130、 Android OkHttp完全解析(转载) 完全解析:http://blog.csdn.net/lmj623565791/article/details/47911083 从原理角度解析http文件上传 http://blog.csdn.net/lmj623565791/article/details/23781773 https://github.com/hongyangAndroid/okhttputils