在調用此方法之前，光標被停用

我有一個CursorAdapter，我將數據交換到onLoadFinished()回調中。之後，我還需要使用相同的光標來處理多個其他CursorAdapters（下面僅顯示1個）。問題是，光標data被交換到原始CursorAdapter後，我得到以下錯誤。如果我在原來的CursorAdapter之後在應用中使用getCursor()，那麼它的工作原理沒有任何錯誤。這是爲什麼？異步或swapCursor()是什麼？我以爲這麼初始，但我試圖將dataCursor直接設置到其他CursorAdapters它仍然有我的錯誤。那麼是什麼給了？有任何想法嗎？在調用此方法之前，光標被停用

@Override 
    public void onLoadFinished(Loader<Cursor> loader, Cursor data) 
    { 
     mAccountsCursorAdapter.swapCursor(data); 
     // create new cursor adapter 
     Cursor cursor = new CursorWrapper(mAccountsCursorAdapter.getCursor()); 
     mNewAccountsCursorAdapter.swapCursor(cursor); 
    }

錯誤如下：

android.database.StaleDataException: Attempting to access a closed CursorWindow.Most probable cause: cursor is deactivated prior to calling this method. 
      at android.database.AbstractWindowedCursor.checkPosition(AbstractWindowedCursor.java:139) 
      at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:50) 
      at android.database.CursorWrapper.getString(CursorWrapper.java:114) 
      at android.database.CursorWrapper.getString(CursorWrapper.java:114) 
      at android.support.v4.widget.SimpleCursorAdapter.bindView(SimpleCursorAdapter.java:135) 
      at android.support.v4.widget.CursorAdapter.getView(CursorAdapter.java:256) 
      at android.widget.AbsSpinner.onMeasure(AbsSpinner.java:197) 
      at android.widget.Spinner.onMeasure(Spinner.java:507) 
      at android.view.View.measure(View.java:17430) 
      at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:727) 
      at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:463) 
      at android.view.View.measure(View.java:17430) 
      at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463) 
      at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436) 
      at android.widget.LinearLayout.measureVertical(LinearLayout.java:722) 
      at android.widget.LinearLayout.onMeasure(LinearLayout.java:613) 
      at android.view.View.measure(View.java:17430) 
      at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:727) 
      at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:463) 
      at android.view.View.measure(View.java:17430) 
      at android.widget.ScrollView.measureChildWithMargins(ScrollView.java:1260) 
      at android.widget.FrameLayout.onMeasure(FrameLayout.java:430) 
      at android.widget.ScrollView.onMeasure(ScrollView.java:337) 
      at android.view.View.measure(View.java:17430) 
      at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:727) 
      at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:463) 
      at android.view.View.measure(View.java:17430) 
      at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463) 
      at android.widget.FrameLayout.onMeasure(FrameLayout.java:430) 
      at android.view.View.measure(View.java:17430) 
      at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463) 
      at android.widget.FrameLayout.onMeasure(FrameLayout.java:430) 
      at android.view.View.measure(View.java:17430) 
      at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463) 
      at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436) 
      at android.widget.LinearLayout.measureVertical(LinearLayout.java:722) 
      at android.widget.LinearLayout.onMeasure(LinearLayout.java:613) 
      at android.view.View.measure(View.java:17430) 
      at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463) 
      at android.widget.FrameLayout.onMeasure(FrameLayout.java:430) 
      at android.view.View.measure(View.java:17430) 
      at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463) 
      at android.widget.FrameLayout.onMeasure(FrameLayout.java:430) 
      at android.view.View.measure(View.java:17430) 
      at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463) 
      at android.widget.FrameLayout.onMeasure(FrameLayout.java:430) 
      at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2560) 
      at android.view.View.measure(View.java:17430) 
      at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2001) 
      at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1141) 
      at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1372) 
      at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1054) 
      at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5779) 
      at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767) 
      at android.view.Choreographer.doCallbacks(Choreographer.java:580) 
      at android.view.Choreographer.doFrame(Choreographer.java:550) 
      at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753)

來源

2014-11-24 Bogdan Zurac

顯然是因爲在代碼中的一些問題上，onLoadFinished()回調被稱爲兩次幾乎在同一時間，這可能沒有對data了良好的影響Cursor。因此，如果遇到此問題，請仔細檢查您的代碼。

來源

2014-11-25 20:02:34

你可以更深入地解釋這一點嗎？什麼可能導致'onLoadFinished（）'連續調用兩次？我目前正在處理同樣的症狀。 – 2015-07-06 10:33:19

我真的不記得爲什麼onLoadFinished（）在我的用例中被調用過兩次。即使我記得，它可能與您的使用案例不一樣。這些問題實際上取決於每個實現，因此它們可能會有很大的差異，這可能是爲什麼我沒有詳細描述當時的實際原因。回想起來，我可能還會補充細節。但不幸的是，時間已過去。對於你的情況，嘗試使用內置的AS調試器來調試你的代碼，我發現它在這種情況下非常有用。 – 2015-07-06 10:38:38

是的，現在已經調試了一段時間，像我的情況下的接縫可能與我調用'initLoader（）'的地方有關。它看起來像不喜歡我改變方向後再次調用它。 – 2015-07-06 10:46:07

在調用此方法之前，光標被停用

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