小编Chr*_*ris的帖子

我有一个非常简单的Android应用程序,只显示一个空白的白色屏幕.当我按下HOME按钮关闭应用程序,然后尝试再次打开应用程序,它崩溃,我得到"强制关闭"按钮.在Eclipse中我收到此错误,"ActivityManager:警告:活动未启动,因为正在为用户保留当前活动." 我该如何修复此崩溃？

public class HelloAndroid 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 Panel(this));
}

class Panel extends SurfaceView implements SurfaceHolder.Callback {

    private TutorialThread _thread;

    public Panel(Context context) {
        super(context);

        // register our interest in hearing about changes to our surface
        SurfaceHolder holder = getHolder();
        holder.addCallback(this);
        _thread = new TutorialThread(holder, this);

        setFocusable(true);
    }

    @Override
    public void onDraw(Canvas canvas) {

        // Clear the background
        canvas.drawColor(Color.WHITE);
    }

    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int …