NullPointerException addToRequestQueue(com.android.volley.Request, java.lang.String)' on a null object reference

Question

I\'m using AndroidHive register login and it\'s working fine in example project of this login-register.

But after many attempts trying it with CardViews

Answer 1

As N1to says, you need to add your controller in the AndroidManifest.xml, if you don't add it then the onCreate() is never called and when you call AppController.getInstance() the instance is null.

It also works for me with: