RxJava Return single, execute completable after

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) }

Use flatMap:

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