android - 如何通过通知和锁屏控制服务中的音乐播放

Question

请告诉我从通知和锁定屏幕控制媒体播放器(从服务器流式传输 mp3)的代码。我知道这很简单，但我不知道从哪里开始。我实际上对 mediaController 、mediaSessionCompat 和 NotifacationCompat.MediaStyle 了解不多。

请引用代码做说。我只想播放/暂停和关闭图标的图标。

非常非常感谢您。

Answer 1

您需要做的第一件事是注册媒体 session 并设置回调以从锁定屏幕接收事件。

mSession = new MediaSession(this, "MusicService");
mSession.setCallback(new MediaSessionCallback());
mSession.setFlags(MediaSession.FLAG_HANDLES_MEDIA_BUTTONS | MediaSession.FLAG_HANDLES_TRANSPORT_CONTROLS);

创建通知

Notification.Builder notificationBuilder = new Notification.Builder(mService);
notificationBuilder
        .setStyle(new Notification.MediaStyle()
            .setShowActionsInCompactView(new int[]{playPauseButtonPosition})  // show only play/pause in compact view
            .setMediaSession(mSessionToken))
        .setColor(mNotificationColor)
        .setSmallIcon(R.drawable.ic_notification)
        .setVisibility(Notification.VISIBILITY_PUBLIC)
        .setUsesChronometer(true)
        .setContentIntent(createContentIntent(description)) // Create an intent that would open the UI when user clicks the notification
        .setContentTitle(description.getTitle())
        .setContentText(description.getSubtitle())
        .setLargeIcon(art).build()

使用 addAction 添加 Action

Notification notification = createNotification();
if (notification != null) {
    mController.registerCallback(mCb);
    IntentFilter filter = new IntentFilter();
    filter.addAction(ACTION_NEXT);
    filter.addAction(ACTION_PAUSE);
    filter.addAction(ACTION_PLAY);
    filter.addAction(ACTION_PREV);
    mService.registerReceiver(this, filter);

    mService.startForeground(NOTIFICATION_ID, notification);
    mStarted = true;
}

这是关于 Android Music Player Controls on Lock Screen and Notifications 的教程