest, the tone kept playing, no prompt, no crash). Not tried on the car.
+- 2026-10-31 — App 2.43.2 published (`car-2.43.2`).
+- 2026-10-31 — App 2.43.2: Halloween's teeth are triangles hanging from the grin's upper lip, each in the colour of the rib behind it (the right one was the darker orange on the lighter rib; owner: "the color on the right side is off"). Two screenshots redone. Tested: unit tests, lint, emulator with sample values (drawing in panel and full screen, regenerating in full screen) and with no data. Not tried on the car.
+- 2026-10-31 — App 2.43.1 published (`car-2.43.1`).
+- 2026-10-31 — App 2.43.1: Halloween's bats can be seen. They were near-black and small on the darkest part of the sky, and the owner did not spot them; now a moonlit purple-grey with a light edge, a third larger. Two screenshots redone. Tested: unit tests, lint, emulator with sample values (panel and full screen) and with no data (no bats). Not tried on the car.
+- 2026-10-31 — App 2.43.0 published (`car-2.43.0`).
+- 2026-10-31 — App 2.43.0: Overview styles **Día de Muertos** (`MuertosView`) and **Halloween**
+  (`HalloweenView`; owner: "let's design a 'dia de muertos' and a 'halloween' style"), each with
+  its own palette (the papel picado's pink, the pumpkin's orange). Día de Muertos, an ofrenda and
+  kept a celebration: papel picado = battery (one flag per 10 %), calavera with the speed on its
+  forehead, a ring of marigolds = power (turquoise and anticlockwise regenerating), candles =
+  range (one per 50 km), a path of petals = the last two minutes of power. Halloween: a
+  jack-o'-lantern with the speed in its grin, burning yellow or, regenerating, green; an arch of
+  embers = power; a potion flask = battery; a tombstone and bats = range; the hill = the last two
+  minutes of power. What a value lights is `Tally` (pure, unit-tested: an unread value lights
+  nothing). The static scene is drawn once per size into a bitmap (about 4.5 MB while the view is
+  attached), so a frame only draws the readings; flags, flames, bats, bubbles and the ghost move
+  only while the car moves. Tests and lint pass. Emulator with sample values, panel and full
+  screen: normal, 12 % with regeneration, 40 % (the flask's words over the potion's surface); real
+  build with no data: "—" and nothing lit. No crash of the app. Not tried on the car, so the frame
+  rate on the head unit is unmeasured.
+- 2026-10-28 — App 2.42.1 published (`car-2.42.1`).
 - 2026-10-28 — App 2.42.1: **the music-sources check no longer connects to other apps' media
   services.** In the car, 2.42.0's check (14:26, Bluetooth music playing) made the head unit ask
   whether to allow access to media (the owner agreed) and **stopped the Bluetooth music**: it

THEMES.md

@@ -1,6 +1,6 @@
 # Overview styles
 
-The Overview can look eighteen ways: pick one under **Settings → Overview style**. Every style shows
+The Overview can look twenty ways: pick one under **Settings → Overview style**. Every style shows
 the same readings (battery, range, power, speed, gear, usage, trip, climate, odometer, time) and
 shows "—" for anything the car did not answer, never a made-up zero.
 
@@ -11,7 +11,7 @@ emulator has no car; on the car the values are live.
 
 **Colours.** Most styles are drawn in the accent colour you pick from the MG4 paints (Settings →
 Accent colour; shown here in Dynamic Red). Retro, Terminal, Grid (with or without the map) and Visor can also show their original
-colours, and Sci-fi, Cartoon, Nixie tubes, Time circuits, Quest and Empire always do; while one of those is shown, the whole app
+colours, and Sci-fi, Cartoon, Nixie tubes, Time circuits, Quest, Empire, Día de Muertos and Halloween always do; while one of those is shown, the whole app
 (navigation, buttons, switches) takes on its colours too.
 
 | Style | Look | Colours |
@@ -34,13 +34,17 @@ colours, and Sci-fi, Cartoon, Nixie tubes, Time circuits, Quest and Empire alway
 | [Quest](#quest) | a fantasy game's interface | own |
 | [Visor](#visor) | a soldier's helmet display | original or accent |
 | [Empire](#empire) | a strategy game's interface | own |
+| [Día de Muertos](#día-de-muertos) | an ofrenda with papel picado and a calavera | own |
+| [Halloween](#halloween) | a jack-o'-lantern on a graveyard hill | own |
 
 ## Tiles
 
 The app's original look, from the design it was forked from: glass cards on OLED black, one tile
 per value, with the averages over the last five minutes and since the start, vehicle info (with
 the lease allowance) and the tyre pressures on a little top view of the car. The most
-information on one screen.
+information on one screen. While something plays over Bluetooth, CarPlay or the radio, the slot
+under the battery shows it: the source, title, artist, a cover when Bluetooth sends one, and how
+far the song is (Settings → "Show what's playing", on by default).
 
 ![Tiles with the navigation](screenshots/themes/tiles-panel.png)
 ![Tiles, full screen](screenshots/themes/tiles.png)
@@ -233,3 +237,39 @@ stats, and a diamond minimap with the odometer and the way to the next age. Belo
 
 ![Empire with the navigation](screenshots/themes/empire-panel.png)
 ![Empire, full screen](screenshots/themes/empire.png)
+
+## Día de Muertos
+
+After the ofrenda, the altar families in Mexico build to welcome their dead back for a visit: a
+celebration, so bright and warm rather than frightening. The papel picado across the top is the
+battery, one cut-paper flag per 10 %, those not lit hanging dark, turning red with "BATTERY LOW"
+below 20 %. The calavera in the middle, a decorated sugar skull with marigolds (cempasúchil) for
+eyes, has the speed on its forehead; the ring of marigolds round it is the power, clockwise while
+drawing, turquoise and anticlockwise while regenerating. The altar's candles are the range, one
+per 50 km. The path of marigold petals along the bottom, which in the tradition leads the visitors
+home, is the last two minutes of power. On the right the clock in a tin frame, P R N D as small
+marigolds, and trip, usage, climate and odometer on the altar cloth. While you drive the flags
+sway and the flames flicker. The app turns the papel picado's pink with it.
+
+![Día de Muertos with the navigation](screenshots/themes/muertos-panel.png)
+![Día de Muertos, full screen](screenshots/themes/muertos.png)
+
+## Halloween
+
+A graveyard hill under a full moon. The jack-o'-lantern has the speed cut into its grin, and its
+carving burns candle yellow while drawing and witch-fire green while regenerating; the arch of
+embers over it is the power, from the left while drawing and from the right while regenerating.
+The potion flask is the battery, red with "BATTERY LOW" blinking below 20 %. The tombstone reads
+the range ("here lies … km"), and the bats are the range too, one per 50 km; P R N D are small
+gravestones, the one engaged lit. The moon holds the clock, a sign hanging from a cobweb has trip,
+usage, climate and odometer, and the hill along the bottom is the last two minutes of power. While
+you drive the bats fly, the potion bubbles and the ghost floats (where there is room for it, as on
+this screen). With "Pumpkin light follows the music" on (Settings, shown with this style; off by
+default) and Bluetooth or CarPlay music playing, the pumpkin's glow flares and its carving
+brightens on each kick drum; the radio cannot be heard, so it burns as usual then. What plays
+(Bluetooth, CarPlay or the radio) flies across the top of the sky on a parchment banner that a
+bat tows, behind the moon, again and again while it plays. The app turns the
+pumpkin's orange with it.
+
+![Halloween with the navigation](screenshots/themes/halloween-panel.png)
+![Halloween, full screen](screenshots/themes/halloween.png)

app/build.gradle

@@ -34,8 +34,8 @@ android {
         applicationId "com.stinnesbeck.nilsmg4"
         minSdk 27
         targetSdk 36
-        versionCode 152
+        versionCode 161
-        versionName "2.42.1"
+        versionName "2.45.1"
 
         // Nothing about the server ships in the APK: its URL and ingest token are entered in
         // the app's Server tab (ServerConfig), and the database is only reachable by the server.

app/src/main/java/com/evsuite/abrp/ClusterValues.java

@@ -23,4 +23,6 @@ final class ClusterValues {
     String tyreFl = "—", tyreFr = "—", tyreRl = "—", tyreRr = "—";
     /** Battery power over the last two minutes, oldest first, NaN where unread; null before any. */
     float[] powerTrail;
+    /** What plays ({@link NowPlaying}): the title, null when nothing does or it is off, and the artist or null. */
+    String songTitle, songArtist;
 }

