How to make apk Secure. Protecting from Decompile

Question

I am developing an application that has SQLite database to store personal information that must be protected. What are some ways of protecting these personal data? An APK ca

Answer 1

If it is the database that contains sensitive data you can encrypt the values of several columns or the full database like mentioned in the other answer and make sure that the password is not stored on the device but has to be entered by the user on accessing the data.

If there are pieces of code you need to protect there's really no good way of securing it. All you can for a limited amount of use-cases is to create a dependency to an online service and secure the server. But for a lot of applications this would not be an option.