Android中SurfaceView的使用示例

SurfaceView在游戏开发中有着举足轻重的地位，它对于画面的控制有着更大的自由度（不像View要用handler来更新，关于View的），但这方面的参考资料并不是太多，能找到的例子都有点喧宾夺主的感觉，不能把使用的流程清晰展示出来，下面是个简单的示例，力求把流程清楚展示，其他的可简则简。

程序效果：用线程画一个蓝色的长方形。

packagecom.ray.test;
 /*
*SurfaceView的示例程序
*演示其流程
*/
 importandroid.app.Activity;
 importandroid.content.Context;
 importandroid.graphics.Canvas;
 importandroid.graphics.Color;
 importandroid.graphics.Paint;
 importandroid.graphics.RectF;
 importandroid.os.Bundle;
 importandroid.view.SurfaceHolder;
 importandroid.view.SurfaceView;

 publicclassTestextendsActivity{
 publicvoidonCreate(BundlesavedInstanceState){
 super.onCreate(savedInstanceState);
 setContentView(newMyView(this));
}

 //内部类
 classMyViewextendsSurfaceViewimplementsSurfaceHolder.Callback{

SurfaceHolderholder;
 publicMyView(Contextcontext){
 super(context);
 holder=this.getHolder();//获取holder
 holder.addCallback(this);
 //setFocusable(true);

}

 @Override
 publicvoidsurfaceChanged(SurfaceHolderholder,intformat,intwidth,
 intheight){

}

 @Override
 publicvoidsurfaceCreated(SurfaceHolderholder){
 newThread(newMyThread()).start();
}

 @Override
 publicvoidsurfaceDestroyed(SurfaceHolderholder){

}

 //内部类的内部类
 classMyThreadimplementsRunnable{

 @Override
 publicvoidrun(){
 Canvascanvas=holder.lockCanvas(null);//获取画布
 PaintmPaint=newPaint();
mPaint.setColor(Color.BLUE);

 canvas.drawRect(newRectF(40,60,80,80),mPaint);
 holder.unlockCanvasAndPost(canvas);//解锁画布，提交画好的图像

}

}

}
}

package com.ray.test;
/*
 * SurfaceView的示例程序
 * 演示其流程
 */
import android.app.Activity;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.RectF;
import android.os.Bundle;
import android.view.SurfaceHolder;
import android.view.SurfaceView;

public class Test extends Activity {
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(new MyView(this));
    }
    
    //内部类
    class MyView extends SurfaceView implements SurfaceHolder.Callback{

    	SurfaceHolder holder;
		public MyView(Context context) {
			super(context);
			holder = this.getHolder();//获取holder
			holder.addCallback(this);
			//setFocusable(true);
			
		}

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

		@Override
		public void surfaceCreated(SurfaceHolder holder) {
			new Thread(new MyThread()).start();
		}

		@Override
		public void surfaceDestroyed(SurfaceHolder holder) {
			
		}
		
		//内部类的内部类
		class MyThread implements Runnable{

			@Override
			public void run() {
				Canvas canvas = holder.lockCanvas(null);//获取画布
				Paint mPaint = new Paint();
				mPaint.setColor(Color.BLUE);
				
				canvas.drawRect(new RectF(40,60,80,80), mPaint);
				holder.unlockCanvasAndPost(canvas);//解锁画布，提交画好的图像
				
			}
			
		}
    	
    }
}

• TestSurfaceView0.1.rar (25.6 KB)