ViewPager onPageSelected

The following items do not change when I move the ViewPager.
error:
Attempt to invoke virtual method 'void android.widget.ImageView.setSelected(boolean)' on a null object reference

Start by reproducing the ViewPager navigation described in the issue and inspect the onPageSelected path associated with the null ImageView error. The issue names no source file or test, so first locate that entry point and identify the affected navigation items; done means moving through the ViewPager no longer leaves items unchanged or raises the reported exception.

Written by the indexing model from the issue text.