Request & release audio focus during voice recordings playback

app/src/main/java/org/linphone/activities/main/chat/data/ChatMessageContentData.kt

@@ -26,6 +26,7 @@ import android.text.Spanned
 import android.text.style.UnderlineSpan
 import android.widget.Toast
 import androidx.lifecycle.MutableLiveData
+import androidx.media.AudioFocusRequestCompat
 import java.text.SimpleDateFormat
 import java.util.*
 import kotlinx.coroutines.*
@@ -73,6 +74,7 @@ class ChatMessageContentData(
     val formattedDuration = MutableLiveData<String>()
     val voiceRecordPlayingPosition = MutableLiveData<Int>()
     val isVoiceRecordPlaying = MutableLiveData<Boolean>()
+    var voiceRecordPlayingAudioFocusRequest: AudioFocusRequestCompat? = null
 
     val isAlone: Boolean
         get() {
@@ -257,6 +259,11 @@ class ChatMessageContentData(
             initVoiceRecordPlayer()
         }
 
+        if (voiceRecordPlayingAudioFocusRequest == null) {
+            voiceRecordPlayingAudioFocusRequest = AppUtils.acquireAudioFocusForVoiceRecording(
+                coreContext.context
+            )
+        }
         voiceRecordingPlayer.start()
         isVoiceRecordPlaying.value = true
         tickerFlow().onEach {
@@ -269,6 +276,13 @@ class ChatMessageContentData(
         if (!isPlayerClosed()) {
             voiceRecordingPlayer.pause()
         }
+
+        val request = voiceRecordPlayingAudioFocusRequest
+        if (request != null) {
+            AppUtils.releaseAudioFocusForVoiceRecording(coreContext.context, request)
+            voiceRecordPlayingAudioFocusRequest = null
+        }
+
         isVoiceRecordPlaying.value = false
     }
 

app/src/main/java/org/linphone/activities/main/chat/viewmodels/ChatMessageSendingViewModel.kt

@@ -23,6 +23,7 @@ import android.widget.Toast
 import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.ViewModelProvider
+import androidx.media.AudioFocusRequestCompat
 import java.io.File
 import java.text.SimpleDateFormat
 import java.util.*
@@ -89,6 +90,8 @@ class ChatMessageSendingViewModel(private val chatRoom: ChatRoom) : ViewModel()
 
     val voiceRecordPlayingPosition = MutableLiveData<Int>()
 
+    var voiceRecordPlayingAudioFocusRequest: AudioFocusRequestCompat? = null
+
     private lateinit var voiceRecordingPlayer: Player
     private val playerListener = PlayerListener {
         Log.i("[Chat Message Sending] End of file reached")
@@ -352,6 +355,12 @@ class ChatMessageSendingViewModel(private val chatRoom: ChatRoom) : ViewModel()
             initVoiceRecordPlayer()
         }
 
+        if (voiceRecordPlayingAudioFocusRequest == null) {
+            voiceRecordPlayingAudioFocusRequest = AppUtils.acquireAudioFocusForVoiceRecording(
+                coreContext.context
+            )
+        }
+
         voiceRecordingPlayer.start()
         isPlayingVoiceRecording.value = true
 
@@ -366,6 +375,12 @@ class ChatMessageSendingViewModel(private val chatRoom: ChatRoom) : ViewModel()
             voiceRecordingPlayer.pause()
         }
 
+        val request = voiceRecordPlayingAudioFocusRequest
+        if (request != null) {
+            AppUtils.releaseAudioFocusForVoiceRecording(coreContext.context, request)
+            voiceRecordPlayingAudioFocusRequest = null
+        }
+
         isPlayingVoiceRecording.value = false
     }
 
@@ -415,6 +430,13 @@ class ChatMessageSendingViewModel(private val chatRoom: ChatRoom) : ViewModel()
             voiceRecordPlayingPosition.value = 0
             voiceRecordingPlayer.close()
         }
+
+        val request = voiceRecordPlayingAudioFocusRequest
+        if (request != null) {
+            AppUtils.releaseAudioFocusForVoiceRecording(coreContext.context, request)
+            voiceRecordPlayingAudioFocusRequest = null
+        }
+
         isPlayingVoiceRecording.value = false
     }
 

app/src/main/java/org/linphone/utils/AppUtils.kt

@@ -29,6 +29,9 @@ import android.text.format.Formatter.formatShortFileSize
 import android.util.TypedValue
 import androidx.core.content.res.ResourcesCompat
 import androidx.emoji.text.EmojiCompat
+import androidx.media.AudioAttributesCompat
+import androidx.media.AudioFocusRequestCompat
+import androidx.media.AudioManagerCompat
 import androidx.recyclerview.widget.DividerItemDecoration
 import androidx.recyclerview.widget.LinearLayoutManager
 import java.util.*
@@ -146,5 +149,37 @@ class AppUtils {
             Log.i("[Media Volume] Current value is $currentVolume, max value is $maxVolume")
             return currentVolume <= maxVolume * 0.5
         }
+
+        fun acquireAudioFocusForVoiceRecording(context: Context): AudioFocusRequestCompat {
+            val audioManager = context.getSystemService(Context.AUDIO_SERVICE) as AudioManager
+            val audioAttrs = AudioAttributesCompat.Builder()
+                .setUsage(AudioAttributesCompat.USAGE_MEDIA)
+                .setContentType(AudioAttributesCompat.CONTENT_TYPE_SPEECH)
+                .build()
+
+            val request =
+                AudioFocusRequestCompat.Builder(AudioManagerCompat.AUDIOFOCUS_GAIN_TRANSIENT_EXCLUSIVE)
+                    .setAudioAttributes(audioAttrs)
+                    .setOnAudioFocusChangeListener { }
+                    .build()
+            when (AudioManagerCompat.requestAudioFocus(audioManager, request)) {
+                AudioManager.AUDIOFOCUS_REQUEST_GRANTED -> {
+                    Log.i("[Audio Focus] Voice recording audio focus request granted")
+                }
+                AudioManager.AUDIOFOCUS_REQUEST_FAILED -> {
+                    Log.w("[Audio Focus] Voice recording audio focus request failed")
+                }
+                AudioManager.AUDIOFOCUS_REQUEST_DELAYED -> {
+                    Log.w("[Audio Focus] Voice recording audio focus request delayed")
+                }
+            }
+            return request
+        }
+
+        fun releaseAudioFocusForVoiceRecording(context: Context, request: AudioFocusRequestCompat) {
+            val audioManager = context.getSystemService(Context.AUDIO_SERVICE) as AudioManager
+            AudioManagerCompat.abandonAudioFocusRequest(audioManager, request)
+            Log.i("[Audio Focus] Voice recording audio focus request abandoned")
+        }
     }
 }