Android 游戏开发----【搭建游戏开发框架】

首先来一个Activity

package com.himi;

import android.app.Activity;
import android.os.Bundle;
import android.view.Window;
import android.view.WindowManager;

public class ImageTest extends Activity {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(new MySurfaceView(this));
}
}

接下来是Activyt的View。

注----SurfaceView 是View的子类，也是android对View的加强。其中surfaceView底层用的是双缓冲机制。

下面的程序主要是通过实现runnable接口，让draw方法在线程中执行。当然这里的draw不会自己被调用。

package bsn.cc.dd;

import android.content.Context;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.view.KeyEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.widget.SlidingDrawer;
//注：实现runnable 只有加入Thread thread=new Thread(this);才会去执行runnable中的方法。以为runnable中的run 方法必须放到线程里
public class MySurfaceView extends SurfaceView implements android.view.SurfaceHolder.Callback,Runnable{
private int SW,SH;
private Bitmap bitmap;
private Resources rs;
private Paint paint;
private int robotx=100;
private int roboty=100;
private SurfaceHolder sfh;
private Canvas canvas;
private Thread thread=new Thread(this);

public MySurfaceView(Context context) {
super(context);
//保持屏幕一直亮
this.setKeepScreenOn(true);
rs=this.getResources();
bitmap=BitmapFactory.decodeResource(rs, R.drawable.enemy1);
sfh=this.getHolder();
sfh.addCallback(this);
paint=new Paint();
paint.setColor(Color.BLUE);
//设置无锯齿
paint.setAntiAlias(true);
setFocusable(true);//用来响应按键
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
//如果在初始化的时候获得宽和高将返回0，因为这里的MySurfaceView是继承SurfaceView的，SurfaceView只有通过重写surfaceCreated的
//时候View才是有值的。
SW=this.getWidth();
SH=this.getHeight();
thread.start();

}
@Override
public void run() {
System.out.println("------------");
draw();
try {
Thread.sleep(100);
} catch (Exception e) {
// TODO: handle exception
}
}

public void draw(){
canvas=sfh.lockCanvas();//自己理解是锁到画布开始画
canvas.drawRect(0, 0, SW, SH, paint);
canvas.save();
canvas.clipRect(robotx, roboty, robotx+(bitmap.getWidth()/13), roboty+bitmap.getHeight());

canvas.restore();
//释放画布锁。并显示出画布。
sfh.unlockCanvasAndPost(canvas);.//ok 之后显示画布。这里的save和restore 是一对， lockCanvas和unlockCanvasAndPost是一对
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
// TODO Auto-generated method stub
return super.onKeyDown(keyCode, event);
}
@Override
public boolean onKeyUp(int keyCode, KeyEvent event) {
// TODO Auto-generated method stub
return super.onKeyUp(keyCode, event);

}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {

}

@Override
public void surfaceDestroyed(SurfaceHolder holder) {

}

}

注-- sfh=this.getHolder();

sfh.addCallback(this);是通过getHolder() 来管理sufaceView 。程序中红色字体标示了出来.只有把这两句加上程序才会运行都run。。。