kotlinlang #multiplatform

I think I'm stuck between two bugs trying to get Android Studio to behave nicely. Since updating to Kotlin 1.7.0, some libraries (moko-resources-compose) don't resolve in the IDE. https://issuetracker.google.com/issues/231701341 adding the workaround suggested there (adding commonMain to the androidMain srcDir) fixes that issue, but then androidMain doesn't seem to be able to resolve anything from commonMain, strangely. I've tried using almost every version of AGP and AS. currently I'm on dolphin with AGP 7.3.0-rc01. Has anyone else had this issue and figured out a working solution?

adjpd

08/18/2022, 5:34 PM

Is anyone using 1.7.10 for a KMM project that targets iOS?

juh juh

08/18/2022, 7:33 PM

Are there runtime methods to check which platform code is running on?

juh juh

08/18/2022, 8:01 PM

How do I read files from

Resources

folder on Kotlin/Multiplatform? Is there a built-in solution, or do I need to use external library?

Raymond Zeng

08/19/2022, 12:45 AM

Hey folks, our team is looking into DI solutions for multiplatform, with a focus on compile-time solutions (and Koin as a fallback). We've come across Kotlin-Inject and Kinzhal - are there any other libraries that are currently out there that we should take a look into?

Sebastian Sellmair [JB]

08/19/2022, 1:20 PM

📣 📣 We merged :android: Android Studio ⚡ Electric Eel 🐍 Canary 9 into intellij/master 📣 📣 We expect Android Plugin Updates to be in intellij faster from now on! Also: Android Studio Electric Eel Canary 9 finally seems to have pretty good support for Kotlin/Multiplatform. There were many, many issues fixed that lead to red code in Android Studio :blob-smile-happy: Merging hero: @andrei.kuznetsov

kenkyee

08/19/2022, 1:21 PM

wow…that’s amazing…never thought that would happen :android-dance:

Sachinda Liyanaarachchi

08/19/2022, 6:05 PM

hello, I have a question related to KMM shared gradle: There is one library that is related to fritz2 but should be added in commonMain dependencies. But when I run ios it is giving me an error. How can I leave this library in commonMain and exclude it when running ios?

Jeff Lockhart

08/20/2022, 3:23 PM

Does it still compile? You could probably add:

@Suppress("UNINITIALIZED_VARIABLE")

above the line to hide the IDE error. It's not uncommon that the IDE displays false positive errors that aren't actually compilation errors with KMP.

Pedro Henrique

08/20/2022, 11:48 PM

I' ve published a library to Maven that uses Kotlin 1.7.20-Beta + API/Language version of 1.8. With the same settings, using this library through Gradle, it runs fine, but on IntellIJ I get a message saying that 'it is compiled by a pre-release version of Kotlin and cannot be loaded by this version of the compiler'. It only happens on JVM and IDEA-side, since I can build it normally and common and JS platforms aren't giving me this error. Is there any workarounds to this issue? I posted this first on #intellij, but since it is a Multiplatform-related issue, I think it is worth posting here as well.

Smorg

08/21/2022, 1:37 AM

Hello here, I added the

javax.inject

lib to a multiplatform module in my project but couldn’t import the classes/annotations in my source, and I am trying to understand why. Any pointers would be appreciated. Thanks.

Smorg

08/21/2022, 1:44 AM

In addition, has anyone also tried to use Hilt from Android in a kmm project? Wondering how it can be integrated, maybe in full for DI across the project or at least the Android part/modules of the project. Thank you.

Marco Righini

08/21/2022, 11:08 AM

Hello everybody, we are having issues with composite build. When you are referencing a class that is in a different gradle module and this module is sharing the same package prefix the IDE shows red import (the ide tries to resolve the symbol in the same module) (Android Studio EE Canary 9). The project builds fine. In case you are interested https://youtrack.jetbrains.com/issue/KTIJ-18903

Tim Ortel

08/21/2022, 7:49 PM

Hi! Two months ago I already announced my development of a Gradle Plugin that brings gRPC to Kotlin Multiplatform. I have finally added iOS support. Therefore, it now allows you to make client-side calls from multiplatform code to Android, iOS, JVM and JS targets, as such allowing you to share your network logic. Once again, I would greatly appreciate any feedback on the project! https://github.com/TimOrtel/GRPC-Kotlin-Multiplatform

