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androidin-app-purchaseofflineandroid-inapp-purchase

Detecting a free/paid version of an Android app offline using in-app purchases?

I am developing an Android app, and thinking of using in-app purchase to unlock full features of the app.

I want the app to be fully functional even without an active internet connection as well if the user paid, so I don't want to rely on checking the in-app API to check whether they purchased the paid version or not.

boolean userPaid = true;

Could I use shared preferences or internal storage to persist this userPaid data after application close/destroy, and would this be a secure method of storing the data?

Solution

  • you can use simple encrypt to SharedPreferences, Because the mobile rootd are easy to see, folders can be changed.

    see this link for encrypt