Lists are an important part of almost every app. Lists can be very simple displays of relatively static data, or they can be quite complex, displaying a variety of data and having a diverse set of behaviors. Simple lists can be implemented using components provided with the Android SDK. More complex lists require the development of custom list layouts and adapters.
ContactListActivity is finished! The activity not only displays a list of contacts, but also sorts that list according to user preferences and passes data to the
ContactActivity to display a selected contact.