Observable which does not pass anything in onNext()

Question

I would need an Observable, for example to provide a system clock, which does not need to pass anything in onNext(). I couldn\'t find a signature that would allow me to do that.

Answer 1

If you need something to be passed to onNext() before onCompleted() is called:

Observable.just(null)

If you only need onCompleted() to be called:

Observable.empty()