使用 Compose 在以檢視區塊為基礎的 Android 應用程式中新增自動調整式版面配置

$ git clone https://github.com/android/add-adaptive-layouts

sealed class MenuItem(
    // Resource ID of the icon for the menu item
    @DrawableRes val iconId: Int,
    // Resource ID of the label text for the menu item
    @StringRes val labelId: Int,
    // ID of a destination to navigate users
    @IdRes val destinationId: Int
) {

    object Home: MenuItem(
        R.drawable.ic_baseline_home_24,
        R.string.home,
        R.id.SportsListFragment
    )

    object Favorites: MenuItem(
        R.drawable.ic_baseline_favorite_24,
        R.string.favorites,
        R.id.FavoritesFragment
    )

    object Settings: MenuItem(
        R.drawable.ic_baseline_settings_24,
        R.string.settings,
        R.id.SettingsFragment
    )
}

@Composable
fun BottomNavigationBar(
    menuItems: List<MenuItem>,
    modifier: Modifier = Modifier,
    onMenuSelected: (MenuItem) -> Unit = {}
) {

    NavigationBar(modifier = modifier) {
        menuItems.forEach { menuItem ->
            NavigationBarItem(
                selected = false,
                onClick = { onMenuSelected(menuItem) },
                icon = {
                    Icon(
                        painter = painterResource(id = menuItem.iconId),
                        contentDescription = null)
                },
                label = { Text(text = stringResource(id = menuItem.labelId))}
            )
        }
    }
}

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior">

        <androidx.fragment.app.FragmentContainerView
            android:id="@+id/nav_host_fragment_content_main"
            android:name="androidx.navigation.fragment.NavHostFragment"
            android:layout_width="0dp"
            android:layout_height="0dp"
            app:defaultNavHost="true"
            app:layout_constraintBottom_toTopOf="@id/top_navigation"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:navGraph="@navigation/nav_graph" />

        <androidx.compose.ui.platform.ComposeView
            android:id="@+id/navigation"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:menu="@menu/top_navigation" />
    </androidx.constraintlayout.widget.ConstraintLayout>

val navigationMenuItems = listOf(
    MenuItem.Home,
    MenuItem.Favorites,
    MenuItem.Settings
)

binding.navigation.setContent {
    MaterialTheme {
        BottomNavigationBar(menuItems = navigationMenuItems){ menuItem ->
            navController.navigate(screen.destinationId)
        }
    }
}

<activity
    android:name=".MainActivity"
    android:exported="true"
    android:screenOrientation="fullUser">

<androidx.slidingpanelayout.widget.SlidingPaneLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/sliding_pane_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".SportsListFragment">

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/recycler_view"
        android:layout_width="280dp"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:clipToPadding="false"
        android:padding="8dp"
        app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager" />

    <androidx.fragment.app.FragmentContainerView
        android:layout_height="match_parent"
        android:layout_width="300dp"
        android:layout_weight="1"
        android:id="@+id/detail_container"
        android:name="com.example.android.sports.NewsDetailsFragment"/>
</androidx.slidingpanelayout.widget.SlidingPaneLayout>

val adapter = SportsAdapter {
    sportsViewModel.updateCurrentSport(it)
    // Navigate to the details pane.
    val action =
       SportsListFragmentDirections.actionSportsListFragmentToNewsFragment()
    this.findNavController().navigate(action)
}

val adapter = SportsAdapter {
    sportsViewModel.updateCurrentSport(it)
    if(slidingPaneLayout.isSlidable && !slidingPaneLayout.isOpen){
        // Navigate to the details pane.
        val action =
           SportsListFragmentDirections.actionSportsListFragmentToNewsFragment()
        this.findNavController().navigate(action)
    }
}

binding.navigation.setContent {
    MaterialTheme {
        when(rememberWidthSizeClass()){
            WidthSizeClass.COMPACT ->
                BottomNavigationBar(menuItems = navigationMenuItems){ menuItem ->
                    navController.navigate(screen.destinationId)
                }
            WidthSizeClass.MEDIUM ->
                NavRail(menuItems = navigationMenuItems){ menuItem ->
                    navController.navigate(screen.destinationId)
                }
            WidthSizeClass.EXPANDED ->
                NavigationDrawer(
                    menuItems = navigationMenuItems,
                    modifier = Modifier.width(256.dp)
                ) { menuItem ->
                    navController.navigate(screen.destinationId)
                }
        }

    }
}

  <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior">

        <androidx.fragment.app.FragmentContainerView
            android:id="@+id/nav_host_fragment_content_main"
            android:name="androidx.navigation.fragment.NavHostFragment"
            android:layout_width="0dp"
            android:layout_height="0dp"
            app:defaultNavHost="true"
            app:layout_constraintLeft_toRightOf="@+id/top_navigation"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintBottom_toBottomOf="parent"
            app:navGraph="@navigation/nav_graph" />

        <androidx.compose.ui.platform.ComposeView
            android:id="@+id/top_navigation"
            android:layout_width="wrap_content"
            android:layout_height="0dp"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:menu="@menu/top_navigation" />
    </androidx.constraintlayout.widget.ConstraintLayout>