surfaceView的简单操作

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package com.example.surfaceviewdemo;

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.util.AttributeSet;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceHolder.Callback;
import android.view.SurfaceView;
/*
 * 自己写SurfaceView:
 * 1.写一个类继承SurfaceView
 * 2.至少提供一个构造方法
 * 3.拿到控制器
 * 4.添加回调事件
 */
/*
 * MVC模式  M：模型 数据业务的处理  C:控制器  V：视图
 * Surface:相当于模型   原生缓冲器（存储的图像数据）的一个句柄（引用）     纵深排序
 * SurfaceView:相当于视图层   负责将原生缓冲器里面的数据显示出来
 * SurfaceHolder：相当于控制器   负责锁定画面，可以往Surface里面绘制数据   同时负责将Surface里面的数据提交给SurfaceView显示
 */
public class MySurfaceView3 extends SurfaceView implements Callback,Runnable
{
    private Bitmap mBitmap;
    
    private SurfaceHolder mHolder;
    private Paint mPaint;
    private Thread mThread;
    private boolean mIsRun = true;
    //构造方法
    public MySurfaceView3(Context context, AttributeSet attrs)
    {
        super(context, attrs);
        init();
    }
    public MySurfaceView3(Context context)
    {
        super(context);
        init();
    }
    
    private void init()
    {
        //创建笔
        mPaint = new Paint();
        mPaint.setAntiAlias(true);
        //拿到控制器
        mHolder = getHolder();
        //增加回调事件
        mHolder.addCallback(this);
        //创建线程
        mThread = new Thread(this);
        
        mBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher);
    }
    //当Surface创建成功后
    @Override
    public void surfaceCreated(SurfaceHolder holder)
    {
        mThread.start();
    }
    
    //当Surface销毁时
    @Override
    public void surfaceDestroyed(SurfaceHolder holder)
    {
        mIsRun = false;
    }
    
    //当Surface发生改变时
    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int width,
            int height)
    {
    }
    
    //线程运行的方法
    @Override
    public void run()
    {
        while(mIsRun)
        {
            //负责数据的更新
            update();
            //负责数据的绘制
            paint();
            
            try
            {
                Thread.sleep(30);
            }
            catch (InterruptedException e)
            {
                e.printStackTrace();
            }
        }
    }
    
    //数据更新
    private void update()
    {
    }
    //绘制
    private void paint()
    {
        Canvas canvas = null;
        try
        {
            //锁定画布
            canvas = mHolder.lockCanvas();
            if(canvas!=null)
            {
                //将画布涂黑
                canvas.drawColor(Color.WHITE);
                //绘制数据
                canvas.drawBitmap(mBitmap, touchX-mBitmap.getWidth()/2, touchY-mBitmap.getHeight()/2, mPaint);
            }
        }
        catch (Exception e)
        {
        }
        finally
        {
            if(canvas!=null)
            {
                //解锁画布并且提交数据
                mHolder.unlockCanvasAndPost(canvas);
            }
        }
    }
    
    private float touchX,touchY;
    @Override
    public boolean onTouchEvent(MotionEvent event)
    {
        touchX = event.getX();
        touchY = event.getY();
        return super.onTouchEvent(event);
    }
    
