Hey folks! I have what I think is a pretty common issue. I am building an app that will be connected to backend ktor servers from where it will get system data as well as create new data. The App will be fully operational offline. I'm planning to use either SQLDelight or Kodein DB to persist data on the device and when network is available it will send updates over the network to ktor servers storing state in a MongoDB. The issue is that you never know how long your app will be disconnected from the internet. Maybe you are going camping for the weekend. So it will need to persist the "RecordAdded"/Deleted/Updated events and send them when they are reconnected. Are there any libraries to do this? Some sort of polling solution that will attempt updates and only delete the local events when the update is successfully? Thanks in advance!

Anyone know of a multiplatform alternative to workmanager?

Kotlin Native: Why are 

implementation

 dependencies specified in submodules are exported when 

transitiveExport = true

? Shouldn’t it only export dependencies marked with 

api

?

Hello folks. I have the following expect function

expect fun String.formatPlatform(vararg args: Any?): String

and on iosMain module I wrote the actual function

actual fun String.formatPlatform(vararg args: Any?): String {
    return NSString.create(format = this, args = arrayOf(args)).toString()
}

But when I compile that code I get this error :

kotlin.Array<out kotlin.Any?>  is not supported here: doesn't correspond to any C type

I tried to change the parameter type from expect function to Float or Double, but the error continues:

kotlin.Array<out kotlin.Float?>  is not supported here: doesn't correspond to any C type

I read the issue https://github.com/JetBrains/kotlin-native/issues/1834 but I do not solve the problem. Can anyone help me with that? Thank you.

Is it expected that intellij lets me use APIs from android sdk from common code as well as my jvm-only module? They don’t compile but intellij tries to autocomplete them, and even show lint warnings that only apply to android projects.

following , how can I use 

bootRun

 gradle task? Its not visible in available tasks.

i have a

jvmMain

and an

androidMain

source folder in my shared module. It seems like l have to duplicate the actual class declaration in both jvmMain and androidMain as if I just have the jvm version the expected class says something like "there isnt an actual declaration for jvm" (referring to androidMain). If i delete my android source set and gradle declaration the shared library complains about a missing

AndroidManifest.xml

. So just wondering if it is normal that i would have to duplicate

androidMain

and

jvmMain

[SOLVED] I’m getting the error

error: no such module 'KotlinCommon'

while building for Bitrise tests. Tests run fine locally on simulator and device. I have a kotlin module in my iOS app, using the cocoapods plugin. Module seems to build fine with BUILD SUCCESSFUL Any ideas?

Hello Everyone, i completed My POC in KMM using Ktor, Realm and shared ViewModel, so now only UI need to take care in android and iOS. now i need to write the Unit Testing for Ktor, realm and shared viewmodel also, can anyone please share the blog or sample how we can write unit testing and do the mocking in kotlin multiplatform, Thanks to @John O'Reilly , i have done all these by learning from his blog's and sample code

Hi everyone! In KMM project using Ktor, when I want to pass an access token to the header of a request I get this exception:

io.ktor.client.features.ClientRequestException

.  This is my code:

httpClient.request("https://...") {
    method = <http://HttpMethod.Post|HttpMethod.Post>

    header("Authorization", "access token")
}

What’s wrong with this code?

[SOLVED] Hi ! I used to run my unit tests using a gradle configuration running through Android Studio but it does not show the test pane anymore. 😞 Do you know how to get it back ?

Android Studio 4.2.1 / KMM Plugin 0.2.6

Hello, is anyone able to use

AtomicReference

from the native library? I do not have access to a (getter and) setter. Would I have to implement my own AtomicReference into my project to make it work?

