OneSignal.setNotificationWillShowInForegroundHandler(new NotificationWillShowInForegroundHandler() {
   @Override
   void notificationWillShowInForeground(OSNotificationReceivedEvent notificationReceivedEvent) {
     OSNotification notification = notificationReceivedEvent.getNotification();
     // Get custom additional data you sent with the notification
     JSONObject data = notification.getAdditionalData();

     if (/* some condition */ ) {
        // Complete with a notification means it will show
        notificationReceivedEvent.complete(notification);
     }
     else {
       // Complete with null means don't show a notification
       notificationReceivedEvent.complete(null);
    }
  }
});

OneSignal.setNotificationOpenedHandler(
   new OneSignal.OSNotificationOpenedHandler() {
     @Override
     public void notificationOpened(OSNotificationOpenedResult result) {
       String actionId = result.getAction().getActionId();
       String type = result.getAction().getType(); // "ActionTaken" | "Opened"
  
       String title = result.getNotification().getTitle();
     }
});

func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable : Any], fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) {
    print("iOS Native didReceiveRemoteNotification: ", userInfo.debugDescription)
    
    if let customOSPayload = userInfo["custom"] as? NSDictionary {
        if let additionalData = customOSPayload["a"] as? NSDictionary {
            print("additionalData: ", additionalData)
            if let foo = additionalData["foo"] {
                print("foo: ", foo)
            }
        }
        if let notificationId = customOSPayload["i"] {
            print("notificationId: ", notificationId)
        }
        if let launchUrl = customOSPayload["u"] {
            print("launchUrl: ", launchUrl)
        }
    }
    if let aps = userInfo["aps"] as? NSDictionary {
        if let alert = aps["alert"] as? NSDictionary {
            if let messageBody = alert["body"] {
                print("messageBody: ", messageBody)
            }
            if let messageTitle = alert["title"] {
                print("messageTitle: ", messageTitle)
            }
        }
    }
    // This block gets called when the user reacts to a notification received
    let timeInterval = Int(NSDate().timeIntervalSince1970)
    OneSignal.sendTags(["last_push_received": timeInterval])
    
    print("badge number: ", UIApplication.shared.applicationIconBadgeNumber.description)
}