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

With Jellybean this has now become a possibility.

$ openssl enc -aes-128-cbc -K 000102030405060708090A0B0C0D0E0F 
-iv 000102030405060708090A0B0C0D0E0F -in my-app.apk -out my-app-enc.apk

$ adb install --algo 'AES/CBC/PKCS5Padding' --key 000102030405060708090A0B0C0D0E0F 
--iv 000102030405060708090A0B0C0D0E0F my-app-enc.apk
        pkg: /data/local/tmp/my-app-enc.apk
Success

Please read the following blog post for further details