How to Proguard an android project and its modules and libs?

Question

I am using Android Studio, my application uses many modules and libs Is it possible to proguard all modules , libs and the application ? Or I can do it only for the app ?

Answer 1

If you enable Proguard for the app module, that is the module that includes the others, everything will be obfuscated.

To test it:

• create a new project
• add it a new module, let's call it lib
• add some code to the lib, use this code in the app
• enable Proguard for the app, not for the lib
• in Android Studio:
  • Build -> Clean
  • Build -> Build apk
  • Build -> Analyze apk

You should see that all the code is obfuscated, lib and app.