Retrofit 2 + RxJava cancel/unsubscribe

Question

I am performing a network request where I send files and a message. I would like to have an option to cancel current request. I have found two similar questions and both suggests that observable.subscribe(Observer) returns Subscription object which has method unsubscribe().

Here is the first one

And the second one

In my case, I use observable.subscribe(Observer) which is void. Here is my code:

Observable<MessengerRaw> observable = mModel.sendMessage(message, companion, description, multiParts);
        observable.subscribe(new Observer<MessengerRaw>() {
            @Override
            public void onSubscribe(Disposable d) {

            }

            @Override
            public void onNext(MessengerRaw value) {
                if (getView() != null) {
                    ((MessengerActivity) getView()).resetMessegeView();
                    ((MessengerActivity) getView()).updateMessageList();
                }
            }

            @Override
            public void onError(Throwable e) {
                getData().remove(0);
                if (getView() != null) {
                    ((MessengerActivity) getView()).updateMessageList();
                }
            }

            @Override
            public void onComplete() {
                hideProgress();
            }
        });

So how do I unsubscribe/cancel my request? Thank you.

score 20 · Accepted Answer · answered Jun 16 '17 at 11:19

20

In RxJava2, you can get Disposable object in onSubscribe callback method of oserver, which you can use to dispose subscription.

answered Jun 16 '17 at 11:19

Arnav Rao

6,692
2
34
31

I will mark this answer as accepted because it directly points to the solution. The previously accepted answer was not edited properly. Cheers. – Sermilion Jun 16 '17 at 13:39

Gevork Safaryan · Answer 2 · 2017-06-15T19:24:34.547

5

In RXJava You must use subscriptions for unsubscribe

private Subscription mSubscription;

/.../

Observable<MessengerRaw> observable = mModel.sendMessage(message, companion, description, multiParts);
Subscription subscription = observable.subscribe(new Observer<MessengerRaw>() {/.../});

When you want to unsubscribe you can call

if(!subscription.isUnsubscribed()){
    subscription.unsubscribe();
}

In RXJava 2 observable.subscribe(new Observer<MessengerRaw>() {/.../}); returns Disposable object, you can call dispose();

edited Jun 15 '17 at 19:24

answered Jun 15 '17 at 18:58

Gevork Safaryan

237
1
7

1

observable.subscribe(new Observer() {/.../}); does not have overloaded version that returns Subscription. There are versions that return Disposable, Observable, and void. – Sermilion Jun 15 '17 at 19:02
You can call dispose(); – Gevork Safaryan Jun 15 '17 at 19:12
2

You are right: @Override public void onSubscribe(Disposable d) { } has the disposable on which I can call dispose() and request cancels. Thanks. You can include into your answer so others can see it right away. – Sermilion Jun 15 '17 at 19:19
Glad that helped. – Gevork Safaryan Jun 15 '17 at 19:24
In RxJava 2, there is no `Subscription.unsubscribe()` method, that belongs to RxJava 1. – Farid Nov 21 '19 at 03:52

Retrofit 2 + RxJava cancel/unsubscribe

2 Answers2