Chain two retrofit observables w/ RxJava

Question

I want to execute 2 network calls one after another. Both network calls return Observable. Second call uses data from successful result of the first call, method in successf

Answer 1

In addition to Anthony R.'s answer, there is a flatMap overload which takes a Func2 and pairs your primary and flattened values for you. In addition, look at the onErrorXXX and onExceptionXXX operators for error manipulation, and chain them with your first and second Observables

first.onErrorReturn(1)
.flatMap(v -> service(v).onErrorReturn(2), (a, b) -> a + b);