In my app the user will be able purchase the PRO Version from Google Play but also to redeem a code to activate the PRO Version. Now my question is how can I store this information so that the user can not just go and change a boolean somewhere.In my app the user will be able purchase the PR
阅读背景：
在Android上安全地存储有关购买状态的信息
来源：互联网
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