Player.Listener event combinations data gaps

[sampengilly]

Player.Listener event combinations data gaps

[tonihei]

Thanks for the detailed problem description! As you already discovered, onEvents is the best choice to see all 'atomic' state updates in a single method. This method also gives you access to the Player to retrieve any current state values (in your example: the current media item, the playback state and playWhenReady). You are right that this doesn't allow to access additional event parameters like the reason for a playWhenReady change. If you need access to those, the best way is to overwrite the individual callback in addition to onEvents and just save the last parameter so you can use it from onEvents. As long as you check that the event happened, you are guaranteed that the value has been updated with the latest value and can be safely used. Please also see the last sentence in this guide that tries to highlight the same approach: https://developer.android.com/media/media3/exoplayer/listening-to-player-events#individual-callbacks

  int playWhenReadyChangeReason;

  public void onPlayWhenReadyChanged(boolean playWhenReady, int reason) {
   playWhenReadyChangeReason = reason;
  }

  public void onEvents(Player player, Events events) {
    if (events.contains(Player.EVENT_PLAY_WHEN_READY_CHANGED)
        && playWhenReadyChangeReason == Player.PLAY_WHEN_READY_CHANGE_REASON_USER_REQUEST 
        && player.getCurrentMediaItem() != null 
        && (player.getPlaybackState() == Player.STATE_BUFFERING 
            || player.getPlaybackState() == Player.STATE_READY)) {
      // ...
    }
  }