logo.java

手机上的坦克大战游戏

import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Graphics;

public class Logo extends Canvas implements Runnable
{
	private Image a;
	private Image b;
	private Image c;
	private int W;
	private int H;
	private int showtime;
	private int cont;
	private Thread th;
	private boolean start;
	private Tank ta;			//main class instance
	
	public Logo(Tank tan)
	{
		ta = tan;
		W = 128;//getWidth()
		H = 128;//getHeight()
		start = true;
		setFullScreenMode(true);
		a = loadimg("/logo1.png");
		b = loadimg("/logo2.png");
		c = loadimg("/logo3.png");
		th = new Thread(this);
		th.start();
		
	}
	public Image loadimg(String imgname)
	{
		Image img=null;
		try
		{
			if(img == null)
			{
				img = Image.createImage(imgname);
			}
		}catch(Exception ee)
		{
			ee.printStackTrace();
		}
		return img;			
	}
	public void run()
	{
		while(start)
		{
			
			try
			{
				showtime++;
				repaint();
				serviceRepaints();
				Thread.sleep(1000);
			}catch(Exception e)
			{
				e.printStackTrace();
			}
		}
	}
	public void paint(Graphics g)
	{
		g.setColor(0xffffff);
		g.fillRect(0,0,W,H);
		switch(cont)
		{
			case 0:
			g.drawImage(a,(128-a.getWidth())/2,(128-a.getHeight())/2,g.TOP|g.LEFT);
			if(showtime<30)
			cont++;
			break;
			case 1:
			g.drawImage(b,(128-b.getWidth())/2,(128-b.getHeight())/2,g.TOP|g.LEFT);
			if(showtime<50)
			cont++;
			break;
			case 2:
			g.drawImage(c,(128-c.getWidth())/2,(128-c.getHeight())/2,g.TOP|g.LEFT);
			if(showtime<70)
			cont=5;
			
			break;
			default:
			a = b = c = null;
			start = false;
			th = null;
			//System.out.println("logo load end!!!!");
			ta.Tk = new TkC(ta);
			Display.getDisplay(ta).setCurrent(ta.Tk);
			break;
		}
	}
}