android - open a specific activity from firebase notification

Question

I integrated firebase notification to my application but I would like to send a notification that opens a specific activity and does what I schedule to do, not just opening the App. like a notification that will push the user to visit Google play store on clicking it.

I saw a code Firebase console: How to specify click_action for notifications which I used but am getting an error to initialize variable cls. I tried to resolve by defining cls=null, to clear error. It fails to open my specified activity using the click_action

public class ClickActionHelper { 
    public static void startActivity(String className, Bundle extras, Context context){ 
        Class cls=null; 
        try { 
            cls = Class.forName(className);
        } catch (ClassNotFoundException e) { 
            //means you made a wrong input in firebase console 
        } 
        Intent i = new Intent(context, cls);
        i.putExtras(extras); context.startActivity(i); 
    }     
}

please am I getting anything wrong? How do I get this to work?

Answer 1

Waitting for answers