RxJava - ConnectableObservable, disconnecting and reconnecting

问题

I am trying to replicate sample code from the "Disconnecting" section here.

Disconnecting

As we saw in connect's signature, this method returns a Subscription, just like Observable.subscribe does. You can use that reference to terminate the ConnectableObservable's subscription. That will stop events from being propagated to observers but it will not unsubscribe them from the ConnectableObservable. If you call connect again, the ConnectableObservable will start a new subscription and the old observers will begin receiving values again.

ConnectableObservable<Long> connectable = Observable.interval(200, TimeUnit.MILLISECONDS).publish();
Subscription s = connectable.connect();

connectable.subscribe(i -> System.out.println(i));

Thread.sleep(1000);
System.out.println("Closing connection");
s.unsubscribe();

Thread.sleep(1000);
System.out.println("Reconnecting");
s = connectable.connect();

Output

0
1
2
3
4
Closing connection
Reconnecting
0
1
2
...

---

Using RxJava 2.0.8, I have:

    ConnectableObservable<Long> connectable = Observable.interval(200, TimeUnit.MILLISECONDS).publish();
    Disposable s = connectable.connect();

    connectable.subscribe(new Observer<Long>() {
        @Override
        public void onSubscribe(Disposable d) {

        }

        @Override
        public void onNext(Long aLong) {
            Log.d("test", "Num: " + aLong);
        }

        @Override
        public void onError(Throwable e) {

        }

        @Override
        public void onComplete() {

        }
    });

    try {
        Thread.sleep(1000);
    } catch (InterruptedException e) {
        e.printStackTrace();
    }
    Log.d("test", "Closing connection");
    s.dispose();

    try {
        Thread.sleep(1000);
    } catch (InterruptedException e) {
        e.printStackTrace();
    }
    Log.d("test", "Reconnecting...");
    connectable.connect();

Output

Num: 0
Num: 1
Num: 2
Num: 3
Num: 4
Closing connection
Reconnecting...

Thanks in advance....

回答1:

It seems this behaviour has not been adopted by RxJava. The working example is from Rx.NET. See https://github.com/ReactiveX/RxJava/issues/4771

来源：https://stackoverflow.com/questions/43424964/rxjava-connectableobservable-disconnecting-and-reconnecting