app/src/main/java/com/evsuite/abrp/HalloweenView.java

@@ -0,0 +1,623 @@
+package com.evsuite.abrp;
+
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.graphics.LinearGradient;
+import android.graphics.Paint;
+import android.graphics.Path;
+import android.graphics.RadialGradient;
+import android.graphics.RectF;
+import android.graphics.Shader;
+import android.graphics.Typeface;
+import android.os.SystemClock;
+
+import java.util.Locale;
+
+/**
+ * The Halloween Overview style: a graveyard hill under a full moon.
+ *
+ * In the middle a jack-o'-lantern with the speed cut into its grin; its carving burns candle yellow
+ * while drawing and witch-fire green while regenerating, and the arch of embers over it is the
+ * power, left to right while drawing, green and right to left while regenerating. On the left a
+ * potion flask: the battery, red with "BATTERY LOW" blinking below 20 %, under a sign hanging from
+ * a cobweb with trip, usage, climate and odometer. On the right the moon holds the clock, and a
+ * tombstone reads the range ("here lies … km"); P R N D are four small gravestones, the one engaged
+ * lit. The bats are the range too, one per 50 km. The hill along the bottom is the last two minutes
+ * of power, rising with it, in orange or, where it regenerated, green. Unread values show "—" and
+ * light nothing. With music playing, the pumpkin's glow swells and its carving brightens on the
+ * beat ({@link MusicTap}); colours and the embers keep their meaning, and with no music it burns as
+ * before. What plays flies across the sky on a banner a bat tows ({@link NowPlaying}).
+ *
+ * The night sky is drawn once into a bitmap per size; only the rest goes over it. Bats, bubbles and
+ * the ghost move (about 30 frames a second) only while the car moves and the view is on screen;
+ * the light's pulse keeps it drawing while there is one.
+ */
+final class HalloweenView extends ClusterCanvasView {
+
+    private static final int EMBERS = 25, BATS = 8;
+    private static final int SKY_TOP = 0xFF0B0620, SKY_LOW = 0xFF2A1140, HILL = 0xFF0A0612;
+    private static final int PUMPKIN = 0xFFF2760F, PUMPKIN_DARK = 0xFFB84A06, PUMPKIN_LIT = 0xFFFF9A2E;
+    private static final int CANDLE = 0xFFFFD84A, FIRE = 0xFF6BFF5A, RED = 0xFFFF3B30, STONE = 0xFF6C6A78;
+    private static final int STONE_DARK = 0xFF3E3C4A, MOON = 0xFFF4E9B8, MOON_SHADE = 0xFFD8C98C;
+    private static final int POTION = 0xFF7BF03A, GLASS = 0xFFB9D8D0, BONE = 0xFFF2EAD8, ORANGE = 0xFFFF8C1A;
+    private static final int STEM = 0xFF4E7A2B, WOOD = 0xFF2E1B10, INK = 0xFF140A08;
+    private static final int BAT = 0xFF6F6390, BAT_EDGE = 0xFFD6CCEA;
+
+    private final Paint fill = new Paint(Paint.ANTI_ALIAS_FLAG);
+    private final Paint line = new Paint(Paint.ANTI_ALIAS_FLAG);
+    private final Paint text = new Paint(Paint.ANTI_ALIAS_FLAG);
+    private final Paint image = new Paint(Paint.FILTER_BITMAP_FLAG);
+    private final Paint glow = new Paint(Paint.ANTI_ALIAS_FLAG);
+    private final Path path = new Path();
+    private final RectF r = new RectF();
+    private final Typeface serif = Typeface.create("serif", Typeface.BOLD);
+    private final Typeface face = Typeface.create("sans-serif-condensed", Typeface.BOLD);
+    private final Typeface thin = Typeface.create("sans-serif-condensed", Typeface.NORMAL);
+
+    private Bitmap sky;
+    private int skyW, skyH;
+    private float time;
+    private long lastFrame;
+    private MusicTap music;
+
+    HalloweenView(Context context) {
+        super(context);
+        line.setStyle(Paint.Style.STROKE);
+        line.setStrokeCap(Paint.Cap.ROUND);
+    }
+
+    /** Where the pumpkin's light hears the music; without it, the light does not follow any. */
+    void setMusic(MusicTap tap) {
+        music = tap;
+    }
+
+    @Override
+    protected void onDetachedFromWindow() {
+        super.onDetachedFromWindow();
+        sky = null;
+        skyW = 0;
+    }
+
+    @Override
+    protected void onDraw(Canvas c) {
+        super.onDraw(c);
+        int w = getWidth(), h = getHeight();
+        if (w <= 0 || h <= 0) return;
+        float u = Math.min(h / 640f, w / 1100f);
+        boolean moving = v.speedKmh != null && v.speedKmh > 0.5f;
+        if (moving) {
+            long now = SystemClock.uptimeMillis();
+            time += lastFrame == 0 ? 0f : Math.min(0.2f, (now - lastFrame) / 1000f);
+            lastFrame = now;
+        } else {
+            lastFrame = 0;
+        }
+        if (sky == null || skyW != w || skyH != h) buildSky(w, h, u);
+        c.drawBitmap(sky, 0, 0, image);
+        drawBats(c, w, u);
+        boolean song = drawSong(c, w, u);
+        drawMoon(c, w, u);
+        drawGhost(c, w, u);
+        drawHill(c, w, h, u);
+        drawEmbers(c, w, u);
+        float pulse = music == null ? 0f : music.pulse();
+        drawPumpkin(c, w, u, pulse);
+        drawSign(c, u);
+        drawFlask(c, u);
+        drawTombstone(c, w, u);
+        drawGears(c, w, u);
+        keepAnimating(moving || pulse > 0f || song, 33);
+    }
+
+    private void label(Canvas c, String s, float x, float y, float size, int colour, Typeface tf, Paint.Align a) {
+        text.setTypeface(tf);
+        text.setTextSize(size);
+        text.setTextAlign(a);
+        text.setColor(colour);
+        c.drawText(s, x, y, text);
+    }
+
+    private boolean regen() {
+        return v.powerKw != null && v.powerKw < -0.05f;
+    }
+
+    // ---------- Sky ----------
+
+    private void buildSky(int w, int h, float u) {
+        sky = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
+        skyW = w;
+        skyH = h;
+        Canvas c = new Canvas(sky);
+        Paint p = new Paint();
+        p.setShader(new LinearGradient(0, 0, 0, h, new int[] { SKY_TOP, SKY_LOW, 0xFF4A1A3A },
+                new float[] { 0f, 0.7f, 1f }, Shader.TileMode.CLAMP));
+        c.drawRect(0, 0, w, h, p);
+        Paint star = new Paint(Paint.ANTI_ALIAS_FLAG);
+        star.setColor(0x80FFFFFF);
+        for (int i = 0; i < 90; i++) {
+            float x = ((i * 191 + 17) % 1009) / 1009f * w, y = ((i * 83 + 5) % 421) * u;
+            c.drawCircle(x, y, (i % 4 == 0 ? 1.7f : 0.9f) * u, star);
+        }
+        // Bare trees in the distance.
+        tree(c, w * 0.235f, 590f * u, 150f * u, u);
+        tree(c, w * 0.745f, 590f * u, 118f * u, u);
+    }
+
+    /** A bare tree: a trunk and branches that fork twice. */
+    private void tree(Canvas c, float x, float y, float tall, float u) {
+        Paint p = new Paint(Paint.ANTI_ALIAS_FLAG);
+        p.setStyle(Paint.Style.STROKE);
+        p.setStrokeCap(Paint.Cap.ROUND);
+        p.setColor(0xFF160B20);
+        branch(c, p, x, y, -90f, tall * 0.5f, 7f * u, 4);
+    }
+
+    private void branch(Canvas c, Paint p, float x, float y, float deg, float len, float width, int depth) {
+        double a = Math.toRadians(deg);
+        float nx = x + (float) Math.cos(a) * len, ny = y + (float) Math.sin(a) * len;
+        p.setStrokeWidth(width);
+        c.drawLine(x, y, nx, ny, p);
+        if (depth == 0) return;
+        branch(c, p, nx, ny, deg - 24f - depth * 3f, len * 0.68f, width * 0.65f, depth - 1);
+        branch(c, p, nx, ny, deg + 28f - depth * 2f, len * 0.62f, width * 0.65f, depth - 1);
+    }
+
+    // ---------- Moon and clock ----------
+
+    private void drawMoon(Canvas c, int w, float u) {
+        float rad = 74f * u, cx = w - 100f * u - rad * 0.2f, cy = 96f * u;
+        glow.setShader(new RadialGradient(cx, cy, rad * 2.2f, new int[] { 0x55F4E9B8, 0x00F4E9B8 }, null,
+                Shader.TileMode.CLAMP));
+        c.drawCircle(cx, cy, rad * 2.2f, glow);
+        fill.setColor(MOON);
+        c.drawCircle(cx, cy, rad, fill);
+        fill.setColor(MOON_SHADE);
+        c.drawCircle(cx - 42f * u, cy - 34f * u, 12f * u, fill);
+        c.drawCircle(cx + 40f * u, cy + 38f * u, 16f * u, fill);
+        c.drawCircle(cx + 46f * u, cy - 26f * u, 7f * u, fill);
+        c.drawCircle(cx - 30f * u, cy + 44f * u, 8f * u, fill);
+        label(c, v.clock.isEmpty() ? "—" : v.clock, cx, cy + 17f * u, 50f * u, INK, serif, Paint.Align.CENTER);
+    }
+
+    // ---------- Bats: the range ----------
+
+    private void drawBats(Canvas c, int w, float u) {
+        int lit = Tally.lit(v.rangeKm, 50f, BATS);
+        float cx = w / 2f;
+        for (int i = 0; i < lit; i++) {
+            // Each its own lane high in the sky, clear of the pumpkin's middle.
+            float lane = (40f + (i * 37) % 70) * u;
+            float span = w * 0.92f, speed = (26f + i * 5f) * u;
+            float x = ((i * 0.13f * span + time * speed) % span) + w * 0.04f;
+            float y = lane + (float) Math.sin(time * 2f + i) * 8f * u;
+            if (Math.abs(x - cx) < 60f * u) y -= 10f * u;
+            bat(c, x, y, (i % 2 == 0 ? 20f : 16f) * u, (float) Math.sin(time * 14f + i * 2f), u);
+        }
+    }
+
+    private void bat(Canvas c, float x, float y, float s, float flap, float u) {
+        float tip = -s * 0.5f * flap;
+        path.reset();
+        path.moveTo(x, y - s * 0.3f);
+        path.quadTo(x + s * 0.6f, y - s * 0.7f + tip, x + s * 1.5f, y - s * 0.3f + tip);
+        path.quadTo(x + s * 1.1f, y + s * 0.05f, x + s * 0.9f, y + s * 0.35f);
+        path.quadTo(x + s * 0.6f, y + s * 0.05f, x + s * 0.35f, y + s * 0.4f);
+        path.quadTo(x + s * 0.15f, y + s * 0.15f, x, y + s * 0.5f);
+        path.quadTo(x - s * 0.15f, y + s * 0.15f, x - s * 0.35f, y + s * 0.4f);
+        path.quadTo(x - s * 0.6f, y + s * 0.05f, x - s * 0.9f, y + s * 0.35f);
+        path.quadTo(x - s * 1.1f, y + s * 0.05f, x - s * 1.5f, y - s * 0.3f + tip);
+        path.quadTo(x - s * 0.6f, y - s * 0.7f + tip, x, y - s * 0.3f);
+        path.close();
+        // Lit by the moon: black would vanish in the night sky.
+        fill.setColor(BAT);
+        c.drawPath(path, fill);
+        line.setColor(BAT_EDGE);
+        line.setStrokeWidth(1.5f * u);
+        c.drawPath(path, line);
+    }
+
+    // ---------- Ghost: only where there is room ----------
+
+    private void drawGhost(Canvas c, int w, float u) {
+        if (w / u < 1400f) return;
+        float x = (w / 2f + 272f * u + w - 290f * u) / 2f, y = 330f * u + (float) Math.sin(time * 1.4f) * 12f * u, s = 34f * u;
+        path.reset();
+        path.moveTo(x - s, y + s * 1.5f);
+        path.lineTo(x - s, y);
+        path.cubicTo(x - s, y - s * 1.4f, x + s, y - s * 1.4f, x + s, y);
+        path.lineTo(x + s, y + s * 1.5f);
+        float wob = (float) Math.sin(time * 3f) * s * 0.12f;
+        path.quadTo(x + s * 0.66f, y + s * 1.1f + wob, x + s * 0.33f, y + s * 1.5f);
+        path.quadTo(x, y + s * 1.1f - wob, x - s * 0.33f, y + s * 1.5f);
+        path.quadTo(x - s * 0.66f, y + s * 1.1f + wob, x - s, y + s * 1.5f);
+        path.close();
+        fill.setColor(0xB8F0F4FF);
+        c.drawPath(path, fill);
+        fill.setColor(0xFF1A1030);
+        c.drawCircle(x - s * 0.34f, y - s * 0.2f, s * 0.14f, fill);
+        c.drawCircle(x + s * 0.34f, y - s * 0.2f, s * 0.14f, fill);
+        r.set(x - s * 0.14f, y + s * 0.08f, x + s * 0.14f, y + s * 0.44f);
+        c.drawOval(r, fill);
+    }
+
+    // ---------- The hill: the last two minutes of power ----------
+
+    private void drawHill(Canvas c, int w, int h, float u) {
+        float base = h - 44f * u, amp = 36f * u;
+        float[] trail = v.powerTrail;
+        path.reset();
+        path.moveTo(0, h);
+        int n = trail == null ? 0 : trail.length;
+        if (n == 0) {
+            path.lineTo(0, base);
+            path.lineTo(w, base);
+        } else {
+            for (int i = 0; i < n; i++) {
+                float p = trail[i];
+                float height = Float.isNaN(p) ? 0f : Math.min(1f, Math.abs(p) / (p < 0 ? 40f : 60f));
+                path.lineTo(i / (n - 1f) * w, base - height * amp);
+            }
+        }
+        path.lineTo(w, h);
+        path.close();
+        fill.setColor(HILL);
+        c.drawPath(path, fill);
+        // The ridge line, each stretch in the colour of what the car was doing then.
+        if (n > 1) {
+            line.setStrokeWidth(3f * u);
+            for (int i = 1; i < n; i++) {
+                float a = trail[i - 1], b = trail[i];
+                if (Float.isNaN(a) || Float.isNaN(b)) continue;
+                float ha = Math.min(1f, Math.abs(a) / (a < 0 ? 40f : 60f));
+                float hb = Math.min(1f, Math.abs(b) / (b < 0 ? 40f : 60f));
+                line.setColor(b < 0 ? FIRE : ORANGE);
+                c.drawLine((i - 1f) / (n - 1f) * w, base - ha * amp, i / (n - 1f) * w, base - hb * amp, line);
+            }
+        }
+    }
+
+    // ---------- What plays: a bat tows it across the sky on a banner ----------
+
+    /**
+     * A bat pulls a parchment banner with the song from left to right, high in the sky, behind the
+     * sign and the moon, again and again while something plays. Returns whether it is drawn, so
+     * the view keeps animating for it.
+     */
+    private boolean drawSong(Canvas c, int w, float u) {
+        if (v.songTitle == null) return false;
+        text.setTypeface(face);
+        text.setTextSize(19f * u);
+        float room = Math.min(560f * u, w * 0.45f);
+        String artist = v.songArtist == null ? "" : " — " + cut(v.songArtist, room / 2.5f);
+        // A long title gives way, so the artist stays.
+        String s = "♪ " + cut(v.songTitle, room - text.measureText("♪ " + artist)) + artist;
+        float t = SystemClock.uptimeMillis() / 1000f;
+        float bw = text.measureText(s) + 40f * u, bh = 30f * u, tow = 56f * u;
+        // One pass takes about half a minute; then it comes round again from the left.
+        float travel = w + bw + tow + 80f * u;
+        float bx = (t * 70f * u) % travel - bw - tow - 40f * u;
+        // In the strip of sky above the sign, clear of it.
+        float yc = 34f * u + (float) Math.sin(t * 1.3f) * 4f * u;
+        float top = yc - bh / 2f, bottom = yc + bh / 2f, right = bx + bw, notch = 12f * u;
+        // The ribbon, its trailing end cut as a swallowtail.
+        path.reset();
+        path.moveTo(bx, top);
+        path.lineTo(right, top);
+        path.lineTo(right, bottom);
+        path.lineTo(bx, bottom);
+        path.lineTo(bx + notch, yc);
+        path.close();
+        fill.setColor(BONE);
+        c.drawPath(path, fill);
+        line.setColor(0xFF8A6A3A);
+        line.setStrokeWidth(2f * u);
+        c.drawPath(path, line);
+        label(c, s, bx + notch + (bw - notch) / 2f, yc + 7f * u, 19f * u, INK, face, Paint.Align.CENTER);
+        // The tow lines, and the bat at their end.
+        float batX = right + tow, batY = yc - 10f * u;
+        line.setColor(BAT_EDGE);
+        line.setStrokeWidth(1.5f * u);
+        c.drawLine(right, top + 3f * u, batX, batY + 6f * u, line);
+        c.drawLine(right, bottom - 3f * u, batX, batY + 6f * u, line);
+        bat(c, batX, batY, 26f * u, (float) Math.sin(t * 12f), u);
+        return true;
+    }
+
+    /** {@code s} cut with "…" to fit {@code room} in the text paint as set. */
+    private String cut(String s, float room) {
+        if (text.measureText(s) <= room) return s;
+        int fits = text.breakText(s, true, Math.max(0f, room - text.measureText("…")), null);
+        return s.substring(0, Math.max(0, fits)).trim() + "…";
+    }
+
+    // ---------- The arch of embers: the power ----------
+
+    private void drawEmbers(Canvas c, int w, float u) {
+        float cx = w / 2f, cy = 348f * u, radX = 272f * u, radY = 244f * u;
+        int lit = Tally.ofPower(v.powerKw, 150f, 50f, EMBERS);
+        boolean regen = v.powerKw != null && v.powerKw < 0f;
+        for (int i = 0; i < EMBERS; i++) {
+            // Left to right over the top; regeneration comes back from the right.
+            int k = regen ? EMBERS - 1 - i : i;
+            double a = Math.PI + Math.PI * k / (EMBERS - 1);
+            float x = cx + (float) Math.cos(a) * radX, y = cy + (float) Math.sin(a) * radY;
+            boolean on = i < lit;
+            if (on) {
+                fill.setColor(AccentColor.withAlpha(regen ? FIRE : ORANGE, 0x44));
+                c.drawCircle(x, y, 15f * u, fill);
+            }
+            fill.setColor(on ? (regen ? FIRE : CANDLE) : 0x38FFFFFF);
+            c.drawCircle(x, y, 7.5f * u, fill);
+        }
+    }
+
+    // ---------- The jack-o'-lantern: the speed ----------
+
+    private void drawPumpkin(Canvas c, int w, float u, float pulse) {
+        float cx = w / 2f, cy = 348f * u, rx = 200f * u, ry = 158f * u;
+        boolean regen = regen();
+        // The carving brightens on the beat, gently, and stays yellow or green.
+        int burn = brighter(regen ? FIRE : CANDLE, pulse * 0.35f);
+        // The light it throws, stronger the more power, swelling with the music.
+        float share = v.powerKw == null ? 0f : Math.min(1f, Math.abs(v.powerKw) / 80f);
+        float reach = rx * (1.6f + pulse * 0.2f);
+        glow.setShader(new RadialGradient(cx, cy, reach,
+                new int[] { AccentColor.withAlpha(regen ? FIRE : ORANGE, 0x30 + (int) (share * 0x50) + (int) (pulse * 0x60)),
+                        AccentColor.withAlpha(regen ? FIRE : ORANGE, 0) }, null, Shader.TileMode.CLAMP));
+        c.drawCircle(cx, cy, reach, glow);
+        // The stem.
+        path.reset();
+        path.moveTo(cx - 22f * u, cy - ry + 12f * u);
+        path.quadTo(cx - 14f * u, cy - ry - 26f * u, cx + 14f * u, cy - ry - 44f * u);
+        path.lineTo(cx + 34f * u, cy - ry - 30f * u);
+        path.quadTo(cx + 14f * u, cy - ry - 12f * u, cx + 22f * u, cy - ry + 12f * u);
+        path.close();
+        fill.setColor(STEM);
+        c.drawPath(path, fill);
+        // The ribs, outermost first, overlapping.
+        float[][] ribs = { { -0.70f, 0.42f }, { 0.70f, 0.42f }, { -0.40f, 0.48f }, { 0.40f, 0.48f }, { 0f, 0.50f } };
+        for (int i = 0; i < ribs.length; i++) {
+            float rcx = cx + ribs[i][0] * rx, half = ribs[i][1] * rx;
+            r.set(rcx - half, cy - ry * (i < 2 ? 0.86f : 0.98f), rcx + half, cy + ry * (i < 2 ? 0.86f : 0.98f));
+            fill.setColor(i % 2 == 0 ? PUMPKIN : PUMPKIN_LIT);
+            if (i == ribs.length - 1) fill.setColor(PUMPKIN);
+            c.drawOval(r, fill);
+            line.setColor(PUMPKIN_DARK);
+            line.setStrokeWidth(2.5f * u);
+            c.drawOval(r, line);
+        }
+        // Eyes and nose: triangles, burning.
+        triangle(c, cx - 88f * u, cy - 92f * u, cx - 34f * u, cy - 28f * u, cx - 128f * u, cy - 28f * u, burn, u);
+        triangle(c, cx + 88f * u, cy - 92f * u, cx + 128f * u, cy - 28f * u, cx + 34f * u, cy - 28f * u, burn, u);
+        triangle(c, cx, cy - 28f * u, cx + 19f * u, cy + 4f * u, cx - 19f * u, cy + 4f * u, burn, u);
+        // The grin, with the speed cut dark into its light.
+        float gt = cy + 8f * u, gb = cy + 122f * u, gw = 156f * u;
+        path.reset();
+        path.moveTo(cx - gw, gt);
+        path.quadTo(cx, gt + 26f * u, cx + gw, gt);
+        path.quadTo(cx + gw * 0.82f, gb, cx, gb);
+        path.quadTo(cx - gw * 0.82f, gb, cx - gw, gt);
+        path.close();
+        fill.setColor(0xFF4A1F04);
+        c.drawPath(path, fill);
+        c.save();
+        c.scale(0.965f, 0.93f, cx, (gt + gb) / 2f);
+        fill.setColor(burn);
+        c.drawPath(path, fill);
+        c.restore();
+        // Two teeth at the grin's corners, clear of the digits, each the colour of the rib it hangs from.
+        tooth(c, cx, -120f * u, gw, gt, 26f * u, 17f * u, gt + 40f * u, PUMPKIN, u);
+        tooth(c, cx, 120f * u, gw, gt, 26f * u, 17f * u, gt + 40f * u, PUMPKIN_LIT, u);
+        label(c, fmt(v.speedKmh, "%.0f", "—"), cx, gb - 18f * u, 92f * u, INK, serif, Paint.Align.CENTER);
+        label(c, "KM/H", cx + 80f * u, cy + 64f * u, 16f * u, INK, face, Paint.Align.LEFT);
+        // The power under the pumpkin, above the ridge.
+        String power = v.powerKw == null ? "— kW" : String.format(Locale.US, regen ? "+%.1f kW" : "%.1f kW",
+                Math.abs(v.powerKw));
+        label(c, power, cx, cy + ry + 44f * u, 34f * u, regen ? FIRE : BONE, face, Paint.Align.CENTER);
+    }
+
+    /** The colour moved {@code share} of the way to white. */
+    private static int brighter(int colour, float share) {
+        int r = (colour >> 16) & 0xFF, g = (colour >> 8) & 0xFF, b = colour & 0xFF;
+        return 0xFF000000 | (r + (int) ((255 - r) * share)) << 16 | (g + (int) ((255 - g) * share)) << 8
+                | (b + (int) ((255 - b) * share));
+    }
+
+    private void triangle(Canvas c, float x1, float y1, float x2, float y2, float x3, float y3, int burn, float u) {
+        path.reset();
+        path.moveTo(x1, y1);
+        path.lineTo(x2, y2);
+        path.lineTo(x3, y3);
+        path.close();
+        fill.setColor(burn);
+        c.drawPath(path, fill);
+        line.setColor(0xFF4A1F04);
+        line.setStrokeWidth(4f * u);
+        c.drawPath(path, line);
+    }
+
+    /** A triangle hanging from the grin's upper lip (a curve sagging by {@code sag}) to {@code tipY}. */
+    private void tooth(Canvas c, float cx, float dx, float gw, float gt, float sag, float halfW, float tipY, int colour, float u) {
+        float left = lip(dx - halfW, gw, gt, sag), right = lip(dx + halfW, gw, gt, sag);
+        path.reset();
+        // A little above the lip, so none of its dark edge shows across the tooth's root.
+        path.moveTo(cx + dx - halfW, left - 1.5f * u);
+        path.lineTo(cx + dx + halfW, right - 1.5f * u);
+        path.lineTo(cx + dx, tipY);
+        path.close();
+        fill.setColor(colour);
+        c.drawPath(path, fill);
+        line.setColor(0xFF4A1F04);
+        line.setStrokeWidth(3f * u);
+        c.drawLine(cx + dx - halfW, left + 2f * u, cx + dx, tipY, line);
+        c.drawLine(cx + dx + halfW, right + 2f * u, cx + dx, tipY, line);
+    }
+
+    /** The height of the grin's upper lip {@code dx} from the middle. */
+    private static float lip(float dx, float gw, float gt, float sag) {
+        float t = (gw - Math.abs(dx)) / (2f * gw);
+        return gt + 2f * t * (1f - t) * sag;
+    }
+
+    // ---------- Left: the sign under the cobweb ----------
+
+    private void drawSign(Canvas c, float u) {
+        // The cobweb in the corner.
+        float cs = 150f * u;
+        line.setColor(0x70E8E8F4);
+        line.setStrokeWidth(1.2f * u);
+        for (int i = 0; i <= 5; i++) {
+            double a = Math.PI / 2 * i / 5;
+            c.drawLine(0, 0, (float) Math.cos(a) * cs, (float) Math.sin(a) * cs, line);
+        }
+        for (int ring = 1; ring <= 4; ring++) {
+            float d = cs * ring / 4f;
+            path.reset();
+            for (int i = 0; i <= 5; i++) {
+                double a = Math.PI / 2 * i / 5;
+                float x = (float) Math.cos(a) * d, y = (float) Math.sin(a) * d;
+                if (i == 0) {
+                    path.moveTo(x, y);
+                } else {
+                    double mid = Math.PI / 2 * (i - 0.5) / 5;
+                    path.quadTo((float) Math.cos(mid) * d * 0.86f, (float) Math.sin(mid) * d * 0.86f, x, y);
+                }
+            }
+            c.drawPath(path, line);
+        }
+        // The sign, on two threads.
+        float l = 28f * u, rr = l + 300f * u, t = 50f * u, b = 244f * u;
+        line.setColor(0xA0E8E8F4);
+        c.drawLine(l + 60f * u, 0, l + 60f * u, t, line);
+        c.drawLine(rr - 60f * u, 0, rr - 60f * u, t, line);
+        r.set(l, t, rr, b);
+        fill.setColor(WOOD);
+        c.drawRoundRect(r, 8f * u, 8f * u, fill);
+        line.setColor(0xFF6B4226);
+        line.setStrokeWidth(2.5f * u);
+        c.drawRoundRect(r, 8f * u, 8f * u, line);
+        String[][] rows = {
+                { "TRIP", fmt(v.tripKm, "%.1f km", "—") },
+                { "5 MIN", fmt(v.usage5Min, "%.1f kWh/100", "—") },
+                { "SINCE START", fmt(v.usageTrip, "%.1f kWh/100", "—") },
+                { "CLIMATE", fmt(v.climateCelsius, "%.0f °C", "—") },
+                { "ODOMETER", fmt(v.odometerKm, "%,.0f km", "—") },
+        };
+        for (int i = 0; i < rows.length; i++) {
+            float y = t + (36f + i * 34f) * u;
+            label(c, rows[i][0], l + 16f * u, y, 19f * u, ORANGE, thin, Paint.Align.LEFT);
+            label(c, rows[i][1], rr - 16f * u, y, 23f * u, BONE, face, Paint.Align.RIGHT);
+        }
+    }
+
+    // ---------- The potion flask: the battery ----------
+
+    private void drawFlask(Canvas c, float u) {
+        float rad = 104f * u, cx = 28f * u + 150f * u, cy = 452f * u;
+        boolean low = v.socPercent != null && v.socPercent < 20f;
+        boolean blinkOn = (SystemClock.uptimeMillis() / 500) % 2 == 0;
+        int colour = low ? RED : POTION;
+        float neckW = 34f * u, neckTop = cy - rad - 42f * u;
+        // The glass shape: a round belly and a neck.
+        path.reset();
+        path.addCircle(cx, cy, rad, Path.Direction.CW);
+        r.set(cx - neckW, neckTop, cx + neckW, cy - rad + 16f * u);
+        path.addRect(r, Path.Direction.CW);
+        fill.setColor(0x38B9D8D0);
+        c.drawPath(path, fill);
+        // The potion: as high as the battery is full, across the belly only.
+        if (v.socPercent != null) {
+            float share = Math.max(0f, Math.min(1f, v.socPercent / 100f));
+            float level = cy + rad - share * 2f * rad;
+            c.save();
+            c.clipRect(cx - rad, level, cx + rad, cy + rad + 1f);
+            fill.setColor(colour);
+            c.drawCircle(cx, cy, rad - 5f * u, fill);
+            c.restore();
+            // The surface, a brighter line.
+            float half = (float) Math.sqrt(Math.max(0f, (rad - 5f * u) * (rad - 5f * u) - (level - cy) * (level - cy)));
+            line.setColor(0xCCFFFFFF);
+            line.setStrokeWidth(2.5f * u);
+            if (half > 0f) c.drawLine(cx - half, level, cx + half, level, line);
+            // Bubbles rise only while driving.
+            fill.setColor(0x99FFFFFF);
+            for (int i = 0; i < 6; i++) {
+                float span = Math.max(1f, cy + rad - level - 12f * u);
+                float y = cy + rad - 12f * u - ((time * (24f + i * 7f) * u + i * 31f * u) % span);
+                float x = cx + (float) Math.sin(i * 2.1f + time * 1.5f) * rad * 0.5f;
+                c.drawCircle(x, y, (3f + i % 3) * u, fill);
+            }
+        }
+        // The glass, and its cork.
+        line.setColor(GLASS);
+        line.setStrokeWidth(4f * u);
+        c.drawCircle(cx, cy, rad, line);
+        c.drawLine(cx - neckW, neckTop + 12f * u, cx - neckW, cy - rad + 14f * u, line);
+        c.drawLine(cx + neckW, neckTop + 12f * u, cx + neckW, cy - rad + 14f * u, line);
+        r.set(cx - neckW - 4f * u, neckTop - 8f * u, cx + neckW + 4f * u, neckTop + 16f * u);
+        fill.setColor(0xFF9B6B3A);
+        c.drawRoundRect(r, 5f * u, 5f * u, fill);
+        // Dark where the potion is behind the words; outlined where its surface cuts through them.
+        float level = v.socPercent == null ? cy + rad
+                : cy + rad - Math.max(0f, Math.min(1f, v.socPercent / 100f)) * 2f * rad;
+        boolean numberOn = level <= cy - 18f * u, wordOn = level <= cy + 38f * u;
+        String number = fmt(v.socPercent, "%.0f %%", "—");
+        if (!numberOn && level < cy + 30f * u) {
+            text.setStyle(Paint.Style.STROKE);
+            text.setStrokeWidth(7f * u);
+            label(c, number, cx, cy + 22f * u, 62f * u, INK, serif, Paint.Align.CENTER);
+            text.setStyle(Paint.Style.FILL);
+        }
+        label(c, number, cx, cy + 22f * u, 62f * u, numberOn ? INK : low ? RED : BONE, serif, Paint.Align.CENTER);
+        if (low && blinkOn) {
+            label(c, "BATTERY LOW", cx, cy + 56f * u, 21f * u, BONE, face, Paint.Align.CENTER);
+        } else if (!low) {
+            label(c, "BATTERY", cx, cy + 56f * u, 19f * u, wordOn ? INK : POTION, face, Paint.Align.CENTER);
+        }
+    }
+
+    // ---------- The tombstone: the range; small gravestones: the gears ----------
+
+    private void stone(Canvas c, float l, float t, float rr, float b, int colour, int edge, float u) {
+        float mid = (l + rr) / 2f, half = (rr - l) / 2f;
+        path.reset();
+        path.moveTo(l, b);
+        path.lineTo(l, t + half);
+        path.cubicTo(l, t + half * 0.1f, mid - half * 0.5f, t, mid, t);
+        path.cubicTo(mid + half * 0.5f, t, rr, t + half * 0.1f, rr, t + half);
+        path.lineTo(rr, b);
+        path.close();
+        fill.setColor(colour);
+        c.drawPath(path, fill);
+        line.setColor(edge);
+        line.setStrokeWidth(3f * u);
+        c.drawPath(path, line);
+    }
+
+    private void drawTombstone(Canvas c, int w, float u) {
+        float rr = w - 40f * u, l = rr - 250f * u, t = 196f * u, b = 484f * u, mid = (l + rr) / 2f;
+        stone(c, l, t, rr, b, STONE, STONE_DARK, u);
+        label(c, "R.I.P.", mid, t + 70f * u, 36f * u, STONE_DARK, serif, Paint.Align.CENTER);
+        label(c, "HERE LIES", mid, t + 106f * u, 19f * u, 0xFF242230, face, Paint.Align.CENTER);
+        label(c, fmt(v.rangeKm, "%.0f", "—"), mid, t + 186f * u, 86f * u, BONE, serif, Paint.Align.CENTER);
+        label(c, "KM OF RANGE", mid, t + 224f * u, 21f * u, 0xFF242230, face, Paint.Align.CENTER);
+    }
+
+    private void drawGears(Canvas c, int w, float u) {
+        float rr = w - 40f * u, l = rr - 250f * u, t = 496f * u, b = 566f * u;
+        String[] gears = { "P", "R", "N", "D" };
+        String now = Gear.label(v.gear);
+        float step = (rr - l) / 4f, half = 24f * u;
+        for (int i = 0; i < gears.length; i++) {
+            float mid = l + (i + 0.5f) * step;
+            boolean on = gears[i].equals(now);
+            if (on) {
+                fill.setColor(0x55FF8C1A);
+                c.drawCircle(mid, (t + b) / 2f, 42f * u, fill);
+            }
+            stone(c, mid - half, t, mid + half, b, on ? ORANGE : STONE_DARK, on ? CANDLE : 0xFF242230, u);
+            label(c, gears[i], mid, b - 18f * u, 32f * u, on ? INK : 0xB0FFFFFF, serif, Paint.Align.CENTER);
+        }
+    }
+}

