Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Understanding Kotlin Multiplatform (Busan)
Search
HyunWoo Lee
September 07, 2025
Programming
0
19
Understanding Kotlin Multiplatform (Busan)
Google I/O Extended Busan 2025에서 진행한 Understanding Kotlin Multiplatform의 Speaker Deck입니다.
HyunWoo Lee
September 07, 2025
Tweet
Share
More Decks by HyunWoo Lee
See All by HyunWoo Lee
Understanding Kotlin Multiplatform
l2hyunwoo
0
280
파급효과: From AI to Android Development
l2hyunwoo
0
230
선언형 UI에서의 상태관리
l2hyunwoo
0
520
선언형 UI를 학습할 때 알아둬야하는 키워드들
l2hyunwoo
0
450
Essential concepts to know when learning Declarative UI
l2hyunwoo
2
1.4k
React Native under the hood
l2hyunwoo
0
120
유연한 Composable 설계
l2hyunwoo
0
690
KotlinConf 2024 Global in South Korea Keynote
l2hyunwoo
0
130
TextField 씹고 뜯고 맛보고 즐기고
l2hyunwoo
0
440
Other Decks in Programming
See All in Programming
tool ディレクティブを導入してみた感想
sgash708
1
160
TDD 実践ミニトーク
contour_gara
1
280
AI時代のUIはどこへ行く?
yusukebe
11
5.7k
testingを眺める
matumoto
1
130
奥深くて厄介な「改行」と仲良くなる20分
oguemon
1
270
Laravel Boost 超入門
fire_arlo
2
180
AIコーディングAgentとの向き合い方
eycjur
0
250
Design Foundational Data Engineering Observability
sucitw
2
130
Claude Codeで挑むOSSコントリビュート
eycjur
0
190
The Past, Present, and Future of Enterprise Java
ivargrimstad
0
300
AI OCR API on Lambdaを Datadogで可視化してみた
nealle
0
220
複雑なドメインに挑む.pdf
yukisakai1225
5
920
Featured
See All Featured
Why Our Code Smells
bkeepers
PRO
339
57k
How to Think Like a Performance Engineer
csswizardry
26
1.9k
Designing for Performance
lara
610
69k
What's in a price? How to price your products and services
michaelherold
246
12k
Faster Mobile Websites
deanohume
309
31k
Navigating Team Friction
lara
189
15k
Being A Developer After 40
akosma
90
590k
I Don’t Have Time: Getting Over the Fear to Launch Your Podcast
jcasabona
33
2.4k
Statistics for Hackers
jakevdp
799
220k
Keith and Marios Guide to Fast Websites
keithpitt
411
22k
How To Stay Up To Date on Web Technology
chriscoyier
790
250k
GraphQLとの向き合い方2022年版
quramy
49
14k
Transcript
Understanding Kotlin Multiplatform HyunWoo Lee Android/React Native Engineer, Viva Republica(Toss)
Organizer, GDG Korea Android/Kotlin User Groups Seoul Kotlin Multiplatform: Theory and Practice
2023.12 GDG Devfest Incheon
Kotlin Multiplatform
Kotlin Multiplatform Is it stable?
Kotlin Multiplatform Is it widely used?
Kotlin Multiplatform
Google I/O Extended 25 Google Docs Google Docsח iOS ജ҃ীࢲ
KMPܳ ഝਊೞҊ णפ. ӝઓ ٘৬ ࠺Ү೮ਸ ٸ ࢿמ ରо ѱ ա ঋҊ য়۰ ࠁ ؊ જ ҃ب णפ.
Google I/O Extended 25 উ٘۽٘ ٘о ࢿػ ࢚ടীࢲ ࡅܰѱ iOSীب
ਊೞӝ ਤ೧ ࠺ૉפझ ۽ਸ ҕਬೡ ࣻ ח KMPܳ ఖ೮णפ. Duolingo
Kotlin Multiplatform, Is it good?
Google I/O Extended 25 Advantage of KMP ֎౭࠳ ӝמਸ ࢿמ
ೞ হ Ӓ۽ Virtual Machine ҅க হয ࢿػ ٘о ۖಬ ֎౭࠳ ٘۽ ஹੌؾפ. ੋ ٘ ݃Ӓۨ࣌ оמ ֎౭࠳ ٘۽ ஹੌ غӝী ӝઓ ٘ب ഝਊೡ ࣻ Ҋ ܳ ഝਊ೧ࢲ ࠗ࠙ ਊ, ਊ оמפ. ٘ ࢎਊࢿҗ ࢎਊ ҃ ੌҙࢿ زੌೠ ٘߬झܳ ৈ۞ ۖಬী ҕਬо оמೞৈ ٘ ࢎਊࢿਸ ֫ੌ ࣻ Ҋ ী ٮۄ ۖಬী ޖҙೞѱ زੌೠ ҃ਸ ઁҕೡ ࣻ णפ.
