先看代码

public class SurfaceViewActivity extends Activity {

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        requestWindowFeature(Window.FEATURE_NO_TITLE);

        getWindow().setFlags(

                WindowManager.LayoutParams.FLAG_FULLSCREEN,

                WindowManager.LayoutParams.FLAG_FULLSCREEN);

        setContentView(new MySurfaceView(this));

    }

}

public class MySurfaceView extends SurfaceView implements SurfaceHolder.Callback {

    private SurfaceHolder surfaceHolder;

    private Paint paint;

    public MySurfaceView(Context context) {

        super(context);

        surfaceHolder = getHolder();

        surfaceHolder.addCallback(this);

        paint = new Paint();

        paint.setColor(Color.RED);

    }

    @Override

    public void surfaceCreated(SurfaceHolder holder) {

        Log.i("Logzy", Thread.currentThread().getName() + ":surfaceCreated");

        myDraw();

    }

    @Override

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

        Log.i("Logzy", Thread.currentThread().getName() + ":surfaceChanged");

    }

    @Override

    public void surfaceDestroyed(SurfaceHolder holder) {

        Log.i("Logzy", Thread.currentThread().getName() + ":surfaceDestroyed");

    }

    private void myDraw() {

        Canvas canvas = surfaceHolder.lockCanvas();

        canvas.drawRect(0, 0, 100, 100, paint);

        surfaceHolder.unlockCanvasAndPost(canvas);

    }

    @Override

    public void onWindowFocusChanged(boolean hasWindowFocus) {

        super.onWindowFocusChanged(hasWindowFocus);

        Log.i("Logzy", Thread.currentThread().getName() + ":onWindowFocusChanged");

    }

}

重写了surfaceCreated,surfaceChanged,surfaceDestroyed,onWindowFocusChanged这几个方法.运行程序,结果是:

04-13 08:56:03.111  13682-13682/edu.cgxy.surfaceview I/Logzy﹕ main:surfaceCreated

04-13 08:56:03.111  13682-13682/edu.cgxy.surfaceview I/Logzy﹕ main:surfaceChanged

04-13 08:56:03.141  13682-13682/edu.cgxy.surfaceview I/Logzy﹕ main:onWindowFocusChanged

再把程序切换到后台,结果是

04-13 08:59:49.661  13682-13682/edu.cgxy.surfaceview I/Logzy﹕ main:onWindowFocusChanged

04-13 08:59:49.791  13682-13682/edu.cgxy.surfaceview I/Logzy﹕ main:surfaceDestroyed