Hey, is it possible to generate common tests dynamically (with a for loop)? I'm using the kmm plugin and have only andorid and ios as targets. I tried to set up junit5 and use TestFactory Annotations but it does not work.

Hello everyone, I have an idea to build Messenger/Chap desktop app like telegram ( I want to use KMM to supported Mac,Windows, Linux, iOS, Android, Web) My goal is using compose-desktop + KMM So I have some questions: 1. is Ktor can handle network for Mac,Windows, Linux, iOS, Android, Web? 2. Which MQTT libs can suitable for Mac,Windows, Linux, iOS, Android, Web? 3. How to include C++ for KMM? example https://github.com/Samsung/rlottie Thanks.

Hi all. Thank you for all your feedback on the Integrate KMM into an existing application article. We’ve completely revamped this article and created a practical step-by-step tutorial with a sample project. Its new name is Make your Android application work on iOS 📱. We’ll greatly appreciate your feedback on the new tutorial in 🧵 or YouTrack. We want to understand whether we’re going in the right direction and create content that is helpful for you! Have a great day! 🙂

I am using the latest Canary Android Studio and just creating a sample KMM project does not compile/sync

I'm working on a multiplatform compose project, but I can't seem to get dependencies to include properly in my

commonMain

module. I add the dependency the way I assume it should work, but it doesn't seem to be included when I'm in source files in

commonMain

any ideas what I could be doing wrong?

Does anyone know why my unit tests testing coroutine stuff doesn’t actually ever stop running

Hi, my 

compileKotlinMetadata

 task is failing in a KMM project when I run

./gradlew build

and I am getting following error. My app runs and build fine when I use IDE, this error only occurs when I use terminal to build or on my CI

DatabaseDispatcher.kt: (4, 27): Unresolved reference: newSingleThreadContext
DatabaseDispatcher.kt: (9, 36): Unresolved reference: newSingleThreadContext
DatabaseDispatcher.kt: (12, 47): Type mismatch: inferred type is Unit but CoroutineContext was expected

This is the class where it is failing

internal object DatabaseDispatcher : BackgroundDispatcher {
    @ExperimentalCoroutinesApi
    private val dbThread by lazy { newSingleThreadContext("database") }

    @ExperimentalCoroutinesApi
    override fun invoke(): CoroutineContext = dbThread

}

I am using these dependendies

kotlin = "1.4.30"
coroutines = "1.3.9-native-mt-2"
serialization = "1.0.1"
ktor = "1.4.3"
klock = "2.0.0"
benasherUUID = "0.2.3"
stately = "1.1.0"
junit = "4.12"
sqlDelight = "1.4.3"

This is how my

build.gradle

looks like

Adding to the list of crazy things that happen with KMP:

* What went wrong:
An exception occurred applying plugin request [id: 'com.android.application']
> Failed to apply plugin 'com.android.internal.application'.
  > Android Gradle plugin requires Java 11 to run. You are currently using Java 1.8.
   You can try some of the following options:
    - changing the IDE settings.
    - changing the JAVA_HOME environment variable.
    - changing `org.gradle.java.home` in `gradle.properties`.

Yes, so I actually changed my java system version:

11:~ ch$ $JAVA_HOME/bin/java -version
java version "11.0.10" 2021-01-19 LTS
Java(TM) SE Runtime Environment 18.9 (build 11.0.10+8-LTS-162)
Java HotSpot(TM) 64-Bit Server VM 18.9 (build 11.0.10+8-LTS-162, mixed mode)
11:~ ch$

Is there a recommend way to encrypt a database in KMP? I've got SqlDelight set up, and SQL Cipher for android from here https://github.com/sqlcipher/android-database-sqlcipher But I'm not sure what to do about desktop and ios. I'm looking to be able to create a backup of one encrypted database of one platform, and decrypt it in another. edit: this looks like it'll work for JVM (desktop) https://github.com/Willena/sqlite-jdbc-crypt/tree/3.33.0.1 still not sure about ios though

Hello, I am attempting to separate my Multiplatform project up in to several modules to be compiled in to one artefact for iOS and Android. If the main module, let’s called it

Primary

, has a class called

Timeline

in kotlin, then this is what I see in the iOS framework header:

__attribute__((swift_name("Timeline")))
@interface ServiceManagerTimeline : ServiceManagerBase

That’s good, it means in Swift I can use a class called

Timeline

. But if I have a class in the second module, called

ServiceManager-common

(a dependency of

Primary

), for example, the class

ClientData

in kotlin, then this is what the header has:

