2018-06-03 Handler

Android中的Thread, Looper和Handler机制(附带HandlerThread与AsyncTask)
https://hit-alibaba.github.io/interview/Android/basic/Android-handler-thread-looper.html#android%E4%B8%AD%E7%9A%84thread-looper%E5%92%8Chandler%E6%9C%BA%E5%88%B6%E9%99%84%E5%B8%A6handlerthread%E4%B8%8Easynctask

Handler消息传递机制（子线程中传递new Handler和主线程中new Handle传递消息）
https://blog.csdn.net/ShareUs/article/details/50787890