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。。。