Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Play with Kotlin
Search
yoppie
March 25, 2019
Technology
1
630
Play with Kotlin
Kotlinで遊ぶ
yoppie
March 25, 2019
Tweet
Share
More Decks by yoppie
See All by yoppie
AmperとFleetを使ったAndroidアプリ
yoppie
0
960
Androidエンジニアが Flutterでアプリを リリースするまでの苦悩
yoppie
0
540
Navigation Component 実践編
yoppie
1
280
FragmentContainerViewとは
yoppie
0
780
Recent tips collection
yoppie
0
1k
Distribute Android app updates with bitrise
yoppie
0
1.4k
EC2 using Lumen and DynamoDB and SNS
yoppie
1
280
sabotage
yoppie
1
970
Other Decks in Technology
See All in Technology
顧客の言葉を、そのまま信じない勇気
yamatai1212
1
350
プロポーザルに込める段取り八分
shoheimitani
1
230
30万人の同時アクセスに耐えたい!新サービスの盤石なリリースを支える負荷試験 / SRE Kaigi 2026
genda
4
1.3k
Webhook best practices for rock solid and resilient deployments
glaforge
1
290
Kiro IDEのドキュメントを全部読んだので地味だけどちょっと嬉しい機能を紹介する
khmoryz
0
180
GitHub Issue Templates + Coding Agentで簡単みんなでIaC/Easy IaC for Everyone with GitHub Issue Templates + Coding Agent
aeonpeople
1
220
20260208_第66回 コンピュータビジョン勉強会
keiichiito1978
0
130
2026年、サーバーレスの現在地 -「制約と戦う技術」から「当たり前の実行基盤」へ- /serverless2026
slsops
2
240
仕様書駆動AI開発の実践: Issue→Skill→PRテンプレで 再現性を作る
knishioka
2
640
プロダクト成長を支える開発基盤とスケールに伴う課題
yuu26
4
1.3k
Digitization部 紹介資料
sansan33
PRO
1
6.8k
Context Engineeringが企業で不可欠になる理由
hirosatogamo
PRO
3
570
Featured
See All Featured
How to audit for AI Accessibility on your Front & Back End
davetheseo
0
180
Measuring Dark Social's Impact On Conversion and Attribution
stephenakadiri
1
120
Being A Developer After 40
akosma
91
590k
Cheating the UX When There Is Nothing More to Optimize - PixelPioneers
stephaniewalter
287
14k
The Power of CSS Pseudo Elements
geoffreycrofte
80
6.2k
Improving Core Web Vitals using Speculation Rules API
sergeychernyshev
21
1.4k
エンジニアに許された特別な時間の終わり
watany
106
230k
Mind Mapping
helmedeiros
PRO
0
81
Bridging the Design Gap: How Collaborative Modelling removes blockers to flow between stakeholders and teams @FastFlow conf
baasie
0
450
RailsConf 2023
tenderlove
30
1.3k
Exploring anti-patterns in Rails
aemeredith
2
250
Responsive Adventures: Dirty Tricks From The Dark Corners of Front-End
