如果我重新创建通知，我应该调用 startforeground(id, notification) 吗？ android 以上奥利奥，api28

Question

嗨!!

我想知道是否应该在每次创建 Notification 时调用 startForeground(id, notification) Object。 或者可以调用 NotificationManger.notify(id, notification) ?

这是我带来的样品

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        if (intent.getAction().equals(Constants.ACTION.STARTFOREGROUND_ACTION)) {
            Log.i(LOG_TAG, "Received Start Foreground Intent ");
            Notification notification = getNotification();
            startForeground(Constants.NOTIFICATION_ID.FOREGROUND_SERVICE,
                    notification);
        } else if (intent.getAction().equals(Constants.ACTION.PREV_ACTION)) {
            Log.i(LOG_TAG, "Clicked Previous");     <---------------------------------1
        } else if (intent.getAction().equals(Constants.ACTION.PLAY_ACTION)) {
            Log.i(LOG_TAG, "Clicked Play");         <---------------------------------2
        } else if (intent.getAction().equals(Constants.ACTION.NEXT_ACTION)) {
            Log.i(LOG_TAG, "Clicked Next");         <---------------------------------3
        } else if (intent.getAction().equals(
                Constants.ACTION.STOPFOREGROUND_ACTION)) {
            Log.i(LOG_TAG, "Received Stop Foreground Intent");
            stopForeground(true);
            stopSelf();
        }
        return START_STICKY;
    }

    private Notification getNotification() {
            Intent notificationIntent = new Intent(this, MainActivity.class);
            notificationIntent.setAction(Constants.ACTION.MAIN_ACTION);
            notificationIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
                    | Intent.FLAG_ACTIVITY_CLEAR_TASK);
            PendingIntent pendingIntent = PendingIntent.getActivity(this, 0,
                    notificationIntent, 0);

            Intent previousIntent = new Intent(this, ForegroundService.class);
            previousIntent.setAction(Constants.ACTION.PREV_ACTION);
            PendingIntent ppreviousIntent = PendingIntent.getService(this, 0,
                    previousIntent, 0);

            Intent playIntent = new Intent(this, ForegroundService.class);
            playIntent.setAction(Constants.ACTION.PLAY_ACTION);
            PendingIntent pplayIntent = PendingIntent.getService(this, 0,
                    playIntent, 0);

            Intent nextIntent = new Intent(this, ForegroundService.class);
            nextIntent.setAction(Constants.ACTION.NEXT_ACTION);
            PendingIntent pnextIntent = PendingIntent.getService(this, 0,
                    nextIntent, 0);

            Bitmap icon = BitmapFactory.decodeResource(getResources(),
                    R.drawable.truiton_short);

            Notification notification = new NotificationCompat.Builder(this)
                    .setContentTitle("Truiton Music Player")
                    .setTicker("Truiton Music Player")
                    .setContentText("My Music")
                    .setSmallIcon(R.drawable.ic_launcher)
                    .setLargeIcon(
                            Bitmap.createScaledBitmap(icon, 128, 128, false))
                    .setContentIntent(pendingIntent)
                    .setOngoing(true)
                    .addAction(android.R.drawable.ic_media_previous,
                            "Previous", ppreviousIntent)
                    .addAction(android.R.drawable.ic_media_play, "Play",
                            pplayIntent)
                    .addAction(android.R.drawable.ic_media_next, "Next",
                            pnextIntent).build();

            return notification;
    }

在#1、#2 和#3 处，通知视图必须更改 playstate_icon、位图、标题等。 所以我必须打电话给 getNotification()

问题！！

我应该打电话吗

  startForeground(id, notification);

或

  NotificationManager.notifiy(id, notification);

在#1、#2 和#3？？？ （或每个重新创建的通知视图）

Answer 1

只需调用notify()。如果您的服务已经是前台服务，则无需调用 startForeground()。

您可以继续更新通知；只需继续使用您第一次调用 startForeground() 时传递的相同通知 ID。系统将了解新通知与前台服务相关联。