android studio ide 无法识别可组合项

Question

在内容块内创建 NavHost 时，android studio 无法识别可组合项：我添加了导航依赖项，甚至还添加了导入语句.. 预先感谢

单击突出显示的文本（蓝色）以了解我正在谈论的内容。

我尝试打开新项目然后进行示例演示，但它也不起作用。

这是build.gradle.kts

`plugins {
alias(libs.plugins.android.application)
alias(libs.plugins.kotlin.android)
alias(libs.plugins.kotlin.compose)
//    id("androidx.navigation.safeargs.kotlin")
  }

android {
namespace = "com.example.navigation"
compileSdk = 34

defaultConfig {
    applicationId = "com.example.navigation"
    minSdk = 24
    targetSdk = 34
    versionCode = 1
    versionName = "1.0"

    testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
}

buildTypes {
    release {
        isMinifyEnabled = false
        proguardFiles(
            getDefaultProguardFile("proguard-android-optimize.txt"),
            "proguard-rules.pro"
        )
    }
}
compileOptions {
    sourceCompatibility = JavaVersion.VERSION_1_8
    targetCompatibility = JavaVersion.VERSION_1_8
}
kotlinOptions {
    jvmTarget = "1.8"
}
buildFeatures {
    compose = true
}
}

dependencies {
val nav_version = "2.8.2"

// Jetpack Compose integration
implementation("androidx.navigation:navigation-compose:$nav_version")

implementation(libs.androidx.core.ktx)
implementation(libs.androidx.lifecycle.runtime.ktx)
implementation(libs.androidx.activity.compose)
implementation(platform(libs.androidx.compose.bom))
implementation(libs.androidx.ui)
implementation(libs.androidx.ui.graphics)
implementation(libs.androidx.ui.tooling.preview)
implementation(libs.androidx.material3)
testImplementation(libs.junit)
androidTestImplementation(libs.androidx.junit)
androidTestImplementation(libs.androidx.espresso.core)
androidTestImplementation(platform(libs.androidx.compose.bom))
androidTestImplementation(libs.androidx.ui.test.junit4)
debugImplementation(libs.androidx.ui.tooling)
debugImplementation(libs.androidx.ui.test.manifest)
}`

这就是卡住的地方。

package com.example.navigation

import android.os.Bundle
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.activity.enableEdgeToEdge
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.padding
import androidx.compose.material3.Scaffold
import androidx.navigation.compose.composable
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
import androidx.compose.ui.tooling.preview.Preview
import androidx.navigation.NavController
import androidx.navigation.compose.NavHost
import androidx.navigation.compose.rememberNavController
import com.example.navigation.ui.theme.NavigationTheme

class MainActivity : ComponentActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    enableEdgeToEdge()
    setContent {
        NavigationTheme {
            val navController= rememberNavController()
            Scaffold(modifier = Modifier.fillMaxSize()) {   innerPadding ->
                Greeting(
                    name = "Android",
                    modifier = Modifier.padding(innerPadding),
                    navController=navController
                )
            }
        }
    }
}
}






@Composable
fun Greeting(name: String, modifier: Modifier =   Modifier,navController: NavController) {
NavHost(navController,"Home"){
   composable("Home"){

   }
}
}

在此可组合项中以红色突出显示....

Answer 1

看来您的依赖项设置正确。您可以尝试的一件事是自己添加导入语句。

导入 androidx.navigation.compose.composable