huarongroad.java

my华容道

//MIDlet主类
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
public class HuaRongroad extends MIDlet implements CommandListener
{
    private static HuaRongroad instance;
    public static ImageCanvas canvas;
    private Display display;
    private Command cmd_Exit;
    private Command cmd_Start;
    private Command cmd_Help; 
    
	public HuaRongroad()
	{
		        instance=this;
		        display=Display.getDisplay(this);
                canvas=new ImageCanvas();
                cmd_Start=new Command("Start",Command.SCREEN,1);
		        cmd_Exit=new Command("Exit",Command.EXIT,1);            
                cmd_Help=new Command("Help",Command.SCREEN,1);
	         	canvas.addCommand(cmd_Exit);
                canvas.addCommand(cmd_Start);
                canvas.addCommand(cmd_Help);                
	        	canvas.setCommandListener(this);                
	}
	public void startApp() throws MIDletStateChangeException
	{
           
           display.setCurrent(canvas);
	}
	public void pauseApp(){}
	public void destroyApp(boolean unconditional){}
    public void commandAction(Command c,Displayable d)
    {
        if(c==cmd_Start)    
               display.setCurrent(new SelectScreen());        //进入选择游戏画面        
        else if(c==cmd_Help)
              Help.showAbout(Display.getDisplay(this));       //显示帮助中的内容
        else if(c==cmd_Exit)   
            { 
                 destroyApp(false);
                 notifyDestroyed();
            }  
    }
  public static void setCurrent(Displayable displayable)      //重载setCurrent方法
  {
  	Display.getDisplay(instance).setCurrent(displayable);
  } 
  class ImageCanvas extends Canvas
      {
         public void paint(Graphics g)
           {
             try{
                 Image image=Image.createImage("/huarongroad/BACKROUND.png"); //显示开始画面
                 g.drawImage(image,0,0,Graphics.TOP|Graphics.LEFT);
                }catch(Exception e){
                 e.printStackTrace(); } 
          }
     }
}