Game Development Reference
In-Depth Information
Figure 3-2.
Space Blaster running on the emulator
Let's take a look at the class hierarchy for this application.
Understanding Game Architecture
Space Blaster is a relatively simple game. It has three main classes:
•
SpaceBlaster.java
: This is the main activity that bonds the game code with the
Android platform. Its job is to load the game layout and process
Activity
events.
•
SpaceBlasterGame.java
: This is where all the meat resides. This class has all the
game logic, and it processes key and touch events.
SpaceBlasterGame
extends
ArcadeGame
.
•
ArcadeGame.java
: This abstract class encapsulates common functionality. It also
uses a standard Java
TimerTask
to define a game loop, which will repeat itself
infinitely until the user quits the application.
These classes interact with each other and local resources as shown in Figure 3-3.
