RxJava是一种基于观察者模式的响应式编程框架
ReactiveX
An API for asynchronous programming with observable streams.
A combination of the best ideas from the Observer pattern, the Iterator pattern, and functional programming.
ref
https://www.jianshu.com/p/0cd258eecf60
http://www.importnew.com/23325.html
原文：https://www.cnblogs.com/huilei/p/10063174.html