grid.java

我写的手机版俄罗斯方块游戏! 里面就两个类! 有很详细的注释! 参考文献: 精通java手机游戏与应用程序设计 陈立伟 张克非 黎秀红/编者

import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;

public class grid extends MIDlet implements CommandListener {

	
	private myCanvas canvas;
	private Command startCommand = new Command("开始",Command.SCREEN,1);
	private Command exitCommand = new Command("退出", Command.EXIT, 1);
	private Command pauseCommand = new Command("暂停", Command.SCREEN, 1);

	public grid()
	{
		
		canvas = new myCanvas();
		canvas.addCommand(pauseCommand);
		canvas.addCommand(exitCommand);
		canvas.setCommandListener(this);
		Display.getDisplay(this).setCurrent(canvas);

	}

	protected void startApp() 
	{
	}

	protected void pauseApp()
	{
	}

	protected void destroyApp(boolean arg0) 
	{
	}

	public void commandAction(Command c, Displayable d)
	{
		if (c == exitCommand) 
		{			
			destroyApp(false);			
			notifyDestroyed();
		}
		if (c ==startCommand)
		{	
			canvas.addCommand(pauseCommand);
			canvas.removeCommand(startCommand);
			canvas.start();
			//System.out.println("commandAction()  : "+"start" );
			
			
		}
		if (c == pauseCommand) 
		{		
			canvas.removeCommand(pauseCommand);
			canvas.addCommand(startCommand);		
			canvas.pause();
			//System.out.println("commandAction()  : "+"start" );
			
			
		}
	}	
	
}