问题
Why do we need to use RxAndroid with RxJava? What is the functional difference between them and actual use of RxAndroid and RxJava? I can't find proper answer for this.
回答1:
RxAndroid can be understood as an extension to RxJava, that helps you to use it on Android platform easily. See the description on RxAndroid Github repository:
Android specific bindings for RxJava 2.
This module adds the minimum classes to RxJava that make writing reactive components in Android applications easy and hassle-free. More specifically, it provides a Scheduler that schedules on the main thread or any given Looper.
Note that when you're using RxAndroid, you should also use the latest RxJava version as a dependency:
Because RxAndroid releases are few and far between, it is recommended you also explicitly depend on RxJava's latest version for bug fixes and new features.
回答2:
RxAndroid does not replace rxjava. It is a small library of Android specific rxjava utilities. For example it makes the Android application main thread available as an rxjava scheduler.
来源：https://stackoverflow.com/questions/49651249/difference-between-rxjava-and-rxandroid