杂乱的一些学习网站

1.跨程序共享数据——Content Provider 之 ContentResolver基本用法 & 一个读取系统联系人的Demo

https://www.jianshu.com/p/8800cb924acb

2.ListView

https://www.jianshu.com/p/f217b0208462

3.LBS(Location Based Service)(基于位置的服务)

https://www.cnblogs.com/-Tiger/p/7457120.html

https://blog.csdn.net/wwwsyxcom/article/details/90706325

https://blog.csdn.net/m0_37590688/article/details/76072563

https://blog.csdn.net/qq_29575707/article/details/52786896

https://www.cnblogs.com/xiaochongc/p/11169895.html

https://blog.csdn.net/yimenglin/article/details/91417124

4.java基础---->Serializable的使用

https://www.cnblogs.com/huhx/p/serializable.html

5.Fragment基本使用

https://www.jianshu.com/p/a4c51309bc19