createMediaPlayer method

Implementation

Future<int> createMediaPlayer() async {
  var i = _index;
  var instance = await ZegoFlutterEngine.instance.createMediaPlayer(i);
  if (instance != null) {
    var mediaPlayer = MediaPlayer();
    mediaPlayer.instance = instance;
    _mediaPlayers[i] = mediaPlayer;
    _index++;
  } else {
    i = -1;
  }
  return i;
}