Kotlin Multiplatform – Sharing is caring!

Cross-platform frameworks are trending these days especially on mobile. Few of these try to support both Android and iOS platforms with a single framework, which comes with a lot of challenges due to lack of tooling support and flexibility. On the other hand, Kotlin Multiplatform allows us to share true common code across platforms and lets the platform SDKs to take care of platform specific concerns.

In this talk, I will walk through how Kotlin Multiplatform modules can be used to implement common code once and target different platforms like web, Android, iOS or a desktop app; what the current state of art is; And it’s limitations.

Transcript

1. Multiplatform Sharing is Caring! Sunitha Burri
2. Pragmatic
3. Concise Open Source Statically Typed Object-oriented + Functional programming features Tool Friendly Easy to adapt
8. Official Programming Language on Android
9. Android Server Desktop Kotlin/JVM Kotlin/JS Kotlin/Native Web Cloud iOS macOS Linux Windows Common Code
10. Sharing code between platforms : JVM, Android, JavaScript, iOS, Linux, Windows, Mac and even embedded systems like STM32 Multiplatform
11. Share as much code as needed, yet access platform APIs!
12. Common Module iS JS Platform Module Target App Platform Independent Platform Specific App
13. Common Module iS JS Platform Module Target App
14. Common Module iS JS Platform Module Target App Android iOS
15. Common Module iS JS Platform Module Target App Platform Independent Platform Specific App
16. Kotlin Multiplatform for Android & iOS
24. Kotlin/Native target presets androidNativeArm32 and androidNativeArm64 for Android NDK iosArm32, iosArm64, iosX64 for iOS linuxArm32Hfp, linuxMips32, linuxMipsel32, linuxX64 for Linux macosX64 for MacOS mingwX64 for Windows wasm32 for WebAssembly
30. 2 2 1 1
34. Install Command line tools xcode-select --install
38. Common Module JVM Native Framewo rk Xcode-Framework
40. Takeaways Kotlin Multi platform is still an experimental feature Painful to setup a project Ktor, kotlinx.serialization Use a sample instead Conference apps Best part - Incremental approach
41. Common Module Android Module iOS Module
42. Thanks!