在Jetpack Compose中使用Fragment进行底部导航可以通过以下步骤实现:
implementation 'androidx.compose.ui:ui:1.0.0'
implementation 'androidx.compose.material:material:1.0.0'
implementation 'androidx.compose.runtime:runtime:1.0.0'
implementation 'androidx.compose.runtime:runtime-livedata:1.0.0'
@Composable
fun FragmentContainer() {
val navController = rememberNavController()
val backStackEntry = navController.currentBackStackEntryAsState()
val currentRoute = backStackEntry.value?.arguments?.getString(KEY_ROUTE)
NavHost(navController, startDestination = "home") {
composable("home") { HomeFragment(navController) }
composable("profile") { ProfileFragment(navController) }
// 添加其他的Fragments
}
Scaffold(
bottomBar = {
BottomNavigation {
BottomNavigationItem(
icon = { Icon(Icons.Filled.Home, "Home") },
label = { Text("Home") },
selected = currentRoute == "home",
onClick = {
navController.navigate("home") {
popUpTo(navController.graph.startDestinationId)
launchSingleTop = true
}
}
)
BottomNavigationItem(
icon = { Icon(Icons.Filled.Person, "Profile") },
label = { Text("Profile") },
selected = currentRoute == "profile",
onClick = {
navController.navigate("profile") {
popUpTo(navController.graph.startDestinationId)
launchSingleTop = true
}
}
)
// 添加其他的底部导航项
}
}
)
}
NavHostController
来处理导航逻辑。例如,在HomeFragment中:@Composable
fun HomeFragment(navController: NavHostController) {
// Fragment的内容
}
setContent{}
函数中使用FragmentContainer()
函数来显示底部导航。setContent {
YourTheme {
FragmentContainer()
}
}
这样,你就可以在Jetpack Compose中使用Fragment进行底部导航了。对于更复杂的导航需求,你可以添加更多的导航项和Fragment,以满足你的应用程序需求。
注意:以上代码示例中使用的rememberNavController()
和NavHost
来自Compose Navigation库。如果你的项目中还没有使用Compose Navigation库,你需要在build.gradle文件中添加以下依赖项:
implementation "androidx.navigation:navigation-compose:2.4.0-alpha10"
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