examplegamesprite.java

J2ME的源码！我以前学习J2ME的源码哈！非常适合初学者

package TestSprite;

import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.game.GameCanvas;
import javax.microedition.lcdui.game.LayerManager;
import javax.microedition.lcdui.game.Sprite;
import javax.microedition.lcdui.game.TiledLayer;

public class ExampleGameSprite extends GameCanvas implements Runnable {
	private boolean isplay;

	private Sprite hero = null;

	private TiledLayer bg1 = null;

	private TiledLayer bg2 = null;

	private int drawX = 0;

	private int drawY = 0;

	private int spriteX, spriteY;

	private Graphics g;

	private int viewWindowX;

	private int screenWidth;

	private static final int MOUNTAIN_WIDTH = 433;

	private LayerManager layermanager;

	private void initLayerManager() {
		layermanager = new LayerManager();
		layermanager.append(hero);
		layermanager.append(bg1);
		layermanager.append(bg2);

	}

	private void draw() {
		layermanager.setViewWindow(viewWindowX, drawY, 240, 320);
		layermanager.paint(g, 0, 0);
		flushGraphics();
	}

	private void move() {
		if (viewWindowX > 0) {
			viewWindowX--;
		} else {
			viewWindowX = MOUNTAIN_WIDTH - screenWidth;
		}
		hero.nextFrame();
		// 设置sprite图层在LayerManager坐标系中的位置
		hero.setPosition(spriteX + viewWindowX, 100);
	}
	private void keypressed(){
		int keyState=getKeyStates();//注意getKeyStates的写法,有两个字母需大写;
		if((LEFT_PRESSED&keyState)!=0){
			if (viewWindowX > 0) {
				viewWindowX--;
			} else {
				viewWindowX = MOUNTAIN_WIDTH - screenWidth;
			}
			
			// 设置sprite图层在LayerManager坐标系中的位置
			hero.setTransform(Sprite.TRANS_NONE);
			hero.setPosition(spriteX + viewWindowX, 100);
			hero.nextFrame();
		}
		
		if((RIGHT_PRESSED&keyState)!=0){
			if (viewWindowX< MOUNTAIN_WIDTH - screenWidth) {
				viewWindowX++;
			} else {
				viewWindowX = 0;
			}
			
			// 设置sprite图层在LayerManager坐标系中的位置
			hero.setTransform(Sprite.TRANS_MIRROR);
			hero.setPosition(spriteX + viewWindowX, 100);
			hero.nextFrame();
		}
	}

	public ExampleGameSprite() {

		super(true);

		g = getGraphics();
		screenWidth = getWidth();
		viewWindowX = MOUNTAIN_WIDTH - screenWidth;
		spriteX = 100;
		try {
			Image image = Image.createImage("/kid.png");
			Image b_image = Image.createImage("/bg.png");
			Image c_image = Image.createImage("/mountain.png");
			bg1 = new TiledLayer(1, 1, c_image, 433, 214);// 1行1列,引用c_image,图象的宽,高;
			bg1.setPosition(0, 106);// 设置图片的X与Y座标
			bg1.setCell(0, 0, 1);// 0,0是设置0行0列,1是指第一帧图象

			bg2 = new TiledLayer(2, 1, b_image, 240, 320);
			bg2.setCell(0, 0, 1);
			bg2.setCell(1, 0, 1);

			hero = new Sprite(image, 130, 203);
			hero.setPosition(spriteX + viewWindowX, 100);// 这里定义的是X与Y的起始位置;

		} catch (Exception e) {
			e.printStackTrace();
		}

		initLayerManager();

	}

	public void start() {
		isplay = true;
		Thread t = new Thread(this);// 一定记得在这里加入this 才能进入调用
		t.start();
	}

	public void stop() {
		isplay = false;
	}

	public void run() {
		while (isplay) {
			try {
				Thread.sleep(400);
			} catch (InterruptedException e) {
				e.printStackTrace();
			}	
			draw();
//			move();
			keypressed();
			
		}

	}

}