kotlinlang #multiplatform

Hey guys! I am trying to send an image from Android/iOS to the backend using ktor-client, which requires to convert the Image file into a ByteArray first. I can’t find a library that supports both Android and iOS. Is

expect/actual

the only way to handle this use case?

👍🏻 1

👍🏾 1

clark

09/11/2021, 4:34 AM

Hey everyone, I recently started seeing a bug with the

multiplatform-settings

library where anytime I try to init the no arg version in my commonMain code, it throws a

NullPointerException

. See thread for code.

Boris Yordanov

09/11/2021, 9:12 AM

Anyone using moko -resources for colors with compose/swiftui? Their colour resource does not have resourceID, similarly to how we get strings - MR.strings.my_atring.resourceId

Matias Forbord

09/12/2021, 4:11 AM

I've looked far and wide but haven't found examples of a KMM (Android/iOS) media player. Does anyone have advice on where/what to look for, in terms of learning the best approach to playing audio on both devices in a KMM architecture? • https://github.com/icerockdev/moko-media seems like it could be exactly this, but I've had trouble getting this running, and I have a hard time making out if it only supports picture media as of yet. • https://github.com/korlibs/korau is very cool, but it is targeting Kotlin Native as far as I understand. New to the JVM world but adore Kotlin, so I'm not quite clear on whether this would be something you'd use in KMM.

Big Chungus

09/12/2021, 12:34 PM

How can I restrict publishing my android artefacts only on a particular host in KMP library project?

Javier

09/12/2021, 7:56 PM

Anyone has noticed that if you control click in a function JVM library which is an

expect

inside of a KMP library with Android and JVM, it redirects to the Android

actual

instead of the JVM

actual

:yes: 1

mbonnin

09/13/2021, 8:05 AM

Can I create a (edit: Native) MacOS app without writing a single line of Swift? If yes, is there a sample somewhere?

Louis

09/13/2021, 9:35 AM

Hello ! Is there a way to share test code between Android and commonTest packages ? For example I want an utility function available for those 2 packages

than_

09/13/2021, 11:22 AM

hi, has anyone successfully published multiplatform library to Artifact Registry? I'm getting

Execution failed for task ':publishJvmPublicationToMavenRepository'.
> Failed to publish publication 'jvm' to repository 'maven'
   > Could not write to resource '<https://europe-central2-maven.pkg.dev/...>'.
      > Connection reset by peer: socket write error

for

publishing{    
    repositories {
            maven {
                url = uri("<https://europe-central2-maven.pkg.dev/>...")
                credentials {
                    username = "_json_key_base64"
                    password = artifactRegistryMavenSecret
                }
                authentication {
                    create<BasicAuthentication>("basic")
                }
            }
        }
    }

Stefan Oltmann

09/13/2021, 2:45 PM

Is there an easy way to use the same name for multiple targets? Like the

ios()

target bundles

iosArm64

iosX64

I want the architectures iosArm64(), iosSimulatorArm64(), macosX64() and macosArm64() in a common

iosMain

iosTest

source set. But everything the

ios()

method calls is private and I would basicly copy everything to make it work that way. Feels wrong. What is the intended way to solve that?

✅ 1

David Liu

09/13/2021, 9:18 PM

Hi, I am converting my android library to support multiplatform (android & ios) but I have encountered the dependencies issue with coroutines. I am using

Kotlin v1.5.30

and

coroutines v1.5.2-native-mt

. Does anyone have experienced the same issue?

w: skipping /Users/davidliu/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlinx/kotlinx-coroutines-core-iosx64/1.5.2-native-mt/fd419ceca95f3403fe6e22ec714dd04a746656a/kotlinx-coroutines-core.klib. Incompatible abi version. The current default is '1.4.2', found '1.5.0'. The library produced by 1.5.30 compiler

e: Could not find "/Users/davidliu/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlinx/kotlinx-coroutines-core-iosx64/1.5.2-native-mt/fd419ceca95f3403fe6e22ec714dd04a746656a/kotlinx-coroutines-core.klib" in [/Users/davidliu/Repostories/android-library, /Users/davidliu/.konan/klib, /Users/davidliu/.konan/kotlin-native-prebuilt-macos-1.5/klib/common, /Users/davidliu/.konan/kotlin-native-prebuilt-macos-1.5/klib/platform/ios_x64]

Stefan Oltmann

09/14/2021, 7:13 AM

Did anyone found a workaround for the problem that currently you can't create XCFrameworks containing macOS X64 & ARM64 with Kotlin 1.5.30? It's an open issue and somewhere in the roadmap. https://youtrack.jetbrains.com/issue/KT-47355 What are my options to work around that limitation? I tried to export it as a separate XCFramework / framework and combine it with the

lipo

command but no success.

