java.lang.IllegalArgumentException: The observer is null.

2141 단어 exception
05-28 17:18:34.086: E/AndroidRuntime(973): Caused by: java.lang.IllegalArgumentException: The observer is null.
05-28 17:18:34.086: E/AndroidRuntime(973): 	at android.database.Observable.unregisterObserver(Observable.java:59)
05-28 17:18:34.086: E/AndroidRuntime(973): 	at android.widget.BaseAdapter.unregisterDataSetObserver(BaseAdapter.java:42)
05-28 17:18:34.086: E/AndroidRuntime(973): 	at android.widget.HeaderViewListAdapter.unregisterDataSetObserver(HeaderViewListAdapter.java:256)
05-28 17:18:34.086: E/AndroidRuntime(973): 	at android.widget.AbsListView.onDetachedFromWindow(AbsListView.java:2373)
05-28 17:18:34.086: E/AndroidRuntime(973): 	at android.view.View.dispatchDetachedFromWindow(View.java:9818)
05-28 17:18:34.086: E/AndroidRuntime(973): 	at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:2268)
05-28 17:18:34.086: E/AndroidRuntime(973): 	at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:2266)
05-28 17:18:34.086: E/AndroidRuntime(973): 	at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:2266)
05-28 17:18:34.086: E/AndroidRuntime(973): 	at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:2266)
05-28 17:18:34.086: E/AndroidRuntime(973): 	at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:2266)
05-28 17:18:34.086: E/AndroidRuntime(973): 	at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:2266)
05-28 17:18:34.086: E/AndroidRuntime(973): 	at android.view.ViewGroup.removeAllViewsInLayout(ViewGroup.java:3717)
05-28 17:18:34.086: E/AndroidRuntime(973): 	at android.view.ViewGroup.removeAllViews(ViewGroup.java:3672)

Android 4.0.3, mFrameLayout 호출.removeAllViews();이 오류가 발생했습니다.Android 2.3.3 정상;연구가 필요하다!
이 잘못은 정말 예가 아니다!이미 여기에 제출되었습니다.
http://code.google.com/p/android/issues/detail?id=22751
http://code.google.com/p/android/issues/detail?id=22946

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