是否建议在订阅完成工作后立即调用Disposable.dispose()? [英] Is it recommended to call Disposable.dispose() as soon as a subscription completes work?

问题描述

我有一个 Activity ，在其中创建并订阅 Single 类的多个实例(每个实例在单独的后台线程中进行一些工作).对于每个订阅，我将创建的 Disposable 实例添加到范围为 Activity 的 CompositeDisposable 实例中.当 Activity 被销毁时，我正在调用 CompositeDisposable.clear()方法来处置 Activity 中的所有订阅.当然，这意味着所有 Disposable 实例(包括那些已完成工作的订阅实例)都在我的 Activity 中徘徊，直到 Activity 被销毁为止.

I have an Activity in which I'm creating and subscribing to multiple instances of the Single class (each doing some work in a separate background thread). For each subscription, I'm adding the Disposable instance that's created to a CompositeDisposable instance that is scoped to the Activity. When the Activity is destroyed I am calling the CompositeDisposable.clear() method to dispose of all subscriptions in the Activity. This of course means that all Disposable instances (including those for subscriptions that have completed work) hang around in my Activity until the Activity is destroyed.

这还好吗，还是每当特定的 Single 实例完成工作时(即当 SingleObserver时)，我应该为每个单独的订阅调用 Disposable.dispose()接收到 onSuccess 或 onError 回调)?后一种方法的问题在于，我必须跟踪哪个 Disposable 与哪个 SingleObserver 相关联(这与使用 CompositeDisposable 的观点不符).每次 Single 实例完成工作时，是否有更好的方法来处理订阅?

Is this okay or should I be calling Disposable.dispose() for each individual subscription every time the particular Single instance completes work (i.e. when the SingleObserver receives the onSuccess or onError callback)? The problem with the latter approach is that I have to keep track of which Disposable is associated to which SingleObserver (which defeats the point of using CompositeDisposable). Is there a better approach for disposing of a subscription every time a Single instance completes work?

推荐答案

不，您不应该. Observable 完成后， Observable 会自行处理..
这是可观察的合同的一部分:

No, you shouldn't.When an Observable is completed, Observable is disposed of by itself.
This is part of the Observable contract:

当Observable向其观察者发出OnError或OnComplete通知时，这将终止订阅.观察者不需要发出取消订阅"通知来终止以这种方式由观察者"终止的订阅.

When an Observable issues an OnError or OnComplete notification to its observers, this ends the subscription. Observers do not need to issue an Unsubscribe notification to end the subscriptions that are ended by the Observable in this way.

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