Could not find class 'android.widget.ThemedSpinnerAdapter' [Android Studio]

Question

I am getting this weird error when I try to run my app on a pre API 21 device:

I/Choreographer: Skipped 39 frames!  The application may be doing too much work o         


        

Answer 1

In my situation this was resolved by removing the use of android:tint="?attr/colorControlNormal" within the layout XML file... Maybe this helps others.