有人可以告诉我这个`StaleDataException`吗
问题描述：
有人可以向我解释这个 StaleDataException
Can someone explain to me this StaleDataException
07-11 19:58:23.298 E/AndroidRuntime( 1044): Uncaught handler: thread main exiting due to uncaught exception
07-11 19:58:23.368 E/AndroidRuntime( 1044): android.database.StaleDataException: Access closed cursor
07-11 19:58:23.368 E/AndroidRuntime( 1044): at android.database.AbstractWindowedCursor.checkPosition(AbstractWindowedCursor.java:217)
07-11 19:58:23.368 E/AndroidRuntime( 1044): at android.database.AbstractWindowedCursor.getInt(AbstractWindowedCursor.java:84)
07-11 19:58:23.368 E/AndroidRuntime( 1044): at android.database.CursorWrapper.getInt(CursorWrapper.java:128)
我们何时以及如何需要确保对游标的查询，以及为什么这样做失败
When and how do we need to assure a requiry on the cursor, and why fails with this Exception?
答
您正试图从光标检索信息，已经关闭了。您必须使用 isClosed 方法。
You are trying to retrieve information from a Cursor that has already been closed. You must verify whether the cursor is closed or not by using the isClosed method.