gamescreen.java

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/*
*  程序员：程鹏    创建时间：2004-09-19
*  功能描述： 实现一个欢迎的屏幕
*/
package j2me.demo;

import javax.microedition.lcdui.*;


public class GameScreen extends Canvas implements Runnable
{  
   // 类实例
   private  fivechess midlet;
   private  volatile Thread splashscreenthread;//线程
   private  Graphics G=null;
   //private  Image offImage;
   //private  Graphics offScreen; 
   private Display gamedisplay;

   private frmMainMenu frmmainmenu;
   

   // 变量
   //private runing;//线程运作的标志 
   private static int canvasHeight, canvasWidth;
   private int farmecount;//动画的帧数

   Image CartoonOneFrame;//动画第一帧
   Image CartoonTwoFrame;//动画第二帧
   Image CartoonThreeFrame;//动画第三帧



   //构造函数
   public GameScreen(fivechess midlet)
   {
      this.midlet=midlet;
	  canvasWidth=getWidth();
      canvasHeight=getHeight();
     
      init();
   }

   // 初始化函数

   private void init()
   {
	  	//offImage =Image.createImage(canvasWidth,canvasHeight);
        //offScreen=offImage.getGraphics();
		try
			{   
           
	  		    Image SplashImage=Image.createImage("/intro1.png");
                //one frame
                CartoonOneFrame =Image.createImage(60,55);
                G=CartoonOneFrame.getGraphics();
			    G.drawImage(SplashImage,0,0,20);
                //two frame
				CartoonTwoFrame=Image.createImage(60,55);
				G=CartoonTwoFrame.getGraphics();
				G.drawImage(SplashImage,0,-55,20);
				//three frame
				CartoonThreeFrame=Image.createImage(60,55);
				G=CartoonThreeFrame.getGraphics();
				G.drawImage(SplashImage,0,-110,20);
	
                G=null;
				SplashImage=null;
				System.out.println("Succued");
			}
			catch(Exception e)
			{
				System.out.println(e);
			}
   }

   // 画函数
   protected void paint(Graphics g)
   {
      drawSplash(g);
   }

   // 启动线程

   public void start()
   {
      farmecount=1;
	  splashscreenthread=new Thread(this);
      splashscreenthread.start();
   }
   
   //执行线程
   
   public void run()
   {
      try
	  {
          while(farmecount<=3)
          {
			  repaint();
              serviceRepaints();
			  Thread.sleep(500);
			  farmecount++;
			  System.out.println(farmecount);
		  }
		  if(farmecount>3)
          { 
			Thread.sleep(5000);
			frmmainmenu = new frmMainMenu();
			gamedisplay=Display.getDisplay(midlet); 
			gamedisplay.setCurrent(frmmainmenu);
		  } 
		  
	  }
	  catch(Exception e)
	  {
		  System.out.println(e);
	  }
   }

  

   // 函数
   synchronized void stop()
   {
     farmecount=7;
   }

   //画动画

   private void drawSplash(Graphics gc)
   {
	   
       Image tempimage=null;
	   switch(farmecount)
	   {
		    case 1://1
				tempimage=CartoonOneFrame;
			    break;
			case 2://2
                tempimage=CartoonTwoFrame;
				break;
			case 3:
                tempimage=CartoonThreeFrame;
                break;
	   }
       
	   gc.setColor(0);
	   gc.fillRect(0,0,canvasWidth,canvasHeight);
	   if(tempimage!=null)
	   {
          System.out.println("draw");
          gc.drawImage(tempimage,(canvasWidth-60)/2,(canvasHeight-55)/2,20);
	   }
   }



}