Said Tahsin Dane_Tobias Heine - Droidcon (Code) Sharing is caring - An Introduction to Kotlin Multiplatform projects

Transcript

1. (Code) Sharing is caring An Introduction to Kotlin Multiplatform Projects Said Tahsin Dane Tobias Heine
2. Why sharing code? Costs Quality Sharing code within the company Feature Teams
4. Why is sharing logic difficult?
8. How can you fix this ?
10. “The delivery mechanism is an annoying detail”
11. “Screaming Architecture”
12. Kotlin Multiplatform Project JVM out of the box JS kotlinjs Native Kotlin/Native
13. apply plugin: 'org.jetbrains.kotlin.platform.common' dependencies { compile "org.jetbrains.kotlin:kotlin-stdlib-common:$kotlin_version" testCompile "org.jetbrains.kotlin:kotlin-test-common:$kotlin_version" testCompile "org.jetbrains.kotlin:kotlin-test-annotations-common:$kotlin_version" } Kotlin Multiplatform Project - Common
14. apply plugin: 'kotlin-platform-jvm' dependencies { compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version" expectedBy project(":data-common") expectedBy project(":io-common") testCompile "org.jetbrains.kotlin:kotlin-test-junit:$kotlin_version" testCompile "org.jetbrains.kotlin:kotlin-test:$kotlin_version" } Kotlin Multiplatform Project - Common JVM
15. apply plugin: 'kotlin' apply plugin: 'application' dependencies { compile project(':common-jvm') compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version" compile 'no.tornado:tornadofx:1.7.14' testCompile "org.jetbrains.kotlin:kotlin-test-junit:$kotlin_version" testCompile "org.jetbrains.kotlin:kotlin-test:$kotlin_version" } mainClassName = 'com.novoda.gol.GameOfLife' Kotlin Multiplatform Project - Desktop Client
16. apply plugin: 'kotlin-platform-android' apply plugin: 'com.android.application' dependencies { compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version" expectedBy project(":common") testCompile "org.jetbrains.kotlin:kotlin-test-junit:$kotlin_version" testCompile "org.jetbrains.kotlin:kotlin-test:$kotlin_version" } Kotlin Multiplatform Project - Android Platform
17. Kotlin Multiplatform Project - Expected/Actual Common JVM
18. Game of Life
19. expect class GameLoop { fun startWith(intervalMs: Int, onTick: () -> Unit) fun stop() fun isLooping(): Boolean } GameLoop - Common
20. actual class GameLoop { private var gameLoop: Disposable? = null actual fun startWith(intervalMs: Int, onTick: () -> Unit) { gameLoop = Flowable.interval(intervalMs.toLong(), TimeUnit.MILLISECONDS) .subscribe { onTick() } } actual fun stop() = gameLoop!!.dispose() actual fun isLooping() = gameLoop != null } GameLoop - JVM
21. actual class GameLoop { private var gameloop: Int? = null actual fun startWith(intervalMs: Int, onTick: () -> Unit) { gameloop = window.setInterval({ onTick() }, intervalMs) } actual fun stop() = window.clearInterval(gameloop!!) actual fun isLooping() = gameloop != null } GameLoop - JS
22. actual class GameLoop { private var gameloop: NSTimer? = null actual fun startWith(intervalMs: Int, onTick: () -> Unit) { gameloop = NSTimer(NSDate(), 0.5, true, { onTick() }) NSRunLoop.currentRunLoop().addTimer(gameloop!!, NSRunLoopCommonModes) } actual fun stop() = gameloop!!.invalidate() actual fun isLooping() = gameloop != null } GameLoop - Kotlin/Native
23. apply plugin: 'konan' konan.targets = ['iphone', 'iphone_sim'] konanArtifacts { framework('KotlinGameOfLife') { enableMultiplatform true enableDebug true } } dependencies { expectedBy project(':common') } Kotlin/Native Gradle Plugin
24. Kotlin/Native AppCode Plugin
25. Kotlin/Native AppCode Plugin
26. What else did we share? Entities Models Presentation Layer Passive Views What is left for platform-clients?
27. Multiplatform Libs are coming! K/N Coroutines are coming - slowly! HttpClient Mocking library Sqlite for Kotlin multiplatform Reagent
28. What is missing for v1.0 ? Multithreading HTTP Reactive Code Caching (Better) testing support Third party SDK’s (ads, tracking, ...)
29. References Code: https://github.com/novoda/spikes/tree/master/game-of-life-mul tiplatform Blog posts: https://blog.novoda.com/introduction-to-kotlin-multiplatform/ https://blog.novoda.com/kotlin-goes-ios/
30. Thanks for listening! Any Questions? Tahsin & Tobi