The instructions currently in Facebook's Android Tutorial do not work well under Windows. Their example shows how to pipe the keytool output to openssl but if you try this under Windows the output is not valid for some reason.
then you can face with strange bug:
adapter of the second RecyclerView binds all items at the same time!
It causes unpredictable slowing of UI and frustration of developer.
The only solution is to avoid this layout, for example - use RelativeLayout and set RV's