app/src/main/java/com/evsuite/abrp/LogOutbox.java

@@ -85,6 +85,12 @@ final class LogOutbox {
         return true;
     }
 
+    /** Removes what waits under names starting with [prefix]. */
+    static synchronized void dropWaiting(Context context, String prefix) {
+        File dir = new File(context.getFilesDir(), DIR);
+        for (String name : waiting(dir)) if (name.startsWith(prefix)) new File(dir, name).delete();
+    }
+
     /** Sends what waits, unless the last attempt failed less than {@link #RETRY_MS} ago. Blocking:
      *  call it off the main thread. */
     static void sendIfDue(Context context) {

app/src/main/java/com/evsuite/abrp/MainActivity.java

@@ -77,6 +77,8 @@ public class MainActivity extends AppCompatActivity {
     private boolean inFront;
     /** The pane of each Overview style, by its {@link OverviewStyle} ordinal. */
     private View[] stylePanes;
+    private MusicTap musicTap;
+    private NowPlayingWatcher nowPlaying;
     private View consumptionPane;
     private View chargingPane;
     /** Display, battery, charging price and Wi-Fi. */
@@ -195,6 +197,8 @@ public class MainActivity extends AppCompatActivity {
             @Override public void onPageSelected(int position) {
                 markCurrentPage(position);
                 applyOverviewFullScreen(position);
+                updateMusicTap();
+                updateNowPlaying();
             }
         });
         findViewById(R.id.edge_tab).setOnClickListener(v -> leaveOverviewFullScreen());
@@ -213,6 +217,10 @@ public class MainActivity extends AppCompatActivity {
 
     /** Whether the Overview hides the navigation (the button in the navigation's header). */
     static final String PREF_OVERVIEW_FULLSCREEN = "overview_fullscreen";
+    /** The Overview shows what plays (Tiles, Halloween); on by default. */
+    static final String PREF_NOW_PLAYING = "now_playing";
+    /** The Halloween pumpkin's light follows the music; off by default, so the analyser stays off. */
+    static final String PREF_MUSIC_LIGHT = "music_light";
 
     /** True while the Overview is full screen: the navigation hidden, the edge swipe armed. */
     private boolean overviewFull;
@@ -353,9 +361,13 @@ public class MainActivity extends AppCompatActivity {
         mapRoads = new MapRoads(this);
         gridMapView = new GridView(this, mapRoads);
         visorView = new VisorView(this);
+        HalloweenView halloweenView = new HalloweenView(this);
+        musicTap = new MusicTap(this);
+        nowPlaying = new NowPlayingWatcher(this);
+        halloweenView.setMusic(musicTap);
         java.util.Collections.addAll(canvasStyles, new MinimalView(this), terminalView,
                 new NixieView(this), new ChronographView(this), gridView, gridMapView, new TimeCircuitsView(this),
-                new QuestView(this), visorView, new EmpireView(this));
+                new QuestView(this), visorView, new EmpireView(this), new MuertosView(this), halloweenView);
         View[] canvasPanes = new View[canvasStyles.size()];
         for (int i = 0; i < canvasPanes.length; i++) canvasPanes[i] = drawnPane(canvasStyles.get(i));
         // Grid with map: its map layer goes under it, in the same pane.
@@ -412,6 +424,10 @@ public class MainActivity extends AppCompatActivity {
             MediaProbe.start(this);
             refreshMediaProbe();
         });
+        logPane.findViewById(R.id.sound_probe_button).setOnClickListener(v -> {
+            SoundProbe.start(this);
+            refreshSoundProbe();
+        });
 
         setUpPager();
         // Back on the page that was open when the activity was recreated (accent colour change).
@@ -502,6 +518,8 @@ public class MainActivity extends AppCompatActivity {
         uiHandler.post(overviewRefresh);
         inFront = true;
         updateMapLocation();
+        updateMusicTap();
+        updateNowPlaying();
     }
 
     @Override
@@ -551,6 +569,8 @@ public class MainActivity extends AppCompatActivity {
         uiHandler.removeCallbacks(overviewRefresh);
         inFront = false;
         updateMapLocation();
+        updateMusicTap();
+        updateNowPlaying();
     }
 
     @Override
@@ -1212,6 +1232,18 @@ public class MainActivity extends AppCompatActivity {
         bindDriveMode();
         bindOverviewStyle();
         bindAccentColor();
+        SwitchMaterial showPlaying = settingsPane.findViewById(R.id.now_playing_switch);
+        showPlaying.setChecked(prefs.getBoolean(PREF_NOW_PLAYING, true));
+        showPlaying.setOnCheckedChangeListener((btn, checked) -> {
+            prefs.edit().putBoolean(PREF_NOW_PLAYING, checked).apply();
+            updateNowPlaying();
+        });
+        SwitchMaterial musicLight = settingsPane.findViewById(R.id.music_light_switch);
+        musicLight.setChecked(prefs.getBoolean(PREF_MUSIC_LIGHT, false));
+        musicLight.setOnCheckedChangeListener((btn, checked) -> {
+            prefs.edit().putBoolean(PREF_MUSIC_LIGHT, checked).apply();
+            updateMusicTap();
+        });
         fullScreenSwitch = settingsPane.findViewById(R.id.full_screen_switch);
         fullScreenSwitch.setChecked(UploadSettings.fullScreen(prefs));
         fullScreenSwitch.setOnCheckedChangeListener((btn, checked) -> {
@@ -1747,6 +1779,69 @@ public class MainActivity extends AppCompatActivity {
         // The accent choices depend on the style ("Original colours" for Retro and Terminal).
         if (settingsPane != null) bindAccentColor();
         updateMapLocation();
+        updateMusicTap();
+        updateNowPlaying();
+    }
+
+    /** The styles that show what plays. */
+    private static boolean showsNowPlaying(OverviewStyle style) {
+        return style == OverviewStyle.TILES || style == OverviewStyle.HALLOWEEN;
+    }
+
+    /** The media sessions are watched only while what plays can be seen, and the switch is on. */
+    private void updateNowPlaying() {
+        ViewPager2 pager = findViewById(R.id.content);
+        nowPlaying.setRunning(inFront && showsNowPlaying(overviewStyle())
+                && prefs.getBoolean(PREF_NOW_PLAYING, true)
+                && pager != null && pager.getCurrentItem() == 0);
+        if (!nowPlaying.isRunning()) showNowPlaying(null);
+    }
+
+    /** The Tiles tile: source, title, artist, a cover when there is one, and how far the song is. */
+    private void showNowPlaying(NowPlaying.Track t) {
+        if (vehiclePane == null) return;
+        View tile = vehiclePane.findViewById(R.id.now_playing_tile);
+        if (tile == null) return; // the narrow layout has no room for it
+        if (t == null) {
+            tile.setVisibility(View.INVISIBLE);
+            return;
+        }
+        tile.setVisibility(View.VISIBLE);
+        String source = getString(t.source == NowPlaying.Source.BLUETOOTH ? R.string.now_playing_bluetooth
+                : t.source == NowPlaying.Source.CARPLAY ? R.string.now_playing_carplay
+                : t.source == NowPlaying.Source.RADIO ? R.string.now_playing_radio : R.string.now_playing_other);
+        setIfChanged(vehiclePane.findViewById(R.id.now_playing_source),
+                t.playing ? source : getString(R.string.now_playing_paused, source));
+        setIfChanged(vehiclePane.findViewById(R.id.now_playing_title), t.title);
+        TextView artist = vehiclePane.findViewById(R.id.now_playing_artist);
+        setIfChanged(artist, t.subtitle == null ? "" : t.subtitle);
+        artist.setVisibility(t.subtitle == null ? View.GONE : View.VISIBLE);
+        android.widget.ImageView cover = vehiclePane.findViewById(R.id.now_playing_cover);
+        android.graphics.Bitmap art = nowPlaying.cover(t);
+        if (cover.getTag() != art) {
+            cover.setTag(art);
+            cover.setImageBitmap(art);
+            cover.setVisibility(art == null ? View.GONE : View.VISIBLE);
+        }
+        android.widget.ProgressBar bar = vehiclePane.findViewById(R.id.now_playing_progress);
+        float progress = t.progressAt(android.os.SystemClock.elapsedRealtime());
+        bar.setVisibility(progress < 0f ? View.INVISIBLE : View.VISIBLE);
+        if (progress >= 0f) bar.setProgress(Math.round(progress * bar.getMax()));
+    }
+
+    private static void setIfChanged(TextView view, CharSequence text) {
+        if (!android.text.TextUtils.equals(view.getText(), text)) view.setText(text);
+    }
+
+    /**
+     * The pumpkin listens only while it can be seen (the app in front, on the Overview, in
+     * Halloween) and only when "Pumpkin light follows the music" is on.
+     */
+    private void updateMusicTap() {
+        ViewPager2 pager = findViewById(R.id.content);
+        musicTap.setRunning(inFront && overviewStyle() == OverviewStyle.HALLOWEEN
+                && prefs.getBoolean(PREF_MUSIC_LIGHT, false)
+                && pager != null && pager.getCurrentItem() == 0);
     }
 
     /**
@@ -1809,6 +1904,12 @@ public class MainActivity extends AppCompatActivity {
         TextView note = settingsPane.findViewById(R.id.accent_note);
         note.setVisibility(style.usesAccent ? View.GONE : View.VISIBLE);
         note.setText(getString(R.string.accent_not_used, styleLabels()[style.ordinal()]));
+        int playing = showsNowPlaying(style) ? View.VISIBLE : View.GONE;
+        settingsPane.findViewById(R.id.now_playing_switch).setVisibility(playing);
+        settingsPane.findViewById(R.id.now_playing_hint).setVisibility(playing);
+        int music = style == OverviewStyle.HALLOWEEN ? View.VISIBLE : View.GONE;
+        settingsPane.findViewById(R.id.music_light_switch).setVisibility(music);
+        settingsPane.findViewById(R.id.music_light_hint).setVisibility(music);
     }
 
     /** The drop-down's labels, by {@link OverviewStyle} ordinal. */
@@ -1823,7 +1924,8 @@ public class MainActivity extends AppCompatActivity {
                 getString(R.string.overview_style_chronograph), getString(R.string.overview_style_grid),
                 getString(R.string.overview_style_grid_map),
                 getString(R.string.overview_style_time_circuits), getString(R.string.overview_style_quest),
-                getString(R.string.overview_style_visor), getString(R.string.overview_style_empire) };
+                getString(R.string.overview_style_visor), getString(R.string.overview_style_empire),
+                getString(R.string.overview_style_muertos), getString(R.string.overview_style_halloween) };
     }
 
     /** The style drop-down; every style is fed on every reading, only the chosen one is shown. */
@@ -1890,6 +1992,10 @@ public class MainActivity extends AppCompatActivity {
         v.tyreRl = unit.format(s.getTirePressures().getRearLeftKpa());
         v.tyreRr = unit.format(s.getTirePressures().getRearRightKpa());
         v.powerTrail = cockpitTrace.snapshot();
+        NowPlaying.Track track = nowPlaying.isRunning() ? nowPlaying.current() : null;
+        v.songTitle = track == null ? null : track.title;
+        v.songArtist = track == null ? null : track.subtitle;
+        showNowPlaying(track);
         retroView.setValues(v);
         flowView.setValues(v);
         sciFiView.setValues(v);
@@ -2340,9 +2446,20 @@ public class MainActivity extends AppCompatActivity {
         if (!status.isEmpty()) text.setText(String.join("\n", status));
     }
 
+    /** The sound check: its button and its last report. */
+    private void refreshSoundProbe() {
+        MaterialButton button = logPane.findViewById(R.id.sound_probe_button);
+        button.setEnabled(!SoundProbe.running());
+        TextView text = logPane.findViewById(R.id.sound_probe_text);
+        java.util.List<String> status = SoundProbe.status(this);
+        text.setVisibility(status.isEmpty() ? View.GONE : View.VISIBLE);
+        if (!status.isEmpty()) text.setText(String.join("\n", status));
+    }
+
     private void refreshCallLog() {
         refreshSignalRecorder();
         refreshMediaProbe();
+        refreshSoundProbe();
         java.util.List<UploadLog.Entry> entries = AbrpUploadService.log().recent();
         // Update steps first: after a failed install, they are what the driver came here for.
         java.util.List<String> updates = UpdateLog.lines(this);

