Could not find RippleDrawable
The issue is that you need to return a Drawable instead of a RippleDrawable in getPressedColorRippleDrawable. Otherwise, on pre-lollipop devices, you will get a VerifyError.
That code is indeed not being executed. The app crashes because you're receiving a java.lang.VerifyError. Try performing a Project → Clean if you're using Eclipse or Build → Rebuild project if you're using Android Studio.