kotlinlang #multiplatform

I have a multiplatform library that only has common code, and targets jvm and Android. When I build it the metadata jar is empty, and so if I try to consume it from another project in the common source set, I can't reference any of my library code. If I add a js target then the metadata jar has the common code in it. Is that expected?

Sergio Casero

11/30/2022, 9:57 AM

Hello folks, is there any way to generate a js library from a kmm library project? I can generate the corresponding js file but it's... empty, this is my config

js(IR) {
        binaries.executable()
        browser {
            commonWebpackConfig {
                outputFileName = "wpi.js"
                outputPath = File(buildDir, "outputs")
            }
        }
    }

and it generates

(function (root, factory) {
  if (typeof define === 'function' && define.amd)
    define(['exports'], factory);
  else if (typeof exports === 'object')
    factory(module.exports);
  else
    root['wpi-wpi'] = factory(typeof this['wpi-wpi'] === 'undefined' ? {} : this['wpi-wpi']);
}(this, function (_) {
  'use strict';
  //region block: pre-declaration
  //endregion
  return _;
}));

//# sourceMappingURL=wpi-wpi.js.map

Artifacts for android and ios are correctly generated

Mendess

11/30/2022, 1:45 PM

How to I get access to the android context in a kotlin multiplatform test? Specifically inside

androidTest

as it wouldn't make sense outside the android source set? I've tried searching for this but I could not find an example that I can understand/works

Mychael Koelfat

11/30/2022, 2:02 PM

Hey everyone. This is probably a really easy issue to fix. Simply said, I've had a working multiplatform implementation. Now I was able to get it implemented on iOS too, however, now coming back to my windows laptop which I use for Android, it gives the

Unresolved Reference

error over the multiplatform method I had made. I feel like it has something to do with my gradle, but I am not quite sure how to fix this. Does anyone have some insight on this? I apologize for if this explanation was too unclear| A bit of more information: Trying to run

gradlew build

I get the error

No matching variant of project :shared was found.

Any insight?

KotlinLeaner

11/30/2022, 2:15 PM

Hi guys, I was started learning multiplatform and now I have basic knowledge of this. My goal is to create a network library which works on Android and iOS. So what is the best recommendations to build library in multiplatform? I was never created a library before. Many thanks.

xxfast

11/30/2022, 10:40 PM

Hi all. One of my builds from my multiplatform library targeting apple platforms consistently seem to run out of memory. I could break this out to multiple jobs - but is this something you've run into in the past?

Stefan Oltmann

12/01/2022, 12:34 AM

I got a problem using SKIA / skiko: I want to create a gray scale image that's the same as created with OpenCV, but it differs. This way I do it in OpenCV:

fun main() {

    OpenCV.loadLocally()

    val image = Imgcodecs.imread("/Users/sol/Pictures/Testfotos/photo_1.jpg")

    val targetImage = Mat(image.height(), image.width(), image.type())

    Imgproc.cvtColor(image, targetImage, Imgproc.COLOR_RGB2GRAY)

    Imgcodecs.imwrite("photo_1_opencv.png", targetImage)
}

And this is the way I do it in SKIA:

fun main() {

    val file = "/Users/sol/Pictures/Testfotos/photo_1.jpg"

    val image = Image.makeFromEncoded(File(file).readBytes())

    val surface = Surface.makeRasterN32Premul(image.width, image.height)

    surface.canvas.drawImageRect(
        image,
        Rect(0f, 0f, image.width.toFloat(), image.height.toFloat()),
        Paint().apply {
            colorFilter = ColorFilter.makeMatrix(
                ColorMatrix(
                    0.299000F, 0.587000F, 0.114000F, 0F, 0F,
                    0.299000F, 0.587000F, 0.114000F, 0F, 0F,
                    0.299000F, 0.587000F, 0.114000F, 0F, 0F,
                    0F, 0F, 0F, 1F, 0F
                )
            )
        }
    )

    val newImage = surface.makeImageSnapshot()

    File("photo_1_skia.png").writeBytes(
        newImage.encodeToData()!!.bytes
    )
}

According to https://docs.opencv.org/4.x/de/d25/imgproc_color_conversions.html this should be the right color matrix. But the result differs. The SKIA version is a bit brighter. I want it to have the same pixel values. What is my mistake here?

