android – 停止Observable.interval并发送onComplete

[weixin_38048397]

我有以下几种情况：我希望有一个计时器计数,直到我取消订阅但我希望在我停止使用最后一个值时得到onComplete信号. observable = Observable.interval(1, TimeUnit.SECONDS) .observeOn(AndroidSchedulers.mainThread()) .doOnNext(new Action1<Long>() { @Override public void call(Long aLong) { String duration = Utils.getDuration(startedTrackingTime, new Date().getTime()); view.updateDurationTextView(duration); } }); subscription = observable.subscribe(); public void stopMission() { observable.doOnCompleted(new Action0() { @Override public void call() { Log.d(TAG, "onCompleted: " + "timer"); } }); subscription.unsubscribe(); doOnComplete从未调用过.可以用RxJava做到吗？我觉得我做错了什么？

[weixin_38062043]

@MatBos是正确的,如果你取消订阅,你不能指望完成排放.但是,如果要提前停止observable并使其完成,则可以将间隔与PublishSubject合并,并在需要时通过主题发送停止消息： PublishSubject<Long> subject = PublishSubject.create(); subject .mergeWith(Observable.interval(1, TimeUnit.SECONDS)) .takeWhile(n -> n != -1) .doOnNext(System.out::println) .doOnCompleted(() -> System.out.println("completed")) .subscribe(); Thread.sleep(3100); subject.onNext(-1L); Thread.sleep(2000); 得到： 0 1 2 completed