}

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资源文件列表

SurfaceViewDemo/.classpath , 364
SurfaceViewDemo/.project , 851
SurfaceViewDemo/.settings/org.eclipse.jdt.core.prefs , 177
SurfaceViewDemo/AndroidManifest.xml , 894
SurfaceViewDemo/bin/AndroidManifest.xml , 894
SurfaceViewDemo/bin/classes.dex , 454564
SurfaceViewDemo/bin/classes/com/example/surfaceviewdemo/BuildConfig.class , 363
SurfaceViewDemo/bin/classes/com/example/surfaceviewdemo/MainActivity.class , 711
SurfaceViewDemo/bin/classes/com/example/surfaceviewdemo/MySurfaceView1$1$1.class , 1681
SurfaceViewDemo/bin/classes/com/example/surfaceviewdemo/MySurfaceView1$1.class , 1479
SurfaceViewDemo/bin/classes/com/example/surfaceviewdemo/MySurfaceView1.class , 1645
SurfaceViewDemo/bin/classes/com/example/surfaceviewdemo/MySurfaceView2.class , 2860
SurfaceViewDemo/bin/classes/com/example/surfaceviewdemo/MySurfaceView3.class , 3514
SurfaceViewDemo/bin/classes/com/example/surfaceviewdemo/R$attr.class , 367
SurfaceViewDemo/bin/classes/com/example/surfaceviewdemo/R$dimen.class , 488
SurfaceViewDemo/bin/classes/com/example/surfaceviewdemo/R$drawable.class , 434
SurfaceViewDemo/bin/classes/com/example/surfaceviewdemo/R$id.class , 420
SurfaceViewDemo/bin/classes/com/example/surfaceviewdemo/R$layout.class , 430
SurfaceViewDemo/bin/classes/com/example/surfaceviewdemo/R$menu.class , 415
SurfaceViewDemo/bin/classes/com/example/surfaceviewdemo/R$string.class , 499
SurfaceViewDemo/bin/classes/com/example/surfaceviewdemo/R$style.class , 458
SurfaceViewDemo/bin/classes/com/example/surfaceviewdemo/R.class , 763
SurfaceViewDemo/bin/dexedLibs/android-support-v4-e01015b35e680324898122ac41db808a.jar , 151838
SurfaceViewDemo/bin/resources.ap_ , 40741
SurfaceViewDemo/bin/res/drawable-hdpi/ic_launcher.png , 5964
SurfaceViewDemo/bin/res/drawable-mdpi/ic_launcher.png , 3112
SurfaceViewDemo/bin/res/drawable-xhdpi/ic_launcher.png , 9355
SurfaceViewDemo/bin/res/drawable-xxhdpi/ic_launcher.png , 17889
SurfaceViewDemo/bin/SurfaceViewDemo.apk , 197738
SurfaceViewDemo/gen/com/example/surfaceviewdemo/BuildConfig.java , 169
SurfaceViewDemo/gen/com/example/surfaceviewdemo/R.java , 2502
SurfaceViewDemo/ic_launcher-web.png , 51394
SurfaceViewDemo/libs/android-support-v4.jar , 393154
SurfaceViewDemo/proguard-project.txt , 781
SurfaceViewDemo/project.properties , 563
SurfaceViewDemo/res/drawable-hdpi/ic_launcher.png , 7658
SurfaceViewDemo/res/drawable-mdpi/ic_launcher.png , 3777
SurfaceViewDemo/res/drawable-xhdpi/ic_launcher.png , 12516
SurfaceViewDemo/res/drawable-xxhdpi/ic_launcher.png , 24777
SurfaceViewDemo/res/layout/activity_main.xml , 394
SurfaceViewDemo/res/menu/main.xml , 261
SurfaceViewDemo/res/values-sw600dp/dimens.xml , 201
SurfaceViewDemo/res/values-sw720dp-land/dimens.xml , 275
SurfaceViewDemo/res/values-v11/styles.xml , 332
SurfaceViewDemo/res/values-v14/styles.xml , 389
SurfaceViewDemo/res/values/dimens.xml , 218
SurfaceViewDemo/res/values/strings.xml , 230
SurfaceViewDemo/res/values/styles.xml , 695
SurfaceViewDemo/src/com/example/surfaceviewdemo/MainActivity.java , 747
SurfaceViewDemo/src/com/example/surfaceviewdemo/MySurfaceView1.java , 3043
SurfaceViewDemo/src/com/example/surfaceviewdemo/MySurfaceView2.java , 3153
SurfaceViewDemo/src/com/example/surfaceviewdemo/MySurfaceView3.java , 3664