Rx - 如何在收到 onNext() 后自动退订？

Question

如何在收到onNext()后自动退订？

现在我使用这个代码：

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

Answer 1

我想"unsubscribe"刚过第一个事件，运算符take是个办法。

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

Answer 2

我想这就是你需要的：

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