How to ensure that AlarmManager works even if the Android application is closed?

Question

I have an application that needs to update / receive data from the server every six hours. To do this, I created AlarmManager as follows:

public class Repository {

public static AlarmManager alarmManager;

public static void initAlarmManager(Context context){

    //start the update alarm manager
    Intent resultIntent = new Intent(context,AlarmReceiver.class);
    PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, resultIntent, PendingIntent.FLAG_UPDATE_CURRENT);

    alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
    alarmManager.setInexactRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP, 0,  60 * 60 * 1000, pendingIntent);
}

My AlarmReceiver should now look for updates, and if there is new data of a certain condition, it should notify the user through a notification. This is part of my AlarmReceiver:

public class AlarmReceiver extends BroadcastReceiver {

@Override
public void onReceive(Context context, Intent intent) {

    if(Repository.ddfDb == null){
        Repository.initDdfDb(context);
    }

    if(Repository.alarmManager == null){
        Repository.initAlarmManager(context);
    }

    for(Episode episode : Repository.ddfDb.getListOfNextEpisodes()){
        Notification.showNotification(context,episode);
    }
}

}

Since my AlarmManager should start all the time , I let it start when the download is complete. To do this, I added the following to the manifest file:

<receiver android:name=".AlarmReceiver">
        <intent-filter>
            <action android:name="android.intent.action.BOOT_COMPLETED"/>
        </intent-filter>
    </receiver>

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Answer 1

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