关于handler的一些文章http://stackoverflow.com/questions/4838207/how-to-create-a-looper-thread-then-
关于handler的一些文章
http://stackoverflow.com/questions/4838207/how-to-create-a-looper-thread-then-send-it-a-message-immediately
http://www.iteye.com/topic/1118130
http://www.iteye.com/topic/1123141