__attribute__((swift_name("ServiceManager_commonClientData")))
@interface ServiceManagerServiceManager_commonClientData : ServiceManagerBase

Which means in Swift I have to use

ServiceManager_commonClientData

class, instead of just

ClientData

. So, looks like that the generated framework always use the second module name as a prefix for all the classes in the second module. I guess that KM does this because to avoid a potential name collision, given that there is no concept of namespace in Swift/ObjC. However, in my case, I am sure there is no name collision. How can I deactivate or override this behavior? Another option I see (I tested it and it is working) is modifying the final .h file and manually modify all the

swift_name

tags. Not very nice, but works. I also tried using

baseName = ""

in the second module but no luck. Any ideas or suggestions welcome. Thanks in advance.

Hello! Maybe I am doing something wrong without realizing, but I am struggling to share code between different KMM modules... If I have: 1. A base KMM module, with code both on

commonMain

and

commonTest

that I want to share (like frameworks, contracts, test utilities, etc) 2. Several other independently built modules, depending on the base module What is the proper way to add the base module on the dependencies of the child modules? Inside the

sourceSets

block, for both

commonMain

and

commonTest

? Can I access classes defined on the base module

commonTest

inside a child module

commonTest

?

Hi all. I am trying to migrate from build.gradle (Groovy) to build.gradle.kts and I am stuck with translating certain part related to tasks. When running build I do not see this task executing. What am I doing wrong?

// -----------Groovy Old
task generateCinteropConfig(type: Exec) {
    workingDir "${projectDir}"
    commandLine 'sh', "${projectDir}/generate_cinterop_conf.sh"
}

gradle.taskGraph.beforeTask { Task task ->
    if (task.project.name.toLowerCase().contains("ios")) {
        "sh ${projectDir}/generate_cinterop_conf.sh ${projectDir}".execute().text
    }
}

// ------------Kotlin DSL New
task<Exec>("generateCinteropConfig") {
    workingDir = File("${projectDir}")
    commandLine = listOf("sh", "${projectDir}/generate_cinterop_conf.sh")
}

tasks.register("generateCinteropConfig") {
    doFirst() {
        if (this.project.name.toLowerCase().contains("ios")) {
            Runtime.getRuntime().exec("${projectDir}/generate_cinterop_conf.sh ${projectDir}")
        }
    }
}

Hi everyone! does anyone have experience using koin + multimodules architecture? I have “:shared” module that inclues a “:networking” module. In the networking module I have module {singleton { A() }}. Everything works in the android app, but in the ios app runtime I get an error:

Koin Context configured. Please use startKoin or koinApplication DSL.

So I updated my AS via JetBrains ToolBox to latest canary version which is Arctic Fox 2020.3.1 Canary 8 and it’s crushing on startup because of KMM plugin 🤔 It was working fine on Canary 7 though. Stacktrace in 🧵

Hello! On my project, I make UseCases in Kotlin and execute UseCase’s  

execute

 method from APP to get value. The return values from UseCases are defined as Results, and puts it in Output of UseCase, and returns it to my APP. Define of Results:

sealed class Results<out T, out S> {
    class Success<out T>(val data: T) : Results<T, Nothing>()
    class Failure<out S>(val cause: S) : Results<Nothing, S>()
}

Sample useCase and it’s IO:

interface SampleUseCaseInterface {
    suspend fun execute(): sampleUseCaseIO.Output
}

class sampleUseCase() : SampleUseCaseInterface {
    override suspend fun execute(): sampleUseCaseIO.Output =
        sampleUseCaseIO.Output(Results.Success("success!"))
}

class sampleUseCaseIO {
    data class Output(val results: Results<String, Error>)
}

Now, I want to mock the execute method of UseCase and return an arbitrary Output in order to write a Unit Test in an iOS app. However, now the following error is displayed and it is not possible to create an arbitrary output. Both data and error are required to be included in Results, and the required Output cannot be created. Is there any way to avoid this? Also, is it possible to realize a mechanism like Either on the iOS side with Kotlin/Native?

Has anyone integrated AppCenter crash reporting SDK into a multiplatform application? Is it something that would be better implemented on the platforms?

