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androidandroid-widgetalarmmanager

Android Alarm manager is repeating after 5 seconds and ignoring interval time

I am working on a widget application where I have to perform some task in every one minute. So, I am using AlarmManager to achieve this. But no matter whatever I set the interval time, its being repeated in every 5 seconds.

I am using AlarmManager like this:

 final AlarmManager alarm = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
        alarm.cancel(pendingIntent);
        long interval = 60000;
        alarm.setInexactRepeating(AlarmManager.ELAPSED_REALTIME, SystemClock.elapsedRealtime(), interval, pendingIntent);

Thanks in advance.

Solution

  • AlarmManager.ELAPSED_REALTIME is used to trigger the alarm since system boot time. Whereas AlarmManager.RTC uses UTC time.

     alarm.setInexactRepeating(AlarmManager.ELAPSED_REALTIME, SystemClock.elapsedRealtime(), interval, pendingIntent);

    This will start running after system boots and repeats at the specified interval.

    alarm.setInexactRepeating(AlarmManager.RTC, calendar.getTimeInMillis(), interval, pendingIntent);

    This will start running from now and repeats at the specified interval.

    To solve the problem, I suggest using AlarmManager.RTC. In case you want to start the alarm after 1 minute and then repeat, then pass the second param like this:

    calendar.getTimeInMillis() + interval

    Also check out the android documentation and this answer for more explanation in Alarms.