This post is to demonstrate how we can handle additional parameters in onesignal. If you don’t know how to add onesignal in android, please visit my previous post.
We need to override OneSignal.NotificationOpenedHandler.

Onesignal is one of the best alternative for firebase push notification. It is easy to use, free for push notification, however it has 30K limit for subscribers. Onesignal almost support all kind of operating systems.It has 860K+ users, who are currenlty using onesignal. For more you can visit its official site.