transformdemo.java

J2ME手机游戏开发技术详解随书光盘

// Any use of this code and/or information below is subject to the
// license terms: http://wireless.java.sun.com/berkeley_license.html

import java.io.IOException;

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

public class TransformDemo    extends MIDlet    implements CommandListener {
  private MyCanvas myCanvas;  //声明MicroTankCanvas
  
  public void startApp() //开始程序
  {
    if (myCanvas == null) 
    {
      try {
        myCanvas = new MyCanvas();//构造实例，注意，之前要判断
        myCanvas.start();        //调用start函数
        Command exitCommand = new Command("Exit", Command.EXIT, 0);//添加exit按键
        myCanvas.addCommand(exitCommand);
        myCanvas.setCommandListener(this);
          }
      catch (IOException ioe)
       {
        System.out.println(ioe);
       }
    }
    
    Display.getDisplay(this).setCurrent(myCanvas);//设置display
  }
  
  public void pauseApp() {}
  
  public void destroyApp(boolean unconditional) 
  {
    if (myCanvas != null)
      myCanvas.stop();//调用stop函数
  }
  
  public void commandAction(Command c, Displayable s) {
    if (c.getCommandType() == Command.EXIT) {
      destroyApp(true);
      notifyDestroyed();//退出
    }
  }
}