Fast scrollbar with indicator for GridView in Material Design style - android

I have a grid, which consist of many cards ordered by alphabet.
I want to achieve behavior similar to standard Android clock app. I.e I need a fast scrollbar with indicator in Material Design for my GridView.
Any ideas? Libraries?
Any help is truly appreciated. Alex. P.S. Sorry for my English:)

Ok. There is a library for that: https://github.com/danoz73/RecyclerViewFastScroller
So I guess it's the best time to start using RecyclerView :)

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