Alarm manager for background services

问题

I have implemented the alarm manager to wake up the background services every 15 mins periodically. It is working fine, but since the inclusion of DOZE mode Android 6.0, the seems like behaving strange and not waking up in every 15 mins. Although, I am using the method alarm.setExactAndAllowWhileIdle(), but still not working in Idle state

here is my method for implementing Alarm Manager

 private void serviceRunningBackground()
{
    final Intent restartIntent = new Intent(this, service.class);
    restartIntent.putExtra("ALARM_RESTART_SERVICE_DIED", true);
    alarmMgr = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
   Handler restartServiceHandler;
    restartServiceHandler = new Handler() {
         @Override
         public void handleMessage(Message msg) {
             pintent = PendingIntent.getService(getApplicationContext(), 0, restartIntent, 0);
             if (Build.VERSION.SDK_INT > Build.VERSION_CODES.LOLLIPOP_MR1) {
                 Log.d(TAG, " Marshmellow "+ TIMER_START_TIME);
                 alarmMgr.setExactAndAllowWhileIdle(AlarmManager.RTC_WAKEUP, 900000, pintent);                  
             } else {
                 alarmMgr.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), 900000, pintent);
             }
             sendEmptyMessageDelayed(0, TIMER_START_TIME);
         }
     };
    restartServiceHandler.sendEmptyMessageDelayed(0, 0);
}

Any help would be appreciated..thanks

回答1:

Try this:

public class PollReceiver extends WakefulBroadcastReceiver{
    static final String PERIOD = "period";
    @Override
    public void onReceive(Context context, Intent intent){
         startWakefulService(context,new Intent(context,MyService.class));
         long period = intent.getLongExtra(PERIOD,-1);
         if(period>0){
         scheduleExactAlarm(context,(AlarmManager)context.getSystemService(Context.ALARM_SERVICE),period)
         }
    }


    static void scheduleExactAlarm(Context context,AlarmManager alarms, long period){
    Intent i = new Intent(context,PollReceiver.class);
    PendingIntent pi = PendingIntent.getBroadcast(context,0,i,0);
    if(Build.VERSION.SDK_INT>Build.VERSION_CODES.LOLLIPOP_MR1){
        alarms.setExactAndAllowWhileIdle(AlarmManager.ELAPSED_REALTIME_WAKEUP,
        SystemClock.elapsedRealtime() + period,pi);
    }
}

Ive tested scheduling alarms in this way in Doze and it works. They go off every 15 minutes. Check out https://commonsware.com , thats where I found this method of scheduling a repeating alarm.

来源：https://stackoverflow.com/questions/33432661/alarm-manager-for-background-services