Hi guys! 🙂 Sorry in advance for the dumb question, kinda feel bad for asking it but I really couldn’t find the answer anywhere... We’re looking to start a new multiplatform project with my team and I’m already struggling with the basic setup of what tool to use. We already have an ios app and an android app, this new project will mostly be a “mathematics” library with lots of computation. Should not have any platform specific code for a while but I cannot be sure it will stay like that forever. I was looking at a KMM project in Android Studio but that comes with code for android app and ios app which I really do not care about. Intellij on the other hand has Mobile Application type project (same as KMM I assume ?), Mobile library which could fit my need? and Library which has common, jvm, js and native stuff and I have no idea if I need all this 😄 Kinda overwhelmed there, thanks for any help 🙂

Does anyone know a fix for not being able to use multiplatform modules inside jvm modules? Even though the module is inluded as a dependency wtih

jvm()

target, its source code can’t be used.

hey guys, what is the best way to fix red gradle configs in kmm project? apart from cache clean/rebuild/cleaning build dirs (because it didn't help). It was working fine yesterday when i reopened today it's not building Adding screenshot also

What would be options (libraries) to read and write zip archives in MPP?

Anyone knows how to fix this?

Execution failed for task ':shared:allTests'.

> Failed to execute all tests:

:shared:iosX64Test: java.lang.IllegalStateException: command '/usr/bin/xcrun' exited with errors (exit code: 148)

Hello, I’m working on a KMP library for both Android/iOS, using Maps, Sets and ArrayDequeues that can be concurrently manipulated from different threads. Are there any available libraries that provide a “thread-safe” version of such collections (via AtomicReferences for example)? I found this one https://gist.github.com/gmazzo/03acdb2e6b59d0394ac69d521e51fea1 but was wondering what were the recommendations here.

I get an error "EXC_BAD_ACCESS" when I try to call "onReceive":

struct ContentView: View {
  @EnvironmentObject var store: ObservablePhotoStore
  var body: some View {
    VStack {
      Button("Show details") {
        store.dispatch(PhotoAction.Refresh())
      }
    }
    onReceive(store.$state) { value in
      print("test")
    }
  }
}

This is the observerved object:

class ObservablePhotoStore: ObservableObject {
   
  @Published public var state: PhotoState = PhotoState(progress: false, photos: [], selectedPhoto: nil, testString: "never updated")
  @Published public var sideEffect: PhotoSideEffect?
   
  let store: PhotoStore
   
  var stateWatcher : Closeable?
  var sideEffectWatcher : Closeable?

  init(store: PhotoStore) {
     
    self.store = store
     
    stateWatcher = self.store.watchState().watch { [weak self] state in
      self?.state = state
    }
     
    sideEffectWatcher = self.store.watchSideEffect().watch { [weak self] state in
      self?.sideEffect = state
    }
  }
   
  public func dispatch(_ action: PhotoAction) {
    store.dispatch(action: action)
  }
   
  deinit {
    stateWatcher?.close()
    sideEffectWatcher?.close()
  }
}

@main
class MyPhotoApp: App {
   
  let photoRepository: PhotoRepositoryImpl
  let store: ObservablePhotoStore
   
  required init() {
    photoRepository = PhotoRepositoryImpl()
    store = ObservablePhotoStore(store: PhotoStore(photoRepository: photoRepository))
  }
   
  var body: some Scene {
    WindowGroup {
      ContentView().environmentObject(store)
    }
  }
}

I'm new to SwitUI and I try to learn from https://github.com/Kotlin/kmm-production-sample how to receive changes in StateFlow to update my Swift UI. I'm looking for a simple way to do that and that sample project is already very complex.

I recently tried to create a new multiplatform project, but I have this error (see thread). If it helps, my kotlin version is 1.5.20. Edit: Fixed. I had initially used openjdk-16 but switched to the Jetbrains-runtime

I was listening to the KMM Webinar today, but I missed one point, where Kathrin says that since the last Kotlin release, we can replace PackForXcode with something else. I was looking into Kotlin 1.5.20 release notes, but I couldn’t find this specific thing. Can anyone provide a link with some information about this new feature?

Hi, I'm getting

No tests found for given includes

error when I try to run my tests. As far as I could find, solutions proposed for this error are: 1. Adding

useJUnitPlatform()

to build.gradle. I'm using junit4 and this doesn't work 2. import

org.junit.jupiter.api.Test

instead of

import org.junit.Test

. Same as above 3. change setting Gradle -> Run Tests Using' from 'Gradle (default)' to 'IntelliJ IDEA'. This setting is not there on Android Studio Arctic Fox or Bumblebee I've tried to copy all the test related codes from KaMPKit and using exactly the same dependency versions as this branch. Same tests run on KaMPKit project but not on my project. Did anyone get this error before? What am I doing wrong?

