Android daily notification shows up multiple times at the wrong time

Android daily notification shows up multiple times at the wrong time

I am trying to get an android notification to show up at noon every day.
The notification seems to show up once whenever the device is started,
then somewhat sporadically afterwards.
Here is my service:
public class myService extends Service {
public static final String TAG = "LocationLoggerServiceManager";
@Override
public void onCreate() {
// TODO Auto-generated method stub
super.onCreate();
Log.v(TAG, "on onCreate");
}
@Override
public int onStartCommand(Intent intent, int flags, int startId)
{
PendingIntent contentIntent = PendingIntent.getActivity(this, 0, new
Intent(this, LoginActivity.class), 0);
NotificationCompat.Builder mBuilder =
new NotificationCompat.Builder(this)
.setSmallIcon(R.drawable.ic_launcher)
.setContentTitle("App name")
.setContentText("Notification")
.setContentIntent(contentIntent)
.setDefaults(Notification.DEFAULT_SOUND)
.setAutoCancel(true);
NotificationManager mNotificationManager =
(NotificationManager)
this.getSystemService(Context.NOTIFICATION_SERVICE);
mNotificationManager.notify("main", 1, mBuilder.build());
return super.onStartCommand(intent, flags, startId);
}
@Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return null;
}
}
and Receiver:
public class MyBroadcastReceiver extends BroadcastReceiver {
public static final String TAG = "LocationLoggerServiceManager";
@Override
public void onReceive(Context context, Intent intent) {
Log.d(TAG, "Broadcast Received");
handleMessage(context, intent);
}
private void handleMessage(Context context, Intent intent)
{
PendingIntent contentIntent = PendingIntent.getService(context, 0, new
Intent(context, myService.class), 0);
AlarmManager alarmManager = (AlarmManager)
context.getSystemService(Context.ALARM_SERVICE);
alarmManager.cancel(contentIntent);
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.HOUR_OF_DAY, 12);
calendar.set(Calendar.MINUTE, 00);
calendar.set(Calendar.SECOND, 00);
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP,
calendar.getTimeInMillis(), 24*60*60*1000 , contentIntent);
}
}
Any pointers are appreciated. Thank you.