BottomSheetBehavior not in androidX libraries

Question

I was using the BottomSheetBehavior with the original support library:

implementation \'com.android.support:design:27.1.1\' 

W

Answer 1

It turns out that the refactor tool in Android Studio Refactor > Migrate to AndroidX didn't correctly migrate the XML for the BottomSheetBehaviour.

The old location was android.support.design.widget.BottomSheetBehavior, and was not modified by the migration tool. The original XML was:

The new location is com.google.android.material.bottomsheet.BottomSheetBehavior, so the layout needs to become: