Google Play In-app billing V3 - Error - Authentication is Required
问题 I have looked at other similar questions on SO regarding the same issue and all point to the same point. To check the ID of the product. I am implementing in-app purchases for the first time and i think i am using the correct product id in the code. I am following TrivialDrive sample. So, the error is as follows: My product id from Google Play: My code is as follows: package com.xx.xxx; import android.content.Intent; import android.os.Bundle; import android.support.v7.app.AppCompatActivity;