Android Programming Concepts

3	Activities and Intents

Chapter Objectives

In this chapter you will:

•  Explore an Activity’s lifecycle.

•  Learn about saving and restoring an Activity.

•  Understand Intents and how they are used with multiple Activities.

•  Become familiar with passing data between Activities.

•  Implement applications that require basic animation Activity transitions.

•  Study Scene transitions.

■  3.1 Activity Lifecycle

All Android applications comprise at least one Activity class. In most cases, applications will require the use of several activities. Consider a chess game application that allows opponents to play a game and chat during the game. Such an application, as shown in Figure 3-1, might utilize one activity for chess play and a separate activity ...