WakefulBrodcastReceiver / Alert does not ring (Wakelock? Process killed?)

Question

I've an app which should be an Alarm clock. If I set the Alert time about 5min oder 30min, it will ring as it should, but if I put it something like 4 hours away, it won't ring, neither if my device is never touched (over night) nor if I use it regularly (at day).

In the main method I've got this Wackelock :

PowerManager powman = (PowerManager) getSystemService(POWER_SERVICE);
PowerManager.WakeLock wakeLock = powman.newWakeLock(PowerManager.FULL_WAKE_LOCK,"MyWakelockTag");
wakeLock.acquire();

Then I call my AlarmReceiver like this:

Intent alarmIntent = new Intent(main.this, AlarmReceiver.class);
PendingIntent alarmPendingIntent = PendingIntent.getBroadcast(main.this, 8932, alarmIntent, 0);
AlarmManager manager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
manager.set(AlarmManager.RTC_WAKEUP, AlertDate.getTime(), alarmPendingIntent);

And finally my AlarmReceiver looks like this:

public class AlarmReceiver extends WakefulBroadcastReceiver
{
    @Override
    public void onReceive(Context context, Intent intent)
    {
        main.Alert(context);
    }
}

My Manifest is here:

<uses-permission android:name="android.permission.WAKE_LOCK" />

...

<application

...

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

</application>

So the very shorts question is: why is main.Alert(context); not called after a longer time? Is the process maybe killed by the Android OS ?

Answer 1

@Pixel_95 What's doing main.Alert(context); ? Anyway, PowerManager will need to be FULL_WAKE_LOCK in constructor(not PARTIAL), or something like that, but when you use WakefullBroadcastReceiver, you will need to call completeWakefulIntent(intent); to be able to wake device, and if you do that, you won't need the PowerManager code lines.