Android setOnScrollListener on RecyclerView deprecated
addOnScrollListener(OnScrollListener)
means you can add more than one listener to a RecyclerView.
removeOnScrollListener(OnScrollListener)
means you can remove one of the listeners that attached to a specific RecyclerView. If the arg was set null, it equals to clearOnScrollListeners() method.
And, clearOnScrollListeners() let you remove all the listener from a RecyclerView.