android in-app billing sandbox
问题 I'm developing a simple in-app billing library. It works with static responses from google, but now I'd like to test this lib with real in-app products. I have created a test account and I'm trying to buy a product, but google Play is asking me for a credit card. Is there any way to test in-app billing without using a real credit card (a sandbox environment, fake credit card, etc)? I have read here that the only way to test this is using a real credit card with a test account (so you don't