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

I solved the problem looking to the compileSdkVersion in my project. I had 4 modules, 3 of them were compiling with the sdk 22, one was compiling with the sdk 23.

After I changed all of them to the sdk 22, problem solved. So my advice is to check the SDK version and select for all the modules in your project to the same number.

Cheers