Reported: on the Android Auto playback screen the play/pause button stays
on PLAY while audio is audibly playing, and "it used to work, in the
latest versions it doesn't".
Previous rounds looked for a regression in this repo's audio commits and
found none: every playbackState.add site publishes playing:true with a
ready processingState, and AudioService.getPlaybackState maps that to
STATE_PLAYING. That search was aimed at the wrong thing.
The Android for Cars guide ("Enable playback control") is explicit:
"Android Auto and AAOS display playback controls based on the actions
that are enabled in the PlaybackStateCompat object. By default, your app
must support the following actions: ACTION_PLAY, ACTION_PAUSE,
ACTION_STOP, ACTION_PLAY_FROM_MEDIA_ID, ACTION_PLAY_FROM_SEARCH."
systemActions has carried only `seek` + `stop` since e9d1f67, the first
commit of the project -- git log -S confirms it was never once edited. So
the required actions have never been advertised, and no audio commit can
explain a change in behaviour. Android Auto ships as its own app and
updates itself, which is how a working screen breaks with a clean repo
history. That fits the report better than any commit here does.
The phone notification was never affected: it builds its play/pause
button from `controls`, not from these bits, which is exactly why the
symptom is car-only.
Skip actions stay conditional on an active queue on purpose -- the same
guide notes Auto reserves the prev/next slots for them and gives the
space to custom actions when the app does not support them, and that is
the space the equalizer toggle needs.
ACTION_PLAY_FROM_SEARCH is now implemented rather than merely claimed:
advertising it unimplemented would have the car's assistant accept "play
Radio X" and silently do nothing. emisoraParaBusqueda ranks exact name,
then prefix, then substring, then country, accent- and case-insensitive
because voice transcription rarely gets diacritics right; favourites are
searched first so they win a name tie, and a miss plays nothing rather
than something arbitrary.
Still a hypothesis for the play/pause symptom, not a confirmed fix -- it
is documentation-backed and cheap, but only a head unit can confirm it.
Tests: 1132 -> 1141.
FreeTLab
a6cdf0e72c