Rx - How to unsubscribe automatically after receiving onNext()?

问题

How to unsubscribe automatically after receiving onNext() ?

For now I use this code:

rxObservable
.compose(bindToLifecycle()) // unsubscribe automatically in onPause() if method was called in onResume()
.subscribe(new Subscriber<Object>() {
     ...
     @Override
     public void onNext(Object o) {
         unsubscribe();
     }
 });

回答1:

I you want to "unsubscribe" just after the first event, the operator take is a way to go.

 rxObservable.compose(bindToLifecycle())
             .take(1)
             .subscribe();

回答2:

I think this is what you need:

 rxObservable.compose(bindToLifecycle())
             .takeFirst(lifecycleEvent -> lifecycleEvent == LifecycleEvent.PAUSE);

来源：https://stackoverflow.com/questions/38900610/rx-how-to-unsubscribe-automatically-after-receiving-onnext