Google I/O Extended 25 01 ࢎਊীѱ “જ” ҃ਸ ઁҕ೧ ࣻ
যঠೠ. 02 ۨਕܳ ഝਊೠ জٜ दীࢲ જ Ѿҗܳ ࠁৈঠ ೠ 03 ೧ ӝࣿਸ ӝ߈ਵ۽ ࢿҕੋ ழܻযܳ ऺ ޙоٜ যঠೠ. Good Framework? KMPח ֎౭࠳ জٜҗ زੌೠ ࢿמਵ۽ ӝמਸ ҳഅೡ ࣻ ٘߬झܳ ҕਬೞҊ ѐߊ दрਸ ױ୷ೞৈ दী ࡅܰҊ উਵ۽ ઁಿਸ ࢶࠁੌ ࣻ ӝઓ Kotlin, Android ޙоٜਸ ഝਊೡ ࣻ
Let’s start! Kotlin Multiplatform
୭नചػ Kotlin Multiplatform మ݁ ࢎਊ ೧ࢲ KMP/CMP জ ઁ оמ
Android Studio
୭नചػ Kotlin Multiplatform మ݁ ࢎਊ ೧ࢲ KMP/CMP জ ઁ оמ
Android Studio
Kotlin Multiplatform Shared Module మ݁ ୶о Android Studio
ӒܻҊ Gradle ٘ܳ झਸ਼ ࠁݶ Target? sourceSet? binaries? framework? kotlin
{ targets .filterIsInstance<KotlinNativeTarget>() .forEach { target -> target.binaries { framework { baseName = "Snup" isStatic = true } } } sourceSets { androidMain.dependencies { implementation(compose.preview) implementation(libs.androidx.activity.compose) } commonMain.dependencies { implementation(projects.feature.preview) implementation(libs.androidx.lifecycle.viewmodel) implementation(libs.androidx.lifecycle.runtimeCompose) implementation(libs.androidx.navigation.compose) implementation(libs.kotlinx.serialization.json) } commonTest.dependencies { implementation(libs.kotlin.test) } } }
Understanding Kotlin Multiplatform Project
ӝࠄਵ۽ • App Module • ৈ۞ѐ subproject(Library Module) ۽ ҳࢿؽ
Android ۽ં ҳࢿ
۽ં ٘ܳ ஹੌೡ ࢚ ఋѶਸ ࢶ ࣗझ ٘ܳ ۖಬ р
ҕਬೡ ࣻ ب۾ ҳࢿ Kotlin Multiplatform ۽ં ҳࢿ
build.gradle plugins { id(“org.jetbrains.kotlin”) id(“com.android.library”) } android { … }
kotlin { … }
build.gradle plugins { id(“org.jetbrains.kotlin.multiplatform”) id(“com.android.kotlin.multiplatform.library”) } kotlin { … }
public fun org.gradle.api.Project.kotlin( configure: org.gradle.api.Action<org.jetbrains.kotlin.gradle.dsl .KotlinAndroidProjectExtension> ): kotlin.Unit { /*
compiled code */ }
public fun org.gradle.api.Project.kotlin( configure: org.gradle.api.Action<org.jetbrains.kotlin.gradle.dsl .KotlinMultiplatformExtension> ): kotlin.Unit { /*
compiled code */ }
• যڃ ۖಬ ই౭ಂܳ ࢤࢿೡ Ѫੋ ೞח Ѫ •
۽ ܴਸ ࠢੌ ࣻب Ҋ ۖಬ ߹۽ ৈ ۞ѐ ఋӥਸ ೡ ࣻ Targets
• Kotlin Toolchainীࢲ ؽ • ٘о جইоח पੋ ജ҃ਸ
• example) iOSSimulatorArm64 Platform
plugins { … } android { namespace = “io.google.extended.busan” compileSdk
= 35 // … } kotlin { … }
plugins { … } kotlin { androidLibrary { namespace =
“io.google.extended.busan” compileSdk = 35 } iosX64 { … } }
Google I/O Extended 25 https://www.jetbrains.com/help/kotlin-multiplatform-dev/ multiplatform-hierarchy.html#manual-configuration
• ஹੌ җীࢲ ܻغח Kotlin ࣗझ ੌ, ઓࢿ, ܻࣗझ ҙ۲
ࠁٜਸ ೞח ҕр • ܲ Source Setী ઓ ҙ҅ܳ ࢸ೧ ٘ ܳ ҕਬೡ ࣻ Ҋ ਃೠ ҃ ழझథ ࣗझࣇਸ ೡ ࣻ Source Sets
kotlin { sourceSets { commonMain.dependencies { … } wasmJsMain {
