在 Jetpack Compose 中导航到没有先前脚手架的另一个屏幕
Navigate to another screen without the previous scaffold in Jetpack Compose
我的应用有一个带有脚手架和底部导航栏的主屏幕:
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContent {
val navController = rememberNavController()
MyApplicationTheme {
Scaffold(
bottomBar = {
BottomBar(navController = navController)
}
) {
NavigationGraph(navController = navController)
}
}
}
}
...
@Composable
fun NavigationGraph(navController: NavHostController){
NavHost(navController = navController, startDestination = BottomMenuOption.Home.route) {
composable(route = BottomMenuOption.Home.route) {
HomeScreen(navController = navController)
}
composable(route = BottomMenuOption.Settings.settings) {
SettingsScreen()
}
composable(route = BottomMenuOption.Profile.route) {
ProfileScreen()
}
composable(route = "feature") {
FeatureScreen()
}
}
}
FeatureScreen
有自己的 Scaffold
,带有 topBar
而不是 bottomBar,当我从 HomeScreen
导航到它时,我想从主屏幕,只看到一个顶部栏,但相反,我在屏幕上看到了两个栏。
@Composable
fun FeatureScreen() {
Scaffold (
topBar = {
TopBar(" Feature Screen")
}
) {
}
}
这有可能实现吗?我认为这可以通过使用新的 Activity 来完成,但理想情况下,我想保留 Single Activity 方法。
我建议像这样创建一个新函数:
@Composable
fun MainScaffold(
topBar: @Composable (() -> Unit) = {},
bottomBar: @Composable (() -> Unit) = {},
content: @Composable (PaddingValues) -> Unit){
Scaffold(
bottomBar = bottomBar,
topBar = topBar,
content = content
)
}
然后,在您的屏幕中使用这个主支架:
@Composable
fun HomeScreen(navController: NavHostController) {
MainScaffold(
bottomBar = { BottomBar(navController = navController) },
content = {
// content
})
}
并在您的功能屏幕中:
@Composable
fun FeatureScreen() {
MainScaffold (
topBar = {
TopBar(" Feature Screen")
}
) {
//content
}
}
并在 setContent
setContent {
val navController = rememberNavController()
VoiceAssistantJetpackComposeTheme {
NavigationGraph(navController = navController)
}}
我的应用有一个带有脚手架和底部导航栏的主屏幕:
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContent {
val navController = rememberNavController()
MyApplicationTheme {
Scaffold(
bottomBar = {
BottomBar(navController = navController)
}
) {
NavigationGraph(navController = navController)
}
}
}
}
...
@Composable
fun NavigationGraph(navController: NavHostController){
NavHost(navController = navController, startDestination = BottomMenuOption.Home.route) {
composable(route = BottomMenuOption.Home.route) {
HomeScreen(navController = navController)
}
composable(route = BottomMenuOption.Settings.settings) {
SettingsScreen()
}
composable(route = BottomMenuOption.Profile.route) {
ProfileScreen()
}
composable(route = "feature") {
FeatureScreen()
}
}
}
FeatureScreen
有自己的 Scaffold
,带有 topBar
而不是 bottomBar,当我从 HomeScreen
导航到它时,我想从主屏幕,只看到一个顶部栏,但相反,我在屏幕上看到了两个栏。
@Composable
fun FeatureScreen() {
Scaffold (
topBar = {
TopBar(" Feature Screen")
}
) {
}
}
这有可能实现吗?我认为这可以通过使用新的 Activity 来完成,但理想情况下,我想保留 Single Activity 方法。
我建议像这样创建一个新函数:
@Composable
fun MainScaffold(
topBar: @Composable (() -> Unit) = {},
bottomBar: @Composable (() -> Unit) = {},
content: @Composable (PaddingValues) -> Unit){
Scaffold(
bottomBar = bottomBar,
topBar = topBar,
content = content
)
}
然后,在您的屏幕中使用这个主支架:
@Composable
fun HomeScreen(navController: NavHostController) {
MainScaffold(
bottomBar = { BottomBar(navController = navController) },
content = {
// content
})
}
并在您的功能屏幕中:
@Composable
fun FeatureScreen() {
MainScaffold (
topBar = {
TopBar(" Feature Screen")
}
) {
//content
}
}
并在 setContent
setContent {
val navController = rememberNavController()
VoiceAssistantJetpackComposeTheme {
NavigationGraph(navController = navController)
}}