Pragmatic Code Sharing with Kotlin Multiplatform (Simonyi 2024)

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1. Kotlin Multiplatform Kódmegosztás pragmatikusan Braun Márton Developer Advocate JetBrains
2. iOS Android Desktop Web Server
3. iOS Android Desktop Web Server
4. kotl.in/kmp-case-studies
7. Projekt kezdete
8. Projekt kezdete Kotlin/JVM .kt .class Java .java .class
9. Nyilvános bejelentés Projekt kezdete Open source Kotlin/JVM .kt .class Java .java .class
10. Nyilvános bejelentés Projekt kezdete Open source Kotlin/JVM .kt .class Kotlin 1.0
11. Kotlin 1.0 Nyilvános bejelentés Projekt kezdete Open source JavaScript Kotlin/JVM .kt .class Kotlin/JS .kt .js
12. Kotlin 1.0 Nyilvános bejelentés Projekt kezdete Open source Native JavaScript Kotlin/JVM .kt .class Kotlin/Native .kt .klib|.kexe Kotlin/JS .kt .js
13. Kotlin 1.0 Nyilvános bejelentés Projekt kezdete Open source Native JavaScript KMP stable
14. 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
15. Jetpack KMP Kotlin first Java + Kotlin Kotlin 1.0 Nyilvános bejelentés Projekt kezdete Open source Native JavaScript KMP stable Wasm
16. iOS Android Desktop +
17. Desktop + Android iOS .kt .kt .class .framework
18. iOS .class .framework Desktop + Android .kt .kt
19. Common .kt .kt
20. .kt .kt .kt .kt Android Desktop iOS Common
21. .kt .kt .kt .kt Android Desktop iOS Common
22. .kt .kt .kt .kt Android Desktop iOS Common
23. .kt .kt .kt Android Desktop iOS Common .kt
24. .kt .kt .kt .kt Android Desktop iOS Common
25. .kt .kt .kt Android Desktop iOS Common class Person(val name: String, var age: Int) fun greet(person: Person) { println("Hello, ${person.name}") }
26. .kt .kt .kt Android Desktop iOS Common fun List<Person>.duplicates(): Map<String, Int> { return map { it.name.substringBefore(" ") } .groupingBy { it } .eachCount() .filter { (name, count) -> count > 1 } }
27. Android Desktop iOS actual Common expect actual actual
28. Android Desktop iOS Common expect actual actual actual
29. Android Desktop iOS Common fun getPlatform(): String expect actual actual actual
30. Android Desktop iOS Common fun getPlatform(): String fun getPlatform(): String = "Java ${System.getProperty("java.version")}" expect actual actual actual
31. 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
32. 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
33. Multiplatform libraries
34. github.com/terrakok/kmp-awesome
35. .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<String>() }
36. Shared logic
37. Shared logic Swing Desktop logic Android Views Android logic SwiftUI iOS logic
38. Shared logic Swing Desktop logic Android Views Android logic SwiftUI iOS logic
39. Shared logic Swing Desktop logic Android Views Android logic SwiftUI iOS logic
40. Compose Multiplatform jb.gg/compose
41. Compose Multiplatform jb.gg/compose
42. Swing Desktop logic Android Views Android logic SwiftUI iOS logic Shared logic
43. Desktop logic Android logic iOS logic Shared logic Shared UI Compose Multiplatform
44. Desktop logic Android logic iOS logic Shared logic Shared UI Compose Multiplatform Swing Android Views SwiftUI
45. Preview
53. 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