I want a sample app along with source code (which ready to be copy-pasted in my app) created in android studio. The app should show interstial ads before opening and closing it. The app's main activity screen should have tool baar with 3 dot buttons containing (aboutus and subscription button) upon clicking subscription button it should show two subscriptions:
1: for three month
1: for 1 year
After purchase of any of the above subscription pack, the ads should be removed during the susbcription period.