Handling lists with RxJava and Retrofit in android

Question

I have couple of api calls to make (sequentially, asynchronously) and some of them returns lists. My api interface is given below.

@GET(\"/users/settings\")
Obse         


        

Answer 1

RxJava has added flatMapIterable. So you don't need flattenList now. E.g.,

  Observable<UserWrapper> o =
       getUserSettings()
       .doOnNext(this::saveUser)
       .flatMap(user -> getItems(user.getUserName())
                        .flatMapIterable(items -> items)
                        .flatMap(item -> getItemInfo(item.getId()))
                        .doOnNext(this::saveItem)
                        .toList()
                        .map(ignored -> user))
        .flatMap(user -> getFriends(user.getUserName())
                         .flatMapIterable(friends -> friends)
                         .doOnNext(this::saveFriend)
                         .toList()
                         .map(ignored -> user)
        );
    o.subscribe(...);