http://blog.csdn.net/yegongheng/article/details/40624267
http://hyshucom.iteye.com/blog/1681273
http://blog.csdn.net/shimiso/article/details/43447785
录音功能暂停的实现思路
原文：http://www.cnblogs.com/epmouse/p/6212022.html