dependencies { implementation(libs.kotlinx.immutable) } } val nonWasmJsMain by creating { dependsOn(commonMain.get()) } appleMain { dependsOn(nonWasmJsMain) } desktopMain { dependsOn(nonWasmJsMain) } androidMain { dependsOn(nonWasmJsMain) } } }
kotlin { sourceSets { commonMain.dependencies { … } wasmJsMain {
dependencies { implementation(libs.kotlinx.immutable) } } val nonWasmJsMain by creating { dependsOn(commonMain.get()) } appleMain { dependsOn(nonWasmJsMain) } desktopMain { dependsOn(nonWasmJsMain) }
} val nonWasmJsMain by creating { dependsOn(commonMain.get()) } appleMain {
dependsOn(nonWasmJsMain) } desktopMain { dependsOn(nonWasmJsMain) } androidMain { dependsOn(nonWasmJsMain) } } }
val nonWasmJsMain by creating { dependsOn(commonMain.get()) } appleMain { dependsOn(nonWasmJsMain)
} desktopMain { dependsOn(nonWasmJsMain) } androidMain { dependsOn(nonWasmJsMain) }
Google I/O Extended 25 • ݽٕ ղীࢲ ࢶػ ݽٚ ݽٕীࢲ
ࢎਊغח ҕా ٘ܳ ࢿೞח ࣗझࣇੑפ. • ࢶػ ۖಬী ஹੌ ؼ ࣻ ח ٘ܳ ࢿೡ ࣻ݅ ਵݶ commonMainীࢲ ࢿೡ ࣻ णפ. • ݽٕী androidTarget, jvm݅ ࢸ೮ݶ, commonMainীࢲب jvm ఋѶ ٘ܳ ࢿೡ ࣻ णפ. What is “common”? Common ఋѶب, ۖಬب ইתפ.
Understanding Kotlin Multiplatform Publishing
Google I/O Extended 25 JAR/AAR • JVM & Android ࢚
• ӝઓҗ زੌೠ ߑध • Gradleীࢲ ࢎਊೣ Klib • JVM & Android ઁ৻ ఋѶ • Gradleীࢲ ࢎਊೣ XCFramework • iOS ਊ Binary format • Cocoapods/SPM(Swift Package Manager) ഝਊ ೞৈ ࢎਊೡ ࣻ Binary formats
plugins { id(“maven-publish”) } group = “io.google.extended.busan” version = “1.0.0”
publishing { repositories { maven { … } } }
Understanding Kotlin Multiplatform Publishing - iOS
plugins { … } kotlin { // androidLibrary { …
} iosX64 { binaries { framework { baseName = “NunuFramework” } } } build.gradle
Google I/O Extended 25 • ѐߊੌ ٸח ࠽٘ दী ѐߊੋ
Shared Module(KMP Module) ࠽٘ Ѿҗޛਸ জী ನೣೠ • ߓನܳ ೡ ٸীח Gradleীࢲ ۄ࠳۞ܻܳ ࢎਊೞח Ѫۢ Cocoapods, Swift Package Managerীࢲ ߉ਸ ࣻ ب۾ ৻ࠗ ࢲߡী ۨਕܳ ߓನ/ࢸೠ. ৈӝࢲ ੌө? ઁ݅ ೧֬ও iOS জী ֍ ঋও.
cd ${PROJECT_DIR}/path/to/project ./gradlew \ :yourSharedModule:embedAndSignAppleFram eworkForXcode Local Integration
Google I/O Extended 25 Swift Package Manager • Appleীࢲ ӂೞח
Binary package ߓನ ҙܻ ߑध • അ iOS ࢤక҅ Best Practice Apple ҕधੋ Package Manager
Google I/O Extended 25 Swift Package Manager • ./gradlew <your_shared>:assembleXCFramework
• XCFrameworkܳ .zipਵ۽ ݅ • Github Release৬ э ܻݽ ജ҃ী ৢ۰֬ח • Package.swift ੌਸ ࢿೠ • ৻ࠗ ۨನఠܻী Package.swift ੌਸ য֍ח How to deploy “framework”?
Google I/O Extended 25 CocoaPods • iOS ѐߊٜ SPM
ইצ CocoaPodsਸ ࢎਊೞҊ ݶ ఖ оמ • Gradle DSL۽ب ۄ࠳۞ܻ ߓನо оמೣ ઁח ҳध ػ ࢲ٘౭ ಁః ݒפ
Summary
Google I/O Extended 25 CodeLab - Get Started with Kotlin
Multiplatform CodeLab - Migrate existing apps to Room KMP
Thank You HyunWoo Lee Android/React Native Engineer, Viva Republica(Toss) Organizer,
GDG Korea Android/Kotlin User Groups Seoul Kotlin Multiplatform: Theory and Practice