在RxJava2中，subscribe()和subscribeWith()有什么区别？

Question

在Android中，RxJava2中的subscribe()和subscribeWith()有何区别？这两个函数都用于订阅Observable上的Observer。这两个函数之间的主要区别是什么？应该在哪里使用subscribe和subscribeWith？如有可能，请提供代码示例。

- ANUJ GUPTA

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你读过 https://github.com/ReactiveX/RxJava/wiki/What's-different-in-2.0 吗？ - Mark Rotteveel

是的，我已经阅读了文档，我理解它们引入了可释放资源的概念。我只想要一个简单易懂的解释。 - ANUJ GUPTA

它的字面意思是：“由于反应流规范，Publisher.subscribe 返回 void，并且该模式在 2.0 中不再起作用。为了解决这个问题，已经向每个基本反应类添加了 E subscribeWith(E subscriber) 方法，该方法返回其输入的订阅者/观察者。” 这完全回答了你的问题。你不理解其中哪一部分？ - Mark Rotteveel

Answer 1

Since 1.x Observable.subscribe(Subscriber) returned Subscription, users often added the Subscription to a CompositeSubscription for example:

CompositeSubscription composite = new CompositeSubscription();

composite.add(Observable.range(1, 5).subscribe(new TestSubscriber<Integer>()));

Due to the Reactive-Streams specification, Publisher.subscribe returns void and the pattern by itself no longer works in 2.0. To remedy this, the method E subscribeWith(E subscriber) has been added to each base reactive class which returns its input subscriber/observer as is. With the two examples before, the 2.x code can now look like this since ResourceSubscriber implements Disposable directly:

CompositeDisposable composite2 = new CompositeDisposable();

composite2.add(Flowable.range(1, 5).subscribeWith(subscriber));

Source: What's different in [RxJava] 2.0

- Nouman Ch

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基本上理解了，但是 ResourceSubscriber 突然出现没有解释是怎么回事？你的意思是在你的例子中，.subscribeWith(subscriber) 中的 subscriber 必须是一个 ResourceSubscriber 吗？ - Robert Lewis