Recyclerview-stickyheaders is an Android library that makes it easy to integrate section headers in your RecyclerView. These sections headers stick to the top as you can see below :
I don't have enought time to maintain this lib anymore. Retrospectively, I'm not sure that ItemDecoration is the best way to implement sticky headers, especially when dynamic add, remove and reorder of items is needed. If you need sticky headers feature, have a look to SuperSLiM. If you are interested by taking ownership of this repository, please contact me.