The library does provide some convenient interfaces to listen to the changes to the SharedPreferences object. However, first, we need to obtain a reference to the RxSharedPreferences object by calling this:

SharedPreferences preferences 
    = PreferenceManager.getDefaultSharedPreferences(context);

RxSharedPreferences rxPreferences 
    = RxSharedPreferences.create(preferences);

After that is done, we can start querying settings using something like this:

final Boolean item1 = rxPreferences.getBoolean("item1").get();

Alternatively, we can use the following:

rxPreferences.getBoolean("item1")
        .asObservable()
        .subscribe(value -> log(value));

Naturally, it exposes interfaces to other types, so it is possible to do the following, along with others:

rxPreferences.getBoolean("key");
rxPreferences.getFloat("key");
rxPreferences.getInteger("key");
rxPreferences.getLong("key");
rxPreferences.getString("key");

Setting properties is also straightforward with this:

rxPreferences.getBoolean("key").set(false);
rxPreferences.getString("key").set("newValue");

However, we won't use this functionality now as we will be relying on Android and its settings related UI to do the SharedPreferences modifications.