mysprite.java

J2ME的源码！我以前学习J2ME的源码哈！非常适合初学者

package sprite;

import java.io.IOException;

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

public class MySprite extends GameCanvas implements Runnable {

	private static final int FRAME_WIDTH = 130;

	private static final int FRAME_HEIGHT = 203;

	private Sprite sprite;

	private Graphics g;

	private int spriteX;

	private int spriteY;
	
	protected MySprite(boolean suppressKeyEvents) {
		super(suppressKeyEvents);
		g = getGraphics();
		initSprite();
		startThread();
	}

	private void initSprite() {
		spriteX = getWidth() / 3;
		spriteY = getHeight() - FRAME_HEIGHT - 10;
		try {
			Image image = Image.createImage("/sprite/kid.png");
			sprite = new Sprite(image, FRAME_WIDTH, FRAME_HEIGHT);
		} catch (IOException e) {
			e.printStackTrace();
		}
		sprite.setPosition(spriteX, spriteY);
	}

	private void startThread() {
		Thread thread = new Thread(this);
		thread.start();
	}

	public void run() {
		while (true) {
		move();
			draw();
			sleep();
		}
	}

	private void draw() {
		g.setColor(0x998877);
		g.fillRect(0, 0, getWidth(), getHeight());
		sprite.paint(g);
		flushGraphics();
	}

	private void sleep() {
		try {
			Thread.sleep(1000);
		} catch (InterruptedException e) {
			e.printStackTrace();
		}
	}

	private void move() {
		System.out.println(sprite.getX());
		System.out.println(sprite.getY());
		System.out.println(spriteX);
		System.out.println(spriteY);
		System.out.println("getWidth: " + sprite.getWidth());
		System.out.println("getHeight: " + sprite.getHeight());
		System.out.println("befre, getRefPixelX: " + sprite.getRefPixelX());
		System.out.println("befre, getRefPixelY: " + sprite.getRefPixelY());
		
		if (spriteX > FRAME_WIDTH / 5) {
			spriteX -= FRAME_WIDTH / 5;
		} else {
			spriteX = getWidth() - FRAME_WIDTH;
		}
		
		// 相对于当前的reference pixel
		sprite.defineReferencePixel(sprite.getWidth() / 2, sprite.getHeight() / 2);
		// 相对于坐标系
//		sprite.setRefPixelPosition(sprite.getX() + sprite.getWidth() / 2, sprite.getY() + sprite.getHeight() / 2);
		System.out.println("after, getRefPixelX: " + sprite.getRefPixelX());
		System.out.println("after, getRefPixelY: " + sprite.getRefPixelY());
		
		
		sprite.setPosition(spriteX, spriteY);
//		sprite.setTransform(Sprite.TRANS_NONE);
//		sprite.setTransform(Sprite.TRANS_MIRROR);
//		sprite.setTransform(Sprite.TRANS_MIRROR_ROT90);
		sprite.setTransform(Sprite.TRANS_MIRROR_ROT180);
//		sprite.setTransform(Sprite.TRANS_MIRROR_ROT270);
//		sprite.setTransform(Sprite.TRANS_ROT90);
//		sprite.setTransform(Sprite.TRANS_ROT180);
//		sprite.setTransform(Sprite.TRANS_ROT270);
		sprite.nextFrame();
	}

}