Philipp Bykow

09/14/2021, 11:15 AM

Hello all, currently im trying to use Kotlin Multiplatform for an android and iOS app. Everything works fine in xcode and android Studio until i try to build the ios App with fastlane. Then i get the error message IPA processing failed. Any idea ?

Rak

09/14/2021, 1:05 PM

Hi, a couple of months ago I tried out KMM (and got some really good help here, thanks@), I had a few issues notably deploying on iOS did not work reliably. Anyway, the world of KMM moves fast and I;m sure there is a new IDE version and libs to use. I want to create a KMM lib that does network calls as a first step. My question is, if I was to start from scratch what route do you recommend? The sample KMM project generated by Android STudio in the latest Arctic Fox (or some other version?) Or should i try the KampKit?

benkuly

09/14/2021, 1:42 PM

Is it possible to use the same code for jvmMain and androidMain but with slightly different dependencies? This does not work, because then jna classes are duplicated:

val jvmMain by getting {
    dependencies {
        implementation("net.java.dev.jna:jna:${Versions.jna}")
    }
}
val androidMain by getting {
    dependsOn(jvmMain)
    dependencies {
        implementation("net.java.dev.jna:jna:${Versions.jna}@aar")
    }
}

Anil Kumar

09/14/2021, 4:25 PM

Is there any way I can add a Kotlin multiplatform library (which does networking and SQL database transactions) to an existing Android and iOS project? Most of the tutorials I see are starting a project form scratch.

MarkRS

09/14/2021, 5:25 PM

Is there any way to keep the compiler happy about properties of a shared class which are inherited in a platform specific area? Billing code can be abstracted away from Google and Apple billing with classes in the correct sections that inherit from them appropriately, but do I have to choose names distinct from both? Is that a clear enough question?

jean

09/15/2021, 7:16 AM

I’m following what KaMPKit wrote in this stackoverflow thread to test my sqldelight queries https://stackoverflow.com/questions/65663436/how-to-write-unit-tests-for-sqldelight-on-kmm My test succeeds in android but I get

kotlin.IllegalStateException: There is no event loop. Use runBlocking { ... } to start one.

when running the same test for ios. this is my BaseTest class in

iosTest

actual abstract class BaseTest {
    @OptIn(DelicateCoroutinesApi::class)
    actual fun <T> runTest(block: suspend CoroutineScope.() -> T) {
        var error: Throwable? = null
        GlobalScope.launch(Dispatchers.Main) {
            try {
                block()
            } catch (t: Throwable) {
                error = t
            } finally {
                CFRunLoopStop(CFRunLoopGetCurrent())
            }
        }
        CFRunLoopRun()
        error?.also { throw it }
    }
}

I just copied what they have. Any idea what I’m doing wrong?

Kareem Waleed

09/15/2021, 8:32 AM

Hello guys, can anyone help me with this ? https://stackoverflow.com/questions/69189540/how-to-successfully-publish-a-kmm-library-on-localmaven-for-android-project-to Thanks 😄

orafaaraujo

09/15/2021, 11:54 AM

Hello, Does anyone one knows if is possible to use camelcase in the import of the shared module in the Swift class? Already tried to rename the module but no success Thank you

👆 1

😒ame: 1

Alex Brown

09/15/2021, 2:28 PM

Hey 👋 Has anyone had any success linking the shared framework from a KMM project in Xcode 13? I can produce the framework for

Arm64

builds, but when I try and export for

X64

I get the following error:

Execution failed for task ':shared:linkDebugFrameworkIosX64'

Even when I do successfully export an Arm framework I get loads of build errors. Just wondered if anyone has already solved this problem, whether this a known issue or unique to our project setup. Thanks!

leandro

09/15/2021, 7:43 PM

how can i configure the multiplatform plugin once (lets say to enforce the

explicitApiWarning

and have it applied for all my multiplatform modules? I currently have applied it on my root build.grade but it is causing other problems (eg. scratch files not working). Is there another way of doing it?

Osman Saral

09/16/2021, 12:25 PM

Hello, I'm getting "Could not identify native targets for platform: 'iphonesimulator' and architectures: '[]'" does anyone know the reason?

Martin Rajniak

09/16/2021, 5:08 PM

Hey folks, I want to use Firestore and Cloud Storage from my KMM app. What is the best approach nowadays. I have seen https://github.com/gitliveapp/firebase-kotlin-sdk/ ( that seem to wrap native Firebase libraries ). It is missing Cloud Storage support but from the look of other implementations, it seems like a not that big effort. My question, isn't it better to use REST API directly from shared code?

