Jetpack Compose嵌套导航传参遇SerializationException问题求助

开发带嵌套导航的Jetpack Compose项目时，遵循Android官方类型安全导航参数文档，使用数据类在嵌套导航图中传参时抛出以下异常：

kotlinx.serialization.SerializationException: Serializer for class 'Companion' is not found. Please ensure that class is marked as '@Serializable' and that the serialization compiler plugin is applied.

相关代码如下：

数据类 #

@Serializable
data class GroupDetail(val id: String)

导航逻辑 #

rootNavController.navigate(
    GroupDetail(
        id = selectedGroup.id.toString()
    )
)

嵌套导航图 #

fun NavGraphBuilder.groupDetailNavGraph(rootNavController: NavHostController) {
    navigation<GroupDetailGraph>(
        startDestination = GroupDetail
    ) {
        composable<GroupDetail> { backStackEntry ->
            val group: GroupDetail = backStackEntry.toRoute()
            GroupDetailScreen(rootNavController = rootNavController)
        }
    }
}

已确认GroupDetail类标记了@Serializable，且kotlinx.serialization插件已启用，仍持续抛出该序列化异常，求排查方向及解决方法。

• 修正嵌套导航图的路由类型匹配：你在navigation函数中指定了GroupDetailGraph作为路由类型，但startDestination直接传入了GroupDetail类引用，这会导致系统尝试序列化GroupDetail的Companion对象，而非路由实例。嵌套导航图的startDestination必须是与泛型类型匹配的路由实例。
• 统一嵌套导航图的路由定义：将嵌套导航图的所有路由封装到一个序列化的密封类中，确保类型一致：

// 定义嵌套导航图的所有路由
@Serializable
sealed class GroupDetailGraph {
    @Serializable
    data object Root : GroupDetailGraph()
    @Serializable
    data class GroupDetail(val id: String) : GroupDetailGraph()
}

• 更新嵌套导航图实现：使用封装后的路由类，确保startDestination和composable的路由类型统一：

fun NavGraphBuilder.groupDetailNavGraph(rootNavController: NavHostController) {
    navigation<GroupDetailGraph>(
        startDestination = GroupDetailGraph.Root
    ) {
        composable<GroupDetailGraph.GroupDetail> { backStackEntry ->
            val group = backStackEntry.toRoute<GroupDetailGraph.GroupDetail>()
            GroupDetailScreen(rootNavController = rootNavController, groupId = group.id)
        }
    }
}

• 修正导航调用逻辑：导航时传入正确的路由实例，避免直接引用类：

rootNavController.navigate(
    GroupDetailGraph.GroupDetail(
        id = selectedGroup.id.toString()
    )
)

• 再次验证序列化插件配置：确保项目配置无遗漏：
  项目级build.gradle.kts：

plugins {
    id("org.jetbrains.kotlin.plugin.serialization") version "1.9.20" apply false
}

模块级build.gradle.kts：

plugins {
    id("com.android.application")
    id("org.jetbrains.kotlin.android")
    id("org.jetbrains.kotlin.plugin.serialization")
}

dependencies {
    implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.6.0")
    implementation("androidx.navigation:navigation-compose:2.7.7")
}

内容的提问来源于stack exchange，提问作者Hassan Raza