column '_id' does not exist
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错误提示如下:
java.lang.IllegalArgumentException: column '_id' does not exist
因为SimpleCursorAdapter的方法只识别_id,所以,当你用到sqlite的SimpleCursorAdapter时,必须把数据表的主键命名为_id。另外在new SimpleCursorAdapter时里面的用到的Cursor , 如果是通过sqlitedatabase.query()方法获得,那么在query方法中参数String[] columns必须包含'_id'主键!
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