RxJava Return single, execute completable after

Question

I\'m trying to accomplish the following: Return some data as single, execute a completable after. The following code does not compile due to single.andThen(). The actions need t

Answer 1

Note that if you don't care whether the result is Single or Completable there is a special flatMapCompletable operator in RxJava2 to execute completable after Single:

single.flatMapCompletable(result -> completable);

Answer 2

Use flatMap:

single.flatMap(v -> completable.andThen(Single.just(v)))

Answer 3

Assuming you actually want to return the Single after the Completable, here's another way:

Using Java:

single.flatMap(x -> completable.toSingleDefault(x))

Using Kotlin:

single.flatMap { completable.toSingleDefault(it) }

Answer 4

If anyone is interested in a the RxSwift solution:

saveObjectsA().flatMap { (objectsA: [A]) -> Single<Bool> in
        B.objects = objectsA
        return completable.andThen(Single.just(true))
    }

saveObjectsA returns a Single<[A]> which is an attribute of B (created previously). I needed to save it before saving B.