Android Programming for Beginners

More advanced persistence

Let's think about what we need to do. We want to save a bunch of notes to the internal storage. Being more specific, we want to store a selection of strings and related Boolean values. These strings and Boolean values represent the user's note title, the note's text, and whether or not it is a to-do, important, or idea.

Given what we already know about the SharedPreferences class, at first glance, this might not seem especially challenging until we dig a little deeper into our requirements. What if the user loves our app and ends up with 100 notes? We would need 100 identifiers for the key-value pairs. This is not impossible but is starting to get awkward.

Now, consider that we want to enhance the note app and give the ...