RecyclerView 27.1.0 and android.arch.paging 1.0.0-alpha4-1 both contains android/support/v7/recyclerview/extensions/ListAdapter.class
Does any body know how to exclude ListAdapter.class from paging component?
Per the Architecture Components Release Notes, you must upgrade to Paging 1.0.0-alpha6 to use Support Library 27.1.0:
apps using Paging must upgrade to Alpha 6, and Support Library 27.1.0 at the same time