Noop

08/22/2022, 8:28 AM

I tried below, but I got error. How can i do? https://kotlinlang.org/docs/multiplatform-mobile-integrate-in-existing-app.html#make-your-cross-platform-application-work-on-ios

Build was configured to prefer settings repositories over project repositories but repository 'ivy' was added by build file 'shared/build.gradle.kts'

Ben Edwards

08/22/2022, 10:24 AM

TLDR: Advice on learning Kotlin for KMM. Hi, just starting my Kotlin journey. I did a couple of weeks doing basic Kotlin tutorials now I'm doing the doing udemy 'Android App Development Masterclass using Kotlin' . My ultimate aim is to develop multiplatform mobile apps (KMM). Thought doing Android apps first was a good approach. I have been programming for over 20 years, mainly using Oracle PL/SQL, quite a bit of bash, and some Ruby, and spend 80 days learning Python (udemy .100 Days of Code: The Complete Python Pro Bootcamp for 2022'). I'm fairly committed and planning on doing 6 hours a day Monday-Friday at least. So my questions are, is this a good approach, and any advice? Also what state is KMM in? It won't be 3 to 6 months before start developing in anger.

Ben Edwards

08/23/2022, 11:10 AM

@uli posted https://dev.to/s2engineers/the-future-of-cross-platform-development-kotlin-multiplatform-35n8 in another thread. This was very interesting. It was written 21 Dec 2020. Would love an update. Or maybe there is an actively updated webpage that shows the current state of KMM? PS just read https://blog.jetbrains.com/kotlin/2022/05/kotlin-multiplatform-mobile-beta-roadmap-update/ 31 May 2022. Looking promising.

Kwabena Berko

08/23/2022, 5:09 PM

Hi folks, How do I run a custom gradle task that only runs after the build tasks completes in a KMM project?

tasks.register("copySomething", Copy::class) {
   println("How Do I Run This Task After Build Completes?")
}

jacksonfdam

08/24/2022, 10:22 AM

Guys, I am having some issues with multiple KMM modules depending on other KMM modules.

Sebastian Sellmair [JB]

08/24/2022, 11:14 AM

Hey Folks 👋 I was once convinced that sharing code between android + jvm (https://youtrack.jetbrains.com/issue/KT-42466/HMPP-JVM-Android-intermediate-source-set) is underrated. I wanted to write an internal document, making a case for it and trying to raise awareness. However, I currently fail to compile good enough arguments. So: If there is anybody who also thinks this is important, would you mind sharing your thoughts? (You’re also invited if you think this case is not important)

Don.Robertson

08/24/2022, 10:56 PM

• Hi all. Beginner’s question. I have a KMM app that imports (reusable) code from another KMM library (into shared module). The gradle sync works fine. If I build within Android Studio the build fails because it doesn’t find the imports from the shared lib. But if I run the Android emulator the app runs fine (I’ve made visual changes to make sure it is running a current build, and it is definitely executing the code that breaks the build). How is this possible? I’m hoping someone will recognize the strange behavior and give me a clue as to my error with the dependencies.

Asad Mukhtar

08/25/2022, 6:56 AM

Hi, everyone can you please let me know, can i use Compose for building Android UI, and swiftUI for IOS in KMM project?

Sreeramktm 27

08/25/2022, 7:40 AM

Hi everyone, is there any library to support json handling in KMM. I am trying to have common json implementation across platforms. Found kotlinx.serialization, which can be used in common and android but not in iOS.

Francis Mariano

08/25/2022, 7:25 PM

please, where do I find good samples projects using KMP (android/ios/js/backend) ?? thanks a lot

Ciaran Sloan

08/26/2022, 10:18 AM

Has anyone any experience with swifts

deinit

function on classes that are extended from a kotlin class? I'm having a weird crash with little info in the stack trace. I've created an open class in my shared module and extending that class in Swift. I want to perform some operation in the

deinit

function (a cleanup of sorts), but im getting a crash when trying to access a protected property of the base class from the deinit function. I'm suspecting that possibly this object no longer exists? But I can't get enough information from the stacktrace to determine this

Vitor Hugo Schwaab

08/26/2022, 7:54 PM

So.... composite builds + hierarchical project structure = IDE not able to solve common code references, right? I have a structure like so:

