sqlite_helper
在原有的SQLiteOpenHelper基础上进行的封装,愈加方便使用,常用的增修改查方法无需在重新覆写,内文档说明如何使用,只需阅览一次终生获益。本资料共包括以下附件:(The encapsulation based on the original SQLiteOpenHelper is more convenient to use. The common methods of addition, repair, and query do not need to be rewritten again. The internal document explains how to use it, and you only need to read it once for life. This document includes the following annexes:)
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