v4l2视频采集

Android的传感器系统，精选android项目书籍，很好有参考资料。(The sensor system Android, select Android project books, very good reference material.)

关于AccessibilityService 先看看官网的介绍Accessibility Many Android users have different abilities that require them to interact with their Android devices in different ways. These include users who have visual, physical or age-related limitations that prevent them from fully seeing or using a touchscreen, and users with hearing loss who may not be able to perceive audible information and alerts... Android官网详解accessibility 上面大概的意思就是Accessibility是一个辅助服务，主要是面向一些使用Android手机的用户有相关障碍(年龄、视觉、听力、身体等)，这个功能可以更容

简单的联系人程序 包含sqlite数据库。可拨号，添加头像获取最近拨号读取系统数据库安装需要给予系统权限，最好是root一下。sqlite数据库在此应用的非常完善

ocr光字符识别

此JAVA文件内容为android系统上可以使用查看PDF文件格式的软件源代码(The contents of the JAVA file is used to view the PDF file format of the software source code to Android system)

Android的传感器系统，精选android项目书籍，很好有参考资料。(The sensor system Android, select Android project books, very good reference material.)

这是一个很经典的关于电子琴的作业，是学习安卓的一个很好的例程，使我们上课的时候老师让我们做的，可以运行的。(This is a classic on the keyboard operation, Andrews is a good learning routines, so that our class when the teacher asked us to do, you can run.)

时时获取android 手机陀螺仪数据 ，并保存数据。

二维码扫描，能直接运行，稍微修改就可运用到自己项目！