Android中的进程(Process)和线程(Thread)和服务(Service)
http://blog.csdn.net/skygray/article/details/5697661
http://blog.csdn.net/andy_android/article/details/7517704
Android内存管理与服务内存占用
http://www.docin.com/p-400887628.html
内存耗用:VSS/RSS/PSS/USS
http://hi.baidu.com/donghaozheng/item/6133dcc5eeaf6bbb0c0a7bfa