https://www.2cto.com/kf/201410/347839.html
http://blog.csdn.net/wanli_smile/article/details/7715030
http://www.cnblogs.com/lqminn/archive/2012/11/12/2766563.html
【Android】录音暂停和继续
原文：http://www.cnblogs.com/defineconst/p/7698613.html
