Code sharing with Kotlin multi-platform

One IOS app, one android app and one web app. Three clients, three code bases implementing the same features (almost) and with three times the amount of bugs.
Not that bad. we are all doing it for years. But more and more companies are trying to unify the clients.
The kotlin's team came up with a solution that is for me the scenario with the less trade-offs. Use the tools you love but share what what is common.

Transcript

1. @soulesidibe Code sharing with Kotlin multi-platform Use the tools you love but share what is common
2. Agenda • Kotlin Multiplatform • A demo • Questions
3. Client Side development
4. Client Side development Android IOS Web
5. Client Side development Android IOS Web Java 6/7/8
6. Client Side development Android IOS Web Java 6/7/8 Kotlin
7. Client Side development Android IOS Web Java 6/7/8 Kotlin Objectif-C
8. Client Side development Android IOS Web Java 6/7/8 Kotlin Objectif-C Swift
9. Client Side development Android IOS Web Java 6/7/8 Kotlin Objectif-C Swift JavaScript
10. Client Side development Android IOS Web Java 6/7/8 Kotlin Objectif-C Swift JavaScript
11. Client Side development Android IOS Web
12. Client Side development Android IOS Web UI
13. Client Side development Android IOS Web UI BUSINESS LOGIC
14. Client Side development Android IOS Web UI BUSINESS LOGIC IO
15. Client Side development Android IOS Web UI BUSINESS LOGIC IO Backend
16. Client Side development Android IOS Web UI BUSINESS LOGIC IO Backend
17. Client Side development Android IOS Web UI BUSINESS LOGIC IO Backend
18. Client Side development Android IOS Web UI BUSINESS LOGIC IO Backend
19. Client Side development Android IOS Web UI BUSINESS LOGIC IO
20. Client Side development Android IOS Web UI IO UI UI IO IO Busines Busines Busines
21. Client Side development Android IOS Web UI IO UI UI IO IO Busines Busines Busines • 1 set of features • 3 teams / plate-forms supported • 3 Codebases/implementations • 3x the amount of issues
22. Client Side development Android IOS Web UI BUSINESS LOGIC IO
23. Client Side development Android IOS Web UI BUSINESS LOGIC IO
24. Client Side development Android IOS Web UI BUSINESS LOGIC IO
25. Client Side development • Fast to build apps • Hot Reload • Easy to learn • Js Ecosystem • New programming language • It’s not native
26. Kotlin Multiplatform
27. Android IOS Web UI BUSINESS LOGIC IO Kotlin Multiplatform • Modern Programming language by Jetbrains • Concise, Safe, Interoperable • Great tooling • Server side • Android default language • Kotlin Native (Windows, Mac, IOS, Linux, WA) • Web development (react, node js, etc)
28. Android IOS Web UI BUSINESS LOGIC IO Kotlin Multiplatform • Sharing Code Between Platforms
29. Android IOS Web UI BUSINESS LOGIC IO Kotlin Multiplatform • Sharing Code Between Platforms Kotlin Common K otlin/JV M K otlin/JS Kotlin/Native ByteCode JS C ode Native Code
30. Android IOS Web UI BUSINESS LOGIC IO Kotlin Multiplatform • Sharing Code Between Platforms Kotlin Common K otlin/JV M K otlin/JS Kotlin/Native ByteCode JS C ode Native Code
31. Android IOS Web UI BUSINESS LOGIC IO Kotlin Multiplatform • Sharing Code Between Platforms Kotlin Common K otlin/JV M K otlin/JS Kotlin/Native ByteCode JS C ode Native Code UI UI
32. Android IOS Web UI SPECIFIC CODE (if Needed) Kotlin Multiplatform • Sharing Code Between Platforms Kotlin Common K otlin/JV M K otlin/JS Kotlin/Native ByteCode JS C ode Native Code UI UI BUSINESS LOGIC IO
33. Android IOS Web Native UI Jetpack Compose SPECIFIC CODE (if Needed) Kotlin Multiplatform: Sharing Code Between Platforms • Sharing Code Between Platforms Kotlin Common K otlin/JV M K otlin/JS Kotlin/Native ByteCode JS C ode Native Code SWIFT UI, Objectif-C JS BUSINESS LOGIC IO
