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KotlinConf 2017 Keynote
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kobito-kaba
November 14, 2017
Programming
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KotlinConf 2017 Keynote
KotlinConf 2017のKeynoteの内容をざっくりとまとめました
kobito-kaba
November 14, 2017
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Transcript
KotlinConf Keynote Yahoo! JAPAN / 森 洋之
About me Yahoo! JAPAN Android黒帯 (こういうところで話す仕事) ヤフオク!のAndroid / iOS / バックエンド担当
Keynote #1
Kotlin/Anywhere
None
None
None
None
Kotlin/Anywhere
Server Android Browser Kotlin/JVM Kotlin/JVM Kotlin/JS
Kotlin & Server
JVM Server • パワフルなJVM • 既存のライブラリが全て使用可能 • Null Pointer Exceptionの排除
Coroutine fun onClick() = launch(UI) { val response = async(CommonPool)
{ Repository.getTimeline() } showTimeline(response.await()) } 非同期処理をかんたんに、コールバック地獄もなしに、書ける
• 100% KotlinのWebフレームワーク • 100% 非同期 • Coroutines from the
ground up
experimental != unstable
Use. Coroutines. Now
Kotlin & Browser
Kotlin/JS JavaScript Moduleのサポート dynamic Type Definitely Typed Header
Kotlin/JS React Demo(ありません) goo.gl/YkYfk3
Kotlin & Android
None
2.5x Google Playにアップロードされている Kotlinを使用したアプリ
17% Kotlinを使用するAndroid Studio プロジェクト
Android Studio 3.0 Android Support Library Annotations Android Kotlin Guides
Android Kotlin Documentation
Android Studio 3.0 • Kotlin Pluginが同梱 • Kotlin Lintサポート •
Kotlinプロジェクトテンプレート
Android Support Library • will support Kotlin Annotations from 27.0.0
goo.gl/knwckS Android Kotlin Guide
Android Kotlin Docs & Samples goo.gl/UWKfnc
Multiplatform Projects
Server Android Browser Kotlin/JVM Kotlin/JVM Kotlin/JS
None
*.class *.js *.class *.js
共通のロジック プラットフォームに 依存した ロジック プラットフォームに 依存した ロジック
actual external class Date { … actual fun getFullYear(): Int
… } expect class Date() { … fun getFullYear(): Int … } common actual class Date { private val calendar: Calendar … actual fun getFullYear() = calendar[YEAR] … } JVM JS
fun Pair<Date, Date>.toReadableString(): String { … if (from.getDate() != to.getDate()
|| from.getMonth() != to.getMonth() || from.getFullYear() != to.getFullYear()) { … } … } common
Server Android Browser Kotlin/JVM Kotlin/JVM Kotlin/JS
Server Android Browser Kotlin/JVM Kotlin/JVM Kotlin/JS iOS Kotlin/Native
Kotlin & iOS
Native Binary LLVM
Kotlin/Native • iOS • macOS • Windows • Linux •
Android NDK • WebAssembly
Server Android Browser Kotlin/Native Kotlin/Native Kotlin/Native iOS Kotlin/Native
Sample goo.gl/AQkK6S
Kotlin/Anywhere
Keynote #2
Party Keynote
What is a “Party Keynote”
None
None
None
None
まとめ
• Kotlinの利用は爆発的に伸びている • Coroutine使おう • どこでもKotlinを!