[null,null,["最后更新时间 (UTC)：2025-07-27。"],[],[],null,["# Navigation 3\n\n| **Experimental:** Navigation 3 is in alpha. The APIs may change in the future. Please file bugs and feedback using the [issue tracker](https://issuetracker.google.com/issues/new?component=1750212&template=2102223).\n\nNavigation 3 is a new navigation library designed to work with Compose. With\nNavigation 3, you have full control over your back stack, and navigating to and\nfrom destinations is as simple as adding and removing items from a list. It\ncreates a flexible app navigation system by providing:\n\n- Conventions for modeling a back stack, where each entry on the back stack represents content that the user has navigated to\n- A UI that automatically updates with back stack changes (including animations)\n- A scope for items in the back stack, allowing state to be retained while an item is in the back stack\n- An adaptive layout system that allows multiple destinations to be displayed at the same time, and allowing seamless switching between those layouts\n- A mechanism for content to communicate with its parent layout (metadata)\n\nAt a high level, you implement Navigation 3 in the following ways:\n\n1. Define the content that users can navigate to in your app, each with a unique key, and add a function to resolve that key to the content. See [Resolve keys\n to content](/guide/navigation/navigation-3/basics#resolve-keys).\n2. Create a back stack that keys are pushed onto and removed as users navigate your app. See [Create a back stack](/guide/navigation/navigation-3/basics#create-back).\n3. Use a [`NavDisplay`](/reference/kotlin/androidx/navigation3/ui/package-summary#NavDisplay(kotlin.collections.List,androidx.compose.ui.Modifier,androidx.compose.ui.Alignment,kotlin.Function1,kotlin.collections.List,androidx.navigation3.ui.SceneStrategy,androidx.compose.animation.SizeTransform,kotlin.Function1,kotlin.Function1,kotlin.Function1,kotlin.Function1)) to display your app's back stack. Whenever the back stack changes, it updates the UI to display relevant content. See [Display\n the back stack](/guide/navigation/navigation-3/basics#display-back).\n4. Modify `NavDisplay`'s [scene strategies](/guide/navigation/navigation-3/custom-layouts) as needed to support adaptive layouts and different platforms.\n\nYou can see the [full source code](https://cs.android.com/androidx/platform/frameworks/support/+/androidx-main:navigation3/) for Navigation 3 on AOSP.\n\nImprovements upon Jetpack Navigation\n------------------------------------\n\nNavigation 3 improves upon the original Jetpack Navigation API in the following\nways:\n\n- Provides a simpler integration with Compose\n- Offers you full control of the back stack\n- Makes it possible to create layouts that can read more than one destination from the back stack at the same time, allowing them to adapt to changes in window size and other inputs.\n\nRead more about Navigation 3's principles and API design choices in [this blog\npost](https://android-developers.googleblog.com/2025/05/announcing-jetpack-navigation-3-for-compose.html).\n\nCode samples\n------------\n\nThe [recipes repository](https://github.com/android/nav3-recipes) contains examples of how to use the\nNavigation 3 building blocks to solve common navigation challenges."]]
