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

Nothing is secure when you put it on end-users hand but some common practice may make this harder for attacker to steal data.

• Put your main logic (algorithms) into server side.
• Communicate with server and client; make sure communication b/w server and client is secured via SSL or HTTPS; or use other techniques key-pair generation algorithms (ECC, RSA). Ensure that sensitive information is remain End-to-End encrypted.
• Use sessions and expire them after specific time interval.
• Encrypt resources and fetch them from server on demand.
• Or you can make Hybrid app which access system via webview protect resource + code on server

Multiple approaches; this is obvious you have to sacrifice among performance and security