Android Proguard - how to keep onClick handlers only referenced from XML layouts

Question

In my Android app I ofter don\'t create a View\'s on-click handler in code, but rely on the ability to specify it in the XML layout file, like this:

Answer 1

I use:

-keepclassmembers class * extends android.app.Activity { 
       public void on*Click(android.view.View); 
}

and then I name all onClick methods like: onCancelBtnClick(), onBackgroundClick(), etc.