AlarmManager doesn't work on samsung device with Android lollipop 5.0.2

Question

I have an issue with the AlarmManager API, it doesn't fire at all on my samsung device, but it works on other Android device...

My code is like that:

 public void setAlarm(int hourAlarm,  int minutesAlarm, int numeroAlarm, boolean yesOrNoRepeatAlarm) {


    PendingIntent pendingIntent = PendingIntent.getBroadcast(this, numeroAlarm, broadcastIntent, PendingIntent.FLAG_UPDATE_CURRENT);

    Log.i("numeroAlarm", numeroAlarm + "");
    Calendar calendar = Calendar.getInstance();

    if( (calendar.get(Calendar.HOUR_OF_DAY) > hourAlarm) ||
            ( calendar.get(Calendar.HOUR_OF_DAY) == hourAlarm && calendar.get(Calendar.MINUTE) > minutesAlarm)) {

        calendar.add(Calendar.DATE, 1);
    }

    calendar.set(Calendar.HOUR_OF_DAY, hourAlarm);
    calendar.set(Calendar.MINUTE, minutesAlarm);

    Log.i("timeInMillis", calendar.getTimeInMillis() + "");
    Log.i("repeatingAlarm", yesOrNoRepeatAlarm + "");

    if(yesOrNoRepeatAlarm) {

        alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), AlarmManager.INTERVAL_DAY, pendingIntent);
    }
    else {

        alarmManager.setExact(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), pendingIntent);
    }

}

It works perfectly on other device (specially on kitkat) but not on lolipop in my samsung device, do you have any idea please ?

Answer 1

I had the same problem and after a lot of searching and workaround, I figured that Smart Manager of Samsung Devices in Lollipop and above may be the problem. This component can delay the Alarm Manager to goes off, it is triggered after 3 minutes, if the mobile is working on battery and with the screen closed. Of course you can deactivate the Smart Manager look at this :

• Launch Samsung Smart Manager application on the device
• Tap Battery
• Tap App optimization
• Detail
• Find Your APP
• Select "Disabled for"

But in my case it didn't work, neither disabling the Smart Manager worked in 2 Samsung devices with Lollipop . What it did work was to "fool" Smart Manager by refactoring the name of my application's package to contains the String "alert" or "alarm", for example com.example.alarm.myApplication . You can also refer to this link for more information.