Anyone know how to get over this issue https://kotlinlang.slack.com/archives/C3PQML5NU/p1678411533344589?thread_ts=1678405022.785259&cid=C3PQML5NU

Hi, a newbie KMM here I saw a different Coroutine dependency

coroutines-core-native-mt

for KMM project, is it correct that this one makes Coroutine works on IOS as Android? do still I need it in the newest version or the

coroutines-core

enough?

Hi all… Does anyone have an example of a multiplatform JVM & Javascript project that uses the W3C DOM API? I’m not sure how to define the

expect

declarations because the DOM API is mapped to interfaces in the JVM platform and classes in the Javascript platform. The DOM objects are provided by factories in both platforms, so my code only needs to use the DOM objects, not instantiate the classes nor implement the interfaces. What should the expect declaration be?

I noticed that Napier logging library log/print the one line twice, is anyone faced the same problem or I'm missing something?

hey guys, I’m a newb in KMM, but keep finding this issue that when I try to run the iOs project (just a template project) from AS i get an error

This message was deleted.

Hello, I have a question. Why KMM doesn't have IOS emulator in Windows? And will KMM have IOS emulator in Windows OS in the future?

I started using Cocoapods and app builds and works fine. However Im trying to use bamboo for running UI test cases on my existing iOS application. Only during CI runs , shared cannot be created. Any ideas on how we can fix this?

Hello! I’m developing a Mobile SDK using KMM and I would like to confirm how “dangerous” is it to use

GlobalScope.async

? Or is there an alternative way to do a

DispatchQueue.global().async

on KMM? My problem is, KMM doesn’t have a close-to-native way of Scheduling tasks without freezing the Suspend function. So I had to create a class that’s “invalidatable”, similar to that of the Timer in Swift.

import kotlinx.coroutines.GlobalScope
import kotlinx.coroutines.async
import kotlinx.coroutines.delay

class AsyncSchedulerCaller(
    delayTime: Long,
    suspendFunction: suspend () -> Unit
) {
    init {
        GlobalScope.async {
            delay(delayTime)
            if (invalidated) {
                println("Invalidated.")
            } else {
                isRunning = true
                suspendFunction()
                isRunning = false
            }
        }
    }
    var invalidated = false
    var isRunning = false

    fun invalidate() {
        invalidated = true
    }
}

The way I use this is I store it in an optional variable and invalidate if it exists and create a new one, e.g.

class SomeClass { 
    var scheduler: AsyncSchedulerCaller? = null 

    suspend fun someSuspendFunction() { 
        runSomeApiCallHere() 

        scheduler?.invalidate() // this will make sure that the existing scheduled task will not be run
        scheduler = AsyncSchedulerCaller( 
            delayTime = 500, // will run after 500 milliseconds
            suspendFunction = {
                runSomeOtherApiCallHere() 
            }
        )
    }
}

To be honest, it already runs properly in iOS, and the scheduled task seem to run in the background. But I want to understand why it does, else, I might encounter bugs and I wouldn’t know how to fix. That said, it works in iOS, but I haven’t tested in Android. Would this kind of code be dangerous on the app’s lifecycle in Android? Thanks for the answers.

I may be barking up the wrong tree here, but I'm trying to create/destroy coroutine scopes when my viewmodels are instantiated/destroyed. I know

Finalize

wasn't the greatest solution when it came to Java's GC, but with KMM supporting more than just Android, is there a better way to destroy a coroutine scope along with its viewmodel?

Tell me, did anyone solve the problem of using llvm obfucator in a place with KMM? I'm only interested in the android platform. I usually use

<https://github.com/darvincisec/o-llvm-binary>

, but perhaps there is something else for KMM ? Any information would be helpful

Does kotlin emit different bytecode for both android and desktop? Assuming both compile for the same source and same target, and both compile the exact same class

I have a

LoginManager

that managers users logging into my app and downloading their data from database, and should be created/destroyed when the user logs in/out. Is there a common design pattern/implementation for this sort of dependency?

I am getting error below while trying to run a unit test in androiTest of KMM module. Any idea on how should I go about fixing it?

