Android App not showing Azure Notification Hub notification while in foreground

Question

I have Notification Hub setup correctly with FCM and my Android app. The problem is when my app is in foreground the notification never shows but debugger catches on OnPushNotificationReceived so I know the setup is working. Also when the app is backgrounded or not running the notification pops up. I think it has to do with the code which I got from: https://learn.microsoft.com/en-us/azure/notification-hubs/xamarin-notification-hubs-push-notifications-android-gcm

Here is my code:

public void OnPushNotificationReceived(Context context, INotificationMessage message)
    {
        var intent = new Intent(context, typeof(MainActivity));
        intent.AddFlags(ActivityFlags.ClearTop);
        var pendingIntent = PendingIntent.GetActivity(context, 0, intent, PendingIntentFlags.OneShot);

        var notificationBuilder = new NotificationCompat.Builder(context, MainActivity.CHANNEL_ID);

        notificationBuilder.SetContentTitle(message.Title)
                    .SetSmallIcon(Resource.Drawable.ic_launcher)
                    .SetContentText(message.Body)
                    .SetAutoCancel(true)
                    .SetShowWhen(false)
                    .SetContentIntent(pendingIntent);

        var notificationManager = NotificationManager.FromContext(context);

        notificationManager.Notify(0, notificationBuilder.Build());
    }

Any help would be much appreciated

Answer 1

I found the issue to be because no NotificationChannel existed so I created it in the contrstructor:

    public AzureListener()
    {
        var channel = new NotificationChannel(MainActivity.CHANNEL_ID, "General", NotificationImportance.Default);
        var notificationManager = NotificationManager.FromContext(Application.Context);
        notificationManager.CreateNotificationChannel(channel);
    }

It worked after I added this.