Daniel

12/01/2022, 12:51 PM

Hi all, I have a KMM on demand delivery app on Swift and Kotlin. For the repo, should I use dependency injection or singleton class?

Kartik Prakash

12/01/2022, 9:45 PM

Anyone using the kermit’s crashlytics logger and would like to attach custom keys to your crash reports for firebase, here is a PR adding that functionality to kermit’s

CrashlyticsLogWriter

https://github.com/touchlab/Kermit/pull/308

Corey

12/02/2022, 12:06 AM

Hi everyone. Is it possible to share code from

*Test

with the actual target's test? For example, I would like to provide a fake database driver (Sqldelight) to my

ios/Test

target so I can unit test my presentation layer accordingly. Since I do have a

Presenter

in the native platform which injects a

...Query

I would like to know if I can fake it from my

iosTest

and get from the actual

Test

target I have locally.

Jose Flavio

12/02/2022, 3:10 AM

Hi hi everyone 👋 I have a question related of how the KMM frameworks handles the builds... when you create a default KMM project in Android Studio, an iOSapp folder is created, but, do this sub-module is for iOS running on 64bits (intel) Macs? How is it compiled for a real iOS device? I ask this because I changed to an M1 Mac and I realized that I had to add the

iosSimulatorArm64

sourceSet in the gradle file in order to generate de Framework and compile the project in XCode Or maybe is there something that I'm missing?

Michael Paus

12/02/2022, 9:17 AM

message has been deleted

Ninoosvanidze

12/02/2022, 10:38 AM

Hey KMM community 👋 is there any native way to distribute KMM module via spm ?

Elio Maroun

12/02/2022, 11:11 AM

Hello, is it recommended to use GMTDate in multiplatform projects?? Since kotlinx-datetime still did not implement formatting features!

hfhbd

12/02/2022, 12:34 PM

How do you use multiple xcframeworks exposing the same types from a dependency and map this type? I want to create a release xcframework used by the ios app and a test xcframework used by the ios tests. Of course the types in the test xcframework should map to the types used by the release xcframework, but at the moment I get different warnings or different error messages depending on the current workarounds I tried.

Bonsible Hou

12/02/2022, 2:38 PM

Hello, AS show not connected .,but I can run demo. do you meet this?

Steve Malek

12/03/2022, 1:59 AM

Hello, I'm trying to setup Kotlin Multiplatform on my MacBook Pro and per instructions I ran kdoctor to check and see if the environment is setup properly and I get the following error:

steve@OrionMachine

~ % kdoctor

[v] System

OS:

macOS (13.0.1)

CPU:

Apple M1

[v] Java

Java

(openjdk version "19.0.1" 2022-10-18)

Location:

/Library/Java/JavaVirtualMachines/zulu-19.jdk/Contents/Home/bin/java    JAVA_HOME=/Library/Java/JavaVirtualMachines/zulu-19.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: 0.3.4(212-1.7.11-357-IJ)-116[v] Xcode

Xcode

(14.1)

Location:

/Applications/Xcode.app[x] Cocoapods

ruby

(ruby 2.7.7p221 (2022-11-24 revision 168ec2b1e5)

[arm64-darwin22])    ruby gems

(3.1.6)    cocoapods (1.11.3)    *

cocoapods-generate plugin not found

Get

cocoapods-generate from  <https://github.com/square/cocoapods-generate#installationFailures>:

KDoctor has

diagnosed one or more problems while checking your environment.

Please check

the output for problem description and possible solutions.

I installed cocoapods-generate via the following command:

gem install

cocoapods-generate

Successfully

installed cocoapods-generate-2.2.2

Parsing

documentation for cocoapods-generate-2.2.2

Done

installing documentation for cocoapods-generate after 0 seconds

1 gem

installed

I checked to see if it is installed via the following command:

gem list

*** LOCAL

GEMS ***

benchmark

(default: 0.1.0)

bigdecimal

(default: 2.0.0)

bundler

(default: 2.1.4)

cgi (default:

0.1.0.2)

cocoapods-disable-podfile-validations

(0.1.1)

cocoapods-generate

(2.2.2)

csv (default:

3.1.2)

My MacBook pro is Apple M1 chipset running Ventura 13.0.1 At this point I am not sure what the problem is, the ruby version is below 3.0.0 as recommended by kdoctor so don't understand what's causing this error. Any help is appreciated, thank you.

