How to build a Horizontal ListView with RecyclerView?
When you use a RecyclerView, you need to specify a LayoutManager that is responsible for laying out each item in the view. The LinearLayoutManager allows you to specify an orientation, just like a normal LinearLayout would.
To create a horizontal list with RecyclerView, you might do something like this:
LinearLayoutManager layoutManager
= new LinearLayoutManager(this, LinearLayoutManager.HORIZONTAL, false);
RecyclerView myList = findViewById(R.id.my_recycler_view);
myList.setLayoutManager(layoutManager);