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

-keepclasseswithmembers class * {
   public void onSearchClicked(android.view.View );
}

but double check it from proguard doc : http://proguard.sourceforge.net/index.html#/manual/refcard.html

Answer 2

This seems to be the best answer, as it is 100% robust to naming of such methods:

# This will avoid all the onClick listeners referenced from XML Layouts from being removed
-keepclassmembers class * extends android.app.Activity { 
       public void *(android.view.View); 
}

Hope it helps.

Answer 3

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.