app/src/main/java/com/evsuite/abrp/MuertosView.java

@@ -0,0 +1,501 @@
+package com.evsuite.abrp;
+
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.graphics.Paint;
+import android.graphics.Path;
+import android.graphics.RadialGradient;
+import android.graphics.RectF;
+import android.graphics.Shader;
+import android.graphics.Typeface;
+import android.os.SystemClock;
+
+import java.util.Locale;
+
+/**
+ * The Día de Muertos Overview style: an ofrenda at night, the altar families build to welcome
+ * their dead back for a visit. A celebration, so bright and warm, not frightening.
+ *
+ * Across the top the papel picado, cut-paper flags on a string: the battery, one flag per 10 %,
+ * those not lit hanging dark. In the middle a calavera, a decorated sugar skull, with the speed
+ * on its forehead and marigolds (cempasúchil) for eyes; round it a ring of marigolds is the power,
+ * clockwise while drawing, turquoise and anticlockwise while regenerating. On the left the candles
+ * of the altar: the range, one candle per 50 km. Along the bottom the path of marigold petals that
+ * leads the visitors home: the last two minutes of power, higher the more power. On the right the
+ * clock in a tin frame, P R N D as four small marigolds, and trip, usage, climate and odometer on
+ * the altar cloth. Below 20 % the battery turns red and says so. Unread values show "—" and light
+ * nothing.
+ *
+ * The altar is drawn once into a bitmap per size; only the readings go over it. The flags sway and
+ * the flames flicker (about 30 frames a second) only while the car moves and the view is on screen.
+ */
+final class MuertosView extends ClusterCanvasView {
+
+    private static final int FLAGS = 10, PETALS = 24, CANDLES = 8;
+    private static final int NIGHT = 0xFF160A26, PLUM = 0xFF2C1242, CLOTH = 0xFF3A0F3E, BONE = 0xFFF8EEDC;
+    private static final int INK = 0xFF2A0E36, MARIGOLD = 0xFFFF9A1F, GOLD = 0xFFFFC94A, TURQUOISE = 0xFF2EE6D0;
+    private static final int PINK = 0xFFFF2E93, RED = 0xFFFF3B47, FLAME = 0xFFFFD36B, WAX = 0xFFF4E6C8;
+    private static final int[] PAPER = { 0xFFFF2E93, 0xFFFF9A1F, 0xFF2EE6D0, 0xFFFFD23F, 0xFF9B5CFF };
+
+    private final Paint fill = new Paint(Paint.ANTI_ALIAS_FLAG);
+    private final Paint line = new Paint(Paint.ANTI_ALIAS_FLAG);
+    private final Paint text = new Paint(Paint.ANTI_ALIAS_FLAG);
+    private final Paint image = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.FILTER_BITMAP_FLAG);
+    private final Path path = new Path();
+    private final Path flag = new Path();
+    private final RectF r = new RectF();
+    private final Typeface serif = Typeface.create("serif", Typeface.BOLD);
+    private final Typeface face = Typeface.create("sans-serif-condensed", Typeface.BOLD);
+    private final Typeface thin = Typeface.create("sans-serif-condensed", Typeface.NORMAL);
+
+    private Bitmap scene, marigold, turquoise;
+    private int sceneW, sceneH;
+    private float time;
+    private long lastFrame;
+
+    MuertosView(Context context) {
+        super(context);
+        line.setStyle(Paint.Style.STROKE);
+        line.setStrokeCap(Paint.Cap.ROUND);
+    }
+
+    @Override
+    protected void onDetachedFromWindow() {
+        super.onDetachedFromWindow();
+        scene = null;
+        marigold = null;
+        turquoise = null;
+        sceneW = 0;
+    }
+
+    @Override
+    protected void onDraw(Canvas c) {
+        super.onDraw(c);
+        int w = getWidth(), h = getHeight();
+        if (w <= 0 || h <= 0) return;
+        float u = Math.min(h / 640f, w / 1100f);
+        boolean moving = v.speedKmh != null && v.speedKmh > 0.5f;
+        if (moving) {
+            long now = SystemClock.uptimeMillis();
+            time += lastFrame == 0 ? 0f : Math.min(0.2f, (now - lastFrame) / 1000f);
+            lastFrame = now;
+        } else {
+            lastFrame = 0;
+        }
+        if (scene == null || sceneW != w || sceneH != h) buildScene(w, h, u);
+        c.drawBitmap(scene, 0, 0, image);
+        float cx = w / 2f, cy = 345f * u;
+        drawFlags(c, w, u);
+        drawRing(c, cx, cy, u);
+        drawSpeed(c, cx, cy, u);
+        drawBattery(c, u);
+        drawCandles(c, u, moving);
+        drawPetals(c, w, h, u);
+        drawClock(c, w, u);
+        drawGears(c, w, u);
+        drawRows(c, w, h, u);
+        keepAnimating(moving, 33);
+    }
+
+    private void label(Canvas c, String s, float x, float y, float size, int colour, Typeface tf, Paint.Align a) {
+        text.setTypeface(tf);
+        text.setTextSize(size);
+        text.setTextAlign(a);
+        text.setColor(colour);
+        c.drawText(s, x, y, text);
+    }
+
+    // ---------- The altar, once per size ----------
+
+    private void buildScene(int w, int h, float u) {
+        scene = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
+        sceneW = w;
+        sceneH = h;
+        marigold = flower(44f * u, MARIGOLD, GOLD, 0xFFE06A00);
+        turquoise = flower(44f * u, TURQUOISE, 0xFFA8FFF4, 0xFF0E9C90);
+        buildFlag(u);
+        Canvas c = new Canvas(scene);
+        c.drawColor(NIGHT);
+        Paint glow = new Paint();
+        glow.setShader(new RadialGradient(w / 2f, 345f * u, Math.max(w, h) * 0.6f,
+                new int[] { 0xFF4A1C5E, PLUM, NIGHT }, new float[] { 0f, 0.45f, 1f }, Shader.TileMode.CLAMP));
+        c.drawRect(0, 0, w, h, glow);
+        // A scatter of stars, always the same.
+        fill.setColor(0x66FFFFFF);
+        for (int i = 0; i < 70; i++) {
+            float x = ((i * 137 + 31) % 997) / 997f * w, y = (110f + (i * 71 % 113) * 3f) * u;
+            c.drawCircle(x, y, (i % 3 == 0 ? 1.8f : 1f) * u, fill);
+        }
+        // The string the flags hang on.
+        line.setColor(0x99FFFFFF);
+        line.setStrokeWidth(1.5f * u);
+        c.drawLine(0, 12f * u, w, 12f * u, line);
+        drawSkull(c, w / 2f, 345f * u, u);
+        drawAltarCloth(c, w, u);
+        drawCandleStands(c, u);
+    }
+
+    /** One flower on a small bitmap: outer petals, inner petals, heart. */
+    private Bitmap flower(float size, int outer, int inner, int shade) {
+        int s = (int) Math.ceil(size);
+        Bitmap b = Bitmap.createBitmap(s, s, Bitmap.Config.ARGB_8888);
+        Canvas c = new Canvas(b);
+        drawFlower(c, s / 2f, s / 2f, s / 2f, outer, inner, shade);
+        return b;
+    }
+
+    private void drawFlower(Canvas c, float x, float y, float rad, int outer, int inner, int shade) {
+        Paint p = new Paint(Paint.ANTI_ALIAS_FLAG);
+        for (int ring = 0; ring < 3; ring++) {
+            int n = 12 - ring * 3;
+            float d = rad * (0.68f - ring * 0.24f), pr = rad * (0.32f - ring * 0.05f);
+            for (int i = 0; i < n; i++) {
+                double a = Math.PI * 2 * i / n + ring * 0.3;
+                p.setColor(ring == 0 ? (i % 2 == 0 ? outer : shade) : ring == 1 ? (i % 2 == 0 ? inner : outer) : inner);
+                c.drawCircle(x + (float) Math.cos(a) * d, y + (float) Math.sin(a) * d, pr, p);
+            }
+        }
+        p.setColor(shade);
+        c.drawCircle(x, y, rad * 0.14f, p);
+    }
+
+    /** A paper flag with its holes cut out: scalloped below, a flower and diamonds in it. */
+    private void buildFlag(float u) {
+        float w = 100f * u, h = 84f * u;
+        flag.reset();
+        flag.setFillType(Path.FillType.EVEN_ODD);
+        flag.moveTo(0, 0);
+        flag.lineTo(w, 0);
+        flag.lineTo(w, h - 8f * u);
+        int scallops = 6;
+        float sw = w / scallops;
+        for (int i = scallops; i > 0; i--) {
+            float x = i * sw;
+            flag.quadTo(x - sw / 2f, h + 8f * u, x - sw, h - 8f * u);
+        }
+        flag.close();
+        // The middle: a flower of eight petals round a round hole.
+        float cx = w / 2f, cy = h * 0.46f;
+        flag.addCircle(cx, cy, 6f * u, Path.Direction.CW);
+        for (int i = 0; i < 8; i++) {
+            double a = Math.PI / 4 * i;
+            float px = cx + (float) Math.cos(a) * 17f * u, py = cy + (float) Math.sin(a) * 17f * u;
+            diamond(flag, px, py, 7f * u, 5f * u, a);
+        }
+        // Corners and borders.
+        for (int i = 0; i < 6; i++) {
+            float x = (i + 0.5f) * w / 6f;
+            diamond(flag, x, 8f * u, 5f * u, 3f * u, 0);
+            if (i == 0 || i == 5) {
+                diamond(flag, x, h * 0.3f, 4f * u, 6f * u, 0);
+                diamond(flag, x, h * 0.62f, 4f * u, 6f * u, 0);
+            }
+        }
+    }
+
+    private static void diamond(Path p, float x, float y, float a, float b, double turn) {
+        float ca = (float) Math.cos(turn), sa = (float) Math.sin(turn);
+        p.moveTo(x + a * ca, y + a * sa);
+        p.lineTo(x - b * sa, y + b * ca);
+        p.lineTo(x - a * ca, y - a * sa);
+        p.lineTo(x + b * sa, y - b * ca);
+        p.close();
+    }
+
+    /** The calavera: the bone, the decoration, the teeth. Its speed and ring go over it. */
+    private void drawSkull(Canvas c, float cx, float cy, float u) {
+        float top = cy - 150f * u, jaw = cy + 150f * u;
+        // Bone.
+        path.reset();
+        path.moveTo(cx, top);
+        path.cubicTo(cx + 110f * u, top, cx + 148f * u, cy - 70f * u, cx + 142f * u, cy + 8f * u);
+        path.cubicTo(cx + 140f * u, cy + 48f * u, cx + 112f * u, cy + 62f * u, cx + 84f * u, cy + 74f * u);
+        path.lineTo(cx + 78f * u, jaw - 8f * u);
+        path.quadTo(cx, jaw + 6f * u, cx - 78f * u, jaw - 8f * u);
+        path.lineTo(cx - 84f * u, cy + 74f * u);
+        path.cubicTo(cx - 112f * u, cy + 62f * u, cx - 140f * u, cy + 48f * u, cx - 142f * u, cy + 8f * u);
+        path.cubicTo(cx - 148f * u, cy - 70f * u, cx - 110f * u, top, cx, top);
+        path.close();
+        fill.setColor(BONE);
+        c.drawPath(path, fill);
+        line.setColor(PINK);
+        line.setStrokeWidth(3f * u);
+        c.drawPath(path, line);
+        // A band of scallops under the forehead, where the speed stands above.
+        line.setColor(PINK);
+        line.setStrokeWidth(2.5f * u);
+        for (int i = -4; i < 4; i++) {
+            float x = cx + i * 26f * u;
+            r.set(x, cy - 54f * u, x + 26f * u, cy - 28f * u);
+            c.drawArc(r, 0, 180, false, line);
+        }
+        fill.setColor(TURQUOISE);
+        for (int i = -4; i <= 4; i++) c.drawCircle(cx + i * 26f * u, cy - 41f * u, 3f * u, fill);
+        // Eyes: dark sockets with a marigold each, a ring of dots round them.
+        for (int side = -1; side <= 1; side += 2) {
+            float ex = cx + side * 62f * u, ey = cy + 4f * u;
+            fill.setColor(INK);
+            c.drawCircle(ex, ey, 36f * u, fill);
+            drawFlower(c, ex, ey, 31f * u, MARIGOLD, GOLD, 0xFFE06A00);
+            fill.setColor(PINK);
+            for (int i = 0; i < 14; i++) {
+                double a = Math.PI * 2 * i / 14;
+                c.drawCircle(ex + (float) Math.cos(a) * 43f * u, ey + (float) Math.sin(a) * 43f * u, 2.5f * u, fill);
+            }
+            // A small flower on each cheek.
+            drawFlower(c, cx + side * 92f * u, cy + 56f * u, 10f * u, 0xFF9B5CFF, 0xFFD2B8FF, 0xFF6A32C8);
+        }
+        // Nose: an upside-down heart.
+        path.reset();
+        path.moveTo(cx, cy + 30f * u);
+        path.cubicTo(cx + 18f * u, cy + 46f * u, cx + 20f * u, cy + 66f * u, cx + 8f * u, cy + 66f * u);
+        path.quadTo(cx + 2f * u, cy + 66f * u, cx, cy + 58f * u);
+        path.quadTo(cx - 2f * u, cy + 66f * u, cx - 8f * u, cy + 66f * u);
+        path.cubicTo(cx - 20f * u, cy + 66f * u, cx - 18f * u, cy + 46f * u, cx, cy + 30f * u);
+        path.close();
+        fill.setColor(INK);
+        c.drawPath(path, fill);
+        // Teeth: a smile stitched across.
+        line.setColor(INK);
+        line.setStrokeWidth(3f * u);
+        float my = cy + 106f * u;
+        path.reset();
+        path.moveTo(cx - 70f * u, my - 6f * u);
+        path.quadTo(cx, my + 12f * u, cx + 70f * u, my - 6f * u);
+        c.drawPath(path, line);
+        line.setStrokeWidth(2.5f * u);
+        for (int i = -5; i <= 5; i++) {
+            float x = cx + i * 12f * u;
+            float y = my + 3f * u * (1f - (i * i) / 25f);
+            c.drawLine(x, y - 15f * u, x, y + 15f * u, line);
+        }
+        // The chin's little flower.
+        drawFlower(c, cx, jaw - 13f * u, 10f * u, PINK, 0xFFFFA8D4, 0xFFC4186E);
+    }
+
+    private void drawAltarCloth(Canvas c, int w, float u) {
+        float rr = w - 28f * u, l = rr - 300f * u, t = 340f * u, b = 548f * u;
+        r.set(l, t, rr, b);
+        fill.setColor(CLOTH);
+        c.drawRoundRect(r, 10f * u, 10f * u, fill);
+        // A fringe of paper colours on top.
+        float seg = (rr - l) / 15f;
+        for (int i = 0; i < 15; i++) {
+            fill.setColor(PAPER[i % PAPER.length]);
+            path.reset();
+            path.moveTo(l + i * seg, t);
+            path.lineTo(l + (i + 1) * seg, t);
+            path.lineTo(l + (i + 0.5f) * seg, t + 13f * u);
+            path.close();
+            c.drawPath(path, fill);
+        }
+    }
+
+    /** The tier the candles stand on. */
+    private void drawCandleStands(Canvas c, float u) {
+        float l = 28f * u, rr = l + 300f * u, b = 548f * u;
+        r.set(l, b - 26f * u, rr, b);
+        fill.setColor(CLOTH);
+        c.drawRoundRect(r, 6f * u, 6f * u, fill);
+        float seg = (rr - l) / 15f;
+        for (int i = 0; i < 15; i++) {
+            fill.setColor(PAPER[i % PAPER.length]);
+            path.reset();
+            path.moveTo(l + i * seg, b - 26f * u);
+            path.lineTo(l + (i + 1) * seg, b - 26f * u);
+            path.lineTo(l + (i + 0.5f) * seg, b - 15f * u);
+            path.close();
+            c.drawPath(path, fill);
+        }
+    }
+
+    // ---------- Papel picado: the battery ----------
+
+    private void drawFlags(Canvas c, int w, float u) {
+        boolean low = v.socPercent != null && v.socPercent < 20f;
+        int lit = Tally.lit(v.socPercent, 10f, FLAGS);
+        float fw = 100f * u, gap = (w - FLAGS * fw) / (FLAGS + 1f);
+        fill.setStyle(Paint.Style.FILL);
+        for (int i = 0; i < FLAGS; i++) {
+            float x = gap + i * (fw + gap);
+            c.save();
+            c.translate(x, 12f * u);
+            // The breeze of driving; still when parked.
+            c.skew((float) Math.sin(time * 2.2f + i * 0.8f) * 0.05f, 0);
+            boolean on = i < lit;
+            fill.setColor(!on ? 0x38FFFFFF : low ? RED : PAPER[i % PAPER.length]);
+            c.drawPath(flag, fill);
+            c.restore();
+        }
+    }
+
+    private void drawBattery(Canvas c, float u) {
+        boolean low = v.socPercent != null && v.socPercent < 20f;
+        float x = 36f * u;
+        label(c, low ? "BATTERY LOW" : "BATTERY", x, 134f * u, 19f * u, low ? RED : GOLD, face, Paint.Align.LEFT);
+        label(c, fmt(v.socPercent, "%.0f %%", "—"), x, 200f * u, 66f * u, low ? RED : BONE, serif, Paint.Align.LEFT);
+    }
+
+    // ---------- The marigold ring: the power ----------
+
+    private void drawRing(Canvas c, float cx, float cy, float u) {
+        float rad = 188f * u, half = marigold.getWidth() / 2f;
+        int lit = Tally.ofPower(v.powerKw, 150f, 50f, PETALS);
+        boolean regen = v.powerKw != null && v.powerKw < 0f;
+        for (int i = 0; i < PETALS; i++) {
+            // Clockwise from the top; regeneration runs the other way.
+            int k = regen ? PETALS - i : i;
+            double a = Math.PI * 2 * k / PETALS - Math.PI / 2;
+            float x = cx + (float) Math.cos(a) * rad, y = cy + (float) Math.sin(a) * rad;
+            boolean on = i < lit;
+            image.setAlpha(on ? 255 : 46);
+            c.drawBitmap(on && regen ? turquoise : marigold, x - half, y - half, image);
+        }
+        image.setAlpha(255);
+        // The power's number on a plate at the foot of the ring.
+        String power = v.powerKw == null ? "— kW" : String.format(Locale.US, regen ? "+%.1f kW" : "%.1f kW",
+                Math.abs(v.powerKw));
+        float py = cy + rad + 2f * u;
+        r.set(cx - 78f * u, py - 22f * u, cx + 78f * u, py + 20f * u);
+        fill.setColor(0xF02C1242);
+        c.drawRoundRect(r, 20f * u, 20f * u, fill);
+        line.setColor(regen ? TURQUOISE : MARIGOLD);
+        line.setStrokeWidth(2f * u);
+        c.drawRoundRect(r, 20f * u, 20f * u, line);
+        label(c, power, cx, py + 10f * u, 28f * u, regen ? TURQUOISE : GOLD, face, Paint.Align.CENTER);
+    }
+
+    private void drawSpeed(Canvas c, float cx, float cy, float u) {
+        label(c, fmt(v.speedKmh, "%.0f", "—"), cx, cy - 66f * u, 74f * u, INK, serif, Paint.Align.CENTER);
+        label(c, "KM/H", cx, cy - 128f * u, 14f * u, 0xFFC4186E, face, Paint.Align.CENTER);
+    }
+
+    // ---------- Candles: the range ----------
+
+    private void drawCandles(Canvas c, float u, boolean moving) {
+        float x0 = 36f * u;
+        label(c, "RANGE", x0, 246f * u, 19f * u, GOLD, face, Paint.Align.LEFT);
+        label(c, fmt(v.rangeKm, "%.0f km", "—"), x0, 298f * u, 48f * u, BONE, serif, Paint.Align.LEFT);
+        int lit = Tally.lit(v.rangeKm, 50f, CANDLES);
+        float base = 522f * u, step = 36f * u;
+        for (int i = 0; i < CANDLES; i++) {
+            float x = x0 + 14f * u + i * step;
+            float tall = (130f - (i % 4) * 22f - (i % 3) * 8f) * u;
+            float top = base - tall;
+            r.set(x - 11f * u, top, x + 11f * u, base);
+            boolean on = i < lit;
+            fill.setColor(on ? WAX : 0x40F4E6C8);
+            c.drawRoundRect(r, 3f * u, 3f * u, fill);
+            // A band of colour.
+            r.set(x - 11f * u, top + tall * 0.55f, x + 11f * u, top + tall * 0.55f + 10f * u);
+            fill.setColor(AccentColor.withAlpha(PAPER[i % PAPER.length], on ? 0xFF : 0x40));
+            c.drawRect(r, fill);
+            // The wick.
+            line.setColor(on ? INK : 0x60FFFFFF);
+            line.setStrokeWidth(2f * u);
+            c.drawLine(x, top, x, top - 6f * u, line);
+            if (!on) continue;
+            // The flame, flickering only while driving, with its halo.
+            float flick = moving ? (float) Math.sin(time * 9f + i * 1.7f) * 2.5f * u : 0f;
+            fill.setColor(0x33FFB84A);
+            c.drawCircle(x, top - 18f * u, 19f * u, fill);
+            path.reset();
+            path.moveTo(x, top - 32f * u - Math.abs(flick));
+            path.quadTo(x + 10f * u + flick, top - 12f * u, x, top - 4f * u);
+            path.quadTo(x - 10f * u + flick, top - 12f * u, x, top - 32f * u - Math.abs(flick));
+            path.close();
+            fill.setColor(FLAME);
+            c.drawPath(path, fill);
+        }
+    }
+
+    // ---------- The petal path: the last two minutes of power ----------
+
+    private void drawPetals(Canvas c, int w, int h, float u) {
+        float base = h - 16f * u, amp = 58f * u;
+        float[] trail = v.powerTrail;
+        // The path itself, faint, whatever the readings.
+        fill.setColor(0x30FF9A1F);
+        r.set(0, base - 4f * u, w, base + 4f * u);
+        c.drawRect(r, fill);
+        if (trail == null || trail.length == 0) return;
+        int n = trail.length;
+        for (int i = 0; i < n; i++) {
+            float p = trail[i];
+            if (Float.isNaN(p)) continue;
+            float x = (i + 0.5f) / n * w;
+            float share = Math.min(1f, Math.abs(p) / (p < 0 ? 40f : 60f));
+            // Each stack of petals rises with the power, each petal tilted its own way.
+            int stack = 1 + Math.round(share * 4f);
+            for (int s = 0; s < stack; s++) {
+                float y = base - s * amp / 4f;
+                c.save();
+                c.rotate(((i * 47 + s * 83) % 180) - 90f, x, y);
+                r.set(x - 8f * u, y - 3.5f * u, x + 8f * u, y + 3.5f * u);
+                fill.setColor(p < 0 ? TURQUOISE : s % 2 == 0 ? MARIGOLD : GOLD);
+                c.drawOval(r, fill);
+                c.restore();
+            }
+        }
+    }
+
+    // ---------- The right side ----------
+
+    /** The clock in a tin frame. */
+    private void drawClock(Canvas c, int w, float u) {
+        float rr = w - 28f * u, l = rr - 300f * u, t = 118f * u, b = 202f * u;
+        r.set(l, t, rr, b);
+        fill.setColor(0xCC160A26);
+        c.drawRoundRect(r, 12f * u, 12f * u, fill);
+        line.setColor(GOLD);
+        line.setStrokeWidth(2.5f * u);
+        c.drawRoundRect(r, 12f * u, 12f * u, line);
+        fill.setColor(GOLD);
+        for (int i = 0; i <= 12; i++) {
+            float x = l + 12f * u + i * (rr - l - 24f * u) / 12f;
+            c.drawCircle(x, t + 8f * u, 2f * u, fill);
+            c.drawCircle(x, b - 8f * u, 2f * u, fill);
+        }
+        label(c, v.clock.isEmpty() ? "—" : v.clock, (l + rr) / 2f, b - 22f * u, 50f * u, BONE, serif, Paint.Align.CENTER);
+    }
+
+    /** P R N D as four small marigolds: the one engaged in bloom. */
+    private void drawGears(Canvas c, int w, float u) {
+        float rr = w - 28f * u, l = rr - 300f * u, y = 270f * u;
+        String[] gears = { "P", "R", "N", "D" };
+        String now = Gear.label(v.gear);
+        float step = (rr - l) / 4f, half = marigold.getWidth() / 2f, scale = 58f * u / marigold.getWidth();
+        for (int i = 0; i < gears.length; i++) {
+            float x = l + (i + 0.5f) * step;
+            boolean on = gears[i].equals(now);
+            if (on) {
+                c.save();
+                c.scale(scale, scale, x, y);
+                c.drawBitmap(marigold, x - half, y - half, image);
+                c.restore();
+            } else {
+                fill.setColor(0x40FFFFFF);
+                c.drawCircle(x, y, 22f * u, fill);
+            }
+            label(c, gears[i], x, y + 11f * u, 30f * u, on ? INK : 0xB0FFFFFF, serif, Paint.Align.CENTER);
+        }
+    }
+
+    /** Trip, usage, climate, odometer on the altar cloth. */
+    private void drawRows(Canvas c, int w, int h, float u) {
+        float rr = w - 28f * u, l = rr - 300f * u, top = 378f * u;
+        String[][] rows = {
+                { "TRIP", fmt(v.tripKm, "%.1f km", "—") },
+                { "5 MIN", fmt(v.usage5Min, "%.1f kWh/100", "—") },
+                { "SINCE START", fmt(v.usageTrip, "%.1f kWh/100", "—") },
+                { "CLIMATE", fmt(v.climateCelsius, "%.0f °C", "—") },
+                { "ODOMETER", fmt(v.odometerKm, "%,.0f km", "—") },
+        };
+        for (int i = 0; i < rows.length; i++) {
+            float y = top + i * 35f * u;
+            label(c, rows[i][0], l + 18f * u, y, 19f * u, GOLD, thin, Paint.Align.LEFT);
+            label(c, rows[i][1], rr - 18f * u, y, 23f * u, BONE, face, Paint.Align.RIGHT);
+        }
+    }
+}

