http://www.cnblogs.com/devinzhang/archive/2012/01/19/2327597.html
http://blog.sina.com.cn/s/blog_5a48dd2d0100to18.html
Android读写文件基于Java的文件输入输出流 http://www.cnblogs.com/avenwu/archive/2012/01/19/2327590.html
android File保存数据 http://www.cnblogs.com/hbiao68/archive/2012/01/02/2309797.html