Updating data in an Android RecyclerView

This is a repost of an answer I wrote on Stack Overflow.

There are two main things that I find helpful when exploring a new API: seeing examples (especially ones with pictures) and just trying out all the possibilities. This post will hopefully help you with that as you are learning how to update the adapter data in an Android RecyclerView. If you need help setting up the RecyclerView itself, then see this post or scroll down to the Code section below.