Android Alarm Manager not firing, trying to send Notification

Question

I'm trying to set up a one-time alarm that will wake up my app and then deliver a notification to the user.

I'm setting the alarm for 1 minute in the future, but my broadcast receiver is never called.

This is how I'm scheduling the AlarmManager and building the Notification:

private void scheduleNotification(Date notificationdate) {
    Log.d("PSBMF", "scheduling notification at "+notificationdate);

    Intent intent = new Intent(Intent.ACTION_DIAL);
    intent.setData(Uri.parse("tel:"+AppController.statewidephone));
    PendingIntent pendingIntent = PendingIntent.getActivity(getActivity(), 0, intent, 0);

    String notificationmessage = "Test Message";
    String channelid = "Channel Id";
    NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(getActivity(), channelid)
            .setSmallIcon(R.drawable.ic_warning_black_36dp)
            .setContentTitle("Notification Title")
            .setContentText("Notification Content")
            .setStyle(new NotificationCompat.BigTextStyle().bigText("Notification Content"))
            .setPriority(NotificationCompat.PRIORITY_MAX)
            .setContentIntent(pendingIntent)
            .setVisibility(NotificationCompat.VISIBILITY_PUBLIC)
            .setDefaults(Notification.DEFAULT_ALL)
            ;

    Notification notification = mBuilder.build();

    Intent notificationIntent = new Intent(mActivity, NotificationPublisher.class);
    notificationIntent.putExtra(NotificationPublisher.NOTIFICATION_ID, 1);
    notificationIntent.putExtra(NotificationPublisher.NOTIFICATION, notification);
    PendingIntent pendingAlarmIntent = PendingIntent.getBroadcast(mActivity, 0, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);

    long notificationTimeInMillis = notificationdate.getTime();
    AlarmManager alarmManager = (AlarmManager)mActivity.getSystemService(Context.ALARM_SERVICE);
    alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, notificationTimeInMillis, pendingAlarmIntent);

}

My NotificationPublisher.class looks like this:

public class NotificationPublisher extends BroadcastReceiver {

    public static String NOTIFICATION_ID = "notification-id";
    public static String NOTIFICATION = "notification";

    public void onReceive(Context context, Intent intent) {

        Log.d("NP", "NOTIFICATION RECEIVED: "+context);

        NotificationManager notificationManager = (NotificationManager)context.getSystemService(Context.NOTIFICATION_SERVICE);

        Notification notification = intent.getParcelableExtra(NOTIFICATION);
        int id = intent.getIntExtra(NOTIFICATION_ID, 0);
        notificationManager.notify(id, notification);

    }
}

and I've registered my NotificationPublisher/BroadcastReceiver by putting this inside the <application/> tag of my manifest:

<receiver android:name=".NotificationPublisher"/>

What else am I missing? Why won't my Alarm get triggered and call the onReceive method?

Answer 1

I think I figured out my problem:

alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, notificationTimeInMillis, pendingAlarmIntent);

should be

alarmManager.set(AlarmManager.RTC_WAKEUP, notificationTimeInMillis, pendingAlarmIntent);