Hello. Is there best practics for returns platform Type from

expect

function? For example,

Drawable

for android and

UIImage

for ios?

Are there any samples of building an ios framework using new eap builds? 1.3.20+ versions? My current config fails, and thought I'd ask before I go digging.

I try to implement

LinkedList<E>

(from Java), but what Kotlin list should I extend?

ArrayList

is final, so can't use that, and just

List

makes me implement every method myself 😞 extending

MutableList

is even worse....

Hi All, What is the best/recommended way to migrate existing mobile apps with Kotlin Multiplatform. I am planning to create a MPP library with app network calls and other common util classes from existing app. Thanks.

Also, there doesn't seem to be any way of defining what kind of JS module is being created. CommonJS vs umd vs anything else. If anyone has suggestions in that area, that would be great.

Hey, would be nice if somebody could point what I am doing wrong 😅 trying to get mpp common module working on iOS. Able to run it on Android, however iOS showing

kotlin.TypeCastException

🤨 Common part:

@Serializable
data class Post(
    val userId: Long,
    val id: Long,
    val title: String,
    val body: String
)

class KtorClient : CoroutineScope {
    private val httpClient = HttpClient()

    override val coroutineContext: CoroutineContext
        get() = Job()

    fun getPosts(callback: (String, Throwable?) -> Unit) {
        launch {
            try {
                val raw = httpClient.get<String> {
                    url("<https://jsonplaceholder.typicode.com/posts>")
                }
                println(raw)
                callback(raw, null)
            } catch (e: Throwable) {
                callback("", e)
            }
        }
    }
}

iOS part:

let client = KtorClient()
        client.getPosts { (posts: String, error: KotlinThrowable?) -> KotlinUnit in
            if (error != nil) {
                error?.printStackTrace()
                print(error?.cause ?? "oups")
                print(error?.message ?? "oups")
                return KotlinUnit()
            }
            
            print(posts)
            
            return KotlinUnit()
        }

i regularly see swift (or objc) code in mpp project but based on my understanding kotlin has direct access to android and ios platform api and anything that can be achieved with swift can be implemented w/ kotlin. am i missing something or do people just use swift because they have expertise and legacy code?

So I created a new mpp project (ios+android) with intellij idea tool but I'm unable to create gradle wrapper. There's no build setup in my list, only build and cleanup, nothing between these 2. Am I the only one having this issue? https://kotlinlang.slack.com/archives/C3PQML5NU/p1544541476138600 EDIT: was looking on a subproject, not the root one

Hi, can someone help why this is work with gradle groovy but not with gradle Kotlin?

Hi! I trying to make android/iOS project, but have some problems with dependencies for "actual" part of common code. (details inside thread, coming soon)

Anyone here used mockK to test their common code in multiplatform project? I’m having an

Unresolved reference: mockK

error when building/executing the test even if InteliJ autocompletion finds the library without any problem 😕

I'm trying to setup a multiplatform application project but I can't figure out how to (nicely) get the generated jar to execute it. In the native case there's

kotlin.targets.mingw.compilations.main.getBinary('EXECUTABLE', buildType)

to get the binary for execution. What is the jvm equivalent?

kotlin.targets.jvm.compilations.main.getJar('EXECUTABLE', buildType)

doesn't work 🙂.

Hi guys, so this year, I'm planning to open source some of my internal libraries, gradle plugin, Jenkins script and Jenkins plugins, maybe someone other than me and my team will find them useful. Today I have published the first one. As my first public library I decided to publish my lightweight clean architecture library. This library only contains building block for clean architecture applications. I use it for most of my project and it's a multi-platform project so you can use it for android, Java backend, Ios, Javascript. Library: https://bintray.com/bitsydarel/maven/clean-arch Maven repository : https://dl.bintray.com/bitsydarel/maven/

I have two android library modules called

androidMain

and

helper

. I'd like for

helper

to have a dependency on

androidMain

, but I can't figure out how to make the usual

implementation project(':main')

work. I keep geeting this error:

roject with path ':main' could not be found in root project 'instantsearch-kotlin'.

I've read this paragraph on the website but that didn't really help. https://kotlinlang.org/docs/reference/building-mpp-with-gradle.html#disambiguating-targets. Any help would be greatly appreciated !

