Android获取Root权限
http://jingyan.baidu.com/article/870c6fc3d5afa1b03fe4bea4.html
android superuser.apk 管理root权限原理分析
http://blog.csdn.net/dairyman000/article/details/8072029
how to get root access and execute commands in your Android application ?
http://hi.baidu.com/justtmiss/item/c629f7c6ff628367f6c95d1a
android手机root后的安全问题