j2me精灵动画实现经典案例分析

===================j2me精灵动画实现经典案例分析==========

    今天北京晴和万里，心情也特别的开朗，现在在这边实训的学员比较听话，也比较爱学习，总体对人的感觉特别的亲，现将前日所写的j2me灵动画实现与大家分享，希望对大家有所帮助.
 
    j2me动画游戏总体感觉也是比较容易理解，只要你能体现到角度是怎么变化的那么精灵动画实现对你来说理解应该不是问题。

    呵呵。。说了那么多看我怎么实现精灵动画

//本文章是自己撰写请不要随意转载，否则要付法律责任
package com.redarmy.canvas01;

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

public class ExCanvas extends Canvas {

	public int px = 60, py = 80;// 起始坐标
	public int arc1 = 30, arc2 = 280;// 起始角度

	// 小精灵方向定义
	public static final int UP = 1;
	public static final int DOWN = 2;
	public static final int LEFT = 3;
	public static final int RIGHT = 4;

	// 初始化方向
	public int DIR = 4;

	protected void paint(Graphics arg0) {
		arg0.setColor(0, 255, 0);
		arg0.fillRect(0, 0, this.getWidth(), this.getHeight());
		arg0.setColor(255, 0, 0);
		switch (DIR) {
		case UP:
			arg0.fillArc(px, py, 50, 50, arc1 + 90, arc2); //向上转度90°
			break;
		case DOWN:
			arg0.fillArc(px, py, 50, 50, arc1 + 270, arc2);//向下转度270°
			break;
		case LEFT:
			arg0.fillArc(px, py, 50, 50, arc1 + 180, arc2);//向右转度180°
			break;
		case RIGHT:
			arg0.fillArc(px, py, 50, 50, arc1, arc2);//初始化方向0°
			break;
		default:
			break;
		}
	}

	//按键处理
	protected void keyPressed(int keyCode) {
		System.out.println(keyCode);
		arc1 = 30; arc2 = 280;  //当按键时角度的变化
		//右
		if (keyCode==-4||keyCode==54) {
			DIR=RIGHT;
			px+=8;
			if(px>=this.getWidth()){
				px=0;
			}
		}
		//下
		if (keyCode==-2||keyCode==56) {
			DIR=DOWN;
			py+=8;
			if(py>=this.getHeight()){
				py=0;
			}
		}
		//上
		if (keyCode==-1||keyCode==50) {
			DIR=UP;
			py-=8;
			if(py<=0){
				py=this.getHeight();
			}
		}
		//左
		if (keyCode==-3||keyCode==52) {
			DIR=LEFT;
			px-=8;
			if(px<=0){
				px=this.getWidth();
			}
		}
		this.repaint();
	}

	protected void keyReleased(int keyCode) {
		arc1 = 50; arc2 = 240; //当释放键是角度的变化
		this.repaint();
	}

	protected void keyRepeated(int keyCode) {
		
	}

}
//

//测试类
package com.redarmy.canvas01;

import javax.microedition.lcdui.Display;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;

public class AppMain extends MIDlet{

	public ExCanvas ecs;
	public AppMain(){
		ecs = new ExCanvas();
	}
	protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
	}

	protected void pauseApp() {
		
	}

	protected void startApp() throws MIDletStateChangeException {
		Display.getDisplay(this).setCurrent(ecs);
		
	}

}

      以上文章都有本人自己撰写，请不要随意转载，否则要付法律责任。
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