12/03/2022, 4:21 AM

I'm having this warning whenever syncing my gradle config Originally the innertube module was using the standard android kotlin plugin but I changed it to the multiplatform variant. Any idea how to fix it? I'm using kotlin 1.7.21

Path [/home/zt/Documents/Projects/Hyperion/innertube/src/androidTestDebug/assets] of module [Hyperion.innertube.unitTest] was removed from modules [Hyperion.innertube.androidTest]" Also 13 more paths were deduplicated. See idea log for details

@file:Suppress("UnstableApiUsage")

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

kotlin {
    android()

    sourceSets {
        val ktorVersion = "2.1.3"

        val commonMain by getting {
            dependencies {
                // Kotlinx
                val kotlinxSerializationVersion = "1.4.1"
                implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:$kotlinxSerializationVersion")
                implementation("org.jetbrains.kotlinx:kotlinx-serialization-protobuf:$kotlinxSerializationVersion")

                // Ktor
                implementation("io.ktor:ktor-client-core:$ktorVersion")
                implementation("io.ktor:ktor-client-cio:$ktorVersion")
                implementation("io.ktor:ktor-client-encoding:$ktorVersion")
                implementation("io.ktor:ktor-client-content-negotiation:$ktorVersion")
                implementation("io.ktor:ktor-serialization-kotlinx-json:$ktorVersion")
            }
        }

        val androidMain by getting {
            dependencies {
                implementation("io.ktor:ktor-client-android:$ktorVersion")
            }
        }
    }
}

tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile> {
    kotlinOptions {
        jvmTarget = "11"
        freeCompilerArgs = freeCompilerArgs + "-opt-in=kotlinx.serialization.ExperimentalSerializationApi"
    }
}

android {
    namespace = "com.zt.innertube"
    compileSdk = 33

    defaultConfig {
        minSdk = 21
        targetSdk = 33
    }

    compileOptions {
        sourceCompatibility = JavaVersion.VERSION_11
        targetCompatibility = JavaVersion.VERSION_11
    }
}

Anmol Verma

12/03/2022, 2:54 PM

Demo time! End to end encryption! Slack Clone with gRPC and jetpack compose multiplatform UI After a lot of hard work I was able to enable end to end encryption on iOS, Android and Desktop, Here's a demo where a group is created and messages are being shared with each other in real time Libraried used by the Kotlin multiplatform library! 1. Hybrid Encryption using Google/Tink 2. SwiftyRSA Source code for E2ee multiplatform library https://github.com/oianmol/capillary-kmp Source for the main project https://github.com/oianmol/SlackComposeMultiplatform #jetpackcompose #android #ios #kotlin

oianmol_1354x720_1599036896080191489.MP4

Alberto

12/03/2022, 4:40 PM

Hi! I develop a kmm library that uses a pod inside. When i publish this library and use it on another clean kmm project, ios app build failed with this error

Undefined symbol: _OBJC_CLASS_$__TtC11MqttWrapper17BinderWillMessage

it seems that when i try to publish the library, ios don't export her dependencies, Does anyone has some ideas?

Alberto

12/03/2022, 4:42 PM

kotlin {
    android {
        publishLibraryVariants("release")
    }
    val xcf = XCFramework(rootProject.name)

    val nativeTargets = listOf(iosArm64(),iosX64())
    nativeTargets.forEach { target ->
        target.binaries.framework {
            baseName = rootProject.name
            xcf.add(this)
            transitiveExport = true
        }

        target.binaries.staticLib {
            baseName = rootProject.name
        }

        target.binaries.all {
            linkerOpts("-framework","MqttWrapper","-F/build/cocoapods/publish/release/shared.xcframework")
        }
    }


    cocoapods {
        summary = "Some description for the Shared Module"
        homepage = "Link to the Shared Module homepage"
        ios.deploymentTarget = "14.1"
        podfile = project.file("../appIos/Podfile")
        framework {
            baseName = "shared"
            isStatic = true
            embedBitcode(org.jetbrains.kotlin.gradle.plugin.mpp.BitcodeEmbeddingMode.DISABLE)
        }
        
        pod("MqttWrapper") {
            version = "0.1.9"
        }

    }

    sourceSets {
        val commonMain by getting {
            dependencies {
                implementation(libs.kotlin.coroutinesCore)
                implementation(libs.kotlin.datetime)
            }

