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
Sponsored
·
Your Podcast. Everywhere. Effortlessly.
Share. Educate. Inspire. Entertain. You do you. We'll handle the rest.
→
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
970
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
550
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
全自動で回せ!Claude Codeマーケットプレイス運用術
yukyu30
3
150
LINEヤフーにおけるAI駆動開発組織のプロデュース施策
lycorptech_jp
PRO
0
370
【5分でわかる】セーフィー エンジニア向け会社紹介
safie_recruit
0
43k
OCI技術資料 : 外部接続 VPN接続 詳細
ocise
1
10k
名刺メーカーDevグループ 紹介資料
sansan33
PRO
0
1.1k
技術的負債の泥沼から組織を救う3つの転換点
nwiizo
4
430
Sansan Engineering Unit 紹介資料
sansan33
PRO
1
4k
LY Tableauでの Tableau x AIの実践 (at Tableau Now! - 2026-02-26)
yoshitakaarakawa
0
1.2k
問い合わせ自動化の技術的挑戦
recruitengineers
PRO
2
110
LLM活用の壁を超える:リクルートR&Dの戦略と打ち手
recruitengineers
PRO
1
200
Introduction to Sansan, inc / Sansan Global Development Center, Inc.
sansan33
PRO
0
3k
2026-02-25 Tokyo dbt meetup プロダクトと融合したCI/CD で実現する、堅牢なデータパイプラインの作り方
y_ken
0
160
Featured
See All Featured
Building Adaptive Systems
keathley
44
2.9k
The Curse of the Amulet
leimatthew05
1
9.4k
Organizational Design Perspectives: An Ontology of Organizational Design Elements
kimpetersen
PRO
1
620
Cheating the UX When There Is Nothing More to Optimize - PixelPioneers
stephaniewalter
287
14k
Optimizing for Happiness
mojombo
378
71k
We Are The Robots
honzajavorek
0
190
Unlocking the hidden potential of vector embeddings in international SEO
frankvandijk
0
190
Jess Joyce - The Pitfalls of Following Frameworks
techseoconnect
PRO
1
92
The innovator’s Mindset - Leading Through an Era of Exponential Change - McGill University 2025
jdejongh
PRO
1
110
Building Applications with DynamoDB
mza
96
6.9k
ReactJS: Keep Simple. Everything can be a component!
pedronauck
666
130k
Heart Work Chapter 1 - Part 1
lfama
PRO
5
35k
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