Jetpack Compose Navigation

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Zhanibek Marshal, 6 August 2022 Navigating screens on Jetpack Compose Перемещаемся между экранами как надо

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Давным давно …в далекой галактике • Intent • Fragment Manager • Jetpack Navigation

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2008 Переходы по Activity Intent Fragment Manager Jetpack Navigation 2011 Поддержка больших экранов с помощью Fragment Тоже переходы по Fragment Но теперь в Navigation Graph 2019

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1 Activity + n * Fragment Современный подход Activity Fragment A Fragment B Fragment A Fragment B ViewModel A ViewModel B Activity Lifecycle Fragments Lifecycle ViewModel Lifecycle

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Jetpack Compose Navigation

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- + 10

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Delivery cost 5 € Total 150.5 € Shut up and take my money

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Дорого переписывать Existing applications Jetpack Navigation Compose View Fragments

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Мечта разработчиков New applications Jetpack *Compose* Navigation @Composable Composable Screens 🚀

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Navigation Graph

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NavHost Destination Destination Destination

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NavHost Advertisements AdvertDetails AdvertPhotos NavGraph NavGraph

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Пока нет визуализации NavGraph

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Переходы по параметрам

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Как сделать код более чище Индивидуальный подход

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Реализация NavigationCommand Повторяем дома

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NavigationManager Используем силу Kotlin Coroutines

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NavigationManager Привязываем к Activity

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NavigationManager Передаем navHostController

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Modular Navigation with Jetpack Compose medium.com

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Архитектура

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1 Activity + n * Compose Screen Как было изначально Activity Fragment A Fragment B Fragment A Fragment B ViewModel A ViewModel B Activity Lifecycle Fragments Lifecycle ViewModel Lifecycle

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1 Activity + n * Compose Screen А теперь вот так Activity Screen A Screen B Screen A Screen B Screen A ViewModel Screen B ViewModel Activity Lifecycle Fragments Lifecycle ViewModel Lifecycle

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1 Activity + n * Compose Screen Должен быть NavHost Activity Screen A Screen B Screen A Screen B Screen A ViewModel Screen B ViewModel Activity Lifecycle Fragments Lifecycle ViewModel Lifecycle NavHost

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NavType Какие типы поддерживаются Integer Float Long Boolean String Resource reference Parcelable Serializable Enum

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Deep Linking AndroidManifest.xml

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Deep Linking NavHost

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Navigation Options Navigate

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Navigation Options Navigate A B C A Stack

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Navigation Options Navigate A B C A Stack B Navigate

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Navigation Options Navigate A B C A Stack B C Navigate

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Navigation Options Navigate A B C A Stack B C Navigate A

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Navigation Options PopUpTo

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Navigation Options PopUpTo A B C A Stack

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Navigation Options PopUpTo A B C A Stack B Navigate

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Navigation Options PopUpTo A B C A Stack B C Navigate

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Navigation Options PopUpTo A B C A Stack B C navigate(“A”) { popUpTo(“A”) }

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Navigation Options PopUpTo A B C A Stack navigate(“A”) { popUpTo(“A”) } A

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Navigation Options PopUpTo & Inclusive

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Navigation Options PopUpTo & Inclusive A B C A Stack

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Navigation Options PopUpTo & Inclusive A B C A Stack B Navigate

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Navigation Options PopUpTo & Inclusive A B C A Stack B C Navigate

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Navigation Options PopUpTo & Inclusive A B C A Stack B C navigate(“A”) { popUpTo(“A”) { inclusive = true } }

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Navigation Options PopUpTo & Inclusive A B C A Stack navigate(“A”) { popUpTo(“A”) { inclusive = true } }

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Полезные ссылки • Modular Navigation with Jetpack Compose: Joe Birch   https://medium.com/google-developer-experts/modular-navigation-with- jetpack-compose-fda9f6b2bef7 • Jetpack Compose: Navigation with Alex Zhukovich  https://www.youtube.com/watch?v=dYTfYGwINlo • Jetpack Compose Navigation: code lab from Google  https://developer.android.com/codelabs/jetpack-compose-navigation