1.首先，我们需要在应用程序的build.gradle文件中引入支持AndroidX的Media库。我们可以使用以下依赖关系：

dependencies { implementation 'androidx.media:media:1.3.0' }

2.创建一个服务来处理音频播放，该服务将负责更新媒体通知。以下是一个示例：

public class AudioPlayerService extends Service implements AudioManager.OnAudioFocusChangeListener { private MediaSessionCompat mMediaSession; private NotificationManagerCompat mNotificationManager;

  // ...

  @Override
  public int onStartCommand(Intent intent, int flags, int startId) {
        // ...

        // 创建一个新的MediaSessionCompat对象。
        mMediaSession = new MediaSessionCompat(this, "AudioPlayerService");
        mMediaSession.setFlags(MediaSessionCompat.FLAG_HANDLES_MEDIA_BUTTONS
                | MediaSessionCompat.FLAG_HANDLES_TRANSPORT_CONTROLS);
       
        // 设置媒体会话的回调。
        mMediaSession.setCallback(new MediaSessionCallback());

        // 启用媒体会话。
        mMediaSession.setActive(true);

        // 创建一个新的MediaStyle通知。
        NotificationCompat.Builder builder = new NotificationCompat.Builder(this, CHANNEL_ID)
                // 设置标题和标题
                .setContentTitle("My Audio Player Service")
                .setContentText("Playing audio in background")
                // 设置媒体样式。
                .setStyle(new androidx.media.app.NotificationCompat.MediaStyle()
                        .setMediaSession(mMediaSession.getSessionToken())
                        .setShowActionsInCompactView(0)
                        .setShowCancelButton(true)
                        .setCancelButtonIntent(getCancelIntent()))

                // 添加Action按钮
                .addAction(new NotificationCompat.Action(android.R.drawable.ic_media_previous,
                        "Previous", getPendingIntent(ACTION_PREVIOUS)))
                .addAction(getPlayPauseAction())
                .addAction(new NotificationCompat.Action(android.R.drawable.ic_media_next,
                        "Next", getPendingIntent(ACTION_NEXT)));

        // 建立通知渠道
        NotificationChannel channel = new NotificationChannel(CHANNEL_ID,
                "My Audio Player Service", NotificationManager.IMPORTANCE_LOW);
        mNotificationManager = NotificationManagerCompat.from(this);
        mNotificationManager.createNotificationChannel(channel);

        // 将通知发布为前台服务通知。
        startForeground(NOTIFICATION_ID, builder.build());

        // ...
    }

  // ...

  // 处理Play/Pause action 按钮
  private NotificationCompat.Action getPlayPauseAction() {
        int icon;
        String title;
        PendingIntent intent;

        if (mMedia.isPlaying()) {
           icon = android.R.drawable.ic_media_pause;
           title = "Pause";
           intent = get