Android开发之InstanceState详解
http://www.cnblogs.com/hanyonglu/archive/2012/03/28/2420515.html
Android笔记 Application对象的使用-数据传递以及内存泄漏问题
http://www.cnblogs.com/chon/archive/2011/07/11/2102894.html
http://www.cnblogs.com/hanyonglu/archive/2012/03/28/2420515.html
http://www.cnblogs.com/chon/archive/2011/07/11/2102894.html