实例8--《小鸡快跑》，原书用的是java me 提供的sprite,我使用的我自己写的androidSprite。没什么好说的，很幼稚，但是还是要发，我要实现自己的承诺。下面给出效果图:
mainView.java
package com.wjh.demon_7;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.SurfaceHolder.Callback;
public class MainView extends SurfaceView implements Callback,Runnable{
Thread gameThread = null;
boolean isGame = true;
SurfaceHolder holder = null;
//具体游戏相关
public AndroidSprite m_CockSprite; //小鸡精灵
public Bitmap m_BackImg; //背景图像
//画笔
public Paint backPaint = null;
public Paint forePaint = null;
public MainView(Context context) {
super(context);
// TODO Auto-generated constructor stub
setFocusable(true);
getHolder().addCallback(this);
holder = this.getHolder();
// 具体游戏相关代码
m_BackImg = BitmapFactory.decodeResource(getResources(), R.drawable.back);
Bitmap image = BitmapFactory.decodeResource(getResources(), R.drawable.cock);
//创建小鸡精灵
m_CockSprite = new AndroidSprite( image, 95, 85 );
//设置精灵当前显示的“帧”编号
m_CockSprite.setFrame( 0 );
}
@Override
public void run() {
// TODO Auto-generated method stub
while(isGame)
{
input();
logic();
doDraw();
try {
Thread.sleep(50);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
//开始游戏主线程
public void start()
{
//getWidth与getHeight可分别获取屏幕的宽度和高度
int nPosX = getWidth();
int nPosY = getHeight() - 90;
//设置精灵左上角的位置
m_CockSprite.setPosition( nPosX , nPosY );
// 新建画笔
backPaint = new Paint();
backPaint.setColor(Color.BLACK);
forePaint = new Paint();
forePaint.setColor(Color.WHITE);
m_BackImg = Bitmap.createScaledBitmap(m_BackImg, getWidth(),getHeight(), false);
if(gameThread == null)
{
gameThread = new Thread(this);
gameThread.start();
}
}
//停止游戏主线程
public void stop()
{
isGame = false;
if(gameThread != null)
{
try {
gameThread.join();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
//输入判断
public void input()
{
}
//逻辑判断
public void logic()
{
int n = m_CockSprite.getFrame();
n ++;
//getFrameSequenceLength可获取精灵图像中“帧”的个数
if( n >= m_CockSprite.getFrameSequenceLength() )
n = 0;
m_CockSprite.setFrame(n);
//设置精灵的位置,如果精灵超出屏幕左侧,则让精灵从右侧重新出现
int nPosX = m_CockSprite.getX();
int nPosY = m_CockSprite.getY();
nPosX -= 6;
if( nPosX < -95 )
nPosX = getWidth();
m_CockSprite.setPosition( nPosX, nPosY );
}
public void doDraw()
{
Canvas c = null;
try
{
c = holder.lockCanvas();
synchronized (holder) {
paint(c);
}
}finally{
if(c != null)
{
holder.unlockCanvasAndPost(c);
}
}
}
//画图
public void paint(Canvas canvas)
{
//用黑色清屏
canvas.drawRect(0, 0, getWidth(), getHeight(), backPaint);
canvas.drawBitmap(m_BackImg, 0, 0,forePaint);
//显示精灵的当前“帧”
m_CockSprite.paint(canvas,forePaint);
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
// TODO Auto-generated method stub
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
// TODO Auto-generated method stub
start();
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
// TODO Auto-generated method stub
stop();
}
}
apk文件(将后缀改为apk):Demon_7.zip
源代码:Demon_7.rar