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fix(audio): defer MODE_IN_COMMUNICATION to call start, restore on end

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Root cause: MainActivity set MODE_IN_COMMUNICATION at app launch,
hijacking system audio routing immediately — BT A2DP music dropped to
earpiece, and the pre-existing communication mode confused subsequent
setCommunicationDevice calls for BT SCO.

Fix: MainActivity now only sets volumes. MODE_IN_COMMUNICATION is set
via JNI right before Oboe audio_start() in CallEngine, and MODE_NORMAL
is restored after audio_stop() when the call ends.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Siavash Sameni
2026-04-12 17:29:59 +04:00
parent a37c8b30fe
commit 15c237ceea
3 changed files with 55 additions and 11 deletions
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16
desktop/src-tauri/gen/android/app/src/main/java/com/wzp/desktop/MainActivity.kt
View File

@@ -72,18 +72,22 @@ class MainActivity : TauriActivity() {
* STREAM_VOICE_CALL volume is cranked to max since the in-call volume
* slider is separate from media volume on most devices.
*/
/**
* Pre-flight: only set volumes. Do NOT set MODE_IN_COMMUNICATION here —
* that hijacks the entire audio routing (music stops, BT A2DP drops to
* earpiece) even before a call starts. The Rust side sets the mode via
* JNI when the call engine actually starts, and restores MODE_NORMAL
* when the call ends.
*/
private fun configureAudioForCall() {
try {
val am = getSystemService(Context.AUDIO_SERVICE) as AudioManager
Log.i(TAG, "audio state before: mode=${am.mode} speaker=${am.isSpeakerphoneOn} " +
Log.i(TAG, "audio state: mode=${am.mode} speaker=${am.isSpeakerphoneOn} " +
"voiceVol=${am.getStreamVolume(AudioManager.STREAM_VOICE_CALL)}/" +
"${am.getStreamMaxVolume(AudioManager.STREAM_VOICE_CALL)} " +
"musicVol=${am.getStreamVolume(AudioManager.STREAM_MUSIC)}/" +
"${am.getStreamMaxVolume(AudioManager.STREAM_MUSIC)}")
am.mode = AudioManager.MODE_IN_COMMUNICATION
am.isSpeakerphoneOn = false // default: handset / earpiece
// Crank both voice-call and music volumes so nothing silent slips
// through regardless of which stream actually ends up driving.
val maxVoice = am.getStreamMaxVolume(AudioManager.STREAM_VOICE_CALL)
@@ -91,9 +95,7 @@ class MainActivity : TauriActivity() {
val maxMusic = am.getStreamMaxVolume(AudioManager.STREAM_MUSIC)
am.setStreamVolume(AudioManager.STREAM_MUSIC, maxMusic, 0)
Log.i(TAG, "audio state after: mode=${am.mode} speaker=${am.isSpeakerphoneOn} " +
"voiceVol=${am.getStreamVolume(AudioManager.STREAM_VOICE_CALL)}/$maxVoice " +
"musicVol=${am.getStreamVolume(AudioManager.STREAM_MUSIC)}/$maxMusic")
Log.i(TAG, "volumes set: voiceVol=$maxVoice musicVol=$maxMusic (mode left at ${am.mode})")
} catch (e: Throwable) {
Log.e(TAG, "configureAudioForCall failed: ${e.message}", e)
}