Android(安卓)SurfaceView的使用

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）

package com.Aina.Android;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.util.Log;import android.view.SurfaceHolder;import android.view.SurfaceView;/** * com.Aina.Android Pro_SurfaceView *  * @author Aina.huang E-mail: 674023920@qq.com * @version 创建时间：2010 Jun 9, 2010 11:22:35 AM 类说明 */public class MyView extends SurfaceView implements SurfaceHolder.Callback,Runnable {private SurfaceHolder holder;public static int x = 100, y = 100;public MyView(Context context) {super(context);Log.i("TAG", "MyView()");holder = this.getHolder();holder.addCallback(this);}public void surfaceChanged(SurfaceHolder holder, int format, int width,int height) {Log.i("TAG", "surfaceChanged()");}public void surfaceCreated(SurfaceHolder holder) {new Thread(this).start();Log.i("TAG", "surfaceCreated()");}public void surfaceDestroyed(SurfaceHolder holder) {Log.i("TAG", "surfaceDestroyed()");}public void run() {try {while (!Thread.currentThread().isInterrupted()) {synchronized (holder) {this.onDraw();}Thread.sleep(100);}} catch (Exception ex) {ex.printStackTrace();}}public void onDraw() {Canvas canvas = holder.lockCanvas();Paint paint = new Paint();paint.setColor(Color.BLACK);Log.i("TAG", canvas.getWidth() + "|" + canvas.getHeight());canvas.drawRect(0, 0, canvas.getWidth(), canvas.getHeight(), paint);paint.setColor(Color.RED);paint.setAntiAlias(true);canvas.drawCircle(x, y, 30, paint);//canvas.drawRect(x, y, a, b, paint);holder.unlockCanvasAndPost(canvas);}}

package com.Aina.Android;import android.app.Activity;import android.os.Bundle;import android.util.Log;import android.view.KeyEvent;import android.view.MotionEvent;public class Test_SurfaceView extends Activity {    /** Called when the activity is first created. */private MyView mv;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        mv = new MyView(this);        setContentView(mv);    }@Overridepublic boolean onKeyDown(int keyCode, KeyEvent event) {        switch (keyCode) {           case KeyEvent.KEYCODE_DPAD_DOWN:// 向下                   MyView.y += 5;               break;           case KeyEvent.KEYCODE_DPAD_UP:// 向上                   MyView.y -= 5;               break;           case KeyEvent.KEYCODE_DPAD_LEFT:// 向左                  MyView.x -= 5;               break;           case KeyEvent.KEYCODE_DPAD_RIGHT:// 向右                   MyView.x += 5;               break;           default:               break;           } return super.onKeyDown(keyCode, event);}@Overridepublic boolean onTouchEvent(MotionEvent event) {int x = (int) event.getX();int y = (int) event.getY();MyView.x = x;MyView.y = y;return super.onTouchEvent(event);}    }

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