单个网络的多个订阅请求翻新和RXJava？

Question

I am new to RxJava and Retrofit. Lets say I have Retrofit service which return Observable as

Observable <User> login(String userName, String password);

How can I subscribe to this Observable in multiple places.I want to subscribe it on multiple android activities.

For eg: Lets say I have a Landing page and Login Page Activity. Login page appears after Landing Page. When I make a network request on Login Page the result should be observed on both Login Page as well as Landing Page.

How can I acheive this?

Answer 1

You can do login(username,pw).cache() - cache() autoconnects to source observable and replays all emitted items to its subscribers. It works well for observables emitting single result, as retrofit does. The other option - replay() , whih returns ConnectableObservable , and subscribes to source only when ConnectableObservable.connect() is called. It has many useful overloads ( replay(bufferSize) , replay(time, TimeUnit) , etc), which allow one to control how many items are cached.