解决java.lang.NullPointerException Attempt to read from field 'int android.view.View.mViewFlags' on a

最近碰到一个错误，所有日志如下

# main(1)

java.lang.NullPointerException

Attempt to read from field 'int android.view.View.mViewFlags' on a null object reference

解析原始

1 android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3697)

2 android.view.View.updateDisplayListIfDirty(View.java:16182)

3 android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:648)

4 android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:654)

5 android.view.ThreadedRenderer.draw(ThreadedRenderer.java:762)

6 android.view.ViewRootImpl.draw(ViewRootImpl.java:2800)

7 android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2608)

8 android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2215)

9 android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1254)

10 android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6343)

11 android.view.Choreographer$CallbackRecord.run(Choreographer.java:874)

12 android.view.Choreographer.doCallbacks(Choreographer.java:686)

13 android.view.Choreographer.doFrame(Choreographer.java:621)

14 android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:860)

15 android.os.Handler.handleCallback(Handler.java:751)

16 android.os.Handler.dispatchMessage(Handler.java:95)

17 android.os.Looper.loop(Looper.java:154)

18 android.app.ActivityThread.main(ActivityThread.java:6119)

19 java.lang.reflect.Method.invoke(Native Method)

20 com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)

21 com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)

并没有报在我们自己写代码里面，提示就一个空指针，真的无从下手，最后弄了一个方法居然解决了，但不知其原理，这里做个记录，路过的大神不吝赐教下小弟了



解决方法如下：

new Handler().post(new Runnable() {
@Override
public void run() {
((ViewGroup) mGuideView.getParent()).removeView(mGuideView);
}
});

用一个handler对象把这句代码post下，把消息装入消息队列，其实都是在主线程里面的进行的，但是就不报错了，或许跟消息队列有关吧