Task 'testDebugUnitTest' not found in project

Hello. I am really, really unsure on how to access the badoo.reaktive

Single

from my native Android app . I have the following:

fun getAssignedBooks(): SingleWrapper<List<String>> {
    return singleFromCoroutine {
        callAssignedBooks()
    }
        .subscribeOn(ioScheduler)
        .observeOn(mainScheduler)
        .wrap()
}

But when I try to do this:

val assignedBooks = SharedBookRepository().getAssignedBooks()
assignedBooks.subscribe()

I get this:

Cannot access 'com.badoo.reaktive.base.Source' which is a supertype of 'com.badoo.reaktive.single.SingleWrapper'. Check your module classpath for missing or conflicting dependencies

Cannot access 'com.badoo.reaktive.single.Single' which is a supertype of 'com.badoo.reaktive.single.SingleWrapper'. Check your module classpath for missing or conflicting dependencies

Any ideas why ? 😞 I'm using RxJava2 in my native Android app, I'd also like to chain the

getAssignedBooks()

with other observables and singles using

.flatMap()

and such, but not sure how I can do that. And it's been stressing me out for the past hour+

Hey I am not able to use String.format in Shared module that is powered by KMM. Does anyone has any clue?

So this is more of a general practice question: A music application I'm working on requires the use of a user token for verification with a third-party service. Obviously it's best to encrypt this in local storage, but I'm struggling to think of implementations with shared key storage in the context of symmetric encryption. In Android, Keystore functions allow you to store the shared key (more) securely. Outside of that, the only way to access them in an application's data folder is via a process with root privileges, which can't commonly be created on a user's end. In Linux, I believe you can use the Secret Service API via D-Bus' libsecret if you're compiling to Kotlin/JS? That supports KDE and GNOME, I don't know if it supports other environments, like XFCE/LXQT/etc. I'm not experienced with Apple products at all, so I can't give any thoughts on that front. In Windows, I'm sure there's some old implementation that corrupts itself every 30 minutes, but I can't think of one. Regardless of all that, KeePass seems to be the only cross-platform example available for storing keys, and I'm finding it hard to visualise a universal approach to storing a key. I guess I could use a key derivation function, and ask the user for a password on each login, but that seems excessive for what the application is. Does anyone have any thoughts?

I’m using the new Experimental DSL to produce an XCFramework for iOS. My setup is pretty basic (a single module), and it seems to work (I can see the output xcframework in my build folder when I run the

assembleMyLibXCFramework

task. So far so good. Here’s how I have it configured:

kotlinArtifacts {
    Native.XCFramework("MyLib") {
        targets(iosX64, iosArm64, iosSimulatorArm64)
        modes(NativeBuildType.DEBUG, NativeBuildType.RELEASE)

        linkerOptions = linkerOptions + listOf("-lsqlite3")
    }
}

Sooo … Now I want to publish the xcframework via cocoapods (eventually SPM as well, but one thing at a time…). I don’t see how the new DSL to produce the framework works with the existing

cocoapods

DSL provided by the

native.cocoapods

plugin? Or maybe they don’t work together at all? Can I publish an XCFramework generated with the Experimental DSL using cocoapods? How so?

I am new to kotlin, multiplatform, and I'm trying to debug a slightly modified version of the doodle contact tutorial: https://github.com/nacular/doodle-tutorials/tree/master/Contacts I generate source maps, and step through my own commonMain and jsMain source in the debugger, but I cannot "load content" from anything in

<webpack://doodle-contacts/compileSync/*>

Chrome/Debug Error:

Could not load content for

<webpack://doodle-contacts/compileSync/js/main/productionExecutable/kotlin/jsMainSources/libraries/stdlib/js/src/kotlin/collections/HashSet.kt?fb14>

Fetch through target failed: Unsupported URL scheme; Fallback: HTTP error: status code 404, net::ERR_UNKNOWN_URL_SCHEME)

