Question

So I have a BroadcastReceiver which looks like this:

public class UpdateReceiver extends BroadcastReceiver {

    public UpdateReceiver() {
    }

    @Override
    public void onReceive(Context context, Intent intent) {
        Calendar cal = Calendar.getInstance();
        cal.add(Calendar.SECOND, 10);
        System.out.println("Broadcast received");       

        PendingIntent operation = PendingIntent.getService(context, 0,new Intent("REFRESH_THAT"), PendingIntent.FLAG_UPDATE_CURRENT);       
        AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
        alarmManager.setInexactRepeating(AlarmManager.ELAPSED_REALTIME, System.currentTimeMillis(), cal.getTimeInMillis(), operation);
    }
}

This is how I call the BroadcastReceiver

 Intent in = new Intent ("REFRESH_BROADCAST");       
 sendBroadcast(in);

And this is my intent-filter in Android Manifest file

<service android:name = ".services.RefreshService">     
    <intent-filter>
        <action android:name="REFRESH_THAT"/>
    </intent-filter>
</service>

<receiver android:name=".services.UpdateReceiver">        
    <intent-filter>
        <action android:name="REFRESH_BROADCAST"/>        
    </intent-filter>    
</receiver>

BroadcastReceiver received a brodcast without any problem, but AlarmManager seems to do nothing. If I call operation.send() it works without a problem, so I presume there is something wrong with AlarmManager.

Answer 1

Alright so finally I found a solution a it was my fault.

I have set int type to AlarmManager.ELAPSED_REALTIME and long triggerAtMillis to System.currentTimeMillis() property of alarmManager.setInexactRepeating(.....) which is wrong, it only can be paired with AlarmManager.RTC / RTC_WAKEUP.

So the functional code is this:

PendingIntent operation = PendingIntent.getService(context, 0,new Intent("REFRESH_THAT"), 0);       
        AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
        alarmManager.setInexactRepeating(AlarmManager.ELAPSED_REALTIME, SystemClock.elapsedRealtime() , 30000, operation);

I should really read API documentation more carefully. If you hover AlarmManager.ELAPSED_REALTIME , it will told you what kind of time trigger you have to use. Hope this my stupid mistake will help someone in future.