How to remove listener from task?

Question

I'm adding a listener to a task returned from a Firestore get() request:

myQuery.get().addOnSuccessListener(Runnable::run) 
    { 
       /*does something*/ 
    }

I know I can scope the listener to an activity with addOnSuccessListener(activity, ...) which would remove the listener when the activity stops. But, to keep my code clean I need to remove the listener myself (when the rxJava observable that wraps the request is disposed of - using

emitter.setCancellable{ 
/*remove the listener here*/ 
}

).

How can I remove the listener from the task?

Possible duplicate of [How to remove listener for DocumentSnapshot events (Google Cloud FireStore)](https://stackoverflow.com/questions/46642652/how-to-remove-listener-for-documentsnapshot-events-google-cloud-firestore) — Puni, Aug 24 '18 at 08:44
to remove a listener thats how it should be done see this https://firebase.google.com/docs/firestore/query-data/listen#detach_a_listener — Puni, Aug 24 '18 at 09:28
@Hatward no its not. Its for firestore. Both the mention links are for firestore. — Puni, Aug 24 '18 at 10:09
@puni yeah firestore realtime updates - look at the title lol — Hatward, Aug 24 '18 at 10:09
@TomGatward Did you manage to find any solution? I gotta say, as I learn more about Task API less and less flexible it looks. — Ankit, Dec 03 '19 at 06:05

score 2 · Answer 1 · answered Aug 24 '18 at 09:21

2

Instead of using a Task listener, try adding a snapshot listener on the Query itself.

This method returns a ListenerRegistration object that has a remove method.

answered Aug 24 '18 at 09:21

Bartek Lipinski

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I guess i could add a snapshot listener and call remove on the ListenerRegistration after the first update as well as when it needs disposing. That seems dirty though and i'm confused as to why the same can't be done for a simple get request. – Tom Gatward Aug 24 '18 at 11:25

How to remove listener from task?

1 Answers1