I would like to be able to step through kotlin library code, just like I do with JDK library code. I think I should be able to look at and step through any kotlin src in commonMain. But am I trying to do something that cannot be done? Here is my "most recent"

js(IR) {
        browser {
            compilations.all {
                kotlinOptions {
                    metaInfo = true
                    sourceMap = true
                    sourceMapEmbedSources = "always"
                    verbose = true
                }
            }
            commonWebpackConfig {
                devServer?.`open` = false
                devServer?.`port` = 9090
                mode = DEVELOPMENT
                devtool = EVAL_SOURCE_MAP
                sourceMaps = true
                showProgress = true
            }
        }
        binaries.executable()
    }
}

I added a screen-shot of my debugger in the thread.

I'm benchmarking my lib with

kotlinx-benchmark-runtime:0.4.3

and I'd like the

jvmBench

sources to extend the

jvmMain

, in order to avoid things as re-declaration of expected classes and so on In the readme, they simply write (in Groovy script)

Propagate dependencies and output from

main

sourceSet.

```dependencies {

benchmarksCompile sourceSets.main.output + sourceSets.main.runtimeClasspath

}```

how can I translate that to Kotlin DSL? Looking around at other examples, I tried the following, but without success:

kotlin {
    targets {
        jvm {
            compilations {
                val main by getting
                val bench by creating {
                    defaultSourceSet {
                        dependencies {
                            implementation(main.compileDependencyFiles + main.output.classesDirs)
                        }
                    }
                }
            }
        }
    }
}

Hello. What could be causing duplicated files in the commonMain when implementing SqlDelight 1.5.4 in a KMM-library? It was working previously, but after updating multiplatform dependency to 1.8.10 and other dependencies like Ktor and serialization this started happening.

Hello! Is out there any example to how to configure a KMM in a "convenient plugin"? I don't want to repeat the code inside the

build.gradle.kts

in all the modules for that reason I want to move all that to a gradle plugin. My problem is how to translate

val androidMain by getting

.

Can any one have sample project which have below things. 1. Ktor with Mvvm Integration 2. Sqdelight for both Android and IOS. 3. Ktor(Api Success and Failure Cases) using Jetpack Compose

Any alpha ktor client version out there with okhttp 5.0.0 engine? (for fastFallback support)

Hello 👋, I have a question regarding

io.ktor.client.HttpClient

. I am using it in a Kotlin Multiplatform project. For this, I followed the tutorial provided here: https://ktor.io/docs/getting-started-ktor-client-multiplatform-mobile.html. From what I see there, for the

HttpClient

I don't need to call

.close()

? Because the Ktor docs here https://ktor.io/docs/create-client.html#close-client describe that close needs to be used to free up the resources. However if I am calling

.close()

on my instance of

HttpClient

and after that, I am trying a 2nd request with it, I got a crash. I tried that by calling my request function from my iOS client and I run in sth like this:

kotlinx.coroutines.JobCancellationException: Parent job is Completed; job=SupervisorJobImpl{Completed}@e50024f0

. I am using one single instance in my Multiplatform module for the

HttpClient

like suggested in the Ktor docs:

Note that creating

HttpClient

is not a cheap operation, and it's better to reuse its instance in the case of multiple requests.

So there is no new instance created for each request. Is that usage correct? Can you please give me here an advice?

Hi 👋, checkout my latest KMP project using Compose multiplatform for Android, IOS and Desktop (Web Soon)! 99% of the code is shared! (UI, Navigation, Business logic, Networking, Caching, DI...) https://github.com/M0Coding/Pokedex

If I have a multiplatform library with multiple Java source sets, how can I choose which source set I use when I import the library?

Hello! Tell me, what top open source applications did you come across? Not demos on two pages, but full-fledged applications. Maybe there is "kotlin multiplatform applications awesome", I know this only from libs.

Hey everyone, after creating a new multiplatform module in an existing android application from the wizard using Cocoapods dependency, the project gives an error on Gradle Sync saying "Val cannot be reassigned" for version of cocoapods. I went to the CocoapodsExtension.kt file where version is defined as a var of String type and not as val. Does anyone know how to resolve this issue? Thanks.