Android读写文件

http://blog.youkuaiyun.com/mad1989/article/details/37568667

http://www.2cto.com/kf/201410/341887.html

http://blog.youkuaiyun.com/chenzheng_java/article/details/6214261

http://blog.youkuaiyun.com/ztp800201/article/details/7322110