app/src/main/java/com/evsuite/abrp/MusicPulse.java

@@ -0,0 +1,51 @@
+package com.evsuite.abrp;
+
+/**
+ * How strongly the Halloween pumpkin's light answers the music at this moment, from 0 to 1, out of
+ * the kick drum's band the audio analyser reports. What counts is the hit, not the loudness: only
+ * a jump of the bass since the last reading lights it, measured against the biggest jumps of the
+ * last seconds, so quiet and loud songs both flash, and a held bass note or a steady hum does not.
+ * Jumps that are small against the bass's own level (a swelling note, noise) are ignored. It
+ * flares at once and dies down within a beat, as a flame does. No reading or silence falls back to
+ * 0, so without music the light stays as it is. Android-free and unit-tested.
+ */
+final class MusicPulse {
+
+    /** Below this the bass counts as silence. */
+    static final float SILENT = 0.005f;
+    /** The kick drum's band, in Hz, that {@link MusicTap} reads. */
+    static final float FROM_HZ = 40f, TO_HZ = 120f;
+    private static final float FALL_S = 0.2f, AVERAGE_S = 2f, PEAK_S = 4f;
+    /** A jump below this share of the recent biggest one lights nothing. */
+    private static final float THRESHOLD = 0.2f;
+    /** A jump has to be at least this share of the bass's average level to count at all. */
+    private static final float LEVEL_SHARE = 0.5f;
+
+    private float last, average, peakJump, pulse;
+
+    /** One reading, {@code seconds} after the last; null when it failed. Returns the new pulse. */
+    float update(Float bass, float seconds) {
+        float target = 0f;
+        if (bass == null || bass.isNaN() || bass < SILENT) {
+            last = 0f;
+            average = 0f;
+            peakJump = 0f;
+        } else {
+            float jump = Math.max(0f, bass - last);
+            last = bass;
+            average = average == 0f ? bass : average + (bass - average) * share(seconds, AVERAGE_S);
+            peakJump = Math.max(jump, peakJump - peakJump * share(seconds, PEAK_S));
+            float reference = Math.max(peakJump, average * LEVEL_SHARE);
+            if (reference > 0f) {
+                target = Math.max(0f, Math.min(1f, (jump / reference - THRESHOLD) / (1f - THRESHOLD)));
+            }
+        }
+        pulse = target > pulse ? target : pulse + (target - pulse) * share(seconds, FALL_S);
+        if (pulse < 0.005f) pulse = 0f;
+        return pulse;
+    }
+
+    private static float share(float seconds, float timeConstant) {
+        return Math.min(1f, Math.max(0f, seconds) / timeConstant);
+    }
+}

app/src/main/java/com/evsuite/abrp/MusicTap.java

@@ -0,0 +1,91 @@
+package com.evsuite.abrp;
+
+import android.Manifest;
+import android.content.Context;
+import android.content.pm.PackageManager;
+import android.media.audiofx.Visualizer;
+
+/**
+ * Listens to what the head unit plays for the Halloween pumpkin's light: Android's audio analyser
+ * on the output mix, its kick-drum band read 25 times a second on a thread of its own, made into a
+ * {@link MusicPulse}. Runs only while MainActivity says so (the style on screen, the app in
+ * front, and "Pumpkin light follows the music" on). Levels only: no sound is kept and no microphone used. Where the analyser hears nothing
+ * (the radio) or is not available, the pulse stays 0 and the pumpkin burns as usual.
+ */
+final class MusicTap {
+
+    private static final int READ_MS = 40, GIVE_UP_AFTER_FAILURES = 50;
+
+    private final Context app;
+    private volatile Thread worker;
+    private volatile float pulse;
+
+    MusicTap(Context context) {
+        app = context.getApplicationContext();
+    }
+
+    /** From 0 to 1; safe to read from any thread. */
+    float pulse() {
+        return pulse;
+    }
+
+    void setRunning(boolean run) {
+        if (run == (worker != null)) return;
+        if (!run) {
+            Thread stopping = worker;
+            worker = null;
+            pulse = 0f;
+            stopping.interrupt();
+            return;
+        }
+        if (app.checkSelfPermission(Manifest.permission.RECORD_AUDIO) != PackageManager.PERMISSION_GRANTED) return;
+        Thread thread = new Thread(this::listen, "music-tap");
+        thread.setDaemon(true);
+        worker = thread;
+        thread.start();
+    }
+
+    /** All analyser calls live here, off the main thread; it is always let go. */
+    private void listen() {
+        Thread me = Thread.currentThread();
+        Visualizer analyser = null;
+        try {
+            analyser = new Visualizer(0);
+            analyser.setCaptureSize(Visualizer.getCaptureSizeRange()[1]);
+            analyser.setScalingMode(Visualizer.SCALING_MODE_NORMALIZED);
+            if (analyser.setEnabled(true) != Visualizer.SUCCESS) return;
+            int rateHz = analyser.getSamplingRate() / 1000;
+            byte[] fft = new byte[analyser.getCaptureSize()];
+            MusicPulse music = new MusicPulse();
+            long last = System.nanoTime();
+            int failures = 0;
+            while (worker == me && failures < GIVE_UP_AFTER_FAILURES) {
+                Thread.sleep(READ_MS);
+                boolean read = analyser.getFft(fft) == Visualizer.SUCCESS;
+                failures = read ? 0 : failures + 1;
+                long now = System.nanoTime();
+                float value = music.update(read ? SoundLevels.band(fft, rateHz, MusicPulse.FROM_HZ, MusicPulse.TO_HZ) : null, (now - last) / 1e9f);
+                last = now;
+                if (worker == me) pulse = value;
+            }
+        } catch (InterruptedException e) {
+            // Told to stop.
+        } catch (RuntimeException e) {
+            // No analyser here: the pumpkin burns as usual.
+        } finally {
+            if (worker == me) pulse = 0f;
+            if (analyser != null) {
+                try {
+                    analyser.setEnabled(false);
+                } catch (RuntimeException ignored) {
+                    // Released next either way.
+                }
+                try {
+                    analyser.release();
+                } catch (RuntimeException ignored) {
+                    // Nothing more can be done from here.
+                }
+            }
+        }
+    }
+}

app/src/main/java/com/evsuite/abrp/NowPlaying.java

@@ -0,0 +1,136 @@
+package com.evsuite.abrp;
+
+import java.util.List;
+import java.util.Locale;
+import java.util.regex.Pattern;
+
+/**
+ * What the Overview shows as playing, out of the media sessions the head unit publishes
+ * ({@link NowPlayingWatcher}): the session that plays, the one updated last when several do, and
+ * when none plays the one paused last. Sessions without any text are passed over (Bluetooth leaves
+ * an empty one behind when the phone stops). The text is cleaned: CarPlay's YouTube titles lose
+ * their trailing video ID, and the radio, whose title is the station and whose artist field is the
+ * station's own text, shows that text with the station below. Shown on screen only; nothing here
+ * is logged or sent. Android-free and unit-tested.
+ */
+final class NowPlaying {
+
+    enum Source { BLUETOOTH, CARPLAY, RADIO, OTHER }
+
+    /** android.media.session.PlaybackState's codes, mirrored to stay Android-free. */
+    static final int STATE_PAUSED = 2, STATE_PLAYING = 3, STATE_FAST_FORWARDING = 4, STATE_REWINDING = 5,
+            STATE_BUFFERING = 6, STATE_SKIPPING_TO_PREVIOUS = 9, STATE_SKIPPING_TO_NEXT = 10,
+            STATE_SKIPPING_TO_QUEUE_ITEM = 11;
+
+    private static final int MAX_TEXT = 200;
+    /** A YouTube video ID in brackets at the end of a title, as CarPlay passes them on. */
+    private static final Pattern VIDEO_ID = Pattern.compile("\\s*\\[[A-Za-z0-9_-]{11}\\]$");
+    private static final Pattern SPACES = Pattern.compile("\\s+");
+
+    private NowPlaying() {}
+
+    /** One media session as last seen. Times in the platform's elapsed-realtime milliseconds. */
+    static final class Session {
+        String packageName;
+        int state;
+        String title, artist;
+        /** -1 when the session says no position. */
+        long positionMs = -1;
+        long positionUpdatedAt;
+        float speed = 1f;
+        /** 0 when unknown (the radio). */
+        long durationMs;
+        /** A file or content URI for the cover, when the session names one (Bluetooth does). */
+        String artUri;
+    }
+
+    /** What to show. {@code subtitle} may be null; {@code session} is where it came from. */
+    static final class Track {
+        final Source source;
+        final String title, subtitle;
+        final boolean playing;
+        final Session session;
+
+        Track(Source source, String title, String subtitle, boolean playing, Session session) {
+            this.source = source;
+            this.title = title;
+            this.subtitle = subtitle;
+            this.playing = playing;
+            this.session = session;
+        }
+
+        /** Where the song is at {@code now}, or -1 when the session gives no position. */
+        long positionAt(long now) {
+            if (session.positionMs < 0) return -1;
+            long at = session.positionMs;
+            if (playing && session.positionUpdatedAt > 0 && now > session.positionUpdatedAt) {
+                at += (long) ((now - session.positionUpdatedAt) * session.speed);
+            }
+            if (session.durationMs > 0) at = Math.min(at, session.durationMs);
+            return Math.max(0, at);
+        }
+
+        /** How far through the song, from 0 to 1, or -1 without a length or position (the radio). */
+        float progressAt(long now) {
+            long at = positionAt(now);
+            if (at < 0 || session.durationMs <= 0) return -1f;
+            return Math.min(1f, at / (float) session.durationMs);
+        }
+    }
+
+    static Track pick(List<Session> sessions) {
+        Session best = null;
+        boolean bestPlaying = false;
+        if (sessions != null) {
+            for (Session s : sessions) {
+                if (s == null || (!playing(s.state) && s.state != STATE_PAUSED)) continue;
+                if (clean(s.title) == null && clean(s.artist) == null) continue;
+                boolean p = playing(s.state);
+                if (best == null || (p && !bestPlaying)
+                        || (p == bestPlaying && s.positionUpdatedAt > best.positionUpdatedAt)) {
+                    best = s;
+                    bestPlaying = p;
+                }
+            }
+        }
+        if (best == null) return null;
+        Source source = source(best.packageName);
+        String title = clean(best.title), artist = clean(best.artist);
+        if (source == Source.RADIO) {
+            // The station is the title; its own text (song, programme) comes as the artist.
+            if (artist != null) return new Track(source, artist, title, bestPlaying, best);
+            return new Track(source, title, null, bestPlaying, best);
+        }
+        if (title == null) return new Track(source, artist, null, bestPlaying, best);
+        return new Track(source, title, artist, bestPlaying, best);
+    }
+
+    static boolean playing(int state) {
+        switch (state) {
+            case STATE_PLAYING: case STATE_FAST_FORWARDING: case STATE_REWINDING: case STATE_BUFFERING:
+            case STATE_SKIPPING_TO_PREVIOUS: case STATE_SKIPPING_TO_NEXT: case STATE_SKIPPING_TO_QUEUE_ITEM:
+                return true;
+            default:
+                return false;
+        }
+    }
+
+    /** Which source a session's app is: the ones seen on the owner's car, the rest as "other". */
+    static Source source(String packageName) {
+        if (packageName == null) return Source.OTHER;
+        String p = packageName.toLowerCase(Locale.ROOT);
+        if (p.equals("com.android.bluetooth")) return Source.BLUETOOTH;
+        if (p.contains("allgo") || p.contains("carplay")) return Source.CARPLAY;
+        if (p.contains("radio")) return Source.RADIO;
+        return Source.OTHER;
+    }
+
+    /** Trimmed, one line, without a trailing video ID, at most 200 characters; null when empty. */
+    static String clean(String text) {
+        if (text == null) return null;
+        String s = SPACES.matcher(text).replaceAll(" ").trim();
+        s = VIDEO_ID.matcher(s).replaceAll("").trim();
+        if (s.isEmpty()) return null;
+        return s.length() > MAX_TEXT ? s.substring(0, MAX_TEXT - 1) + "…" : s;
+    }
+}

app/src/main/java/com/evsuite/abrp/NowPlayingWatcher.java

@@ -0,0 +1,215 @@
+package com.evsuite.abrp;
+
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.media.MediaMetadata;
+import android.media.session.MediaController;
+import android.media.session.MediaSessionManager;
+import android.media.session.PlaybackState;
+import android.net.Uri;
+import android.os.Handler;
+import android.os.Looper;
+
+import java.io.InputStream;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+/**
+ * Watches the media sessions the head unit publishes (Bluetooth's, CarPlay's, the radio's) for the
+ * Overview's "now playing", the way the Logs tab's music-sources check reads them: through
+ * {@code MediaSessionManager}, which needs MEDIA_CONTENT_CONTROL (the car build has it as the
+ * system user). It only listens: no media browser service is connected to (that stopped the music
+ * in 2.42.0) and no command is sent. Each session's state and song are kept as the session reports
+ * changes, so reading {@link #current()} costs no call into another app. Runs only while
+ * MainActivity says so, on the main thread. Without the permission, or on any failure, there is
+ * simply nothing playing. Nothing it sees is logged.
+ */
+final class NowPlayingWatcher {
+
+    private static final int COVER_PX = 160;
+
+    private final Context app;
+    private final Handler main = new Handler(Looper.getMainLooper());
+    private final List<Watched> watched = new ArrayList<>();
+    private final ExecutorService coverLoader = Executors.newSingleThreadExecutor(r -> {
+        Thread t = new Thread(r, "now-playing-cover");
+        t.setDaemon(true);
+        return t;
+    });
+    private MediaSessionManager sessions;
+    private boolean running;
+    private Bitmap sessionCover;
+    /** The file cover asked for last and what came of it, from the loader thread. */
+    private volatile String coverUri;
+    private volatile Bitmap fileCover;
+
+    private final MediaSessionManager.OnActiveSessionsChangedListener changed = this::watch;
+
+    NowPlayingWatcher(Context context) {
+        app = context.getApplicationContext();
+    }
+
+    void setRunning(boolean run) {
+        if (run == running) return;
+        running = run;
+        if (!run) {
+            try {
+                if (sessions != null) sessions.removeOnActiveSessionsChangedListener(changed);
+            } catch (RuntimeException ignored) {
+                // Gone with the listener either way.
+            }
+            watch(null);
+            return;
+        }
+        try {
+            sessions = (MediaSessionManager) app.getSystemService(Context.MEDIA_SESSION_SERVICE);
+            if (sessions == null) return;
+            sessions.addOnActiveSessionsChangedListener(changed, null, main);
+            watch(sessions.getActiveSessions(null));
+        } catch (RuntimeException e) {
+            // No permission (the stable build) or no session service: nothing plays.
+            android.util.Log.w("NowPlaying", "Media sessions not readable: " + e.getClass().getSimpleName());
+        }
+    }
+
+    boolean isRunning() {
+        return running;
+    }
+
+    /** What plays now, or null. */
+    NowPlaying.Track current() {
+        List<NowPlaying.Session> seen = new ArrayList<>(watched.size());
+        for (Watched w : watched) seen.add(w.seen);
+        return NowPlaying.pick(seen);
+    }
+
+    /** The current track's cover, or null: the picture the session carries, else its file, once loaded. */
+    Bitmap cover(NowPlaying.Track track) {
+        if (track == null) return null;
+        for (Watched w : watched) {
+            if (w.seen == track.session && w.cover != null) return w.cover;
+        }
+        String uri = track.session.artUri;
+        if (uri == null) return null;
+        if (!uri.equals(coverUri)) {
+            coverUri = uri;
+            fileCover = null;
+            coverLoader.execute(() -> {
+                Bitmap b = load(uri);
+                if (uri.equals(coverUri)) fileCover = b;
+            });
+        }
+        return fileCover;
+    }
+
+    private void watch(List<MediaController> controllers) {
+        for (Watched w : watched) w.release();
+        watched.clear();
+        if (controllers == null || !running) return;
+        for (MediaController c : controllers) {
+            try {
+                watched.add(new Watched(c));
+            } catch (RuntimeException ignored) {
+                // A session that went away while being read.
+            }
+        }
+    }
+
+    /** One session: its last state and song, kept up to date by its callback. */
+    private final class Watched extends MediaController.Callback {
+        final MediaController controller;
+        final NowPlaying.Session seen = new NowPlaying.Session();
+        Bitmap cover;
+
+        Watched(MediaController c) {
+            controller = c;
+            seen.packageName = c.getPackageName();
+            onPlaybackStateChanged(c.getPlaybackState());
+            onMetadataChanged(c.getMetadata());
+            c.registerCallback(this, main);
+        }
+
+        void release() {
+            try {
+                controller.unregisterCallback(this);
+            } catch (RuntimeException ignored) {
+                // Already gone.
+            }
+        }
+
+        @Override
+        public void onPlaybackStateChanged(PlaybackState state) {
+            seen.state = state == null ? 0 : state.getState();
+            seen.positionMs = state == null ? -1 : state.getPosition();
+            seen.positionUpdatedAt = state == null ? 0 : state.getLastPositionUpdateTime();
+            seen.speed = state == null ? 1f : state.getPlaybackSpeed();
+        }
+
+        @Override
+        public void onMetadataChanged(MediaMetadata m) {
+            seen.title = text(m, MediaMetadata.METADATA_KEY_TITLE);
+            if (seen.title == null) seen.title = text(m, MediaMetadata.METADATA_KEY_DISPLAY_TITLE);
+            seen.artist = text(m, MediaMetadata.METADATA_KEY_ARTIST);
+            if (seen.artist == null) seen.artist = text(m, MediaMetadata.METADATA_KEY_DISPLAY_SUBTITLE);
+            seen.durationMs = m == null ? 0 : Math.max(0, m.getLong(MediaMetadata.METADATA_KEY_DURATION));
+            cover = picture(m);
+            seen.artUri = text(m, MediaMetadata.METADATA_KEY_ALBUM_ART_URI);
+            if (seen.artUri == null) seen.artUri = text(m, MediaMetadata.METADATA_KEY_ART_URI);
+        }
+
+        @Override
+        public void onSessionDestroyed() {
+            seen.state = 0;
+        }
+    }
+
+    private static String text(MediaMetadata m, String key) {
+        if (m == null) return null;
+        try {
+            CharSequence s = m.getText(key);
+            return s == null ? null : s.toString();
+        } catch (RuntimeException e) {
+            return null;
+        }
+    }
+
+    private static Bitmap picture(MediaMetadata m) {
+        if (m == null) return null;
+        for (String key : new String[] { MediaMetadata.METADATA_KEY_ALBUM_ART, MediaMetadata.METADATA_KEY_ART,
+                MediaMetadata.METADATA_KEY_DISPLAY_ICON }) {
+            try {
+                Bitmap b = m.getBitmap(key);
+                if (b != null && b.getWidth() > 1 && b.getHeight() > 1) return b;
+            } catch (RuntimeException ignored) {
+                // Try the next.
+            }
+        }
+        return null;
+    }
+
+    /** A cover file, made small; null when it cannot be read. Off the main thread. */
+    private Bitmap load(String uri) {
+        try {
+            Uri u = uri.startsWith("/") ? Uri.fromFile(new java.io.File(uri)) : Uri.parse(uri);
+            String scheme = u.getScheme();
+            if (!"file".equals(scheme) && !"content".equals(scheme)) return null;
+            BitmapFactory.Options size = new BitmapFactory.Options();
+            size.inJustDecodeBounds = true;
+            try (InputStream in = app.getContentResolver().openInputStream(u)) {
+                BitmapFactory.decodeStream(in, null, size);
+            }
+            if (size.outWidth <= 0 || size.outHeight <= 0) return null;
+            BitmapFactory.Options small = new BitmapFactory.Options();
+            small.inSampleSize = 1;
+            while (Math.max(size.outWidth, size.outHeight) / (small.inSampleSize * 2) >= COVER_PX) small.inSampleSize *= 2;
+            try (InputStream in = app.getContentResolver().openInputStream(u)) {
+                return BitmapFactory.decodeStream(in, null, small);
+            }
+        } catch (Exception | OutOfMemoryError e) {
+            return null;
+        }
+    }
+}

app/src/main/java/com/evsuite/abrp/OverviewStyle.java

@@ -31,7 +31,9 @@ enum OverviewStyle {
     TIME_CIRCUITS(false, false),
     QUEST(false, false),
     VISOR(true, true),
-    EMPIRE(false, false);
+    EMPIRE(false, false),
+    MUERTOS(false, false),
+    HALLOWEEN(false, false);
 
     static final String PREF_KEY = "overview_style";
 

