使用编程自动清除纸盘中的通知（不起作用）

Question

I want to clear the notification tray programmatically. I am using a service and I want to do that ondestroy method:

    protected void dismissProgressNotification() {
    NotificationManager manager = (NotificationManager) 
    getSystemService(Context.NOTIFICATION_SERVICE);

    manager.cancel(PROGRESS_NOTIFICATION_ID);
}

   `  @Override
      public void onDestroy() {
      super.onDestroy();
      uploadTask.cancel();
      dismissProgressNotification()` 

Here is my code but it did not work when I stop the service.

Answer 1

This should work.

NotificationManager notificationManager = (NotificationManager) getApplicationContext().getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.cancel(NOTIFICATION_ID);

Try to use the application context, also you can test canceling all the the notifications

notificationManager.cancelAll();

Check the docs here: https://developer.android.com/reference/android/app/NotificationManager.html#cancel(int)