A quick question, if I want to compile both iosX64 and iosArm64 that shares the same directory, e.g.

iosMain/kotlin

. How should I go about it? kotlin { targets { fromPreset(presets.android, ‘android’) fromPreset(presets.iosArm64, ‘ios’) { compilations.main.outputKinds(‘FRAMEWORK’) } }

Sorry if today I’m cross-posting everywhere lol 😄 Has anyone used Ktor in a mpp environment and Json serialization? https://kotlinlang.slack.com/archives/C0A974TJ9/p1547140430248900

If anybody's interested, a sqldelight version published for 4.7. Its not quite the same as 1.0 but functional

They might be waiting for next native version. 1.1 apparently doesn't work with 1.0. Also maybe a resoltion on coroutines

I would like to make a multiplatform project with only jvm targets. However, the common source set can't access the JRE classes. I tried adding them as a dependency like so:

implementation(fileTree("$directoryJre/lib/ext"))

which makes them show up in the gradle view of intellij, but it does not work. The same goes for other java dependencies I add in the common source set. It would be useful to be able to configure a multiplatform project as jvm-only, allowing java dependencies as well as the JRE to be accessed from the common source. I have a few use cases where the ability to use expect/actual declarations would be invaluable, and I'm sure that there would be more: • I have a project that I would like to implement as an external process or injected dll • Any project targeting one of a set of libraries per build, for example, minecraft server plugins that support multiple server platforms (bukkit, nukkit, sponge, glowstone) If something like this is already possible using some workaround, please do let me know.

Has anyone shipped an MPP project on iOS? If so, how are you dealing with no dSYMs for the release framework? 😅

Oh, I found a solution here: https://discuss.kotlinlang.org/t/problem-with-lazy-loading-and-lack-of-a-backing-field/1415. A little... special, the java interop here, but I guess that's the cost of automated handling of backing fields etc. Anyway, it now works, and that's the important part. Thanks, Cedric!

Hi guys, I am using Kotlin multiplatform 1.3.11 and I am working on a android/iOS library. I have trouble with some of the crypto related functions on iOS. So far I manage to successfully use CCCrypt, CCCryptorCreate, CCCryptorUpdate and CCCryptorFinal. However when I try to use asymmetric encryption method such as SecKeyCreateRandomKey I got a signal 11: Segmentation fault. Worth mentioning that I am testing those methods via unit test witch launch an iOS simulator without UI. I read that some other people had issue with encryption method and Kotlin native so maybe these are related?? If any of you has an idea ? And also how is it best to debug ? Can I debug Kotlin native code? How can I have a stacktrace or something that will help me identifying the root cause. I know for sure that the call that fails is SecKeyCreateRandomKey regardless of all the parameters variations i tried I always get a segmentation fault.

I have a multiplatform project targeting jvm, android and ios. I have a buildSrc module with

kotlin-gradle-plugin:1.3.11

as a dependency. The same version of the plugin is applied to the whole project. When building, I get the following error:

* Exception is:
org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':client-shared:compileKotlinJvm'.

Caused by: java.lang.NoSuchMethodError: org.jetbrains.kotlin.incremental.BuildUtilKt.makeModuleFile(Ljava/lang/String;ZLjava/io/File;Ljava/lang/Iterable;Ljava/lang/Iterable;Ljava/lang/Iterable;Ljava/lang/Iterable;Ljava/lang/Iterable;)Ljava/io/File;
	at org.jetbrains.kotlin.compilerRunner.GradleCompilerRunner.runJvmCompiler(GradleKotlinCompilerRunner.kt:102)
	at org.jetbrains.kotlin.gradle.tasks.KotlinCompile.callCompiler$kotlin_gradle_plugin(Tasks.kt:405)
	at org.jetbrains.kotlin.gradle.tasks.KotlinCompile.callCompiler$kotlin_gradle_plugin(Tasks.kt:309)
	at org.jetbrains.kotlin.gradle.tasks.AbstractKotlinCompile.execute(Tasks.kt:270)
<12 hidden>
	... 29 more

Is there a modInverse available in Kotlin (mpp)?

Is there a up-to-date resource that I can read regarding publishing a MPP library? I only get as far as publishing to mavenLocal

and how difficult?

Hi guys. I’m writing a multiplatform app with network calls and coroutines. I have basically two Coroutine Dispatchers, one for main and one for i/o operations. On Android, these are defined as Dispatchers.Main and Dispatchers.IO. On iOS, though, I’ve implemented what I’ve seen on many projects/tutorials online: a custom

dispatch_queue

dispatcher that takes a native dispatch queue and calls a

dispatch_async()

on it. The tutorials I’ve seen, though, they use the same dispatch queue for running every operation (the main dispatch queue). Indeed if I try to create a new dispatch queue for network (a new thread), it says it can’t run stuff in it because it can’t use a “non blocked or shared object” on a different thread. Questions: 1. Is there a way to create two threads for two dispatchers and use them with coroutines in Kotlin MPP (I think not, since I’m seeing that there’s an issue filed for it); 2. How bad is running network and UI in the same thread but asyncronously? 3. Are there some limitations for this?