Program type already present: android.support.v4.app.INotificationSideChannel$Stub$Proxy

Question

I know it could look like This Question but I could not fix it with the solution proposed and I could not comment on it too. The Error is :

Program type alre         


        

Answer 1

In Android Studio menu Navigate --> Class --> All (check that "Include in all places" checkbox is on) type your Class (INotificationSideChannel) and you will see more than one package of dependencies - just remove one of it from your gradle.build! It often problem when you use both android and androidx dependencies in one project.