How to upgrade/downgrade subscriptions in Android InAppBilling?

Question

I spent a week looking for solution to upgrade/downgrade subscriptions on Android InAppBilling.

There\'s a reference page about this function: http

Answer 1

Just use my aidl file and be happy :)

It works perfectly!

https://gist.github.com/cre8ivejp/21b10fbbc7e500f99059

*Do not change the order of the methods inside aidl file or it will not work.