smashingmag
254
22k
Transcript
KotlinͰ༡Ϳ
Facebook hi.kowaii.de / Twitter @yoppie_x Github yoshiya12X / Qiita yoppie_x
ϒϩά https://yoppiex.hatenablog.com/ yoppie
Kotlinͱͷग़ձ͍ ιϑτΣΞֶͷݚڀ AndroidΞϓϦͷιʔείʔυΛରͱ͍ͯͨ͠ ࣗͰͪΐͪ͜ΐ͜AndroidΞϓϦΛ࡞ͬͯͨ ֶ෦ େֶӃ
Kotlinͱͷग़ձ͍ KotlinΛॻ͖࢝ΊΔ (໊લ͕͔Θ͍͔ͬͨͷͰw) 20171݄
Kotlinͱͷग़ձ͍ ্ژ͠৽ଔͰαʔόʔαΠυΤϯδχΞʹͳΔ KotlinҾ͖ଓ͖झຯͰॻ͘ 20174݄
Kotlinͱͷग़ձ͍ GoogleIO Kotlin͕AndroidΞϓϦ։ൃͷओཁݴޠͱͳΔ 20175݄
Δ͔͠ͳ͍ ͜ͷϏοάΣʔϒʹ
ͪΌΜͱKotlinΛॻ͜͏ (ͱ͍͏͔༡΅͏)
KotlinͰ༡Ϳ(part1) μʔπϘʔυͱ࿈ܞͨ͠ DartsXͱ͍͏ΞϓϦΛͭͬͯ͘༡Ϳ 20176݄~10݄
None
None
KotlinͰ༡Ϳ(part1) ͪΐͪ͜ΐ͜Kotlin͞ΘΔ 201710݄~20184݄
KotlinͰ༡Ϳ(part2) GoogleIO ͜ͷ࣌ظʹͳΔͱ Android or KotlinͷษڧձΜʹͳΔ (ؾ͕͢Δ) 20185݄
ͬͱਂ͘۷ΓԼ͛Δ ༡ͼ͔ͨΛ͠Α͏
Kotlinͱ༡Ϳ(part2) ֤ࣾͷΤϯδχΞϒϩάΛ εϚχϡʔͬΆ͘ݟΒΕΔ EngineerBlogsΛ࡞(ਐߦத) 20186݄~ݱࡏ
DataBindingͱPicasso
͜Μͳ͜ͱ͋Γ·ͤΜ͔ DataBindingΛར༻͍ͯ͠ΔAndroidΞϓϦͰɺ PicassoGlideͰImageViewʹ ը૾Λද͍ࣔͤͨ͞
͜Μͳ͜ͱ͋Γ·ͤΜ͔ DataBindingΛར༻͍ͯ͠ΔAndroidΞϓϦͰɺ PicassoGlideͰImageViewʹ ը૾Λද͍ࣔͤͨ͞ BindingAdapter
XMLͷ αϯϓϧ
XMLͷ αϯϓϧ
Custom Binding KotlinͬΆ͘ImageViewͷ֦ுؔΛͬͯΈͨ
https://qiita.com/yoppie_x/items/ afcf582c083918c2c719
KotlinͱGson
KotlinͱGson૬ੑ͕ѱ͍ non-nullͳϓϩύςΟʹnull͕ ೖͬͯ͠·͏Մೳੑ
KotlinͱGson૬ੑ͕ѱ͍ Kotlinͷੑ্࣭id, name, imgnon-null img͕ͳ͍jsonΛparse͢Δ ྫ֎͕throw͞Εͣɺimgʹnull͕ೖΔ
MoshiΛ͏ Kotlin extension KotlinͷclassͷύʔεΛαϙʔτ nullͷ߹parse࣌ʹྫ֎͕throw͞ΕΔ build.gradle
Retrofit2ͱMoshiͷ࣮ྫ
https://qiita.com/yoppie_x/items/ bbc0ca7a4c8a4b29e141
KotlinͱRxBinding2
RxBinding2 • Jake Wharton࡞ • ViewͰͷΠϕϯτʹର༷ͯ͠ʑͳ݅ͳͲΛ ༩͠subscribe͢Δ͜ͱͰViewͰͷΞΫγϣ ϯΛ੍ޚ • Kotlin༷ʹ֦ு͞Ε͍ͯΔϥΠϒϥϦΛར༻
RxBinding2 • rxbinding-kotlin • rxbinding-recyclerview-v7-kotlin • rxbinding-appcompat-v7-kotlin • rxbinding-support-v4-kotlin •
rxbinding-design-kotlin • rxbinding-leanback-v17-kotlin
ಋೖ build.gradle
ಋೖ build.gradle -kotlin͕ඞཁ
rxbinding-kotlin OnClickListenerΑΓγϯϓϧ
rxbinding-recyclerview-v7-kotlin RecyclerViewͰεΫϩʔϧ͕Ұ൪Լ·Ͱ͍ͬͨΒ ϩʔυ͢Δ࣮
rxbinding-support-v4-kotlin Support-v4 LibraryͰಋೖͰ͖ΔViewʹର͢Δ ΞΫγϣϯΛ੍ޚ (ྫ)SwipeRefreshLayout
KotlinͰRxBinding2Λ ͬͯΈͨײ • ใ͕গͳ͍ͷ͕͖͍ͭ • ϝιουνΣʔϯͰ͔͚Δͷ͕͍͍ • Viewͷϓϩηεͷάϧʔϐϯά • Kotlinͷ֦ுؔ,
ଞͷRxܥͷϥΠϒϥϦͱ Έ߹ΘͤΔ͜ͱͰγϯϓϧʹͳΓͦ͏
https://qiita.com/yoppie_x/items/ c04974a346f7f5d4b413
݁
KotlinΧϫΠΠ
ΧϫΠΠਖ਼ٛ
Kotlinਖ਼ٛ
͜Ε͔Β KotlinͰ༡Ϳʂ