这是我读到的关于dispose()
here的内容:
简而言之,当Disposable(由TestObserver实现)被释放时,Observer(也是TestObserver)将不再接收来自Observable的值。
这是我的代码:
private fun createObservableWithDisposable() {
Observable
.create { e: ObservableEmitter<String> ->
val worker = Schedulers.io().createWorker()
e.setDisposable(worker)
worker.schedule {
for (i in 1..5) {
if (i == 3) {
worker.dispose()
// https://medium.com/@vanniktech/rxjava-2-disposable-under-the-hood-f842d2373e64
// After calling dispose(), the subscriber no longer receives items passed in OnNext().
// But it doesn't work in my code
}
e.onNext("Event $i on thread ${Thread.currentThread().name}")
}
}
}
.subscribe(
{ s ->
Log.d(TAG, "createObservableWithDisposable onNext msg=$s")
},
{ e ->
Log.d(TAG, "createObservableWithDisposable", e)
},
{
Log.d(TAG, "createObservableWithDisposable onComplete")
}
)
}
这就是我在Logcat中看到的:
2019-02-25 08:10:53.414 12071-12101/ru.sample D/RxJavaSamples: createObservableWithDisposable onNext msg=Event 1 on thread RxCachedThreadScheduler-1
2019-02-25 08:10:53.414 12071-12101/ru.sample D/RxJavaSamples: createObservableWithDisposable onNext msg=Event 2 on thread RxCachedThreadScheduler-1
2019-02-25 08:10:53.414 12071-12101/ru.sample D/RxJavaSamples: createObservableWithDisposable onNext msg=Event 3 on thread RxCachedThreadScheduler-1
2019-02-25 08:10:53.414 12071-12101/ru.sample D/RxJavaSamples: createObservableWithDisposable onNext msg=Event 4 on thread RxCachedThreadScheduler-1
2019-02-25 08:10:53.414 12071-12101/ru.sample D/RxJavaSamples: createObservableWithDisposable onNext msg=Event 5 on thread RxCachedThreadScheduler-1
我预计只会看到前两种排放。即,我认为在调用dispose()
之后,onNext()
将不会被调用。
你处置了提供物品的工人,而不是订户。
要停止接收项目,请尝试
val compositeDisposable = CompositeDisposable()
compositeDisposable.add(
Observable
.create { e: ObservableEmitter<String> ->
val worker = Schedulers.io().createWorker()
e.setDisposable(worker)
worker.schedule {
for (i in 1..5) {
if (i == 3) {
compositeDisposable.dispose() //changed here
}
e.onNext("Event $i on thread ${Thread.currentThread().name}")
}
}
}
.subscribe(
{ s ->
Log.d(TAG, "createObservableWithDisposable onNext msg=$s")
},
{ e ->
Log.d(TAG, "createObservableWithDisposable", e)
},
{
Log.d(TAG, "createObservableWithDisposable onComplete")
}
)
)