Yet Another KMP*

Transcript

1. YET ANOTHER KMP* *Kotlin Multiplatform Presentation
2. Kotlin Multiplatform Multiple targets using Kotlin compiler
3. Cross Compilation Compile on Host -> for Target Native Compilation Compile on Host -> for Host
4. Plugin Targets Source Sets Compilations
5. 1. Plugin plugins { kotlin("multiplatform") version "1.7.20" }
6. 2. Targets
7. Targets android() jvm() watchosArm64 { binaries { /* Export an unoptimized version */ this.DEBUG = true } } iosArm64 { binaries { /* Export an optimized version */ this.DEBUG = false } }
8. 3. Source Sets
9. Predefined Source Sets ------ Custom Source Sets
10. Predefined Source Sets kotlin { sourceSets { val commonMain by getting val commonTest by getting /* if we target jvm platform */ val jvmMain by getting val jvmTest by getting } }
11. Custom Source Sets kotlin { sourceSets { val commonMain by sourceSets.getting val iosX64Main by sourceSets.getting val iosArm64Main by sourceSets.getting val iosMain by sourceSets.creating { dependsOn(commonMain) iosX64Main.dependsOn(this) iosArm64Main.dependsOn(this) } } }
12. 4. Compilations Default Compilations Custom Compilations
13. https://kotlinlang.org/docs/multiplatform- configure-compilations.html
14. Default Compilations (JVM, JS, Native) main test
15. Default Compilations (Android) kotlin { android { publishLibraryVariants( "release", "debug" ) } }
16. Custom Compilations
17. kotlin { iosArm64 { /* Apple iOS on ARM64 platforms*/ } iosX64 { /* Apple iOS simulator on x86_64 platforms */ compilations { val old by compilations.creating { defaultSourceSet { languageSettings { languageVersion = "1.5" } } } tasks.register<Exec>("old") { println("Compiling for an old version") } } }
18. How do I build native code?
19. ./gradlew macosX64Binaries
22. ./gradlew linuxArm64Binaries
24. ./gradlew nativeBinaries (on macOS)
27. build/bin/native/releaseExecutable/yet_another_kmp.kexe
29. ./gradlew nativeBinaries (on Linux)
31. build/bin/native/releaseExecutable/yet_another_kmp.kexe
33. Compile on linux and execute it on macOS?
35. expect/actual
36. expect fun debugLog(message: String) // Android implementation actual fun debugLog(message: String) { Timber.d(message) } // JS implementation actual fun debugLog(message: String) { console.log(message) }
37. Useful KMP Compatible Libraries
38. Database SQLDelight https://cashapp.github.io/sqldelight/multiplatform_sqlite/
39. CREATE TABLE userTable ( id INTEGER PRIMARY KEY AUTOINCREMENT, authenticated INTEGER AS Boolean );
40. insertUser: INSERT INTO userTable( authenticated ) VALUES (?); deleteUser: DELETE FROM userTable WHERE id = : id;
41. Network Client Ktor https://ktor.io/docs/getting-started-ktor- client-multiplatform-mobile.html
42. class SharedNetworkClient( private val api: String ) { private val client = HttpClient() { defaultRequest { url("api") } } suspend fun getUser(): String { val response = client.get() return response.bodyAsText() } }
43. Asynchronous Programming kotlinx.coroutines https://github.com/Kotlin/kotlinx.coroutines#multiplatform
44. Data Processing Okio https://square.github.io/okio/multiplatform/
45. Date Time kotlinx-datetime https://github.com/Kotlin/kotlinx- datetime#using-in-your-projects
46. Serialization kotlinx.serialization https://github.com/Kotlin/kotlinx.serialization#multiplatform- common-js-native
47. Dependency Injection koin https://github.com/InsertKoinIO/koin Kodein https://github.com/kosi-libs/Kodein
48. MVVM Architecture modo-mvvm https://github.com/icerockdev/moko- mvvm
49. MVI Architecture MVIKotlin https://github.com/arkivanov/MVIKotlin
50. State Machine FlowRedux https://freeletics.github.io/FlowRedux/
51. Logging Kermit https://github.com/touchlab/Kermit
52. Conclusions
53. Shared codebase knowledge
54. Shared bugs features
55. Shared unit tests
56. Shared developer effort* *In a parallel universe
57. Shared layers
58. Shared language
59. Shared transition
60. Shared solutions to shared problems
61. Where To Start https://kotlinlang.org/docs/multiplatform- dsl-reference.html
62. Where To Start https://github.com/icerockdev https://github.com/touchlab https://github.com/joreilly
63. Where To Start https://github.com/Kotlin/kmm-production-sample https://github.com/VictorKabata/Notflix https://github.com/oianmol/SlackComposeMultiplatform
64. Where To Stalk Me https://androiddev.social/@ilker https://github.com/ilkeraslan https://www.polywork.com/ilkeraslan https://www.linkedin.com/in/aslanilker/