SurfaceView教程问题

Question

我找到了一个教程，它看起来像这样：

package com.djrobotfreak.SVTest;

public class Tutorial2D extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(new Panel(this));
    }

    class Panel extends SurfaceView implements SurfaceHolder.Callback {
        private TutorialThread _thread;

        public Panel(Context context) {
            super(context);
            getHolder().addCallback(this);
            _thread = new TutorialThread(getHolder(), this);
        }

        @Override
        public void onDraw(Canvas canvas) {
            Bitmap _scratch = BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher);
            canvas.drawColor(Color.BLACK);
            canvas.drawBitmap(_scratch, 10, 10, null);
        }

        @Override
        public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
            // TODO Auto-generated method stub
        }

        @Override
        public void surfaceCreated(SurfaceHolder holder) {
            _thread.setRunning(true);
            _thread.start();
        }

        @Override
        public void surfaceDestroyed(SurfaceHolder holder) {
            // simply copied from sample application LunarLander:
            // we have to tell thread to shut down & wait for it to finish, or else
            // it might touch the Surface after we return and explode
            boolean retry = true;
            _thread.setRunning(false);
            while (retry) {
                try {
                    _thread.join();
                    retry = false;
                } catch (InterruptedException e) {
                    // we will try it again and again...
                }
            }
        }
    }

    class TutorialThread extends Thread {
        private SurfaceHolder _surfaceHolder;
        private Panel _panel;
        private boolean _run = false;

        public TutorialThread(SurfaceHolder surfaceHolder, Panel panel) {
            _surfaceHolder = surfaceHolder;
            _panel = panel;
        }

        public void setRunning(boolean run) {
            _run = run;
        }

        @Override
        public void run() {
            Canvas c;
            while (_run) {
                c = null;
                try {
                    c = _surfaceHolder.lockCanvas(null);
                    synchronized (_surfaceHolder) {
                        _panel.onDraw(c);
                    }
                } finally {
                    // do this in a finally so that if an exception is thrown
                    // during the above, we don't leave the Surface in an
                    // inconsistent state
                    if (c != null) {
                        _surfaceHolder.unlockCanvasAndPost(c);
                    }
                }
            }
        }
    }
}

无论我做什么，它都不起作用。我正在尝试将我的代码转换为surfaceview但我找不到任何surfaceview程序甚至可以工作（除了android提供的程序）。有谁知道这个错误甚至在说什么？

这是我的logcat信息：http://shrib.com/oJB5Bxqs

Answer 1

如果收到ClassNotFoundException，则应检查Manifest文件。 单击“应用程序”选项卡，然后在“属性”下的右侧查看。

如果您的类名下有红色X标记，请单击“名称”链接并找到要加载的正确类。