如何在exoplayer中使用play/pause显示通知？

// 创建自定义的MediaSessionCompat.Callback类
private class MyMediaSessionCallback extends MediaSessionCompat.Callback {
    @Override
    public void onPlay() {
        // 创建播放按钮的PendingIntent
        PendingIntent playIntent = ...;

        // 创建通知
        NotificationCompat.Builder builder = new NotificationCompat.Builder(context, CHANNEL_ID)
                .setSmallIcon(R.drawable.ic_play)
                .setContentTitle("正在播放")
                .setContentText("歌曲名称")
                .addAction(R.drawable.ic_pause, "暂停", playIntent);

        // 显示通知
        NotificationManagerCompat notificationManager = NotificationManagerCompat.from(context);
        notificationManager.notify(NOTIFICATION_ID, builder.build());

        // 控制播放器开始播放
        exoPlayer.setPlayWhenReady(true);
    }

    @Override
    public void onPause() {
        // 创建暂停按钮的PendingIntent
        PendingIntent pauseIntent = ...;

        // 创建通知
        NotificationCompat.Builder builder = new NotificationCompat.Builder(context, CHANNEL_ID)
                .setSmallIcon(R.drawable.ic_pause)
                .setContentTitle("已暂停")
                .setContentText("歌曲名称")
                .addAction(R.drawable.ic_play, "播放", pauseIntent);

        // 显示通知
        NotificationManagerCompat notificationManager = NotificationManagerCompat.from(context);
        notificationManager.notify(NOTIFICATION_ID, builder.build());

        // 控制播放器暂停
        exoPlayer.setPlayWhenReady(false);
    }
}

// 在Activity或Fragment中初始化MediaSessionCompat和MediaSessionCompat.Callback
MediaSessionCompat mediaSession = new MediaSessionCompat(context, "tag");
mediaSession.setCallback(new MyMediaSessionCallback());

// 关联MediaSessionCompat和通知栏
NotificationCompat.Builder builder = new NotificationCompat.Builder(context, CHANNEL_ID)
        .setStyle(new androidx.media.app.NotificationCompat.MediaStyle()
                .setMediaSession(mediaSession.getSessionToken()))
        .setSmallIcon(R.drawable.ic_notification);

// 显示通知
NotificationManagerCompat notificationManager = NotificationManagerCompat.from(context);
notificationManager.notify(NOTIFICATION_ID, builder.build());