app/src/main/java/com/evsuite/abrp/SoundLevels.java

@@ -0,0 +1,108 @@
+package com.evsuite.abrp;
+
+import java.util.Locale;
+
+/**
+ * What {@link SoundProbe} makes of Android's audio analyser: how loud a captured waveform is, how
+ * strong a band of its spectrum, and whether a run of those looks like music the analyser can
+ * hear. A failed read is null, never a silent 0. Android-free and unit-tested.
+ */
+final class SoundLevels {
+
+    /** Below this the peak counts as silence (the 8-bit waveform's noise is about 1/128). */
+    static final float SILENT = 0.02f;
+
+    private SoundLevels() {}
+
+    /** The waveform's peak from 0 to 1. Its samples are unsigned 8-bit, with silence at 128. */
+    static Float peak(byte[] wave) {
+        if (wave == null || wave.length == 0) return null;
+        int max = 0;
+        for (byte b : wave) max = Math.max(max, Math.abs((b & 0xFF) - 128));
+        return Math.min(1f, max / 128f);
+    }
+
+    /**
+     * The mean strength from 0 to 1 of the bins between {@code fromHz} and {@code toHz}. The
+     * analyser's FFT holds the DC and Nyquist values first, then each bin's real and imaginary
+     * part, signed; a bin {@code k} is {@code k × rate / length} Hz.
+     */
+    static Float band(byte[] fft, int rateHz, float fromHz, float toHz) {
+        if (fft == null || fft.length < 4 || rateHz <= 0) return null;
+        float sum = 0f;
+        int bins = 0;
+        for (int k = 1; k < fft.length / 2; k++) {
+            float hz = k * (float) rateHz / fft.length;
+            if (hz < fromHz || hz >= toHz) continue;
+            sum += (float) Math.hypot(fft[2 * k], fft[2 * k + 1]) / 128f;
+            bins++;
+        }
+        return bins == 0 ? null : Math.min(1f, sum / bins);
+    }
+
+    enum Verdict {
+        /** The analyser gave no readings at all. */
+        NO_READING,
+        /** Nothing was playing and the analyser heard nothing: says nothing about the source. */
+        NOTHING_PLAYING,
+        /** Something played and the analyser heard silence: it cannot hear this source. */
+        DEAF,
+        /** The level stays where it is: not music, or not real data. */
+        STEADY,
+        /** The level moves: the pumpkin could follow it. */
+        HEARS
+    }
+
+    /** Readings gathered over a time. */
+    static final class Summary {
+        private int samples, readings, bandReadings;
+        private float peakMin = Float.MAX_VALUE, peakMax, bass, mid, treble;
+        private Integer rms;
+
+        /** One round of reads, each null when it failed. */
+        void add(Float peak, Float bassBand, Float midBand, Float trebleBand, Integer rmsMilliBel) {
+            samples++;
+            if (peak != null) {
+                readings++;
+                peakMin = Math.min(peakMin, peak);
+                peakMax = Math.max(peakMax, peak);
+            }
+            if (bassBand != null && midBand != null && trebleBand != null) {
+                bandReadings++;
+                bass += bassBand;
+                mid += midBand;
+                treble += trebleBand;
+            }
+            if (rmsMilliBel != null) rms = rmsMilliBel;
+        }
+
+        Verdict verdict(boolean somethingPlays) {
+            if (readings == 0) return Verdict.NO_READING;
+            if (peakMax < SILENT) return somethingPlays ? Verdict.DEAF : Verdict.NOTHING_PLAYING;
+            return peakMax - peakMin < SILENT ? Verdict.STEADY : Verdict.HEARS;
+        }
+
+        /** One line of the report; what could not be read is "—". */
+        String line() {
+            return "peak " + (readings == 0 ? "—" : String.format(Locale.US, "%.2f–%.2f", peakMin, peakMax))
+                    + ", bass " + mean(bass) + ", mid " + mean(mid) + ", treble " + mean(treble)
+                    + ", rms " + (rms == null ? "—" : rms + " mB")
+                    + " (" + readings + "/" + samples + ")";
+        }
+
+        private String mean(float sum) {
+            return bandReadings == 0 ? "—" : String.format(Locale.US, "%.3f", sum / bandReadings);
+        }
+    }
+
+    /** The report's last line. */
+    static String words(Verdict verdict) {
+        switch (verdict) {
+            case HEARS: return "Result: the analyser hears it, and the level moves.";
+            case STEADY: return "Result: the level does not move, so this is not usable music.";
+            case DEAF: return "Result: something plays, but the analyser hears silence.";
+            case NOTHING_PLAYING: return "Result: nothing was playing, so this says nothing. Play something and check again.";
+            default: return "Result: the analyser gave no readings.";
+        }
+    }
+}

app/src/main/java/com/evsuite/abrp/SoundProbe.java

@@ -0,0 +1,179 @@
+package com.evsuite.abrp;
+
+import android.Manifest;
+import android.content.Context;
+import android.content.pm.PackageManager;
+import android.media.AudioManager;
+import android.media.audiofx.Visualizer;
+import android.media.session.MediaController;
+import android.media.session.MediaSessionManager;
+import android.media.session.PlaybackState;
+
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.List;
+import java.util.Locale;
+
+/**
+ * The sound check on the Logs tab: whether Android's audio analyser ({@link Visualizer} on the
+ * output mix, session 0) can hear what the head unit plays, before the Halloween pumpkin's light
+ * follows the music. Only one tap starts it, and it listens for {@value #SECONDS} seconds and lets
+ * go. It records levels only, never the sound, and uses no microphone. The report goes where a
+ * signal recording goes ({@link SignalRecorder#saveCopies}): the app, a USB stick, the server.
+ */
+final class SoundProbe {
+
+    static final String FILE = "sound_probe.txt";
+    private static final int SECONDS = 10, READS_PER_SECOND = 10;
+
+    private static volatile boolean running;
+    private static long startedMs;
+    private static List<String> report = new ArrayList<>();
+    private static String result;
+
+    private SoundProbe() {}
+
+    static synchronized boolean running() {
+        return running;
+    }
+
+    static synchronized void start(Context context) {
+        if (running) return;
+        Context app = context.getApplicationContext();
+        running = true;
+        startedMs = System.currentTimeMillis();
+        result = null;
+        report = new ArrayList<>();
+        new Thread(() -> probe(app), "sound-probe").start();
+    }
+
+    private static void probe(Context app) {
+        List<String> out = new ArrayList<>();
+        out.add("Sound probe, " + SignalRecording.time(startedMs) + ", app " + BuildConfig.VERSION_NAME);
+        String saved;
+        try {
+            permission(app, Manifest.permission.RECORD_AUDIO, out);
+            permission(app, Manifest.permission.MODIFY_AUDIO_SETTINGS, out);
+            boolean plays = sessions(app, out);
+            plays |= musicActive(app, out);
+            SoundLevels.Summary all = listen(out);
+            plays |= musicActive(app, out);
+            out.add("");
+            out.add(SoundLevels.words(all.verdict(plays)));
+        } catch (Throwable t) {
+            out.add("probe stopped: " + t.getClass().getSimpleName());
+        } finally {
+            String name = "sound-probe-" + new SimpleDateFormat("yyyyMMdd-HHmmss", Locale.US)
+                    .format(new Date(startedMs)) + ".txt";
+            saved = SignalRecorder.saveCopies(app, FILE, name, out);
+            synchronized (SoundProbe.class) {
+                report = out;
+                result = saved;
+                running = false;
+            }
+        }
+    }
+
+    private static void permission(Context app, String name, List<String> out) {
+        boolean granted = app.checkSelfPermission(name) == PackageManager.PERMISSION_GRANTED;
+        out.add(name.substring(name.lastIndexOf('.') + 1) + ": " + (granted ? "granted" : "not granted"));
+    }
+
+    private static boolean musicActive(Context app, List<String> out) {
+        try {
+            AudioManager am = (AudioManager) app.getSystemService(Context.AUDIO_SERVICE);
+            boolean active = am != null && am.isMusicActive();
+            out.add("music active: " + active);
+            return active;
+        } catch (RuntimeException e) {
+            out.add("music active: unreadable (" + e.getClass().getSimpleName() + ")");
+            return false;
+        }
+    }
+
+    /** Which source is playing, for reading the report later; no song. True when one is. */
+    private static boolean sessions(Context app, List<String> out) {
+        boolean playing = false;
+        try {
+            MediaSessionManager msm = (MediaSessionManager) app.getSystemService(Context.MEDIA_SESSION_SERVICE);
+            List<MediaController> controllers = msm == null ? null : msm.getActiveSessions(null);
+            if (controllers == null || controllers.isEmpty()) out.add("sessions: none");
+            else for (MediaController c : controllers) {
+                PlaybackState s = c.getPlaybackState();
+                out.add("session: " + MediaProbeText.clean(c.getPackageName()) + ", "
+                        + (s == null ? "no state" : MediaProbeText.playbackState(s.getState())));
+                if (s != null && s.getState() == PlaybackState.STATE_PLAYING) playing = true;
+            }
+        } catch (Throwable t) {
+            out.add("sessions: not readable (" + t.getClass().getSimpleName() + ")");
+        }
+        return playing;
+    }
+
+    /** Listens for the whole time, one report line a second; always lets the analyser go. */
+    private static SoundLevels.Summary listen(List<String> out) throws InterruptedException {
+        SoundLevels.Summary all = new SoundLevels.Summary();
+        Visualizer analyser = null;
+        try {
+            analyser = new Visualizer(0);
+            int[] sizes = Visualizer.getCaptureSizeRange();
+            int code = analyser.setCaptureSize(sizes[1]);
+            analyser.setScalingMode(Visualizer.SCALING_MODE_NORMALIZED);
+            analyser.setMeasurementMode(Visualizer.MEASUREMENT_MODE_PEAK_RMS);
+            int enabled = analyser.setEnabled(true);
+            int size = analyser.getCaptureSize(), rateHz = analyser.getSamplingRate() / 1000;
+            out.add("analyser: capture " + size + " at " + rateHz + " Hz, set size " + code + ", enable " + enabled);
+            if (enabled != Visualizer.SUCCESS) return all;
+            byte[] wave = new byte[size], fft = new byte[size];
+            Visualizer.MeasurementPeakRms measure = new Visualizer.MeasurementPeakRms();
+            for (int second = 0; second < SECONDS; second++) {
+                SoundLevels.Summary now = new SoundLevels.Summary();
+                for (int read = 0; read < READS_PER_SECOND; read++) {
+                    Thread.sleep(1000 / READS_PER_SECOND);
+                    Float peak = analyser.getWaveForm(wave) == Visualizer.SUCCESS ? SoundLevels.peak(wave) : null;
+                    boolean spectrum = analyser.getFft(fft) == Visualizer.SUCCESS;
+                    Float bass = spectrum ? SoundLevels.band(fft, rateHz, 20f, 250f) : null;
+                    Float mid = spectrum ? SoundLevels.band(fft, rateHz, 250f, 2000f) : null;
+                    Float treble = spectrum ? SoundLevels.band(fft, rateHz, 2000f, 16000f) : null;
+                    Integer rms = analyser.getMeasurementPeakRms(measure) == Visualizer.SUCCESS ? measure.mRms : null;
+                    now.add(peak, bass, mid, treble, rms);
+                    all.add(peak, bass, mid, treble, rms);
+                }
+                out.add(MediaProbeText.duration(second * 1000L) + "  " + now.line());
+            }
+        } catch (RuntimeException e) {
+            out.add("analyser not available: " + e.getClass().getSimpleName() + " " + MediaProbeText.clean(e.getMessage()));
+        } finally {
+            if (analyser != null) {
+                try {
+                    analyser.setEnabled(false);
+                } catch (RuntimeException ignored) {
+                    // Released next either way.
+                }
+                try {
+                    analyser.release();
+                } catch (RuntimeException e) {
+                    out.add("analyser not released: " + e.getClass().getSimpleName());
+                }
+            }
+        }
+        return all;
+    }
+
+    /** What the Logs tab shows: the state, then the report. */
+    static synchronized List<String> status(Context context) {
+        List<String> lines = new ArrayList<>();
+        if (startedMs == 0) return lines;
+        if (running) {
+            lines.add(context.getString(R.string.sound_probe_running));
+            return lines;
+        }
+        lines.add(context.getString(R.string.media_probe_done, SignalRecording.time(startedMs),
+                result == null ? "…" : result));
+        String sent = LogOutbox.status(context);
+        if (sent != null) lines.add(sent);
+        lines.addAll(report.subList(Math.min(1, report.size()), report.size()));
+        return lines;
+    }
+}

app/src/main/java/com/evsuite/abrp/StylePalette.java

@@ -24,6 +24,8 @@ final class StylePalette {
             case QUEST: return R.style.ThemeOverlay_EV_Style_Quest;
             case VISOR: return R.style.ThemeOverlay_EV_Style_Visor;
             case EMPIRE: return R.style.ThemeOverlay_EV_Style_Empire;
+            case MUERTOS: return R.style.ThemeOverlay_EV_Style_Muertos;
+            case HALLOWEEN: return R.style.ThemeOverlay_EV_Style_Halloween;
             default: return 0;
         }
     }

app/src/main/java/com/evsuite/abrp/Tally.java

@@ -0,0 +1,27 @@
+package com.evsuite.abrp;
+
+/**
+ * How many of a row of things a value lights: flags, candles, petals, embers, bats. An unread
+ * value lights none, never a made-up amount. Android-free and unit-tested.
+ */
+final class Tally {
+
+    private Tally() {}
+
+    /** One thing per {@code step} of the value, rounded, from 0 to {@code max}; null or NaN is 0. */
+    static int lit(Float value, float step, int max) {
+        if (value == null || value.isNaN() || step <= 0f || value <= 0f) return 0;
+        return Math.min(max, Math.round(value / step));
+    }
+
+    /**
+     * Of {@code count} things round a gauge, how many the power lights: all of them at
+     * {@code fullDraw} kW drawn, or at {@code fullRegen} kW regenerated (negative power).
+     * Any real power lights at least one, so the gauge never looks idle while it is not.
+     */
+    static int ofPower(Float kw, float fullDraw, float fullRegen, int count) {
+        if (kw == null || kw.isNaN() || Math.abs(kw) < 0.1f) return 0;
+        float share = Math.abs(kw) / (kw < 0f ? fullRegen : fullDraw);
+        return Math.max(1, Math.min(count, Math.round(share * count)));
+    }
+}

app/src/main/java/com/evsuite/abrp/UpdateDiagnosis.java

@@ -0,0 +1,69 @@
+package com.evsuite.abrp;
+
+import java.io.IOException;
+import java.net.ConnectException;
+import java.net.NoRouteToHostException;
+import java.net.SocketException;
+import java.net.SocketTimeoutException;
+import java.net.UnknownHostException;
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import javax.net.ssl.SSLException;
+
+/**
+ * Why an update check failed, in words for the update log, and what the car's networks look
+ * like. Built from an error's type and an HTTP status only, because an error's own text can carry
+ * the server's address: nothing here holds a URL or a credential. Android-free and unit-tested.
+ */
+final class UpdateDiagnosis {
+
+    private static final Pattern STATUS = Pattern.compile("^Release API returned (\\d{3})$");
+
+    private UpdateDiagnosis() {}
+
+    /** One line about a failed step. */
+    static String failure(Throwable t) {
+        if (t == null) return "unknown failure";
+        String type = " (" + t.getClass().getSimpleName() + ")";
+        if (t instanceof UnknownHostException) return "the name could not be looked up: no data connection, or no name service" + type;
+        if (t instanceof SocketTimeoutException) return "no answer in time: a very slow or blocked connection" + type;
+        if (t instanceof ConnectException || t instanceof NoRouteToHostException) return "no connection could be made" + type;
+        if (t instanceof SSLException) return "the secure connection failed: something in between may have answered, or the head unit's clock is wrong" + type;
+        if (t instanceof SocketException) return "the connection broke off" + type;
+        if (t instanceof IOException && t.getMessage() != null) {
+            Matcher status = STATUS.matcher(t.getMessage());
+            if (status.matches()) return status(Integer.parseInt(status.group(1)));
+            if (t.getMessage().equals("Invalid release response")) return "the answer was not a list of releases";
+        }
+        return "failed" + type;
+    }
+
+    /** What a status from the car server means here. */
+    static String status(int code) {
+        String what;
+        if (code >= 300 && code < 400) what = "something in between redirected it, as a SIM without data may";
+        else if (code == 401 || code == 403) what = "the server refuses the car's token";
+        else if (code == 404) what = "the server does not know this address";
+        else if (code >= 500) what = "the server or the forge behind it has a problem";
+        else what = "not what was expected";
+        return "the server answered HTTP " + code + ": " + what;
+    }
+
+    /** The outside-world test: a 204 is the internet working; anything else stands in between. */
+    static String internet(int code) {
+        if (code == 204) return "the internet works (HTTP 204)";
+        return "something in between answered HTTP " + code + " instead, as a SIM without data may";
+    }
+
+    /** One network as Android sees it. */
+    static String network(List<String> transports, boolean internet, boolean validated,
+                          boolean active, boolean roaming) {
+        return (transports.isEmpty() ? "unknown type" : String.join("+", transports))
+                + (active ? ", in use" : "")
+                + (internet ? ", offers internet" : ", no internet")
+                + (validated ? ", confirmed by Android" : ", not confirmed by Android")
+                + (roaming ? ", roaming" : "");
+    }
+}

app/src/main/java/com/evsuite/abrp/UpdateLog.java

@@ -21,7 +21,7 @@ import java.util.Locale;
  */
 final class UpdateLog {
 
-    static final int MAX_LINES = 10;
+    static final int MAX_LINES = 40;
     private static final String PREFS = "update_log";
     private static final String KEY = "lines";
     private static final String KEY_VERSION = "version";

app/src/main/res/layout-w1000dp/pane_settings.xml

@@ -26,6 +26,12 @@
                     </LinearLayout>
                 </LinearLayout>
                 <TextView android:id="@+id/accent_note" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="4dp" android:textAppearance="@style/Text.EV.Secondary" android:visibility="gone" />
+                <!-- Only the styles that show what plays (Tiles, Halloween). -->
+                <com.google.android.material.switchmaterial.SwitchMaterial android:id="@+id/now_playing_switch" android:layout_width="match_parent" android:layout_height="wrap_content" android:minHeight="72dp" android:text="@string/label_now_playing" android:textAppearance="@style/Text.EV.Body" android:paddingTop="8dp" android:paddingBottom="8dp" app:useMaterialThemeColors="true" app:thumbTint="@color/switch_thumb" app:trackTint="@color/switch_track" android:textColor="@color/ev_text_primary" android:visibility="gone" />
+                <TextView android:id="@+id/now_playing_hint" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/hint_now_playing" android:textAppearance="@style/Text.EV.Secondary" android:visibility="gone" />
+                <!-- Only Halloween listens to the music. -->
+                <com.google.android.material.switchmaterial.SwitchMaterial android:id="@+id/music_light_switch" android:layout_width="match_parent" android:layout_height="wrap_content" android:minHeight="72dp" android:text="@string/label_music_light" android:textAppearance="@style/Text.EV.Body" android:paddingTop="8dp" android:paddingBottom="8dp" app:useMaterialThemeColors="true" app:thumbTint="@color/switch_thumb" app:trackTint="@color/switch_track" android:textColor="@color/ev_text_primary" android:visibility="gone" />
+                <TextView android:id="@+id/music_light_hint" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/hint_music_light" android:textAppearance="@style/Text.EV.Secondary" android:visibility="gone" />
                 <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:baselineAligned="false">
                     <LinearLayout android:layout_width="0dp" android:layout_weight="1" android:layout_height="wrap_content" android:layout_marginEnd="12dp" android:orientation="vertical">
                         <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/label_tire_unit" android:textAppearance="@style/Text.EV.Body" android:layout_marginTop="8dp" />

