In-App Billing in Android. The exact way?

Question

I\'ve been working on implementing an in-app billing in Android for the app I\'m building. The base app would be free and the in-app apps would come at a price.

I have

Answer 1

1. I changed the public key to one in my dev console (public key)
2. Also changed the code as per above suggestion

On doing both above in-app billing worked.