AndroidAppProject
-app
-appModuleA
-appModuleB
-multiPlatformProject 
 |-multiPlatformModuleA
 |-multiPlatformModuleB

multiPlatformProject and its contents are included via

includeBuild

. Stuck on Kotlin 1.6.10 because of this. I came across this super creative work-around to trick the IDE into thinking we're using 1.6.10 in order to keep it working, but it didn't do the trick for me. Anyone else working around this issue?

fathony

08/27/2022, 5:06 AM

Hi, I'm trying to implements an interface that returns Flows on swift, something like

callbackFlow {}

in Kotlin. For example:

// Kotlin common
interface Repository {
    fun location(): Flow<LatLng>
}

// Kotlin android
class AndroidRepository : Repository {
    override fun location(): Flow<LatLng> = 
        callbackFlow {
            // some implementation 
        }
}

How should I implements those on swift?

// Swift iOS
class IosRepository : Repository {
    func location() -> // how to?
}

I'm already looking at the topics but unable to find anything that solves above issue. Am I missing something here?

miqbaldc

08/27/2022, 7:16 AM

[v] System                                           
    OS: macOS (11.6)
    CPU: Apple M1
[v] Java
    Java (openjdk version "11.0.14" 2022-01-18 LTS)
    Location: /Library/Java/JavaVirtualMachines/zulu-11.jdk/Contents/Home/bin/java
    
    JAVA_HOME=/Library/Java/JavaVirtualMachines/zulu-11.jdk/Contents/Home
    
    * Note that, by default, Android Studio uses bundled JDK for Gradle tasks execution.
          Gradle JDK can be configured in Android Studio Preferences under Build, Execution, Deployment -> Build Tools -> Gradle section
    
[v] Android Studio
    Android Studio (2021.2)
    Location: /Applications/Android <http://Studio.app|Studio.app>
    Bundled Java: openjdk 11.0.12 2021-07-20
    Kotlin Plugin: 212-1.7.10-release-333-AS5457.46
    Kotlin Multiplatform Mobile Plugin: 0.3.3(212-1.7.0-RC-release-217-IJ)-104
    
[v] Xcode
    Xcode (13.2.1)
    Location: /Applications/Xcode.app
    
[v] Cocoapods
    ruby (ruby 2.7.6p219 (2022-04-12 revision c9c2245c0a) [arm64-darwin20])
    
    ruby gems (3.3.11)
    
    cocoapods (1.11.3)
    
    cocoapods-generate (2.2.2)
    
Your system is ready for Kotlin Multiplatform Mobile Development!

Title

miqbaldc

08/27/2022, 7:16 AM

[v] System                                           
    OS: macOS (11.6)
    CPU: Apple M1
[v] Java
    Java (openjdk version "11.0.14" 2022-01-18 LTS)
    Location: /Library/Java/JavaVirtualMachines/zulu-11.jdk/Contents/Home/bin/java
    
    JAVA_HOME=/Library/Java/JavaVirtualMachines/zulu-11.jdk/Contents/Home
    
    * Note that, by default, Android Studio uses bundled JDK for Gradle tasks execution.
          Gradle JDK can be configured in Android Studio Preferences under Build, Execution, Deployment -> Build Tools -> Gradle section
    
[v] Android Studio
    Android Studio (2021.2)
    Location: /Applications/Android <http://Studio.app|Studio.app>
    Bundled Java: openjdk 11.0.12 2021-07-20
    Kotlin Plugin: 212-1.7.10-release-333-AS5457.46
    Kotlin Multiplatform Mobile Plugin: 0.3.3(212-1.7.0-RC-release-217-IJ)-104
    
[v] Xcode
    Xcode (13.2.1)
    Location: /Applications/Xcode.app
    
[v] Cocoapods
    ruby (ruby 2.7.6p219 (2022-04-12 revision c9c2245c0a) [arm64-darwin20])
    
    ruby gems (3.3.11)
    
    cocoapods (1.11.3)
    
    cocoapods-generate (2.2.2)
    
Your system is ready for Kotlin Multiplatform Mobile Development!

Aditya Kurkure

08/28/2022, 8:11 AM

Have you tried the solutions listed here? https://kotlinlang.org/docs/native-cocoapods.html#possible-issues-and-solutions

miqbaldc

08/28/2022, 12:27 PM

Unfortunately, I'm using Reguler framework (not currently using cocoapods) and running the

embedAndSignAppleFrameworkXcode

Meherdatta Chepuri

03/09/2023, 11:57 PM

Did it work for you?

miqbaldc

03/10/2023, 2:43 AM

still not works unfortunately

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