http://www.cnblogs.com/fengzhblog/archive/2013/08/01/3231500.html
http://blog.csdn.net/fan7983377/article/details/51750583
http://www.cnblogs.com/Amandaliu/archive/2013/02/04/2891604.html
【Android】录音
原文：http://www.cnblogs.com/defineconst/p/7699517.html
