Intro to Kotlin/Native and Multi-platform Projects

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1. Введение в Kotlin/Native и мультиплатформенные проекты Дмитрий Горбунов Lead Android Developer
2. Native vs Cross-platform
3. Multi-platform Server Kotlin/JVM iOS Kotlin/Native Android Kotlin/JVM Browser Kotlin/JS Common code
4. Hello, Kotlin/Native fun main(args: Array<String>) { println("Hello, Kotlin/Native!") }
5. Kotlin/Native Kotlin Compiler LLVM .kt Intermediate Representation (IR) 10101 01010 10101
6. Kotlin/Native • Маленький размер рантайма (Hello World ~ 850 KB) • Встроенный GC • C Interop • Objective-C and Swift Interop
7. Kotlin/Native Target Platforms ❏ Windows (x86_64) ❏ Linux (x86_64, arm32, MIPS, MIPS little endian) ❏ MacOS (x86_64) ❏ iOS (arm32, arm64, x64) ❏ Android (arm32, arm64) ❏ STM32 ❏ WebAssembly (wasm32)
8. Kotlin/Native Binaries ➔ Executable file (*.kexe) ➔ Kotlin/Native library (*.klib) ➔ Apple framework (Obj-C framework) ➔ Dynamic library (*.so, *.dylib, *.dll) ➔ Static library
9. Platform-Specific Declarations // Common expect fun platformName(): String // Android actual fun platformName(): String { return "Android ${Build.VERSION.RELEASE}" } // iOS actual fun platformName(): String { return UIDevice.currentDevice.systemName() + " " + UIDevice.currentDevice.systemVersion }
10. Platform-Specific Declarations // Common expect fun platformName(): String // Android actual fun platformName(): String { return "Android ${Build.VERSION.RELEASE}" } // iOS actual fun platformName(): String { return UIDevice.currentDevice.systemName() + " " + UIDevice.currentDevice.systemVersion }
11. Multiplatform Module Common main expect class Bar fun foo(b: Bar) {} Android main actual class Bar {} iOS main actual class Bar {}
12. Multiplatform Project Android-приложение (Android Studio) iOS-приложение (Xcode) Мультиплатформенный модуль
13. Multiplatform Module
14. Multiplatform Module expect fun platformName(): String
15. Multiplatform Module import platform.UIKit.UIDevice actual fun platformName(): String { return UIDevice.currentDevice.systemName() + " " + UIDevice.currentDevice.systemVersion }
16. Multiplatform Module import android.os.Build actual fun platformName(): String { return "Android ${Build.VERSION.RELEASE}" }
17. Shared Code Android View Presenter Repository DTO iOS View Interactor Entity API DB SDK
18. Shared Code Android View Presenter Repository DTO iOS View Interactor Entity API DB SDK
19. Shared Code Android View Presenter Repository DTO iOS View Interactor Entity API DB SDK
20. Shared Code Android View Presenter Repository DTO iOS View Interactor Entity API DB SDK KTOR SQLDelight kotlinx serialization ?
21. Shared Code Android View ViewModel ? Repository DTO iOS View Interactor Entity API DB SDK KTOR SQLDelight kotlinx serialization ?
22. Issues • Multi-threaded coroutines https://github.com/Kotlin/kotlinx.coroutines/issues/462 • UI dispatcher for iOS https://github.com/Kotlin/kotlinx.coroutines/issues/470 • Kotlin Generics to Swift Generics https://github.com/JetBrains/kotlin-native/issues/2429 • Kotlinx.serialization https://github.com/Kotlin/kotlinx.serialization/issues/395
23. Links • Официальный туториал https://kotlinlang.org/docs/tutorials/native/mpp-ios-android.html • Семпл приложения под Android и iOS https://github.com/MobileUpLLC/Multiplatform-Sample • KotlinConf App - пример рабочего приложения от Jetbrains https://github.com/JetBrains/kotlinconf-app
24. Спасибо! Дмитрий Горбунов email: dg@mobileup.ru telegram: @dmdev Habr: https://habr.com/ru/users/dmdev/posts/ RxPM: https://github.com/dmdevgo/RxPM