The Note to Self app

Despite all we have learned, we are not quite ready to apply a solution to the Note to Self app. We could update our code to store lots of notes in an ArrayList instance, but before we do, we also need a way to display the contents of ArrayList in the UI. It wouldn't look good to throw the whole ArrayList contents into a TextView widget, for example.

The solution is adapters and a special UI layout called RecyclerView. We will get to them in the next chapter.