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
선언형 UI에서의 상태관리
Search
HyunWoo Lee
December 21, 2024
Programming
0
560
선언형 UI에서의 상태관리
GDG Devfest Songdo 2024에서 진행한 선언형 UI에서의 상태관리의 Speaker Deck입니다.
HyunWoo Lee
December 21, 2024
Tweet
Share
More Decks by HyunWoo Lee
See All by HyunWoo Lee
How Android Uses Data Structures Behind The Scenes
l2hyunwoo
1
610
Understanding Kotlin Multiplatform (Busan)
l2hyunwoo
0
52
Understanding Kotlin Multiplatform
l2hyunwoo
0
300
파급효과: From AI to Android Development
l2hyunwoo
0
250
선언형 UI를 학습할 때 알아둬야하는 키워드들
l2hyunwoo
0
460
Essential concepts to know when learning Declarative UI
l2hyunwoo
2
1.5k
React Native under the hood
l2hyunwoo
0
140
유연한 Composable 설계
l2hyunwoo
0
710
KotlinConf 2024 Global in South Korea Keynote
l2hyunwoo
0
140
Other Decks in Programming
See All in Programming
フロントエンド開発のためのブラウザ組み込みAI入門
masashi
5
2k
釣り地図SNSにおける有料機能の実装
nokonoko1203
0
140
The Past, Present, and Future of Enterprise Java
ivargrimstad
0
440
CSC305 Lecture 06
javiergs
PRO
0
250
Claude Agent SDK を使ってみよう
hyshu
0
1.2k
Server Side Kotlin Meetup vol.16: 内部動作を理解して ハイパフォーマンスなサーバサイド Kotlin アプリケーションを書こう
ternbusty
3
210
CSC305 Lecture 05
javiergs
PRO
0
220
Go言語はstack overflowの夢を見るか?
logica0419
0
380
monorepo の Go テストをはやくした〜い!~最小の依存解決への道のり~ / faster-testing-of-monorepos
convto
2
500
デミカツ切り抜きで面倒くさいことはPythonにやらせよう
aokswork3
0
250
エンジニアインターン「Treasure」とHonoの2年、そして未来へ / Our Journey with Hono Two Years at Treasure and Beyond
carta_engineering
0
330
品質ワークショップをやってみた
nealle
0
530
Featured
See All Featured
GitHub's CSS Performance
jonrohan
1032
470k
The Myth of the Modular Monolith - Day 2 Keynote - Rails World 2024
eileencodes
26
3.1k
Fireside Chat
paigeccino
40
3.7k
YesSQL, Process and Tooling at Scale
rocio
173
14k
KATA
mclloyd
PRO
32
15k
Visualizing Your Data: Incorporating Mongo into Loggly Infrastructure
mongodb
48
9.7k
For a Future-Friendly Web
brad_frost
180
10k
Agile that works and the tools we love
rasmusluckow
331
21k
Connecting the Dots Between Site Speed, User Experience & Your Business [WebExpo 2025]
tammyeverts
10
600
A better future with KSS
kneath
239
18k
RailsConf 2023
tenderlove
30
1.3k
CoffeeScript is Beautiful & I Never Want to Write Plain JavaScript Again
sstephenson
162
15k
Transcript
Incheon ࢶഋ UIীࢲ ࢚కҙܻ - Circuitҗ Rinਸ बਵ۽ അ Android/React
Native Developer, Viva Republica(Toss) Organizer, Kotlin User Groups Seoul/GDG Incheon
࢚కҙܻ ѐ֛җ ࢎ ݾର ҙܻೡ “࢚క” ঌইࠁӝ ࢚క ઑӘ
؊ ੜ ҙܻ ೧ࠁӝ
Speakerdeck Youtube ࢶഋ UI ೨बѐ֛
࢚కҙܻ ѐ֛җ ࢎ
Before Compose class SampleActivity: AppCompatActivity() { private var name =
"" override fun onCreate(bundle: SavedInstanceState?) { super.onCreate(bundle) // ࢲߡాन APIService.getMyName().enqueue(object: Callback { override fun onResponse(ޤदӽ) { name = response.body().name updateUi() // binding.tv.text = name } }) } }
Before Compose • ѐߊо ߸ࣻܳ ߸҃ೞҊ UI ࢚కܳ ߸҃ೞب۾
٘ܳ ࢿ೧ঠೣ • ߸ࣻо ചݶ ߸҃ਸ दఃחؘ ਃبо ڄয • ചݶਸ ߸҃ೞח Ѫ ߸ࣻ ч ইצ ѐߊ