Martin Rajniak

09/17/2021, 11:17 AM

Hello nice people, I am trying to use iOS Firebase dependency in KMM through CocoaPods ( https://kotlinlang.org/docs/native-cocoapods.html#add-dependencies-on-pod-libraries ) and I am getting:

The /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld command returned non-zero exit code: 1.

output:

Undefined symbols for architecture arm64:

"_OBJC_CLASS_$_FIRStorage", referenced from:

objc-class-ref in result.o

ld: symbol(s) not found for architecture arm64

Any idea where to go from here?

matej

09/17/2021, 12:57 PM

We're getting a build error with Xcode 13 RC that was not there in Beta 5:

Exception in thread "main" java.lang.Error: /var/folders/r8/cq5z9sk940sbz3kq52q5x4fx11kwqx/T/1091386677463552763.m:1:9: fatal error: could not build module 'SQLCipher'
at org.jetbrains.kotlin.native.interop.indexer.UtilsKt.ensureNoCompileErrors(Utils.kt:192)
at org.jetbrains.kotlin.native.interop.indexer.ModuleSupportKt.getModulesASTFiles(ModuleSupport.kt:68)
at org.jetbrains.kotlin.native.interop.indexer.ModuleSupportKt.getModulesInfo(ModuleSupport.kt:14)
at org.jetbrains.kotlin.native.interop.gen.jvm.MainKt.buildNativeLibrary(main.kt:531)
at org.jetbrains.kotlin.native.interop.gen.jvm.MainKt.processCLib(main.kt:268)
at org.jetbrains.kotlin.native.interop.gen.jvm.MainKt.interop(main.kt:76)
at org.jetbrains.kotlin.cli.utilities.InteropCompilerKt.invokeInterop(InteropCompiler.kt:45)
at org.jetbrains.kotlin.cli.utilities.MainKt.mainImpl(main.kt:38)
at org.jetbrains.kotlin.cli.utilities.MainKt.main(main.kt:60)

> Task :cinteropSQLCipherIos FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':cinteropSQLCipherIos'.
> Process 'command '/Library/Java/JavaVirtualMachines/jdk-15.0.2.jdk/Contents/Home/bin/java'' finished with non-zero exit value 1

There was no change to our code, the only difference is the Xcode update. Anyone had anything similar?

Michal Klimczak

09/17/2021, 1:22 PM

I was super hyped for apple silicon support (especially the

iosSimulatorArm64

target), but a few libraries need to be updated first. For me it was: • ktor 1.6.3 • sqldelight 1.5.1 • multiplatform-settings 0.8 • koin 3.1.2 • koru 0.8.0 (which I'm working on to support asap in 0.9.0)

👍 1

🤔 1

MarkRS

09/17/2021, 1:54 PM

Is it possible to construct a settings manager in KMM? My app has user settings. Can I have a common settings manager and allow each platform to work with their respective details? I can see how to do this for the Android section, androidmain allows me to import Android sharedPreferences, but I can't import iOS userPreferences there, so I don't see how to make this work 😞 A pointer (sic) would be very gratefully received.

Kurt Renzo Acosta

09/17/2021, 2:03 PM

Has anyone encountered an issue where you can build through Android Studio but not on Xcode? AS builds fine when running

cinterop

via cocoapods but on Xcode it doesn’t. Also, when checking on

build/cocoapods/synthetic

, the Pods are in there! On Xcode we get this error:

> Task :shared:firebase:auth:cinteropFirebaseAuthIos FAILED
Exception in thread "main" java.lang.Error: /var/folders/2d/bfr1v4wn0nd926jj62ztw0m80000gn/T/3409687098729027093.m:1:9: fatal error: module 'FirebaseAuth' not found
	at org.jetbrains.kotlin.native.interop.indexer.UtilsKt.ensureNoCompileErrors(Utils.kt:152)
	at org.jetbrains.kotlin.native.interop.indexer.ModuleSupportKt.getModulesASTFiles(ModuleSupport.kt:68)
	at org.jetbrains.kotlin.native.interop.indexer.ModuleSupportKt.getModulesInfo(ModuleSupport.kt:14)
	at org.jetbrains.kotlin.native.interop.gen.jvm.MainKt.buildNativeLibrary(main.kt:515)
	at org.jetbrains.kotlin.native.interop.gen.jvm.MainKt.processCLib(main.kt:266)
	at org.jetbrains.kotlin.native.interop.gen.jvm.MainKt.interop(main.kt:76)
	at org.jetbrains.kotlin.cli.utilities.InteropCompilerKt.invokeInterop(InteropCompiler.kt:45)
	at org.jetbrains.kotlin.cli.utilities.MainKt.mainImpl(main.kt:38)
	at org.jetbrains.kotlin.cli.utilities.MainKt.main(main.kt:60)
:shared:firebase:auth:cinteropFirebaseAuthIos (Thread[Execution worker for ':' Thread 3,5,main]) completed. Took 6.607 secs.

