可以使用Player.EventListener接口代替Player.Listener，并在实现onPlayerStateChanged方法时检查事件状态（即播放，暂停，结束等）。在MediaController中发送消息时，使用ExoPlayer的方法来处理状态更改，而不是手动触发监听器。下面是代码示例：

public class MainActivity extends AppCompatActivity implements Player.EventListener {

  private SimpleExoPlayer exoPlayer;
  private MediaController mediaController;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    exoPlayer = new SimpleExoPlayer.Builder(this).build();
    exoPlayer.addListener(this);

    mediaController = new MediaController(this);
    mediaController.setMediaPlayer(new PlayerControl(exoPlayer));
    mediaController.setAnchorView(findViewById(R.id.video_view));
  }

  @Override
  public void onPlayerStateChanged(boolean playWhenReady, int playbackState) {
    if (playbackState == Player.STATE_READY && playWhenReady) {
      // media is playing
    } else if (playbackState == Player.STATE_READY) {
      // media is paused
    } else if (playbackState == Player.STATE_ENDED) {
      // media has ended
    }
  }

  private class PlayerControl implements MediaController.MediaPlayerControl {

    private final SimpleExoPlayer player;

    public PlayerControl(SimpleExoPlayer player) {
      this.player = player;
    }

    @Override
    public void start() {
      player.setPlayWhenReady(true);
    }

    @Override
    public void pause() {
      player.setPlayWhenReady(false);
    }

    @Override
    public int getDuration() {
      return (int) player.getDuration();
    }

    @Override
    public int getCurrentPosition() {
      return (int) player.getCurrentPosition();
    }

    @Override
    public void seekTo(int pos) {
      player.seekTo(pos);
    }

    @Override
    public boolean isPlaying() {
      return player.getPlayWhenReady();
    }

    @Override
    public int getBufferPercentage() {
      return player.get