java.lang.IllegalStateException: Couldn't read row 0, col 2 from CursorWindow.

java.lang.IllegalStateException: Couldn‘t read row 0, col 2 from CursorWindow.  Make sure the Cursor is initialized correctly before accessing data from it.

    提示说没有找到相应的关键字段，查看数据库的字段是否写对，此时是区分大小写的

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