Pragmatic Code Sharing with Kotlin Multiplatform (Simonyi 2024)

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Kotlin Multiplatform Kódmegosztás pragmatikusan Braun Márton Developer Advocate JetBrains

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iOS Android Desktop Web Server

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iOS Android Desktop Web Server

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kotl.in/kmp-case-studies

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Projekt kezdete

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Projekt kezdete Kotlin/JVM .kt .class Java .java .class

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Nyilvános bejelentés Projekt kezdete Open source Kotlin/JVM .kt .class Java .java .class

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Nyilvános bejelentés Projekt kezdete Open source Kotlin/JVM .kt .class Kotlin 1.0

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Kotlin 1.0 Nyilvános bejelentés Projekt kezdete Open source JavaScript Kotlin/JVM .kt .class Kotlin/JS .kt .js

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Kotlin 1.0 Nyilvános bejelentés Projekt kezdete Open source Native JavaScript Kotlin/JVM .kt .class Kotlin/Native .kt .klib|.kexe Kotlin/JS .kt .js

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Kotlin 1.0 Nyilvános bejelentés Projekt kezdete Open source Native JavaScript KMP stable

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Kotlin 1.0 Nyilvános bejelentés Projekt kezdete Open source Native JavaScript KMP stable Wasm Kotlin/JVM .kt .class Kotlin/Native .kt .klib|.kexe Kotlin/JS .kt .js Kotlin/Wasm .kt .wasm

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Jetpack KMP Kotlin first Java + Kotlin Kotlin 1.0 Nyilvános bejelentés Projekt kezdete Open source Native JavaScript KMP stable Wasm

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iOS Android Desktop +

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Desktop + Android iOS .kt .kt .class .framework

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iOS .class .framework Desktop + Android .kt .kt

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Common .kt .kt

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.kt .kt .kt .kt Android Desktop iOS Common

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.kt .kt .kt .kt Android Desktop iOS Common

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.kt .kt .kt .kt Android Desktop iOS Common

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.kt .kt .kt Android Desktop iOS Common .kt

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.kt .kt .kt .kt Android Desktop iOS Common

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.kt .kt .kt Android Desktop iOS Common class Person(val name: String, var age: Int) fun greet(person: Person) { println("Hello, ${person.name}") }

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.kt .kt .kt Android Desktop iOS Common fun List.duplicates(): Map { return map { it.name.substringBefore(" ") } .groupingBy { it } .eachCount() .filter { (name, count) -> count > 1 } }

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Android Desktop iOS actual Common expect actual actual

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Android Desktop iOS Common expect actual actual actual

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Android Desktop iOS Common fun getPlatform(): String expect actual actual actual

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Android Desktop iOS Common fun getPlatform(): String fun getPlatform(): String = "Java ${System.getProperty("java.version")}" expect actual actual actual

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Android Desktop iOS Common fun getPlatform(): String fun getPlatform(): String = "Java ${System.getProperty("java.version")}" fun getPlatform(): String = "Android ${Build.VERSION.SDK_INT}" expect actual actual actual

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Android Desktop iOS Common fun getPlatform(): String fun getPlatform(): String = "Java ${System.getProperty("java.version")}" fun getPlatform(): String = "iOS ${UIDevice.currentDevice.systemVersion}" fun getPlatform(): String = "Android ${Build.VERSION.SDK_INT}" expect actual actual actual

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Multiplatform libraries

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github.com/terrakok/kmp-awesome

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.kt .kt .kt Android Desktop iOS Common import io.ktor.client.* suspend fun loadHtml(): String { val client = HttpClient() val response = client.get("https://kotlinlang.org") return response.body() }

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Shared logic

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Shared logic Swing Desktop logic Android Views Android logic SwiftUI iOS logic

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Shared logic Swing Desktop logic Android Views Android logic SwiftUI iOS logic

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Shared logic Swing Desktop logic Android Views Android logic SwiftUI iOS logic

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Compose Multiplatform jb.gg/compose

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Compose Multiplatform jb.gg/compose

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Swing Desktop logic Android Views Android logic SwiftUI iOS logic Shared logic

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Desktop logic Android logic iOS logic Shared logic Shared UI Compose Multiplatform

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Desktop logic Android logic iOS logic Shared logic Shared UI Compose Multiplatform Swing Android Views SwiftUI

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Preview

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Kotlin alapú szoftverfejlesztés VIAUAV41 Free Educational Licenses jb.gg/edulicense Kotlin Multiplatform jb.gg/kmp Compose Multiplatform jb.gg/compose Fleet jb.gg/fleet Kotlin Multiplatform Kódmegosztás pragmatikusan zsmb.co/talks Braun Márton marton@jetbrains.com