Alarm not getting stopped

问题:

I am trying to stop the alarm and checking it whether it stopped or not, but it always returns true means alarm is working. I tried to stop the alarm based on the answer in the link https://stackoverflow.com/a/17616299/1226882 but it doesnt work for me.

Please refer the below code

• Start Alarm

  public static void startSchedulerAlaram(Context ctx) {
  
  Calendar calendar = Calendar.getInstance();
  calendar.setTimeInMillis(System.currentTimeMillis());
  calendar.set(Calendar.HOUR_OF_DAY, 0); 
  calendar.set(Calendar.MINUTE, 0);
  calendar.set(Calendar.SECOND, 0);
  calendar.set(Calendar.MILLISECOND, 0);
  
  if (calendar.compareTo(Calendar.getInstance()) <= 0)
      calendar.add(Calendar.DATE, 1);
  
  AlarmManager alarmManager = (AlarmManager) ctx
          .getSystemService(Context.ALARM_SERVICE);
  
  Intent intent = new Intent(ctx, Alaram_Receiver.class);
  intent.setAction(Utility.SCHEDULE_ACTION);
  
  PendingIntent pi = PendingIntent.getBroadcast(ctx, 1, intent,0);
  alarmManager.setRepeating(AlarmManager.RTC_WAKEUP,
  calendar.getTimeInMillis(),AlarmManager.INTERVAL_DAY, pi);
  
  log("Scheduler Alarm", "Started");
  
  }
  

• Stop Alarm

  public static void stopSchedulerAlaram(Context ctx) {
  
  Intent intent = new Intent(ctx, Alaram_Receiver.class);
  intent.setAction(Utility.SCHEDULE_ACTION);
  PendingIntent pendingIntent = PendingIntent.getBroadcast(ctx, 1,
          intent, PendingIntent.FLAG_UPDATE_CURRENT);
  AlarmManager alarmManager = (AlarmManager) ctx
          .getSystemService(Context.ALARM_SERVICE);
  alarmManager.cancel(pendingIntent);
  
  log("Scheduler Alarm", "Stopped");
  }
  

• Check Alarm

  public static boolean checkSchedulerAlaram(Context ctx) {
  
  boolean alarmUp = (PendingIntent.getBroadcast(ctx, 1, new Intent(ctx,Alaram_Receiver.class).setAction(Utility.SCHEDULE_ACTION),
          PendingIntent.FLAG_NO_CREATE) != null);
  
  return alarmUp;
  }
  

回答1:

You have to pass different id for set alarm

PendingIntent.getBroadcast(ctx, id, intent,PendingIntent.FLAG_UPDATE_CURRENT);

For cancel alarm you have pass sameidthat you used for set.

PendingIntent pendingIntent = PendingIntent.getBroadcast(ctx, id,
        intent, PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager alarmManager = (AlarmManager) ctx
        .getSystemService(Context.ALARM_SERVICE);
alarmManager.cancel(pendingIntent);

回答2:

You are using this code to determine if the alarm is set or not:

boolean alarmUp = (PendingIntent.getBroadcast(ctx, 1, new Intent(ctx,Alaram_Receiver.class).setAction(Utility.SCHEDULE_ACTION),
    PendingIntent.FLAG_NO_CREATE) != null);

This code relies on the presence of the PendingIntent to determine if the alarm is scheduled or not.

When you cancel the alarm you do this:

PendingIntent pendingIntent = PendingIntent.getBroadcast(ctx, 1,
    intent, PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager alarmManager = (AlarmManager) ctx
    .getSystemService(Context.ALARM_SERVICE);
alarmManager.cancel(pendingIntent);

This cancels the alarm, but does not remove the PendingIntent from the system. Since you rely on the presence/absence of the PendingIntent to know if the alarm has been scheduled or not you also need to cancel the PendingIntent so that it will be removed from the system. Do that like this (after you cancel the alarm):

pendingIntent.cancel();

回答3:

Here is my code that i am using to cancel the alarm service

Intent intent = new Intent(this, MyReceiver.class);
         PendingIntent sender = PendingIntent.getBroadcast(getApplicationContext(), 0, intent, 0);
         AlarmManager alarmManager = (AlarmManager) getApplicationContext().getSystemService(Context.ALARM_SERVICE);
         alarmManager.cancel(sender);