Handler消息传递机制浅析

http://www.runoob.com/w3cnote/android-tutorial-handler-message.html

https://blog.csdn.net/lowprofile_coding/article/details/72496065

https://blog.csdn.net/lowprofile_coding/article/details/72580044

https://www.cnblogs.com/fuck1/p/5513412.html