Exception locking surface

Exception locking surface
E/SurfaceHolder( 4560): java.lang.IllegalArgumentException
E/SurfaceHolder( 4560):         at android.view.Surface.lockCanvasNative(Native Method)
E/SurfaceHolder( 4560):         at android.view.Surface.lockCanvas(Surface.java:76)
E/SurfaceHolder( 4560):         at android.view.SurfaceView$4.internalLockCanvas(SurfaceView.java:745)
E/SurfaceHolder( 4560):         at android.view.SurfaceView$4.lockCanvas(SurfaceView.java:721)
E/SurfaceHolder( 4560):         at cn.hz.d9.dsn.views.LoadingView$ViewDrawThread.run(LoadingView.java:247)

surfaceHolder.lockCanvas()返回null而且报错Exception locking surface 
求大神解答 --------------------编程问答-------------------- 可以参考这个帖子
http://stackoverflow.com/questions/8875702/android-canvas-locking-throws-illegalargumentexception

补充：移动开发 ,  Android