        }
        val commonTest by getting {
            dependencies {
                implementation(libs.kotlin.testCoroutines)
                implementation(kotlin("test"))
                implementation(kotlin("test-common"))
            }
        }

        val androidMain by getting {
            dependencies{
                implementation(libs.hivemq)
            }
        }
        val androidTest by getting

        //val iosSimulatorArm64Main by getting
        val iosArm64Main by getting
        val iosX64Main by getting

        val iosMain by creating {
            dependsOn(commonMain)
            //iosSimulatorArm64Main.dependsOn(this)
            iosArm64Main.dependsOn(this)
            iosX64Main.dependsOn(this)
        }

        val iosTest by creating {
            dependsOn(commonTest)
        }
    }
}

František Jeřábek

12/04/2022, 4:18 PM

Hi, I am trying to create native application. I am using klib library. The problem is that the klib library is built for x64 so i cannot use it as a dependency in arm builds. So i am wondering if there is any way to have the same code for multiple architectures but different dependencies. I cannot put the code into common, because in the code i am using the library so i would have to put the dependency into common souce set. I can create multiple source sets, but then i would have to copy code or create symlink. So is there any better way ?

Pablo

12/04/2022, 8:45 PM

Hi, does exist a recommended and simple way to deal with multilanguage in kotlin multiplatform? something automatic and equivalent to android strings.xml files distributed in values/values-es/values-de/etc... folders. Thank you.

Eugene Maksymenko

12/04/2022, 11:49 PM

Huge update of WorldWindKotlin KMP 3D map engine with a lot of bugfixes released! https://github.com/WorldWindEarth/WorldWindKotlin/releases/tag/v1.1.3

apvasanth03

12/05/2022, 2:09 AM

Hi All, Reg - KMM App - To showcase Application Architecture In our organization, we are exploring KMM to be used in our Native Application. To showcase it to management we have created a simple KMM application. Application - https://github.com/apvasanth03/KMM-AppArchitecture Kindly have a look and give your valuable feedback. Credits • KaMP Kit by Touchlab Thanks

Raphael TEYSSANDIER

12/05/2022, 2:27 PM

Hello, I try to build a jar in my CI but “Task ‘jar’ not found in project ‘:xxx’.“. But I have the task in local (and it work). It’s like, gradlew doesn’t sync before building.

Daniel

12/05/2022, 7:20 PM

Hello all, any library for Google Places Autocomplete? For Android or/and iOS

Daniel

12/05/2022, 7:23 PM

I want to add the "current location" label on the autocomplete view

Vojtěch Pešek

12/06/2022, 7:29 AM

Hi folks, I’ve released first version of the Kotlin Test Plugin. It helps with writing unit test using the kotlin.test framework for multiplatform mobile projects. Feel free to check it out! You can report bugs and feature requests on the Github repo.

oday

12/06/2022, 9:04 AM

do you know where the actual tutorial for RSS reader in KMM is? it’s supposed to be something like this https://play.kotlinlang.org/hands-on/Networking%20and%20Data%20Storage%20with%20Kotlin%20Multiplatfrom%20Mobile/01_Introduction but i can only find the backing github repo for it, not the actual tutorial, I remember there being a tutorial about it not just the code

Title

oday

12/06/2022, 9:04 AM

Sebastien Leclerc Lavallee

12/07/2022, 3:57 AM

Sorry I can’t help you 😅 but thanks for bringing that to me. I didn’t know this existed and it’s very valuable for me! 😛arty-parrot:

oday

12/07/2022, 9:29 AM

👍🏻

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