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Questions tagged [kotlinx.coroutines]

Library support for Kotlin coroutines in Kotlin/JVM and Kotlin/JS

296 questions
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Compilation error: "-Xcoroutines has no effect: coroutines are enabled anyway in 1.3 and beyond"

When I try to compile my Android app written in Kotlin, I get the following compilation error, and my build fails: w: -Xcoroutines has no effect: coroutines are enabled anyway in 1.3 and beyond How can I fix this?
grooveplex
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Migrate to Kotlin coroutines in Android with Kotlin 1.3

What should I change in my build.gradle file or import in classes to use stable coroutine functions in my Android project with Kotlin 1.3 ? Fragment about coroutines in my build.gradle implementation…
Patryk Kubiak
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Kotlin coroutines handle error and implementation

Using coroutines for the first time. Need help. Here is my flow: Presenter wants to login so calls Repository Interface. Repository implements RepositoryInterface. So Repository calls APIInterface. APIInterface is implemented by APIInterfaceImpl.…
Alessandra Maria
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Is NetworkOnMainThreadException valid for a network call in a coroutine?

I'm putting together a simple demo app in Kotlin for Android that retrieves the title of a webpage with Jsoup. I'm conducting the network call using Dispatchers.Main as context. My understanding of coroutines is that if I call launch on the…
Dan 0
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Mocked suspend function returns null in Mockito

I have a suspending functions that I have mocked, using Mockito but it is returning null both projects use 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.0.0' Example 1 here is my test in which the mock is returning null @Test fun `when gps not…
Mark Gilchrist
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Integrate Kotlinx coroutines in intelliJ project

I‘m using intellij for a while now. There I work on a javaFx project, which is mainly written in java but I discovered Kotlin to be a nice alternative. Recently I read about coroutines in Kotlin and I just can‘t figure out how to add the Kotlinx…
Punika
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kotlin coroutine throws java.lang.IllegalStateException: Already resumed, but got value Location

I'm quite new to Kotlin coroutine and Android development in general. While playing around to understand how it worked, I faced an error I can't seem to solve. From a basic activity i try to connect to the googleApiClient. The permissions are ok. I…
Shinmen
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how to cap kotlin coroutines maximum concurrency

I've got a Sequence (from File.walkTopDown) and I need to run a long-running operation on each of them. I'd like to use Kotlin best practices / coroutines, but I either get no parallelism, or way too much parallelism and hit a "too many open files"…
Benjamin H
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Kotlin coroutines GlobalScope.launch vs runBlocking

Is there any difference between this two approaches? runBlocking { launch(coroutineDispatcher) { // job } } GlobalScope.launch(coroutineDispatcher) { // job }
silent-box
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can I always use WorkManager instead of coroutines?

I wonder why should I bother with rx or coroutines when there is brilliant solution as WorkManager. But for almost all tutorials they use coroutines so may be WorkManager has disadvantages ?
Nurseyit Tursunkulov
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Wait For Data Inside a Listener in a Coroutine

I have a coroutine I'd like to fire up at android startup during the splash page. I'd like to wait for the data to come back before I start the next activity. What is the best way to do this? Currently our android is using experimental coroutines…
JPM
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launch is only available since Kotlin 1.3 and cannot be used in Kotlin 1.2

I'm trying to run the simplest example with coroutines: import kotlinx.coroutines.* fun main() { GlobalScope.launch { delay(1000L) println("${Thread.currentThread().name}: World") } …
Ksenia
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In kotlin, how do I mock a suspend function that wraps a callback?

Let's say there's an interface with a callback: interface SomeInterface { fun doSomething(arg: String, callback: (Exception?, Long) -> Unit) } which I extend into a suspend function like this: suspend fun SomeInterface.doSomething(arg: String):…
Mircea Nistor
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Unresolved reference: async in Kotlin in 1.3

I have multi module kotlin gradle project in github here. One of my sub project introducing-coroutines with build file build.gradle.kts file is here The contents of build.gradle.kts is - import org.jetbrains.kotlin.gradle.dsl.Coroutines …
Rajkumar Natarajan
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How to ignore JobCancellationException?

Recently, I've upgraded Kotlin Coroutines from experimental to 1.1.1 and faced the problem that job.cancel() in new version works differently. Here's the code with Experimental Coroutines: fun > T.runAsync( job:…
Taras Parshenko
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