I'm using Koin

api("org.koin:koin-core:3.0.0-alpha-4")

and when I add Ktor

implementation("io.ktor:ktor-client-core:1.5.2")

to my build.gradle.kts, all the Koin

org.koin.*

imports start showing errors “Unresolved reference” in Android Studio 4.2-beta5. This is in a shared KMM module. My app compiles and runs without error. But why the IDE errors?

I just finished porting my kotlin multiplatform library from being hosted on bintray to being hosted on maven central, so if anyone else is going through that or just wants to chat about it… here’s a thread for that!

I am happy to announce that I have finally migrated my Android app completely to Kotlin Multiplatform and it is in Production now K Backend is in beta and iOS is still in progress 🙂 I am also planing to write an article about the Architecture(MVVM-SEED) I use in the project later and will post here as well 🙂 Please fell free to check my project and give your feed-back, you are so much welcome to write me in personal or comment under this or Create Issue/PR/Discussion or give Star in GitHub 🙂 I would like to thank for this great community! Happy Coding 💪 https://github.com/CurrencyConverterCalculator/CCC

Hey guys, one of my side projects is an android twitter app using jetpack compose. At some point I decided to just create a library for the new Twitter V2 api, I’m using retrofit and OKHTTP for networking but since I’ve started digging into iOS development I’ve decided I want the library to also be accessible for iOS. Looking at the Ktor docs, it seems pretty straight forward to create some common networking code and platform specific implementations for the things that cannot be shared. Does it make sense to take advantage of KMM here? I think it does, but most of the examples I see around are of KMM applications, all the code is in a single project and not really any ‘libraries’ . I want to provide a library which another person could leverage to create either an Android, iOS or even a KMM app if they wanted to. Thanks

Hi Guys, would like to ask for suggestion on what library to use for Data and Time for KMM?

For those developing KMM with common APIs between IOS and Android, how are you handling the dependency injection in IOS?

I have KMP project with macOS/iOS/Android/Windows targets. In common code I use

kotlinx.coroutines.newSingleThreadContext

Build for the all targets done without error. But if I call

gradle compileKotlinMetadata

I see error

> Task :compileKotlinMetadata FAILED
e: <...>.kt: (28, 9): Unresolved reference: newSingleThreadContext

How can I fix it?

What is the status of KMM iOS on M1 macs? If I create new project in android studio with KMM plugin, open iOS project in Xcode and run on simulator I get error.

Hello, what could be the problem that I see only

ios

and

iosX64

configurations for running tests for

commonTest

and don’t see android?. Project has two targets: android & ios. Thanks. gradle config:

plugins {
    kotlin("multiplatform")
    id("com.android.library")
}

kotlin {
    android()
    ios {
        binaries {
            framework {
                baseName = "shared"
            }
        }
    }
    val isiOSDevice = System.getenv("SDK_NAME").orEmpty().startsWith("iphoneos")
    if (isiOSDevice) {
        iosArm64("ios")
    } else {
        iosX64("ios")
    }
    sourceSets {
        val commonTest by getting {
            dependencies {
                implementation(kotlin("test-common"))
                implementation(kotlin("test-annotations-common"))
            }
        }
    }

    explicitApi()
}

android {
    compileSdkVersion(30)
    sourceSets["main"].manifest.srcFile("src/androidMain/AndroidManifest.xml")
    defaultConfig {
        minSdkVersion(23)
        targetSdkVersion(30)
    }
}

tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile> {
    kotlinOptions {
        jvmTarget = "1.8"
    }
}

What is the recommend way to use

runBlocking

for unit tests in a MPP for native/ios? It looks like kotlinx-coroutines-core:1.4.1 doesn't include

runBlocking

for native.

I am getting this issue when trying to build framework for iOS

> Task :linkReleaseFrameworkIos
ld: framework not found FirebaseFirestore

It happened when I added gitlive/firebase dependency to my project. I have a second project that have the same dependency and it works. Only difference is that in my other project I have cocoapods plugins. What am I missing?

Hello, all! I'm new to Kotlin Multiplatform, trying to use some of my iOS libs code in the Kotlin common code, but I'm having some problems with the cinterop configuration. The klib file seems to be built but when I'm trying to import a class to be used in Kotlin, it's not finding it (not even the package). I've seen that there's a klib utility to inspect it, but I can't find that klib utility. where can I get it?

Is there any guide for creating a library that targets Android, regular JVM, and JS ?

Is it possible in any way to use a compiler plugin with only one of the multiplatform targets? (does that even make sense?) My use case is Anvil, which only support JVM or Android projects for now