Before Compose - DataBinding class SampleActivity: AppCompatActivity() { private val
viewModel by viewModels() private lateinit var binding: ActivitySampleBinding override fun onCreate(bundle: SavedInstanceState?) { super.onCreate(bundle) binding = DataBindingUtil.setContentView(this, R.layout.ui) binding.viewModel = viewModel } } <layout> <data> <variable name=“vm” type=“com.sample.ViewModel” /> </data> <TextView <!— ࢤۚ —> android:text=“@{vm.user.nam e}” /> </layout>
Data Binding ߸ࣻܳ ߸҃݅ ೧ب ചݶ ࢚కо ߸҃ؽ ߸ࣻо ചݶ
“࢚క”о غب۾ ࢸ҅ ߑೱ ߸҃ , ചݶ ࢚క ߸҃ о ѐߊীࢲ दझమਵ۽ بؽ بੋ ࠽٘ఋ ࢚थҗ ೧ةೞӝ য۰ ী۞ झఖ ۨझ Data Binding -> View Bindingਵ۽ ֈযоח ୶ࣁ Ӓۢীب ࠛҳೞҊ ѐߊо ചݶ ߸ࣻо “࢚క”۽ ੋधೞѱ ػ ࣁ
Compose بੑ റ @Composable fun SampleText() { var text by
remember { mutableStateOf("") } LaunchedEffect(Unit) { text = APIService.getName().await() } TextField(value = text, onValueChange = { text = it }) }
Compose ߸ࣻܳ ߸҃݅ ೧ب ചݶ ࢚కо ߸҃ؽ ୶оੋ ࠽٘ కझ
হ ߸ࣻо ചݶ ࢚కо ؽ
Compose ߸ࣻо ചݶ ࢚క Android Developers - Ui State
࢚క ખ ؊ ࣁ ঌইࠁӝ
࢚కо ޤਃ? UIܳ അೞח ݽٚ ؘఠ
࢚కҙܻо ޤਃ? UIܳ അೞח ݽٚ ؘఠ ܳ ҙܻೞח ߑߨۿ
ࢤпࠁ ҙܻ೧ঠೡ ࢚క ઙܨח নೞ ഥਗоੑ ੑ۱ Form • ܴ/ݫੌ
ࣗ/࠺ߣഐ ١ ੑ۱ UI • ݫੌࣗ ࠂ ৈࠗ • ࠺ߣഐ Ѩૐ • ࠺ߣഐ ഛੋҗ ࠺ߣഐ ੌ ৈࠗ • ডҙ ز
ࢤпࠁ ҙܻ೧ঠೡ ࢚క ઙܨח নೞ
࢚కҙܻ Key Point ؘఠܳ য٣ী, যڌѱ ਤदఃחо?
࢚క৬ ࢚క
࢚క৬ ࢚క ࢚కо ־ҳীѱ ҕਬغҊ חо ೞա ஹನք && ध
ஹನքٜীѱ ҕਬ - ࢚క ஹನքٜ ࢎਊೡ ࣻ ѱ ҕਬ - ࢚క
࢚క(Global State) @Composable fun TodoTheme( darkTheme: Boolean = false,
content: @Composable () -> Unit ) { val colors = todoColors() val typography = TodoTypography() ProvideTodoColorAndTypography(colors, typography){ MaterialTheme(content = content) } }
উ٘۽٘ীࢲ ࢚కҙܻ
উ٘۽٘ীࢲ ࢚కҙܻ
Configuration Change CompositionLocal۽ ׳غח ч ী غפө Config Change۽ ч
ࠛউ೧ݶ ஹನքী ೱ -> জ উࢿ ೞ ۽ࣁझ ࢤݺӝী উਵ۽ ؘఠ द ਊ ޙઁ rememberSavableਸ ഝਊೞݶ 1MB ղ۽ ؘఠܳ ೧ঠೞחؘ ਗೞח ݅ఀ ؘఠܳ ਸ ೞо ࢚ ޅೠ Exception ఠ ࣻ উ٘۽٘ীࢲ ࢚కҙܻ
࢚కҙܻ Android OS: ॄب જؘ, ॄۄ
࢚క ੜ ҙܻೞӝ
ࠗ࠙ ࢚కҙܻ ViewModel ❤
݈ ViewModelী ֍חѱ ୭ࢶ? Configuration Changeী ٮۄࢲ ч ߸҃೧ঠೡ ࣻ
ѓ۟द Fold৬ э ҃ ਵݶ Phone UI, ಟݶ Tablet UI ࠁৈঠೞח ா झ ߊࢤ, ۠ ؘఠܳ Config Change উѱ فݶ য়۰ ী۞ ߊࢤ ܲ ஹನքٜী ࠛਃೠ ࠁܳ ֈѹ п ёח ೞѱ ҙ҅ػ ܲ ёٜী ೧ࢲ ઁೠػ ध݅ਸ оઉঠ ೠ. (Law of Demeter)
None
StateHolder Class @Stable class NiaAppState( val navController: NavHostController, coroutineScope: CoroutineScope,
networkMonitor: NetworkMonitor, userNewsResourceRepository: UserNewsResourceRepository, timeZoneMonitor: TimeZoneMonitor, ) { private val previousDestination = mutableStateOf<NavDestination?>(null) ……
StateHolder Class @Composable fun rememberNiaAppState( … ): NiaAppState { return
remember { NiaAppState( navController = navController, coroutineScope = coroutineScope, networkMonitor = networkMonitor, userNewsResourceRepository = userNewsResourceRepository, timeZoneMonitor = timeZoneMonitor, )
State Holder https://developer.android.com/topic/architecture/ui-layer/ stateholders
Circuit ନݡೞӝ
Circuit? Circuit is a simple, lightweight, and extensible framework for
building Kotlin applications that’s Compose from the ground up.
