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
Kotlin - Padrões e Boas Práticas
Search
Rafael Toledo
November 18, 2017
Programming
1
720
Kotlin - Padrões e Boas Práticas
Apresentada no DevFest Belo Horizonte 2017
Rafael Toledo
November 18, 2017
Tweet
Share
More Decks by Rafael Toledo
See All by Rafael Toledo
Gamedev com Kotlin Native
rafaeltoledo
0
79
Kotlin Multiplataforma: Compartilhando código entre Android e iOS
rafaeltoledo
0
290
Motion Layout
rafaeltoledo
1
130
Pipeline Android
rafaeltoledo
3
160
Android Architecture Components
rafaeltoledo
7
160
What's New in Kotlin 1.3
rafaeltoledo
0
150
An Overview of Multiplatform Kotlin
rafaeltoledo
2
120
Compartilhando Código com Kotlin Multiplataforma
rafaeltoledo
2
260
Android Assíncrono
rafaeltoledo
3
220
Other Decks in Programming
See All in Programming
JSONataを使ってみよう Step Functionsが楽しくなる実践テクニック #devio2025
dafujii
1
640
Processing Gem ベースの、2D レトロゲームエンジンの開発
tokujiros
2
130
RDoc meets YARD
okuramasafumi
4
170
Putting The Genie in the Bottle - A Crash Course on running LLMs on Android
iurysza
0
140
HTMLの品質ってなんだっけ? “HTMLクライテリア”の設計と実践
unachang113
4
2.9k
ユーザーも開発者も悩ませない TV アプリ開発 ~Compose の内部実装から学ぶフォーカス制御~
taked137
0
190
🔨 小さなビルドシステムを作る
momeemt
4
690
知っているようで知らない"rails new"の世界 / The World of "rails new" You Think You Know but Don't
luccafort
PRO
1
190
How Android Uses Data Structures Behind The Scenes
l2hyunwoo
0
480
プロパティベーステストによるUIテスト: LLMによるプロパティ定義生成でエッジケースを捉える
tetta_pdnt
0
4.1k
詳解!defer panic recover のしくみ / Understanding defer, panic, and recover
convto
0
250
MCPでVibe Working。そして、結局はContext Eng(略)/ Working with Vibe on MCP And Context Eng
rkaga
5
2.3k
Featured
See All Featured
Art, The Web, and Tiny UX
lynnandtonic
303
21k
Cheating the UX When There Is Nothing More to Optimize - PixelPioneers
stephaniewalter
285
14k
Fashionably flexible responsive web design (full day workshop)
malarkey
407
66k
The Straight Up "How To Draw Better" Workshop
denniskardys
236
140k
Optimizing for Happiness
mojombo
379
70k
How To Stay Up To Date on Web Technology
chriscoyier
790
250k
The Invisible Side of Design
smashingmag
301
51k
Code Review Best Practice
trishagee
71
19k
[RailsConf 2023] Rails as a piece of cake
palkan
57
5.8k
Refactoring Trust on Your Teams (GOTO; Chicago 2020)
rmw
35
3.1k
The Power of CSS Pseudo Elements
geoffreycrofte
77
6k
Building Adaptive Systems
keathley
43
2.7k
Transcript
None
None
None
None
None
None
None
None
None
User user = new User(); user.setName("Rafael Toledo"); // Obrigatório user.setEmail("
[email protected]
");
// Obrigatório user.setPhone("+55 11 99999-9999"); // Opcional
User user = new User.Builder("Rafael Toledo", "
[email protected]
") .phone("+55 11 99999-9999")
.build();
class User(val name: String, val email: String, val phone: String?
= null) User(name = "Rafael Toledo", email = "
[email protected]
")
class User(val name: String, val email: String, val phone: String?
= null) User(name = "Rafael Toledo", email = "
[email protected]
", phone = "+55 11 99999-9999")
taxCalculator { country = Tax.COUNTRY_BRAZIL period { from = date("2017-01-01")
to = date("2017-10-31") } type = Tax.TYPE_IRPF payment { type = Tax.PAYMENT_BANK_TRANSFER bank { agency = "1234" account = "012345-9" ...
None
fun ViewGroup.inflate(layoutRes: Int, attachToRoot: Boolean = false): View { return
LayoutInflater.from(context).inflate(layoutRes, this, attachToRoot) }
None
None
None
None
None
validateAddress(addressFrom(jsonNode)) validateAddress(jsonNode.toAddress()) private fun JsonNode.toAddress() = Address( getRequired("street").asText(), getRequired("town").asText(), get("postcode")?.asPostCode(),
getRequired("country").asCountryCode())
validateAddress(addressFrom(jsonNode)) validateAddress(jsonNode.toAddress()) private fun JsonNode.toAddress() = Address( getRequired("street").asText(), getRequired("town").asText(), get("postcode")?.asPostCode(),
getRequired("country").asCountryCode())
// Antes enableCheckbox(isFreeDelivery(addressFrom(jsonNode))) // Depois enableCheckbox(jsonNode.toAddress().isFreeDelivery())
// Antes if (userCanEditSubmission(currentUser, submission)) { ... } // After
if (currentUser.canEdit(submission)) { ... }
None
None
None
None
None
None
None
None
None
None
if (savedInstanceState != null) { ... } savedInstanceState?.let { ...
}
None
None
// Confuso if (value?.isTrue ?: false) { ... } //
Parece redundante, mas é mais claro! if (value?.isTrue == true) { ... }
None
None
None
None
None
None
None
None
None
None
None
None
None
None
@Deprecated("Use X instead") @Throws(ExceptionInInitializerError::class) fun relevantMethod() { ... }
None
// Em vez de apply plugin: "kotlin-android" apply plugin: "kotlin-android-extensions"
// Por que não... apply plugin: "org.jetbrains.kotlin.android" apply plugin: "org.jetbrains.kotlin.android.extensions" apply plugin: "org.jetbrains.kotlin.kapt"
None
None
None