RxJava 란?

A library for composing asynchronous and event-based programs using observable sequences for the Java VM

참조

http://functionalthinking.appspot.com/RxJava#h_615cd870abe2e5c5dba13bbfb7964558

http://jongwook.tistory.com/760

http://mttkay.github.io/blog/2013/08/25/functional-reactive-programming-on-android-with-rxjava/

http://open.blogs.nytimes.com/2014/08/18/getting-groovy-with-reactive-android/?_php=true&_type=blogs&_php=true&_type=blogs&_r=2