How to avoid reverse engineering of an APK file?

Question

I am developing a payment processing app for Android, and I want to prevent a hacker from accessing any resources, assets or source code from the APK file.<

Answer 1

If your app is this sensitive then you should consider the payment processing part at server side. Try to change your payment processing algorithms. Use android app only for collecting and displaying user information (i.e account balance) and rather than processing payments within java codes, send this task to your server using a secure SSL protocol with encrypted parameters. Create fully encrypted and secure API to communicate with your server.

Of course, It can also be hacked too and it has nothing to do with source codes protection but consider it another security layer to make it harder for hackers to trick your app.