mygamewithspritecanvas2.java

J2me游戏精灵

import javax.microedition.lcdui.* ;
import javax.microedition.lcdui.game.* ;

public class MyGameWithSpriteCanvas2 extends GameCanvas
implements Runnable
{
        private LayerManager lm;
        private Sprite c1 ;
        private Sprite c2 ;
        public MyGameWithSpriteCanvas2()
        {
                super(true) ;
                lm = new LayerManager();
                c1 = createCharacter("/pic/character1.png") ;
                lm.append(c1);
                System.out.println("c1层的高度"+c1.getHeight());
                System.out.println("c1层的宽度"+c1.getWidth());
                c2 = createCharacter("/pic/character2.png") ;
                c2.setPosition(x,y);
                System.out.println("c2层的高度"+c2.getHeight());
                System.out.println("c2层的宽度"+c2.getWidth());
                lm.append(c2);
        }
        private Sprite createCharacter(String pic)
        {
                Image img = null ;
                try
                {
                        img = Image.createImage(pic);
                }catch(Exception exp)
                {
                        System.out.println(exp);
                }
                return new Sprite(img,64,64)  ;
        }
        boolean conti = true ;
        int rate = 100 ;
        public void run()
        {
                long st = 0 ;
                long et = 0 ;
                Graphics g = getGraphics() ;
                while(conti)
                {
                        st = System.currentTimeMillis() ;
                        input() ;
                        render(g) ;
                        et = System.currentTimeMillis() ;
                        if((et-st)<rate)
                        {
                                try
                                {
                                        Thread.sleep(rate-(et-st));
                                }catch(Exception exp){}
                        }
                }
        }
        int x = 32 ;
        int y = 32 ;
        public void input()
        {
                int keystate = getKeyStates() ;
                if((keystate & UP_PRESSED)!=0)
                {
                        c2.move(0,-2);
                }else if((keystate & DOWN_PRESSED)!=0)
                {
                        c2.move(0,2);
                }else if((keystate & LEFT_PRESSED)!=0)
                {
                        c2.move(-2,0);
                }else if((keystate & RIGHT_PRESSED)!=0)
                {
                        c2.move(2,0);
                }else if((keystate & FIRE_PRESSED)!=0)
                {
                        if(c1.isVisible())
                        {
                                c1.setVisible(false);
                        }else
                        {
                                c1.setVisible(true);
                        }
                }


        }
        public void render(Graphics g)
        {
                g.setColor(255,255,255);
                g.fillRect(0,0,getWidth(),getHeight());

                lm.paint(g,10,10);

                g.setColor(0,0,0);
                g.drawRect(10,10,128,128);
                flushGraphics() ;
        }
        public void start()
        {
                Thread t = new Thread(this) ;
                t.start();
        }
        public void exit()
        {
                conti = false ;
        }
}