Hello there, I am trying to use

mParticle

library cocoapod in Kotlin Multiplatform project but am seeing following error

Execution failed for task ':shared:cinteropMParticle-Apple-SDKIos'.
> Process 'command '/Applications/Android <http://Studio.app/Contents/jre/jdk/Contents/Home/bin/java|Studio.app/Contents/jre/jdk/Contents/Home/bin/java>'' finished with non-zero exit value 1

* Exception is:
org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':shared:cinteropMParticle-Apple-SDKIos'.
....

Does anyone have an insight on how I can fix this issue? Thanks

Why I am getting

java.lang.IllegalStateException: org.jetbrains.kotlin.resolve.multiplatform.ExpectedActualResolver@3af53289

?

Maybe some iOS Devs knows this: I try to fetch all images from my photo library using

PHAsset.fetchAssets(with: .image, options: *nil*)

but photos synced from my Mac (shown as "From my mac" in the gallery) are not contained there. How do I fetch also these photos?

Hi everyone! Is it possible to dynamically change the host when making a request? I use ktor to access a local source (host IP is determined from user input) and this code works for Android, but in Ios I get org.koin.core.error.InstanceCreationException: Could not create instance for [Single:'...shared.ktor.LocalKtorApi']

class LocalApi (log: Kermit) : LocalKtorApi {
    private var localUrl = ""

    // If this is a constructor property, then it gets captured
    // inside HttpClient config and freezes this whole class.
    @Suppress("CanBePrimaryConstructorProperty")
    private val log = log

    private val client = HttpClientProvider().getHttpClient(localUrl).config {
        defaultRequest {
            host = ""
            header(HttpHeaders.ContentType, ContentType.Application.Json)
            url {
                //protocol = URLProtocol.HTTPS
            }
        }
        install(JsonFeature) {
            accept(ContentType.Text.Plain)
            val json = Json {
                ignoreUnknownKeys = true
                useAlternativeNames = false
            }
            serializer = KotlinxSerializer(json)
        }

        install(Logging) {
            logger = object : Logger {
                override fun log(message: String) {
                    log.v("Network") { message }
                }
            }

            level = LogLevel.ALL
        }

    }


    init {
        ensureNeverFrozen()
    }


    override suspend fun verifyLocalCredentials(url: String, credentials: String) {
        localUrl = url
        log.v { "credentials: $credentials" }
        return client.get {
            url(path = "/apps")
            header("Authorization", "Basic $credentials")
        }
    }

}

May be the problem is with ios HttpClient? Because it's simply

actual class HttpClientProvider actual constructor() {
    actual fun getHttpClient(
        host: String
    ): HttpClient {
        return HttpClient(Ios){}
    }
}

Hi guys 🙂 Getting stuck here on building for Android on a multiplatform mobile library (which I was not expecting to be the issue 😛) I’ve managed to create an XCFramework for ios thanks to this https://github.com/ge-org/multiplatform-swiftpackage But now, trying to build the android part just doesn’t seem to work. The error I have is

* What went wrong:
Execution failed for task ':compileDebugJavaWithJavac'.
> Failed to calculate the value of task ':compileDebugJavaWithJavac' property 'options.generatedSourceOutputDirectory'.
   > Querying the mapped value of map(java.io.File property(org.gradle.api.file.Directory, fixed(class org.gradle.api.internal.file.DefaultFilePropertyFactory$FixedDirectory, /Users/jeremy/perso/projects/untitled/build/generated/ap_generated_sources/debug/out)) org.gradle.api.internal.file.DefaultFilePropertyFactory$ToFileTransformer@5cf2ca8c) before task ':compileDebugJavaWithJavac' has completed is not supported

I’ll add the entire gradle file in a thread, in case anyone has the slighest idea 🙂 Thanks! 🙂

Hello, is there a way to retrieve the class name of an anonymous class? I have a usecase where I’m passing some objects from Swift to KMP, but when trying to retrieve the class name via

object::class

I only get

class <anonymous>

so calling any of the

::simpleName

or calling

getOriginalClassName

on it just returns null

Hi all, I gave a presentation earlier today on KMM. I would like to share my experiences.