在主 Activity 中注入 viewModel 时 Jetpack compose 出错

问题描述 投票：0回答：1

我在运行应用程序时遇到异常。

FATAL EXCEPTION: main (Ask Gemini)
Process: com.nishant.comicslibrary, PID: 29957
ava.lang.IllegalArgumentException: CreationExtras must have a value by `SAVED_STATE_REGISTRY_OWNER_KEY`
at androidx.lifecycle.SavedStateHandleSupport.createSavedStateHandle(SavedStateHandleSupport.kt:89)
at
dagger.hilt.android.internal.lifecycle.HiltViewModelFactory$2.create(HiltViewModelFactory.java:100)
at
dagger.hilt.android.internal.lifecycle.HiltViewModelFactory.create(HiltViewModelFactory.java:170)
at androidx.lifecycle.ViewModelProvider$Factory.create(ViewModelProvider.android.kt:158)
at androidx.lifecycle.viewmodel.ViewModelProviderImpl.getViewModel$lifecycle_viewmodel_release(ViewModelProviderImpl.kt:69)
at androidx.lifecycle.viewmodel.ViewModelProviderImpl.getViewModel$lifecycle_viewmodel_release$default(ViewModelProviderImpl.kt:47)

这是我的主要活动

class MainActivity : ComponentActivity() {

    //private val lvm by viewModels<LibraryApiViewModel>()

    private lateinit var navController: NavHostController
    private val lvm: LibraryApiViewModel by viewModels()

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        enableEdgeToEdge()
        setContent {
            ComicsLibraryTheme {
                navController = rememberNavController()
                Surface(
                    modifier = Modifier.fillMaxSize(),
                    color = MaterialTheme.colorScheme.background
                ) {
                    CharactersScaffold(navController = navController, lvm = lvm)
                }
            }
        }
    }
}

@Composable
fun CharactersScaffold(navController: NavHostController, lvm: LibraryApiViewModel) {
    //val ScaffoldState = rememberScaffoldState()
    val snackbarHostState = remember { SnackbarHostState() }
    val scope = rememberCoroutineScope()
    Scaffold(
        snackbarHost = { SnackbarHost(snackbarHostState) },
        //scaffoldState = ScaffoldState,
        bottomBar = { CharacterBottomNav(navController = navController)}
    ) { paddingValues ->
        NavHost(
            navController = navController,
            startDestination = Destination.Library.route,
            modifier = Modifier.padding(paddingValues)
        ) {
            composable(Destination.Library.route) {
                LibraryScreen(navController, lvm, paddingValues)
            }
            composable(Destination.Collection.route) {
                CollectionScreen()
            }
            composable(Destination.CharacterDetail.route) {navBackStackEntery ->

            }
        }
    }
}

ViewModel 类

@HiltViewModel
class LibraryApiViewModel @Inject constructor(
    private val repo: MarvelApiRepo
): ViewModel() {
 // View model code
}

我的 lib.version.toml 文件

[versions]
agp = "8.4.1"
kotlin = "1.9.0"
coreKtx = "1.13.1"
junit = "4.13.2"
junitVersion = "1.1.5"
espressoCore = "3.5.1"
lifecycleRuntimeKtx = "2.8.1"
activityCompose = "1.9.0"
composeBom = "2024.05.00"
hilt = "2.51.1"
navVersion = "2.7.7"
coilVersion = "2.1.0"
lifecycleVersion = "2.8.1"
retrofitVersion = "2.11.0"
roomVersion = "2.6.1"

