AlarmManager setExact with WakefulBroadcastReceiver sometimes not exact

by

For Marshmallow era(?), we need some ugly codes like below… 🙁
And “delayInMillis” param should be more than 15 minutes on the API 23.
If not, system ignore the minutes less than 15 minutes.

private void registerExactAlarm(PendingIntent sender, long delayInMillis) {
    final int SDK_INT = Build.VERSION.SDK_INT;
    AlarmManager am = (AlarmManager) mContext.getSystemService(Context.ALARM_SERVICE);
    long timeInMillis = (System.currentTimeMillis() + delayInMillis) / 1000 * 1000;     //> example

    if (SDK_INT < Build.VERSION_CODES.KITKAT) {
        am.set(AlarmManager.RTC_WAKEUP, timeInMillis, sender);
    }
    else if (Build.VERSION_CODES.KITKAT <= SDK_INT  && SDK_INT < Build.VERSION_CODES.M) {
        am.setExact(AlarmManager.RTC_WAKEUP, timeInMillis, sender);
    }
    else if (SDK_INT >= Build.VERSION_CODES.M) {
        am.setExactAndAllowWhileIdle(AlarmManager.RTC_WAKEUP, timeInMillis, sender);
    }
}

More Related Contents:

  1. How to check if AlarmManager already has an alarm set?
  2. android prevent immediate trigger of alarm service if alarm time has passed for the day
  3. Using Alarmmanager to start a service at specific time
  4. AlarmManager fires alarms at wrong time
  5. Calling startActivity() from outside of an Activity?
  6. does Alarm Manager persist even after reboot?
  7. How to make Alarm Manager work when Android 6.0 in Doze mode?
  8. Android AlarmManager – RTC_WAKEUP vs ELAPSED_REALTIME_WAKEUP
  9. Can’t stop the ringing alarm from another activity
  10. How to read “adb shell dumpsys alarm” output
  11. Android: Get all PendingIntents set with AlarmManager
  12. Android cannot pass intent extras though AlarmManager
  13. AlarmManager not working in several devices
  14. android AlarmManager not waking phone up
  15. android: running a background task using AlarmManager
  16. AlarmManager Android Every Day
  17. How to set Alarm in Android programmatically?
  18. i want show notification at 8:00 am everyday
  19. LocalNotification with AlarmManager and BroadcastReceiver not firing up in Android O (oreo)
  20. Difference between AlarmManager and ScheduledExecutorService
  21. How to reset alarm if app is force closed in android
  22. Android alarm is cancelled after closing the application
  23. How does android compare pending intents
  24. How to save scheduled alarm after app was killed by Android or task killer?
  25. Start Android Service after every 5 minutes
  26. Android Oreo killing background services and clears pending alarms, scheduled jobs after entering doze mode
  27. Android Alarm Manager with broadcast receiver registered in code rather than manifest
  28. Android AlarmManager problem with setting & resetting an alarm
  29. What’s “requestCode” used for on PendingIntent?
  30. Need code example on how to run an Android service forever in the background even when device sleeping, like Whatsapp?

Leave a Comment