断点下载

链接转载;
判断当前Service是否是重启的Servcie
http://blog.csdn.net/luyi325xyz/article/details/42342899
Android中Service+Notification断点续传下载
http://blog.csdn.net/linglongxin24/article/details/53874148
视频链接：
http://www.imooc.com/learn/363
转载链接原理分析:
http://blog.csdn.net/seu_calvin/article/details/537
http://hao3100590.iteye.com/blog/129590349776
Android 断点续传的原理剖析与实例讲解
http://www.jb51.net/article/93388.htm