darkmoon_uk

09/17/2021, 2:35 PM

It seems that many MPP projects will want to be opened in both Android Studio and IntelliJ IDEA at some point. • Android Studio to work with the latest tooling on the Android side (Compose previews) • IntelliJ to gain access to JVM debugging for the Desktop/Server parts - because JVM debugging doesn't work at all, by design, on AS? I'm there now: Gradle config is mostly compatible between the two, the blocker is the different Android Gradle Plugin version required by each IDE. How are people dealing with this? • Having entirely separate Gradle projects to open in each IDE? • Or working with a lowest-common denominator Android config that works with either Gradle plugin? • Not using Android Studio and only using IntelliJ for all parts of the project? This is a barrier to adoption for MPP + Compose. It would be enough if I could just ignore the Android plugin and targets when opening in IntelliJ, but that's easier said than done because if you switch off the plugin, other syntax becomes invalid.

➕ 3

👀 1

☝️ 2

Title

darkmoon_uk

09/17/2021, 2:35 PM

➕ 3

👀 1

☝️ 2

Javier

09/17/2021, 3:07 PM

The problem is on Google side: https://issuetracker.google.com/issues/198176809

⭐ 2

Personally, I hope a lot I can just use the latest stable version of AGP in the latest stable IntelliJ IDEA, but now it is an awful experience, because the delay until AGP supports the latest IDEA is counted in months...

darkmoon_uk

09/17/2021, 3:23 PM

That's interesting @Javier, I didn't realise that AGP latest actively prevents itself being used in IntelliJ. I suppose it's a matter of who is going to put in the testing effort as well.

Javier

09/17/2021, 3:24 PM

personally I would like to have a "force" option to try to use the latest agp, maybe it just works

➕ 3

darkmoon_uk

09/17/2021, 3:24 PM

Starred FWIW. I hope JetBrains and Google can come up with some kind of solution, I'm not even talking about having full functionality in both IDE's - just a way that we can even open a mixed MPP project at all, to use the current support from each IDE.

I can think of one way to achieve it, by having totally separate Gradle root projects for each IDE, then flat include all the project submodules.

That's quite a lot of structural upheaval in my project for the sake of one plugins 'artificial' incompatibility 😞

Javier

09/17/2021, 3:27 PM

the problem is 4.2.2 can have different configs which break with 7.0.2

like the new way to declare sdk versions

so maintaing two different configs is just... 💤

darkmoon_uk

09/17/2021, 3:28 PM

Yes there are creeping differences in their syntax, some of which can be worked around, but it starts to get like walking on ice.

Also e.g.

7.0.2

buildTypes {
    release {

vs.

4.2.2

buildTypes {
    getByName("release") {

It's confronting, because now I can't debug my Server and Desktop parts at all.

Javier

09/17/2021, 3:31 PM

getByName should work on 7.0.2, no?

darkmoon_uk

09/17/2021, 3:31 PM

Yes that will, but just an example where there's drift in the recommended syntax.

I think I'll have another go at trying to achieve the lowest denominator syntax between the plugins.

Did you try, or have any luck with that?

Javier

09/17/2021, 3:33 PM

no, probably if you dont migrated the deprecated properties to the new 7.0.2 approach it should work without doing nothing

darkmoon_uk

09/17/2021, 3:33 PM

I have this in my

buildSrc

BTW:

val AndroidGradlePlugin = when (BuildSettings.environment) {
            BuildEnvironment.IntelliJ -> "4.2.2"
            else -> "7.1.0-alpha11"
        }

Javier

09/17/2021, 3:33 PM

just changing from 4.2.2 to 7.0.2

not sure about 7.1 tho

👍 1

mbonnin

09/17/2021, 6:03 PM

I've been trying all kind of things. Since I don't use Compose that much, I tend to stay on AGP 4.2.2 + IntelliJ.

I've had some success ignoring parts of the build with

if (System.getProperty("idea.sync.active") == null) {
      // Do some stuff with AGP
    }

Maybe there's a property that allows differentiating between AS/IntelliJ where you can change the logic/plugin versions/etc..

But I'm eagerly waiting on AGP 7.x to be compatible with IntelliJ too

Mărcuţ Andrei

09/20/2021, 10:37 AM

Could this option be a workaround - to turn .iml project files to ON in AS and separately keep IJ with the .idea folder? Haven’t tried it myself, just an idea.

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