如何在RxJava2中链接两个Completable [英] How to chain two Completable in RxJava2

问题描述

我有两个可完成的。我想做以下场景：
如果第一个Completable到达onComplete，继续第二个Completable。最终结果将是第二个可完成的完成。

I have two Completable. I would like to do following scenario: If first Completable gets to onComplete , continue with second Completable. The final results would be onComplete of second Completable.

当我有单个 getUserIdAlreadySavedInDevice（）和Completable 时，我就是这样做的login（）：

This is how I do it when I have Single getUserIdAlreadySavedInDevice() and Completable login():

@Override
public Completable loginUserThatIsAlreadySavedInDevice(String password) {
    return getUserIdAlreadySavedInDevice()
            .flatMapCompletable(s -> login(password, s))

}

推荐答案

您正在寻找然后运营商。

返回首先运行此Completable然后另一个可完成的Completable。

Returns a Completable that first runs this Completable and then the other completable.

firstCompletable
    .andThen(secondCompletable)

一般来说，此运算符是 flattable 的替换可完成：

In general, this operator is a "replacement" for a flatMap on Completable:

Completable       andThen(CompletableSource next)
<T> Maybe<T>      andThen(MaybeSource<T> next)
<T> Observable<T> andThen(ObservableSource<T> next)
<T> Flowable<T>   andThen(Publisher<T> next)
<T> Single<T>     andThen(SingleSource<T> next)

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