The document discusses Kotlin Multiplatform and how it allows sharing code across platforms like Android, iOS, JVM and JavaScript. It explains that Kotlin Multiplatform uses expected and actual declarations to abstract platform-specific code and share common code. While promising for code reuse, it cautions that Kotlin Multiplatform is still alpha and may not be ready for all production environments depending on the specific needs and platform integration required. Developers are advised to communicate with platform teams.

1. fun kotlinMultiplatform()
Harry Android Developer

2. index
[0] What is Kotlin Multipla

3. tf
orm
[1] How it works
[2] How to handle pla

4. tf
orm
[1] How it works
[2] How to handle pla

5. tf
orm
[1] How it works
[2] How to handle pla
tf
orm speci
fi
c library or SDK
[3] Conclusion : Is it ready for production?

6. index
[0] What is Kotlin Multipla
tf
orm
[1] How it works
[2] How to handle pla
tf
orm speci
fi
c library or SDK
[3] Conclusion : Is it ready for production?

7. What is Kotlin Multipla
tf
orm?

8. Kotlin suppo
rt
s…
Kotlin / JVM
Kotlin / JS
Kotlin / Native

9. Kotlin suppo
rt
s…
Kotlin / JVM
Kotlin / JS
Kotlin / Native

10. Kotlin suppo
rt
s…
Kotlin / JVM
Kotlin / JS
Kotlin / Native

11. Kotlin suppo
rt
s…
Kotlin / JVM
Kotlin / JS
Kotlin / Native

12. How it works
Basically Kotlin/JVM, JS, Native in one Project
But can share single common codes
How?

13. How it works
Basically Kotlin/JVM, JS, Native in one Project
But can share single common codes
How?

14. How it works
Basically Kotlin/JVM, JS, Native in one Project
But can share single common codes
How?

15. How it works
Basically Kotlin/JVM, JS, Native in one Project
But can share single common codes
How?

16. How it works

17. android ios server web
commonMain
androidMain iosMain serverMain webMain
shared
expected
actual

18. android ios server web
commonMain
androidMain iosMain serverMain webMain
shared
expected
actual

19. android ios server web
commonMain
androidMain iosMain serverMain webMain
shared
expected
actual

20. expect fun getPlatformName(): String
// commonMain
actual fun getPlatformName() = “iOS"
// iosMain
actual fun getPlatformName() = “Android”
// androidMain

21. expect fun getPlatformName(): String
// commonMain
actual fun getPlatformName() = “iOS"
// iosMain
actual fun getPlatformName() = “Android”
// androidMain

22. expect fun getPlatformName(): String
// commonMain
actual fun getPlatformName() = “iOS"
// iosMain
actual fun getPlatformName() = “Android”
// androidMain

23. Pla
tf
orm Speci
fi
c Lib/SDK

24. When pla
tf
orms impo
rt
Kotlin Coroutines
Android / JVM : Of course I can use coroutines.
iOS : WT* is this
How?

25. When pla
tf
orms impo
rt
Kotlin Coroutines
Android / JVM : Of course I can use coroutines.
iOS : WT* is this
How?

26. When pla
tf
orms impo
rt
Kotlin Coroutines
Android / JVM : Of course I can use coroutines.
iOS : WT* is this
How?

27. When pla
tf
orms impo
rt
Kotlin Coroutines
Android / JVM : Of course I can use coroutines.
iOS : WT* is this
How?

28. Kotlin Swift
interface protocol
constructor/ create Initializer
suspend -> completionHandler:
@Throws fun throws
companion member <- Class method or property
null nil
Unit return type Void
String NSMutableString
List Array
MutableList NSMutableArray
MutableSet NSMutableSet
Map Dictionary
MutableMap NSMutableDictionary
Mapping

29. SPM, Cocoapods or npm

30. dependencies {
implementation(npm("react", "16.13.0"))
implementation(npm("react-dom", "16.13.0"))
}

31. plugins {
kotlin("multiplatform")
kotlin("native.cocoapods")
}

32. kotlin {
android()
jvm()
iosX64(“ios")
cocoapods {
...
pod("GooglePlaces")
}
...
}

33. Sho
rt
Demo

34. Conclusion

35. so… Is it ready for production?
I think yes. but it is alpha
Depends on development environment & rules
Should communicate with each pla

38. tf
orm developers
in Qanda...?

39. so… Is it ready for production?
I think yes. but it is alpha
Depends on development environment & rules
Should communicate with each pla
tf
orm developers
in Qanda...?

40. Thank you!
github.com/HarryTylenol/Multipla
tf
ormAssemble
Q & A

41. Ref
kotlinlang.org/docs
github.com/joreilly/PeopleInSpace