simpletiledlayermidlet.java

一个JAVA手机游戏分块图层的演示程序

package SimpleTiledLayer;

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
// MIDlet主程序
public class SimpleTiledLayerMidlet extends MIDlet implements CommandListener {
	private Display display;							
	private SimpleTiledLayerCanvas gameCanvas;			
	private Command exitCommand, actCommand;		    
	// 在MIDlet启动时进行初始化工作
	public void startApp() {
		display = Display.getDisplay(this);				// 获得显示屏幕对象    
		gameCanvas = new SimpleTiledLayerCanvas();		// 建立GameCanvas对象  
		// 建立Command对象
		exitCommand = new Command("退出", Command.EXIT, 1);	
		actCommand = new Command("改变", Command.SCREEN, 1);	
		gameCanvas.addCommand(exitCommand);
		gameCanvas.addCommand(actCommand);
		gameCanvas.setCommandListener(this);
		gameCanvas.start();								// 启动GameCanvas中的线程体
		display.setCurrent(gameCanvas);
	}
	// Command事件处理程序
	public void commandAction(Command c, Displayable s) {
		if (c == exitCommand) {
			exit();
		}
		else if  (c == actCommand) {
			gameCanvas.act();
		}
	} 
	public void pauseApp() { }
	public void destroyApp(boolean unconditional) { }	
	// 停止线程，结束MIDlet程序
	public void exit() {
		gameCanvas.stop();
		destroyApp(false);
		notifyDestroyed();
	}
}