First, I am an iOS developer. I am not Android expert. I need maintain one Android App project. About the app signing issue, the rules between iOS and Android are so different!
At the moment, I know how to sign my Android app and publish it on Google play.
BUT, I found this in Google play Developer Console -> my app ->Services & APIs:
They given me this public key.
My Question is: How to, and where to use this public key? I have signed my app already by ADT's wizard.