问题
I am creating an app which is free for few modules and I would like users to pay for other modules that are available in this app. I don't want the users to pay and download the full version from playstore. Instead I would like the users to use my app to pay and activate the full version.
I have seen this in lot of games... But I don't know where to start with.
回答1:
You can do this with the Google Play Billing. Develop your game with all the modules and enable/disable the modules according to what the user has bought. In order to do this verification, register products for your app that represents the module
来源：https://stackoverflow.com/questions/14856343/how-to-connect-playstore-payment-gateway-inside-app-in-android