In-app billing doesn't work:IAB helper is already set up

Question

I have setup In-App Billing for the first time using the new v3 API. When I press the button to purchase, my app crashed, the log is:

java.lang.IllegalStateException: IAB helper is already set up.

What is the cause of this error? Does anyone know a solution to this?

Answer 1

This means you call IABHelper.startSetup() at least twice. This method must be called only onсe. Check out your code and remove second call, which is most likely resides in you OnClickListener.