自己的第一个Android开发项目源代码，用于实现单词的记忆和管理，基本理念是将需要记忆的单词库通过首次预览自定义分为五个记忆等级分类记忆学习。-His first Android development project source code, for the memory of the word and management, the basic idea is that you need to memorize the word library is divided into five l