Performing Application Tasks with Activities

The Android Activity class (android.app.Activity) is core to any Android application. Much of the time, you define and implement an Activity class for each screen in your application. For example, a simple game application might have the following five Activities, as shown in Figure 4.1:

■ A Startup or Splash screen: This activity serves as the primary entry point to the application. It displays the application name and version information and transitions to the Main menu after a short interval.

■ A Main Menu screen: This activity acts as a switch to drive the user to the core Activities of the application. Here the users must choose what they want to do within the application.

■ A Game Play screen: This activity is where the core game play occurs.

■ A High Scores screen: This activity might display game scores or settings.

■ A Help/About screen: This activity might display the information the user might need to play the game.

Figure 4.1 A simple game with five activities.
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