Stop draft audio playback when (1) the conversation exits; or (2) the message is sent

src/main/java/org/thoughtcrime/securesms/ConversationActivity.java

@@ -679,6 +679,8 @@ public class ConversationActivity extends PassphraseRequiredActionBarActivity
       extras.putInt(ConversationListFragment.RELOAD_LIST, 1);
     }
 
+    playbackViewModel.stopNonMessageAudioPlayback();
+
     boolean archived = getIntent().getBooleanExtra(FROM_ARCHIVED_CHATS_EXTRA, false);
     Intent intent = new Intent(this, (archived ? ConversationListArchiveActivity.class : ConversationListActivity.class));
     intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
@@ -1151,6 +1153,10 @@ public class ConversationActivity extends PassphraseRequiredActionBarActivity
       inputPanel.clearQuote();
     }
 
+    // Stop draft audio playback regardless, since it is unlikely
+    // we will need background playback for drafts
+    playbackViewModel.stopNonMessageAudioPlayback();
+
     DcContext dcContext = DcHelper.getContext(context);
     Util.runOnAnyBackgroundThread(() -> {
       DcMsg msg = null;

src/main/java/org/thoughtcrime/securesms/components/audioplay/AudioPlaybackViewModel.java

@@ -17,6 +17,8 @@ import androidx.media3.session.MediaController;
 public class AudioPlaybackViewModel extends ViewModel {
   private static final String TAG = AudioPlaybackViewModel.class.getSimpleName();
 
+  private static final int NON_MESSAGE_AUDIO_MSG_ID = 0;  // Audios not attached to a message doesn't have message id.
+
   private final MutableLiveData<AudioPlaybackState> playbackState;
   private @Nullable MediaController mediaController;
   private final Handler handler;
@@ -97,8 +99,12 @@ public class AudioPlaybackViewModel extends ViewModel {
     }
   }
 
+  public void stopNonMessageAudioPlayback() {
+    stopByIds(NON_MESSAGE_AUDIO_MSG_ID);
+  }
+
   // A special method for deleting message, where we only use message Ids
-  public void stopByIds(int[] msgIds) {
+  public void stopByIds(int... msgIds) {
     AudioPlaybackState currentState = playbackState.getValue();
 
     if (mediaController != null && currentState != null) {