Circuit? Circuit рױೞҊ о߶ݴ ഛ оמೠ ۨਕ۽, A-Zө Compose݅ਸ ഝਊೞৈ
Kotlin গܻா࣌ਸ ҳ୷ೡ ࣻ णפ.
Circuit? ࢚కҙܻ ߑध݅ਸ ۽ ঠӝ ೞӝ ٸޙী ജ҃ࢸ ١ ҳഅী
ਃೠ ࣁࠗࢎ೦ٜ ઁ৻ೞणפ
Circuit?
Circuit?
Circuit рױೠ ҳઑب
Screen data class CounterScreen(val initialCount: Int): Screen data class DetailScreen(val
id: Long): Screen data class FavoriteScreen: Screen
CircuitUiState, CircuitUiEvent sealed inte rf ace State : CircuitUiState {
data object Loading : State data object NoFavorites : State data class Results( val list: List<Favorite>, val eventSink: (Event) -> Unit ) : State } sealed inte rf ace Event : CircuitUiEvent { data class ClickFavorite(id: Long): Event }
@Composable fun CounterPresenter(): CounterState { var count by rememberSaveable {
mutableStateOf(0) } return CounterState(count) { event -> when (event) { CounterEvent.Increment -> count++ CounterEvent.Decrement -> count-- } } } Presenter
@Composable fun CounterPresenter(): CounterState { var count by rememberRetained {
mutableStateOf(0) } return CounterState(count) { event -> when (event) { CounterEvent.Increment -> count++ CounterEvent.Decrement -> count-- } } } Presenter
rememberRetained
// CircuitUiState ఋੑ expo rt inte rf ace CounterState {
value: number } // CircuitUiState ୡӝ ё const initialState: CounterState = { value: 0, } Redux Toolkitҗ Presenter
// Circuit presenter expo rt const counterSlice = createSlice({ name:
'counter', // Updateغח state initialState, reducers: { // event ࠗ࠙ increment: (state) => { state.value += 1 }, decrement: (state) => { state.value -= 1 } } ) Redux Toolkitҗ Presenter
@CircuitInject(FavoriteScreen::class, ActivityRetainedComponent::class) @Composable fun FavoritesList(state: FavoritesScreen.State) { when (state) {
Loading -> Text(text = stringResource(R.string.loading_favorites)) NoFavorites -> Text( modi fi er = Modi fi er.testTag("no favorites"), text = stringResource(R.string.no_favorites) ) is Results -> { LazyColumn { items(state.list) { Favorite(it, state.eventSink) } } } } } Screen
Circuitী ೠ рۚೠ ࣗх • ഋ জҗ э ҃, ఋੑ/ҳഅী
ೠ ӏઁٜ ࢤೞח ٘ ాੌࢿҗ оةࢿਸ ֫ৈ ࣻ • Unit Testب рױೞѱ ࢿೡ ࣻ • Compose runtimeਸ ഝਊ೧ࢲ ߈ഋ ࢚కܳ ઁೡ ࣻ ח Ѫী
Circuitী ೠ рۚೠ ࣗх • Ѧ ਊೡ ࣻ ח ഥࢎо
ݻա ਸө? • নೠ بҳٜ(Flow, Rx, Legacy View ١)җ interopਸ ೡ ࣻ ݅, ܳ interopೞӝ ਤ೧ ٘ח ݆ࣻ ҕٜࣻਸ ࢤп೧ঠؽ • ъઁ۽ ҳഅ/ࢎਊ೧ঠೞח Ѫٜ(Presenter, Navigator ١) ݆ই पઁ۽ ۽؋࣌ী ਊؼ݅ೠח ޙ
@Composable fun ScreenA() { var isB by rememberRetained { mutableStateOf(true)
} rememberRetained{ "A" } if(isB) { rememberRetained{ "B" } } else { rememberRetained{ "C" } } } takahirom/Rin
উ٘۽٘ীࢲ ࢚కҙܻ ࢚క৬ ࢚క ࢚కܳ ࠁ ؊ ੜ ҙܻೠ ߑߨ
Summary
Thank you Incheon HyunWoo Lee Android(React Native) Developer, Viva Republica(Toss)