Android AlarmManager: is there a way to cancell ALL the alarms set?

Question

I am building an app that set 2 alarms for each day of the week (at a certain hour and minute), the alarms repeat week after week forever.

Now the point is: if the user changes the alarms, I will need cancel the previously set alarms.

Is there a way to simply cancel all the alarms set by my application ?

Answer 1

如果要取消先前的警报,那么在PendingIntent中,您的标志应为PendingIntent.FLAG_CANCEL_CURRENT.如果已经创建了PendingIntent,它将阻止生成新的PendingIntent.并确保在设置闹钟之前取消相同的PendingIntent并在此之后设置闹钟.你应该这样试试:

AlarmManager 2AlarmsInWeekAlarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
PendingIntent pendingIntent = PendingIntent.getService/getActivity(context, int, intent, PendingIntent.FLAG_CANCEL_CURRENT);

2AlarmsInWeekAlarmManager.cancel(pendingIntent);

然后你可以使用set或setRepeating方法.在你的情况下它应该是

2AlarmsInWeekAlarmManager.setRepeating(AlarmManager.RTC_WAKEUP, "timeInMillis", "repetitionTimeInMillis", pendingintent);

这可以保证在设置警报之前将使用相同的PendingIntent取消所有先前的警报.

希望你有这个!

Answer 2

我想你可以关注一下:AlarmManager.Cancel

在那个问题/答案:Android:获取所有使用AlarmManager设置的PendingIntents

如前所述,您无法要求AlarmManager告诉您其中的PendingIntent.但我认为你可以使一些PendingIntent类似于你要取消的那个;).

Answer 3

我在取消闹钟时遇到了同样的问题，并解决了它。你应该做的就是简单地做——

1. 创建警报时，保存PendingIntent对象的请求代码（到共享首选项）。
2. 稍后，当您想要取消警报时，请 使用相同的请求代码（显然来自共享首选项）创建相同的 PendingIntent。

3. 调用AlarmManager的cancel()并传入PendingIntent对象，闹钟就会被取消。

   private void cancelAlarm(int requestCode) {
   
   AlarmManager alarmManager2 = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
   
   PendingIntent pendingIntent2 = PendingIntent.getBroadcast(getApplicationContext(),requestCode,new Intent(this, MyBroadCastReceiver.class),0);
   alarmManager2.cancel(pendingIntent2);
   
   Toast.makeText(getApplicationContext(), "Alarm Cancelled - "+ requestCode, Toast.LENGTH_LONG).show();
   

   }