app/src/main/res/layout-w1000dp/pane_vehicle.xml

@@ -31,7 +31,18 @@
             </LinearLayout>
         </LinearLayout>
         <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="16dp" android:orientation="horizontal" android:baselineAligned="false">
-            <Space android:layout_width="0dp" android:layout_height="1dp" android:layout_weight="1" android:layout_marginEnd="10dp" />
+            <!-- What plays (NowPlaying), in the slot under the battery; invisible when nothing does. -->
+            <LinearLayout android:id="@+id/now_playing_tile" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" android:layout_marginEnd="10dp" android:orientation="vertical" android:minHeight="112dp" android:padding="16dp" android:background="@drawable/bg_glass" android:visibility="invisible">
+                <TextView android:id="@+id/now_playing_source" android:layout_width="match_parent" android:layout_height="wrap_content" android:textAppearance="@style/Text.EV.Secondary" android:maxLines="1" android:ellipsize="end" />
+                <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="4dp" android:orientation="horizontal" android:gravity="center_vertical" android:baselineAligned="false">
+                    <ImageView android:id="@+id/now_playing_cover" android:layout_width="44dp" android:layout_height="44dp" android:layout_marginEnd="10dp" android:scaleType="centerCrop" android:importantForAccessibility="no" android:visibility="gone" />
+                    <LinearLayout android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" android:orientation="vertical">
+                        <TextView android:id="@+id/now_playing_title" android:layout_width="match_parent" android:layout_height="wrap_content" android:textAppearance="@style/Text.EV.Body" android:textSize="17sp" android:maxLines="1" android:ellipsize="end" />
+                        <TextView android:id="@+id/now_playing_artist" android:layout_width="match_parent" android:layout_height="wrap_content" android:textAppearance="@style/Text.EV.Secondary" android:textColor="?attr/evAccentLight" android:textSize="16sp" android:maxLines="1" android:ellipsize="end" />
+                    </LinearLayout>
+                </LinearLayout>
+                <ProgressBar android:id="@+id/now_playing_progress" style="?android:attr/progressBarStyleHorizontal" android:layout_width="match_parent" android:layout_height="4dp" android:layout_marginTop="6dp" android:max="1000" android:progressTint="?attr/evAccent" android:progressBackgroundTint="?attr/evAccentTrack" android:visibility="invisible" />
+            </LinearLayout>
             <LinearLayout android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" android:layout_marginEnd="10dp" android:orientation="vertical" android:minHeight="112dp" android:padding="16dp" android:background="@drawable/bg_glass">
                 <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/vehicle_row_energy_trip" android:textAppearance="@style/Text.EV.Secondary" />
                 <TextView android:id="@+id/vehicle_energy_trip" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/no_value" android:layout_marginTop="6dp" android:textAppearance="@style/Text.EV.Metric.Compact" android:gravity="end" android:fontFeatureSettings="tnum" android:maxLines="1" android:autoSizeTextType="uniform" android:autoSizeMinTextSize="18sp" android:autoSizeMaxTextSize="28sp" android:autoSizeStepGranularity="1sp" />

app/src/main/res/layout/pane_log.xml

@@ -15,6 +15,13 @@
             <com.google.android.material.button.MaterialButton android:id="@+id/media_probe_button" android:layout_width="match_parent" android:layout_height="72dp" android:layout_marginTop="16dp" android:text="@string/btn_media_probe" style="@style/Widget.EV.Button.Outlined" />
             <TextView android:id="@+id/media_probe_text" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="16dp" android:textAppearance="@style/Text.EV.Body" android:fontFamily="monospace" android:textSize="17sp" android:lineSpacingExtra="8dp" android:textIsSelectable="true" android:visibility="gone" />
         </LinearLayout>
+        <!-- The sound check (SoundProbe): whether the audio analyser can hear what plays. -->
+        <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" android:paddingStart="24dp" android:paddingEnd="24dp" android:paddingTop="16dp" android:paddingBottom="16dp" android:layout_marginBottom="16dp" android:background="@drawable/bg_glass">
+            <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/label_sound_probe" android:textAppearance="@style/Text.EV.Eyebrow" />
+            <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="12dp" android:text="@string/sound_probe_hint" android:textAppearance="@style/Text.EV.Secondary" />
+            <com.google.android.material.button.MaterialButton android:id="@+id/sound_probe_button" android:layout_width="match_parent" android:layout_height="72dp" android:layout_marginTop="16dp" android:text="@string/btn_sound_probe" style="@style/Widget.EV.Button.Outlined" />
+            <TextView android:id="@+id/sound_probe_text" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="16dp" android:textAppearance="@style/Text.EV.Body" android:fontFamily="monospace" android:textSize="17sp" android:lineSpacingExtra="8dp" android:textIsSelectable="true" android:visibility="gone" />
+        </LinearLayout>
         <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" android:paddingStart="24dp" android:paddingEnd="24dp" android:paddingTop="16dp" android:paddingBottom="16dp" android:background="@drawable/bg_glass">
             <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/label_call_log" android:textAppearance="@style/Text.EV.Eyebrow" />
             <com.google.android.material.button.MaterialButton android:id="@+id/flush_now_button" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="16dp" android:text="@string/btn_flush_now" app:icon="@drawable/ic_refresh" app:iconGravity="textStart" style="@style/Widget.EV.Button.Outlined" />

app/src/main/res/layout/pane_settings.xml

@@ -17,6 +17,12 @@
                 <com.google.android.material.textfield.MaterialAutoCompleteTextView android:id="@+id/accent_choices" android:layout_width="match_parent" android:layout_height="wrap_content" android:minHeight="72dp" android:inputType="none" android:textSize="20sp" app:simpleItemLayout="@layout/dropdown_item" />
             </com.google.android.material.textfield.TextInputLayout>
             <TextView android:id="@+id/accent_note" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="4dp" android:textAppearance="@style/Text.EV.Secondary" android:visibility="gone" />
+            <!-- Only the styles that show what plays (Tiles, Halloween). -->
+            <com.google.android.material.switchmaterial.SwitchMaterial android:id="@+id/now_playing_switch" android:layout_width="match_parent" android:layout_height="wrap_content" android:minHeight="72dp" android:text="@string/label_now_playing" android:textAppearance="@style/Text.EV.Body" android:paddingTop="8dp" android:paddingBottom="8dp" app:useMaterialThemeColors="true" app:thumbTint="@color/switch_thumb" app:trackTint="@color/switch_track" android:textColor="@color/ev_text_primary" android:visibility="gone" />
+            <TextView android:id="@+id/now_playing_hint" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/hint_now_playing" android:textAppearance="@style/Text.EV.Secondary" android:visibility="gone" />
+            <!-- Only Halloween listens to the music. -->
+            <com.google.android.material.switchmaterial.SwitchMaterial android:id="@+id/music_light_switch" android:layout_width="match_parent" android:layout_height="wrap_content" android:minHeight="72dp" android:text="@string/label_music_light" android:textAppearance="@style/Text.EV.Body" android:paddingTop="8dp" android:paddingBottom="8dp" app:useMaterialThemeColors="true" app:thumbTint="@color/switch_thumb" app:trackTint="@color/switch_track" android:textColor="@color/ev_text_primary" android:visibility="gone" />
+            <TextView android:id="@+id/music_light_hint" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/hint_music_light" android:textAppearance="@style/Text.EV.Secondary" android:visibility="gone" />
             <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/label_tire_unit" android:textAppearance="@style/Text.EV.Body" android:layout_marginTop="20dp" />
             <com.google.android.material.textfield.TextInputLayout style="@style/Widget.EV.Dropdown" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="12dp">
                 <com.google.android.material.textfield.MaterialAutoCompleteTextView android:id="@+id/tire_unit_choices" android:layout_width="match_parent" android:layout_height="wrap_content" android:minHeight="72dp" android:inputType="none" android:textSize="20sp" app:simpleItemLayout="@layout/dropdown_item" />

app/src/main/res/values/strings.xml

@@ -129,6 +129,15 @@
     <string name="overview_style_scifi">Sci-fi</string>
     <string name="overview_style_cartoon">Cartoon</string>
     <string name="overview_style_mg">MG</string>
+    <string name="label_now_playing">Show what\'s playing</string>
+    <string name="hint_now_playing">Title and artist from Bluetooth, CarPlay or the radio. Shown here only, never sent.</string>
+    <string name="now_playing_bluetooth">Bluetooth</string>
+    <string name="now_playing_carplay">CarPlay</string>
+    <string name="now_playing_radio">Radio</string>
+    <string name="now_playing_other">Media</string>
+    <string name="now_playing_paused">%1$s · paused</string>
+    <string name="label_music_light">Pumpkin light follows the music</string>
+    <string name="hint_music_light">Flares on the kick drum over Bluetooth or CarPlay, not the radio. Levels only, no sound kept.</string>
     <string name="accent_not_used">%1$s has its own colours, and the app takes them on. To change the accent colour, pick a style that uses it.</string>
     <string name="overview_fullscreen_enter">Overview full screen: hide the navigation</string>
     <string name="overview_fullscreen_exit">Show the navigation again</string>
@@ -141,6 +150,8 @@
     <string name="overview_style_quest">Quest</string>
     <string name="overview_style_visor">Visor</string>
     <string name="overview_style_empire">Empire</string>
+    <string name="overview_style_muertos">Día de Muertos</string>
+    <string name="overview_style_halloween">Halloween</string>
     <string name="overview_style_nixie">Nixie tubes</string>
     <string name="overview_style_chronograph">Chronograph</string>
     <string name="cockpit_battery">BATTERY</string>
@@ -231,6 +242,10 @@
     <string name="label_media_probe">Music sources</string>
     <string name="media_probe_hint">Finds where the head unit tells what is playing: the playback Android reports and the media sessions apps publish (CarPlay, Bluetooth, radio, USB), each with its song, and the head unit\'s media services by name. Play something first and check once for each source. Like a recording, the result goes to your server and to a USB stick. It only reads and connects to no other app: nothing is played, paused or skipped.</string>
     <string name="btn_media_probe">Check music sources</string>
+    <string name="label_sound_probe">Sound check</string>
+    <string name="sound_probe_hint">Finds out whether the app can hear the music, for a light that follows it. Park first, play something, then check once each for Bluetooth, CarPlay and radio. It listens for 10 seconds and keeps only the levels, never the sound, and uses no microphone. Like a recording, the result goes to your server and to a USB stick.</string>
+    <string name="btn_sound_probe">Check sound</string>
+    <string name="sound_probe_running">Listening… (10 seconds)</string>
     <string name="media_probe_running">Checking… (up to a minute)</string>
     <string name="media_probe_done">Check from %1$s, %2$s:</string>
     <string name="log_outbox_sent">Sent to the server.</string>

app/src/main/res/values/style_palettes.xml

@@ -104,4 +104,24 @@
         <item name="evAccentStroke">#80344A99</item>
         <item name="evAccentTrack">#2A3F82</item>
     </style>
+    <!-- Día de Muertos: the pink of the papel picado. -->
+    <style name="ThemeOverlay.EV.Style.Muertos" parent="">
+        <item name="evAccent">#FF2E93</item>
+        <item name="evOnAccent">#22041A</item>
+        <item name="evAccentLight">#FFA8D4</item>
+        <item name="evAccentDeep">#4A0E32</item>
+        <item name="evAccentSurface">#2C1242</item>
+        <item name="evAccentStroke">#80993366</item>
+        <item name="evAccentTrack">#7A2558</item>
+    </style>
+    <!-- Halloween: the pumpkin's orange. -->
+    <style name="ThemeOverlay.EV.Style.Halloween" parent="">
+        <item name="evAccent">#FF8C1A</item>
+        <item name="evOnAccent">#1F0E02</item>
+        <item name="evAccentLight">#FFC27A</item>
+        <item name="evAccentDeep">#3D2008</item>
+        <item name="evAccentSurface">#22102E</item>
+        <item name="evAccentStroke">#80804A1E</item>
+        <item name="evAccentTrack">#6A3F18</item>
+    </style>
 </resources>

app/src/test/java/com/evsuite/abrp/MusicPulseTest.java

@@ -0,0 +1,110 @@
+package com.evsuite.abrp;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+import org.junit.Test;
+
+public class MusicPulseTest {
+
+    private static final float STEP = 0.04f;
+
+    @Test
+    public void noReadingAndSilenceLightNothing() {
+        MusicPulse p = new MusicPulse();
+        assertEquals(0f, p.update(null, STEP), 0f);
+        assertEquals(0f, p.update(Float.NaN, STEP), 0f);
+        assertEquals(0f, p.update(0f, STEP), 0f);
+    }
+
+    @Test
+    public void aBeatLightsAndFadesSlowerThanItRises() {
+        MusicPulse p = new MusicPulse();
+        for (int i = 0; i < 50; i++) p.update(0.05f, STEP);
+        float beat = p.update(0.5f, STEP);
+        assertTrue("a beat lights it, got " + beat, beat > 0.8f);
+        float after = p.update(0.05f, STEP);
+        assertTrue("it fades, got " + after, after < beat);
+        assertTrue("slowly, got " + after, after > beat * 0.7f);
+    }
+
+    @Test
+    public void aSteadyHumSettlesAtNothing() {
+        MusicPulse p = new MusicPulse();
+        float last = 1f;
+        for (int i = 0; i < 400; i++) last = p.update(0.3f, STEP);
+        assertEquals(0f, last, 0f);
+    }
+
+    @Test
+    public void aHeldBassNoteLightsOnlyItsStart() {
+        MusicPulse p = new MusicPulse();
+        for (int i = 0; i < 50; i++) p.update(0.05f, STEP);
+        assertTrue(p.update(0.4f, STEP) > 0.8f);
+        float last = 1f;
+        for (int i = 0; i < 25; i++) last = p.update(0.4f, STEP);
+        assertEquals(0f, last, 0f);
+    }
+
+    @Test
+    public void aWobblingBassLineStaysDark() {
+        MusicPulse p = new MusicPulse();
+        for (int i = 0; i < 50; i++) p.update(0.3f, STEP);
+        float top = 0f;
+        for (int i = 0; i < 200; i++) top = Math.max(top, p.update(i % 3 == 0 ? 0.33f : 0.3f, STEP));
+        assertEquals(0f, top, 0f);
+    }
+
+    @Test
+    public void aSwellingNoteStaysDark() {
+        MusicPulse p = new MusicPulse();
+        for (int i = 0; i < 50; i++) p.update(0.1f, STEP);
+        float top = 0f;
+        for (int i = 0; i < 100; i++) top = Math.max(top, p.update(0.1f + i * 0.004f, STEP));
+        assertEquals(0f, top, 0f);
+    }
+
+    @Test
+    public void aKickOverABassLineLights() {
+        MusicPulse p = new MusicPulse();
+        float top = 0f;
+        for (int i = 0; i < 300; i++) {
+            float v = p.update(i % 12 == 0 ? 0.6f : (i % 3 == 0 ? 0.33f : 0.3f), STEP);
+            if (i > 100) top = Math.max(top, v);
+        }
+        assertTrue("a kick lights it, got " + top, top > 0.8f);
+    }
+
+    @Test
+    public void quietAndLoudSongsPulseAlike() {
+        assertEquals(beatOf(0.5f), beatOf(0.05f), 0.02f);
+    }
+
+    private static float beatOf(float scale) {
+        MusicPulse p = new MusicPulse();
+        float top = 0f;
+        for (int i = 0; i < 500; i++) {
+            top = Math.max(top * 0.99f, p.update(i % 12 == 0 ? scale : scale * 0.2f, STEP));
+        }
+        return top;
+    }
+
+    @Test
+    public void whenTheMusicStopsItGoesOut() {
+        MusicPulse p = new MusicPulse();
+        for (int i = 0; i < 100; i++) p.update(i % 12 == 0 ? 0.5f : 0.1f, STEP);
+        float last = 1f;
+        for (int i = 0; i < 100; i++) last = p.update(null, STEP);
+        assertEquals(0f, last, 0f);
+    }
+
+    @Test
+    public void itStaysBetweenZeroAndOne() {
+        MusicPulse p = new MusicPulse();
+        for (int i = 0; i < 2000; i++) {
+            Float bass = i % 11 == 0 ? null : Float.valueOf(i % 7 == 0 ? 1f : 0.1f);
+            float v = p.update(bass, i % 5 == 0 ? 2f : STEP);
+            assertTrue(v >= 0f && v <= 1f);
+        }
+    }
+}

app/src/test/java/com/evsuite/abrp/NowPlayingTest.java

@@ -0,0 +1,138 @@
+package com.evsuite.abrp;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertTrue;
+
+import java.util.Arrays;
+import java.util.Collections;
+
+import org.junit.Test;
+
+public class NowPlayingTest {
+
+    private static NowPlaying.Session session(String pkg, int state, String title, String artist, long updatedAt) {
+        NowPlaying.Session s = new NowPlaying.Session();
+        s.packageName = pkg;
+        s.state = state;
+        s.title = title;
+        s.artist = artist;
+        s.positionUpdatedAt = updatedAt;
+        return s;
+    }
+
+    @Test
+    public void nothingToShow() {
+        assertNull(NowPlaying.pick(null));
+        assertNull(NowPlaying.pick(Collections.emptyList()));
+        // Bluetooth's empty session after the phone stopped, and one that only connects.
+        assertNull(NowPlaying.pick(Arrays.asList(
+                session("com.android.bluetooth", 1, "", "", 5),
+                session("com.android.car.radio", 8, "Radio", null, 6),
+                session("com.android.bluetooth", NowPlaying.STATE_PLAYING, " ", null, 7))));
+    }
+
+    @Test
+    public void whatPlaysWinsOverWhatIsPaused() {
+        // As on the car on 2026-10-28: CarPlay paused, Bluetooth playing.
+        NowPlaying.Track t = NowPlaying.pick(Arrays.asList(
+                session("com.allgo.remoteui.mediabrowserservice", NowPlaying.STATE_PAUSED, "A Mix", "Bass Bangers", 900),
+                session("com.android.bluetooth", NowPlaying.STATE_PLAYING, "Paramount", "Mark Petrie & Andrew Prahlow", 100)));
+        assertEquals(NowPlaying.Source.BLUETOOTH, t.source);
+        assertEquals("Paramount", t.title);
+        assertEquals("Mark Petrie & Andrew Prahlow", t.subtitle);
+        assertTrue(t.playing);
+    }
+
+    @Test
+    public void ofTwoPlayingTheNewerWins() {
+        NowPlaying.Track t = NowPlaying.pick(Arrays.asList(
+                session("com.android.bluetooth", NowPlaying.STATE_PLAYING, "Old", null, 100),
+                session("com.allgo.remoteui.mediabrowserservice", NowPlaying.STATE_BUFFERING, "New", null, 200)));
+        assertEquals(NowPlaying.Source.CARPLAY, t.source);
+        assertEquals("New", t.title);
+    }
+
+    @Test
+    public void withNothingPlayingThePausedOneShows() {
+        NowPlaying.Track t = NowPlaying.pick(Arrays.asList(
+                session("com.android.bluetooth", NowPlaying.STATE_PAUSED, "Earlier", null, 100),
+                session("com.allgo.remoteui.mediabrowserservice", NowPlaying.STATE_PAUSED, "Later", null, 300)));
+        assertEquals("Later", t.title);
+        assertFalse(t.playing);
+    }
+
+    @Test
+    public void theRadioShowsItsTextWithTheStationBelow() {
+        NowPlaying.Track t = NowPlaying.pick(Collections.singletonList(
+                session("com.saicmotor.radio", NowPlaying.STATE_PLAYING, "Brillux Radio", "BLIND MELON - NO RAIN", 1)));
+        assertEquals(NowPlaying.Source.RADIO, t.source);
+        assertEquals("BLIND MELON - NO RAIN", t.title);
+        assertEquals("Brillux Radio", t.subtitle);
+        NowPlaying.Track station = NowPlaying.pick(Collections.singletonList(
+                session("com.saicmotor.radio", NowPlaying.STATE_PLAYING, "Brillux Radio", "", 1)));
+        assertEquals("Brillux Radio", station.title);
+        assertNull(station.subtitle);
+        assertEquals(-1f, station.progressAt(5), 0f);
+    }
+
+    @Test
+    public void textIsCleaned() {
+        assertEquals("A Letter to the Past (A Seasonal Feels Mix) Ft. Porter Robinson & Friends By SAINT",
+                NowPlaying.clean("A Letter to the Past (A Seasonal Feels Mix) Ft. Porter Robinson & Friends By SAINT [X4nayMeMBuQ]"));
+        assertEquals("Live [Remastered 2011]", NowPlaying.clean("Live [Remastered 2011]"));
+        assertEquals("two lines", NowPlaying.clean("  two\n  lines "));
+        assertNull(NowPlaying.clean("   "));
+        assertNull(NowPlaying.clean(null));
+        StringBuilder longText = new StringBuilder();
+        for (int i = 0; i < 300; i++) longText.append('x');
+        assertEquals(200, NowPlaying.clean(longText.toString()).length());
+    }
+
+    @Test
+    public void onlyAnArtistStillShows() {
+        NowPlaying.Track t = NowPlaying.pick(Collections.singletonList(
+                session("com.example.player", NowPlaying.STATE_PLAYING, null, "Someone", 1)));
+        assertEquals(NowPlaying.Source.OTHER, t.source);
+        assertEquals("Someone", t.title);
+        assertNull(t.subtitle);
+    }
+
+    @Test
+    public void thePositionRunsOnWhilePlayingAndStopsAtTheEnd() {
+        NowPlaying.Session s = session("com.android.bluetooth", NowPlaying.STATE_PLAYING, "Paramount", "M", 10_000);
+        s.positionMs = 3_000;
+        s.durationMs = 215_000;
+        NowPlaying.Track t = NowPlaying.pick(Collections.singletonList(s));
+        assertEquals(3_000, t.positionAt(10_000));
+        assertEquals(8_000, t.positionAt(15_000));
+        assertEquals(215_000, t.positionAt(10_000_000));
+        assertEquals(1f, t.progressAt(10_000_000), 0f);
+        assertEquals(8_000 / 215_000f, t.progressAt(15_000), 1e-6f);
+    }
+
+    @Test
+    public void aPausedPositionStaysPut() {
+        NowPlaying.Session s = session("com.android.bluetooth", NowPlaying.STATE_PAUSED, "Paramount", null, 10_000);
+        s.positionMs = 3_000;
+        s.durationMs = 215_000;
+        assertEquals(3_000, NowPlaying.pick(Collections.singletonList(s)).positionAt(99_000));
+    }
+
+    @Test
+    public void noPositionNoBar() {
+        NowPlaying.Session s = session("com.android.bluetooth", NowPlaying.STATE_PLAYING, "Paramount", null, 10_000);
+        s.durationMs = 215_000;
+        assertEquals(-1f, NowPlaying.pick(Collections.singletonList(s)).progressAt(20_000), 0f);
+    }
+
+    @Test
+    public void sourcesAreKnownByTheirApps() {
+        assertEquals(NowPlaying.Source.BLUETOOTH, NowPlaying.source("com.android.bluetooth"));
+        assertEquals(NowPlaying.Source.CARPLAY, NowPlaying.source("com.allgo.remoteui.mediabrowserservice"));
+        assertEquals(NowPlaying.Source.RADIO, NowPlaying.source("com.saicmotor.radio"));
+        assertEquals(NowPlaying.Source.OTHER, NowPlaying.source("com.android.music"));
+        assertEquals(NowPlaying.Source.OTHER, NowPlaying.source(null));
+    }
+}

