I am trying to center a RecyclerView when its layout_width is wrap_content without success
It is related on how the LayoutManager calculates the sizes. Here you have the related bug with some workarounds people have used.
NOTE: With the release 23.2 of the support library now the wrap content is supported, so looks like they fixed it. You can checkout the changelog here
Did you try using a RelativeLayout
instead of Linear Layout and then make the Recyclerview layout_centerHorizontal="true"
According to your question, update on (march 2016)
I suggest you to update to Android Support Library 23.2.1 to support WRAP_CONTENT in RecycleView.
In RecyclerView layout_width to wrap_content was not supported before 23.2.1.
solved some issue like Fixed bugs related to various measure-spec methods
Check http://developer.android.com/tools/support-library/features.html#v7-recyclerview