[英]RxAndroid : How to emit zipped observable every minute?
Observable<List<Stop>> zippedObservable = Observable.zip(observableList, objects -> {
List<Stop> stopList = Collections.emptyList();
for (Object obj : objects) {
stopList.add((Stop) obj);
}
return stopList;
});
I have the zippedObservable variable which was zipped by multiple observables.我有被多个 observable 压缩的 zippedObservable 变量。
disposable.add(zippedObservable.observeOn(AndroidSchedulers.mainThread())
.subscribeWith(new DisposableObserver<List<Stop>>() {
// onNext, onComplete, onError omitted
}));
This function emits the items (zipped stop list) successfully, but I'd like to emit these items every minute.此函数成功发出项目(压缩停止列表),但我想每分钟发出这些项目。 I assumed that
interval
operator would be perfect for this case, but I couldn't figure out how to mix both zip
and interval
functionalities.我认为
interval
运算符非常适合这种情况,但我无法弄清楚如何混合zip
和interval
功能。
This is what I tried这是我试过的
zippedObservale.interval() // cannot call interval operator here.
Observable.zip(...).interval() // cannot call interval operator here too.
I am looking for someone to explain how to mix these two operators so that I can emit the items every minute.我正在找人来解释如何混合这两个运算符,以便我可以每分钟发出这些项目。 Thank you.
谢谢你。
interval
is a static method that creates an Observable<Long>
that emits a Long
at a given period or interval. interval
是一个静态方法,它创建一个Observable<Long>
,它在给定的时间或间隔发出一个Long
。
To achieve what you describe, you need to use one such Observable
to pace your zipped Observable
:为了实现你所描述的,你需要使用一个这样的
Observable
来调整你的压缩Observable
:
Observable<List<Stop>> zipped = ...;
Observable<Long> interval = Observable.interval(...);
Observable<List<Stop>> everyMinute = zipped.sample(interval);
In that case, it will simply emit at most one result of zipped
every minute, dis-regarding whatever else zipped
is emitting.在这种情况下,它最多只会每分钟发出一个
zipped
结果,而不管其他zipped
。 I'm not sure that's what you want.我不确定那是你想要的。
If you want to simply re-emit the same value over and over, you might want to add a repeat()
in between.如果您只想一遍又一遍地重新发送相同的值,您可能需要在两者之间添加一个
repeat()
。
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