app/src/test/java/com/evsuite/abrp/SoundLevelsTest.java

@@ -0,0 +1,78 @@
+package com.evsuite.abrp;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNull;
+
+import org.junit.Test;
+
+public class SoundLevelsTest {
+
+    private static byte[] wave(int... unsigned) {
+        byte[] out = new byte[unsigned.length];
+        for (int i = 0; i < out.length; i++) out[i] = (byte) unsigned[i];
+        return out;
+    }
+
+    @Test
+    public void silenceIsTheMiddleOfTheWaveform() {
+        assertEquals(0f, SoundLevels.peak(wave(128, 128, 128)), 0f);
+        assertEquals(0.5f, SoundLevels.peak(wave(128, 192, 128)), 0f);
+        assertEquals(0.5f, SoundLevels.peak(wave(128, 64, 128)), 0f);
+        assertEquals(1f, SoundLevels.peak(wave(0, 255)), 0f);
+    }
+
+    @Test
+    public void aFailedReadIsNotSilence() {
+        assertNull(SoundLevels.peak(null));
+        assertNull(SoundLevels.peak(new byte[0]));
+        assertNull(SoundLevels.band(null, 48000, 0f, 250f));
+        assertNull(SoundLevels.band(new byte[8], 0, 0f, 250f));
+    }
+
+    @Test
+    public void aBandAveragesItsOwnBins() {
+        // Eight values: DC and Nyquist, then bins 1 to 3, here 1000, 2000 and 3000 Hz.
+        byte[] fft = { 99, 99, 64, 0, 0, 32, 3, 4 };
+        assertEquals(0.5f, SoundLevels.band(fft, 8000, 500f, 1500f), 1e-6f);
+        assertEquals(0.25f, SoundLevels.band(fft, 8000, 2000f, 2500f), 1e-6f);
+        assertEquals(5f / 128f, SoundLevels.band(fft, 8000, 3000f, 4000f), 1e-6f);
+        assertEquals((0.5f + 0.25f) / 2f, SoundLevels.band(fft, 8000, 500f, 2500f), 1e-6f);
+        assertNull(SoundLevels.band(fft, 8000, 5000f, 6000f));
+    }
+
+    @Test
+    public void theVerdictTellsDeafFromNothingPlaying() {
+        SoundLevels.Summary none = new SoundLevels.Summary();
+        none.add(null, null, null, null, null);
+        assertEquals(SoundLevels.Verdict.NO_READING, none.verdict(true));
+
+        SoundLevels.Summary silent = new SoundLevels.Summary();
+        silent.add(0f, 0f, 0f, 0f, -9600);
+        silent.add(0.01f, 0f, 0f, 0f, -9600);
+        assertEquals(SoundLevels.Verdict.DEAF, silent.verdict(true));
+        assertEquals(SoundLevels.Verdict.NOTHING_PLAYING, silent.verdict(false));
+    }
+
+    @Test
+    public void onlyAMovingLevelIsHeard() {
+        SoundLevels.Summary steady = new SoundLevels.Summary();
+        steady.add(0.4f, 0.1f, 0.1f, 0.1f, -2000);
+        steady.add(0.41f, 0.1f, 0.1f, 0.1f, -2000);
+        assertEquals(SoundLevels.Verdict.STEADY, steady.verdict(true));
+
+        SoundLevels.Summary music = new SoundLevels.Summary();
+        music.add(0.1f, 0.2f, 0.1f, 0f, -3000);
+        music.add(0.6f, 0.4f, 0.3f, 0.1f, -1500);
+        assertEquals(SoundLevels.Verdict.HEARS, music.verdict(true));
+    }
+
+    @Test
+    public void theLineAveragesAndMarksWhatFailed() {
+        SoundLevels.Summary s = new SoundLevels.Summary();
+        s.add(0.1f, 0.2f, 0.1f, 0f, -3000);
+        s.add(null, null, null, null, null);
+        s.add(0.6f, 0.4f, 0.3f, 0.1f, -1500);
+        assertEquals("peak 0.10–0.60, bass 0.300, mid 0.200, treble 0.050, rms -1500 mB (2/3)", s.line());
+        assertEquals("peak —, bass —, mid —, treble —, rms — (0/0)", new SoundLevels.Summary().line());
+    }
+}

app/src/test/java/com/evsuite/abrp/TallyTest.java

@@ -0,0 +1,41 @@
+package com.evsuite.abrp;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+
+public class TallyTest {
+
+    @Test
+    public void anUnreadValueLightsNothing() {
+        assertEquals(0, Tally.lit(null, 10f, 10));
+        assertEquals(0, Tally.lit(Float.NaN, 10f, 10));
+        assertEquals(0, Tally.ofPower(null, 150f, 50f, 24));
+        assertEquals(0, Tally.ofPower(Float.NaN, 150f, 50f, 24));
+    }
+
+    @Test
+    public void oneThingPerStepUpToTheRow() {
+        assertEquals(8, Tally.lit(76f, 10f, 10));
+        assertEquals(10, Tally.lit(100f, 10f, 10));
+        assertEquals(8, Tally.lit(900f, 50f, 8));
+        assertEquals(6, Tally.lit(312f, 50f, 8));
+        assertEquals(0, Tally.lit(0f, 10f, 10));
+        assertEquals(0, Tally.lit(-5f, 10f, 10));
+    }
+
+    @Test
+    public void powerFillsTheGaugeEachWay() {
+        assertEquals(0, Tally.ofPower(0f, 150f, 50f, 24));
+        assertEquals(24, Tally.ofPower(150f, 150f, 50f, 24));
+        assertEquals(24, Tally.ofPower(400f, 150f, 50f, 24));
+        assertEquals(12, Tally.ofPower(-25f, 150f, 50f, 24));
+        assertEquals(24, Tally.ofPower(-50f, 150f, 50f, 24));
+    }
+
+    @Test
+    public void realPowerAlwaysShows() {
+        assertEquals(1, Tally.ofPower(0.5f, 150f, 50f, 24));
+        assertEquals(1, Tally.ofPower(-0.2f, 150f, 50f, 24));
+    }
+}

app/src/test/java/com/evsuite/abrp/UpdateDiagnosisTest.java

@@ -0,0 +1,67 @@
+package com.evsuite.abrp;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import org.junit.Test;
+
+import java.io.IOException;
+import java.net.ConnectException;
+import java.net.SocketTimeoutException;
+import java.net.UnknownHostException;
+import java.util.Arrays;
+import java.util.Collections;
+
+import javax.net.ssl.SSLHandshakeException;
+
+public class UpdateDiagnosisTest {
+
+    @Test
+    public void errorsAreToldApart() {
+        assertTrue(UpdateDiagnosis.failure(new UnknownHostException()).contains("no data connection"));
+        assertTrue(UpdateDiagnosis.failure(new SocketTimeoutException()).contains("in time"));
+        assertTrue(UpdateDiagnosis.failure(new ConnectException()).contains("no connection"));
+        assertTrue(UpdateDiagnosis.failure(new SSLHandshakeException("x")).contains("in between"));
+        assertTrue(UpdateDiagnosis.failure(new IOException("Release API returned 401")).contains("token"));
+        assertTrue(UpdateDiagnosis.failure(new IOException("Invalid release response")).contains("not a list"));
+        assertEquals("unknown failure", UpdateDiagnosis.failure(null));
+    }
+
+    @Test
+    public void anErrorsOwnTextNeverReachesTheLog() {
+        String secret = "https://car.example.com/v1/app/releases?token=abc";
+        for (Throwable t : Arrays.asList(new UnknownHostException(secret), new SocketTimeoutException(secret),
+                new ConnectException(secret), new SSLHandshakeException(secret), new IOException(secret),
+                new RuntimeException(secret))) {
+            String line = UpdateDiagnosis.failure(t);
+            assertFalse(line, line.contains("example"));
+            assertFalse(line, line.contains("abc"));
+        }
+    }
+
+    @Test
+    public void statusesSayWhoIsAtFault() {
+        assertTrue(UpdateDiagnosis.status(302).contains("SIM without data"));
+        assertTrue(UpdateDiagnosis.status(401).contains("token"));
+        assertTrue(UpdateDiagnosis.status(403).contains("token"));
+        assertTrue(UpdateDiagnosis.status(404).contains("does not know"));
+        assertTrue(UpdateDiagnosis.status(502).contains("forge"));
+        assertTrue(UpdateDiagnosis.status(418).contains("HTTP 418"));
+    }
+
+    @Test
+    public void onlyA204IsTheInternetWorking() {
+        assertTrue(UpdateDiagnosis.internet(204).startsWith("the internet works"));
+        assertTrue(UpdateDiagnosis.internet(200).contains("in between"));
+        assertTrue(UpdateDiagnosis.internet(302).contains("SIM without data"));
+    }
+
+    @Test
+    public void aNetworkInOneLine() {
+        assertEquals("cellular, in use, offers internet, not confirmed by Android, roaming",
+                UpdateDiagnosis.network(Collections.singletonList("cellular"), true, false, true, true));
+        assertEquals("unknown type, no internet, confirmed by Android",
+                UpdateDiagnosis.network(Collections.emptyList(), false, true, false, false));
+    }
+}

app/src/unstable/AndroidManifest.xml

@@ -18,6 +18,13 @@
         android:name="android.permission.MEDIA_CONTENT_CONTROL"
         tools:ignore="ProtectedPermissions" />
 
+    <!-- An update check writes down which networks Android sees (UpdateNetworkCheck). -->
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+    <!-- The Logs tab's sound check (SoundProbe): Android's audio analyser asks for both. The
+         system user holds them without a prompt; the analyser reports levels only, no sound. -->
+    <uses-permission android:name="android.permission.RECORD_AUDIO" />
+    <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
+
     <application>
         <provider
             android:name="androidx.core.content.FileProvider"

app/src/unstable/java/com/evsuite/abrp/OtaUpdater.java

@@ -55,6 +55,9 @@ final class OtaUpdater {
     private static final String TAG = "OtaUpdater";
     private static final String CACHE_PREFIX = "NilsMG4-ota-";
 
+    /** Why the last download failed, for the update log. */
+    static volatile String downloadProblem = "unknown";
+
     /** The release list on the car server, for the server configured in the app. */
     static String releasesUrl(ServerConfig config) {
         return config.url + "/v1/app/releases";
@@ -366,6 +369,7 @@ final class OtaUpdater {
             connection.setRequestProperty("User-Agent", "NilsMG4-Android");
             if (connection.getResponseCode() != HttpURLConnection.HTTP_OK) {
                 Log.w(TAG, "Update download returned " + connection.getResponseCode());
+                downloadProblem = UpdateDiagnosis.status(connection.getResponseCode());
                 return null;
             }
             long total = connection.getContentLengthLong();
@@ -390,10 +394,14 @@ final class OtaUpdater {
                 out.getFD().sync();
             }
             ok = hex(digest.digest()).equalsIgnoreCase(expectedSha256);
-            if (!ok) Log.w(TAG, "Update APK does not match its SHA-256");
+            if (!ok) {
+                Log.w(TAG, "Update APK does not match its SHA-256");
+                downloadProblem = "it does not match its SHA-256";
+            }
             return ok ? target : null;
         } catch (Exception e) {
             Log.w(TAG, "Update download failed: " + e.getClass().getSimpleName());
+            downloadProblem = UpdateDiagnosis.failure(e);
             return null;
         } finally {
             if (connection != null) connection.disconnect();

app/src/unstable/java/com/evsuite/abrp/UpdateHook.java

@@ -5,6 +5,11 @@ import android.util.Log;
 
 import java.io.File;
 import java.io.IOException;
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.List;
+import java.util.Locale;
 import java.util.concurrent.atomic.AtomicBoolean;
 
 /**
@@ -58,7 +63,8 @@ final class UpdateHook {
                                 "Update available: " + update.versionName,
                                 android.widget.Toast.LENGTH_LONG).show());
             } catch (Throwable t) {
-                Log.w(TAG, "Startup update check failed", t);
+                Log.w(TAG, "Startup update check failed: " + t.getClass().getSimpleName());
+                UpdateLog.record(app, "Check at start: " + UpdateDiagnosis.failure(t));
             }
         }, "ota-startup-check").start();
     }
@@ -78,24 +84,46 @@ final class UpdateHook {
             return;
         }
         new Thread(() -> {
+            long startedMs = System.currentTimeMillis();
+            List<String> steps = new ArrayList<>();
+            step(app, steps, "Check started, app " + BuildConfig.VERSION_NAME);
             String message;
             try {
+                for (String network : UpdateNetworkCheck.networks(app)) step(app, steps, network);
+                ServerConfig config = ServerConfig.get(app);
+                String host = config.isConfigured() ? OtaUpdater.allowedHost(config) : null;
+                if (host != null) step(app, steps, UpdateNetworkCheck.lookup(host));
                 message = runCheck(app, listener, main);
             } catch (Throwable t) {
-                Log.w(TAG, "Update check threw", t);
+                Log.w(TAG, "Update check threw: " + t.getClass().getSimpleName());
-                // The class only: a network error's text can carry the server's address.
+                message = "Update check failed: " + UpdateDiagnosis.failure(t);
-                message = "Update check failed (" + t.getClass().getSimpleName() + ")";
+                // Is it the server or the connection? The answer to "is my SIM out of data".
+                step(app, steps, UpdateNetworkCheck.internet());
             } finally {
                 checking.set(false);
             }
-            UpdateLog.record(app, "Check: " + message);
+            step(app, steps, "Check: " + message);
+            String waiting = LogOutbox.status(app);
+            if (waiting != null) step(app, steps, "Reports: " + waiting);
             if (listener != null) {
                 final String result = message;
                 main.post(() -> listener.onResult(result));
             }
+            // After the answer: without a connection this waits for the send to fail.
+            String name = "update-check-" + new SimpleDateFormat("yyyyMMdd-HHmmss", Locale.US)
+                    .format(new Date(startedMs)) + ".txt";
+            // Only the newest waits: repeated checks offline must not push out a recording.
+            LogOutbox.dropWaiting(app, "update-check-");
+            SignalRecorder.saveCopies(app, "update_check.txt", name, steps);
         }, "ota-check").start();
     }
 
+    /** One step of a check: on the Logs tab now, and in the report saved when it ends. */
+    private static void step(Context app, List<String> steps, String what) {
+        UpdateLog.record(app, what);
+        steps.add(what);
+    }
+
     /**
      * Installs the newest car build from the top folder of a USB stick (UsbUpdate), with the
      * same checks as the over-the-air update except the server. Background thread; [listener]
@@ -195,14 +223,14 @@ final class UpdateHook {
         try {
             expectedHash = OtaUpdater.fetchExpectedSha256(update, config);
         } catch (IOException e) {
-            Log.w(TAG, "OTA hash unavailable: " + e.getMessage());
+            Log.w(TAG, "OTA hash unavailable: " + e.getClass().getSimpleName());
-            return "Update refused: no SHA-256 verification";
+            return "Update refused, no SHA-256 verification: " + UpdateDiagnosis.failure(e);
         }
         File apk = OtaUpdater.download(update, expectedHash, config, percent -> {
             if (listener != null) main.post(() -> listener.onProgress(percent));
         });
         if (apk == null) return "Download or SHA-256 verification failed ("
-                + update.versionName + ")";
+                + update.versionName + "): " + OtaUpdater.downloadProblem;
 
         switch (OtaUpdater.install(app, apk)) {
             case SESSION_STARTED:

app/src/unstable/java/com/evsuite/abrp/UpdateNetworkCheck.java

@@ -0,0 +1,92 @@
+package com.evsuite.abrp;
+
+import android.content.Context;
+import android.net.ConnectivityManager;
+import android.net.Network;
+import android.net.NetworkCapabilities;
+import android.net.NetworkInfo;
+
+import java.io.IOException;
+import java.net.HttpURLConnection;
+import java.net.InetAddress;
+import java.net.URL;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * What an update check writes down about the connection before and after it fails: the networks
+ * Android sees, whether the server's name can be looked up, and whether the internet answers at
+ * all, which tells a SIM without data from a server that is down. Blocking: background thread.
+ * Never logs the server's address or anything about the car. — UNSTABLE BUILDS ONLY.
+ */
+final class UpdateNetworkCheck {
+
+    /** Android's own connectivity test, as Android itself uses it; no data about the car is sent. */
+    private static final String INTERNET_TEST = "https://www.gstatic.com/generate_204";
+    private static final int TIMEOUT_MS = 10_000;
+
+    private UpdateNetworkCheck() {}
+
+    /** One line per network, or one saying there is none. */
+    static List<String> networks(Context app) {
+        List<String> out = new ArrayList<>();
+        try {
+            ConnectivityManager cm = (ConnectivityManager) app.getSystemService(Context.CONNECTIVITY_SERVICE);
+            if (cm == null) {
+                out.add("Network: no connectivity service");
+                return out;
+            }
+            Network active = cm.getActiveNetwork();
+            if (active == null) out.add("Network: none in use");
+            for (Network network : cm.getAllNetworks()) {
+                NetworkCapabilities caps = cm.getNetworkCapabilities(network);
+                if (caps == null) continue;
+                NetworkInfo info = cm.getNetworkInfo(network);
+                out.add("Network: " + UpdateDiagnosis.network(transports(caps),
+                        caps.hasCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET),
+                        caps.hasCapability(NetworkCapabilities.NET_CAPABILITY_VALIDATED),
+                        network.equals(active), info != null && info.isRoaming()));
+            }
+        } catch (RuntimeException e) {
+            out.add("Network: unreadable (" + e.getClass().getSimpleName() + ")");
+        }
+        return out;
+    }
+
+    private static List<String> transports(NetworkCapabilities caps) {
+        List<String> out = new ArrayList<>();
+        if (caps.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR)) out.add("cellular");
+        if (caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)) out.add("Wi-Fi");
+        if (caps.hasTransport(NetworkCapabilities.TRANSPORT_ETHERNET)) out.add("ethernet");
+        if (caps.hasTransport(NetworkCapabilities.TRANSPORT_BLUETOOTH)) out.add("Bluetooth");
+        if (caps.hasTransport(NetworkCapabilities.TRANSPORT_VPN)) out.add("VPN");
+        return out;
+    }
+
+    /** Whether the host's name resolves, without saying the name. */
+    static String lookup(String host) {
+        long started = System.currentTimeMillis();
+        try {
+            InetAddress.getByName(host);
+            return "Server's name: found in " + (System.currentTimeMillis() - started) + " ms";
+        } catch (IOException | RuntimeException e) {
+            return "Server's name: " + UpdateDiagnosis.failure(e);
+        }
+    }
+
+    /** Whether the world outside the car server answers. */
+    static String internet() {
+        HttpURLConnection conn = null;
+        try {
+            conn = (HttpURLConnection) new URL(INTERNET_TEST).openConnection();
+            conn.setInstanceFollowRedirects(false);
+            conn.setConnectTimeout(TIMEOUT_MS);
+            conn.setReadTimeout(TIMEOUT_MS);
+            return "Internet test: " + UpdateDiagnosis.internet(conn.getResponseCode());
+        } catch (IOException | RuntimeException e) {
+            return "Internet test: " + UpdateDiagnosis.failure(e);
+        } finally {
+            if (conn != null) conn.disconnect();
+        }
+    }
+}