Benachrichtigung nach Aktualisierung

public class AlarmReceiver extends BroadcastReceiver{

    @Override
    public void onReceive(Context context, Intent intent) {
        Toast.makeText(context, "anzeigen",
                Toast.LENGTH_LONG).show();

        
    }

}

public void Refresh()
    {
        Intent intent = new Intent(this, AlarmReceiver.class);
        
        PendingIntent sender = PendingIntent.getBroadcast(this, 0, intent, 0);
        
        AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
        
        // Fire Service in 30 seconds, each second
        alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, 30000, 10 * 1000, sender);

    }

 <receiver android:name=".receiver.AlarmReceiver" android:enabled="true">
       </receiver>

        <receiver android:name="DeinReceiver" android:enabled="true">
        <intent-filter>
           <action android:name="Dein.Intent.Name" />
        </intent-filter>
        </receiver>