34. Android IOS Web Native UI Jetpack Compose SPECIFIC CODE (if Needed) Kotlin Multiplatform: Sharing Code Between Platforms • Sharing Code Between Platforms Kotlin Common K otlin/JV M K otlin/JS Kotlin/Native ByteCode JS C ode Native Code SWIFT UI, Objectif-C JS BUSINESS LOGIC IO .aar .jar .framework optimized js
35. Android IOS Web Native UI Jetpack Compose SPECIFIC CODE (if Needed) Kotlin Multiplatform: Sharing Code Between Platforms SWIFT UI, Objectif-C JS BUSINESS LOGIC IO
36. Android IOS Web Native UI Jetpack Compose SPECIFIC CODE (if Needed) Kotlin Multiplatform: Sharing Code Between Platforms SWIFT UI, Objectif-C JS BUSINESS LOGIC IO
37. Android IOS Web Native UI Jetpack Compose SPECIFIC CODE (if Needed) Kotlin Multiplatform: Sharing Code Between Platforms SWIFT UI, Objectif-C JS BUSINESS LOGIC IO
38. Android IOS Web Native UI Jetpack Compose SPECIFIC CODE (if Needed) Kotlin Multiplatform: Sharing Code Between Platforms SWIFT UI, Objectif-C JS BUSINESS LOGIC IO • Gradle build tool
39. Android IOS Web Native UI Jetpack Compose SPECIFIC CODE (if Needed) Kotlin Multiplatform: Sharing Code Between Platforms SWIFT UI, Objectif-C JS BUSINESS LOGIC IO • Gradle build tool
40. Android IOS Web Native UI Jetpack Compose SPECIFIC CODE (if Needed) Kotlin Multiplatform: Sharing Code Between Platforms SWIFT UI, Objectif-C JS BUSINESS LOGIC IO • Gradle build tool
41. Android IOS Web Native UI Jetpack Compose SPECIFIC CODE (if Needed) Kotlin Multiplatform: Sharing Code Between Platforms SWIFT UI, Objectif-C JS BUSINESS LOGIC IO • Gradle build tool
42. Android IOS Web Native UI Jetpack Compose SPECIFIC CODE (if Needed) Kotlin Multiplatform: Sharing Code Between Platforms SWIFT UI, Objectif-C JS BUSINESS LOGIC IO • Gradle build tool
43. Android IOS Web Native UI Jetpack Compose SPECIFIC CODE (if Needed) Kotlin Multiplatform: Sharing Code Between Platforms SWIFT UI, Objectif-C JS BUSINESS LOGIC IO • Gradle build tool StdLib Coroutines Serialization IO Date Doc
44. CALM DOWN. I WILL NOT LIVE CODING DEMO
45. Wrap up •Kotlin is a great programming language
46. Wrap up •Kotlin is a great programming language •Jetbrains is a great tooling company
47. Wrap up •Kotlin is a great programming language •Jetbrains is a great tooling company •Business logic writes once and runs everywhere
48. Wrap up •Kotlin is a great programming language •Jetbrains is a great tooling company •Business logic writes once and runs everywhere •Code sharing force you re-think your architecture
49. Wrap up •Kotlin is a great programming language •Jetbrains is a great tooling company •Business logic writes once and runs everywhere •Code sharing force you re-think your architecture •Performance
50. Wrap up •Still in experimental
51. Wrap up •Still in experimental •Limited number of multiplatform libs
52. Wrap up •Still in experimental •Limited number of multiplatform libs •Not great for prototyping
53. Wrap up •Still in experimental •Limited number of multiplatform libs •Not great for prototyping •Setup-build-deploy curve is tough for the firsts tries
54. Wrap up source : KotlinConf 2019 Keynote
55. Links kobiri.app/kotlinjs
56. Links kobiri.app/kotlinjs
57. Links kobiri.app/kmp_ios_and_android
58. Links kobiri.app/venkat_kotlin
59. Sources •https://www.jetbrains.com/lp/mobilecrossplatform/ •kobiri.app/kotlinconf2019 •kobiri.app/kotlinconf2018 •https://play.kotlinlang.org/hands-on/overview •https://github.com/soulesidibe/MultiplatformApp
60. Thank you! That’s it