[libraries]
androidx-core-ktx = { group = "androidx.core", name = "core-ktx", version.ref = "coreKtx" }
junit = { group = "junit", name = "junit", version.ref = "junit" }
androidx-junit = { group = "androidx.test.ext", name = "junit", version.ref = "junitVersion" }
androidx-espresso-core = { group = "androidx.test.espresso", name = "espresso-core", version.ref = "espressoCore" }
androidx-lifecycle-runtime-ktx = { group = "androidx.lifecycle", name = "lifecycle-runtime-ktx", version.ref = "lifecycleRuntimeKtx" }
androidx-activity-compose = { group = "androidx.activity", name = "activity-compose", version.ref = "activityCompose" }
androidx-compose-bom = { group = "androidx.compose", name = "compose-bom", version.ref = "composeBom" }
androidx-ui = { group = "androidx.compose.ui", name = "ui" }
androidx-ui-graphics = { group = "androidx.compose.ui", name = "ui-graphics" }
androidx-ui-tooling = { group = "androidx.compose.ui", name = "ui-tooling" }
androidx-ui-tooling-preview = { group = "androidx.compose.ui", name = "ui-tooling-preview" }
androidx-ui-test-manifest = { group = "androidx.compose.ui", name = "ui-test-manifest" }
androidx-ui-test-junit4 = { group = "androidx.compose.ui", name = "ui-test-junit4" }
androidx-material3 = { group = "androidx.compose.material3", name = "material3" }
google-dagger-hilt = { group = "com.google.dagger", name = "hilt-android", version.ref = "hilt" }
google-dagger-hilt-compiler = { group = "com.google.dagger", name = "hilt-compiler", version.ref = "hilt" }
androidx-navigation = {group = "androidx.navigation", name = "navigation-compose", version.ref = "navVersion"}
io-coil = {group = "io.coil-kt", name = "coil-compose", version.ref = "coilVersion"}
androidx-viewmodel-compose = {group = "androidx.lifecycle", name = "lifecycle-viewmodel-compose", version.ref = "lifecycleVersion"}
com-squareup-retrofit = {group = "com.squareup.retrofit2", name = "retrofit", version.ref = "retrofitVersion"}
com-squareup-retrofit-converter-gson = {group = "com.squareup.retrofit2", name = "converter-gson", version.ref = "retrofitVersion"}
androidx-room = {group = "androidx.room", name = "room-runtime", version.ref = "roomVersion"}
androidx-room-compiler = {group = "androidx.room", name = "room-compiler", version.ref = "roomVersion"}
androidx-room-ktx = {group = "androidx.room", name = "room-ktx", version.ref = "roomVersion"}

[plugins]
android-application = { id = "com.android.application", version.ref = "agp" }
jetbrains-kotlin-android = { id = "org.jetbrains.kotlin.android", version.ref = "kotlin" }
kotlin-kapt = { id = "org.jetbrains.kotlin.kapt", version.ref = "kotlin" }
hilt = { id = "com.google.dagger.hilt.android", version.ref = "hilt" }
androidx-room = {id = "androidx.room", version.ref = "roomVersion"}

我的项目级别build.gradle文件

// Top-level build file where you can add configuration options common to all sub-projects/modules.
plugins {
    alias(libs.plugins.android.application) apply false
    alias(libs.plugins.jetbrains.kotlin.android) apply false
    alias(libs.plugins.androidx.room) apply false
    alias(libs.plugins.kotlin.kapt) apply false
    alias(libs.plugins.hilt) apply false

}

我的应用程序级别 build.gradle 文件

import java.util.Properties
import java.io.FileInputStream

plugins {
    alias(libs.plugins.android.application)
    alias(libs.plugins.jetbrains.kotlin.android)
    alias(libs.plugins.androidx.room)
    alias(libs.plugins.hilt)
    alias(libs.plugins.kotlin.kapt)
}

val apikeyPropertiesFile = rootProject.file("apikey.properties")
val apikeyProperties = Properties()
apikeyProperties.load(FileInputStream(apikeyPropertiesFile))

android {
    namespace = "com.nishant.comicslibrary"
    compileSdk = 34

    defaultConfig {
        applicationId = "com.nishant.comicslibrary"
        minSdk = 24
        targetSdk = 34
        versionCode = 1
        versionName = "1.0"

        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
        vectorDrawables {
            useSupportLibrary = true
        }

        buildConfigField("String", "MARVEL_KEY", apikeyProperties.getProperty("MARVEL_KEY"))
        buildConfigField("String", "MARVEL_SECRET", apikeyProperties.getProperty("MARVEL_SECRET"))
    }

    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
    }
    composeOptions {
        kotlinCompilerExtensionVersion = "1.5.1"
    }
    packaging {
        resources {
            excludes += "/META-INF/{AL2.0,LGPL2.1}"
        }
    }
    room {
        schemaDirectory("$projectDir/schemas")
    }
}

dependencies {

    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)

    //hilt
    implementation(libs.google.dagger.hilt)
    kapt(libs.google.dagger.hilt.compiler)

    //navigation
    implementation(libs.androidx.navigation)

    //coil
    implementation(libs.io.coil)

    //viewmodel compose
    implementation(libs.androidx.viewmodel.compose)

    //Retrofit
    implementation(libs.com.squareup.retrofit)
    implementation(libs.com.squareup.retrofit.converter.gson)

    //room
    implementation(libs.androidx.room)
    kapt(libs.androidx.room.compiler)
    implementation(libs.androidx.room.ktx)

    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)
}

kapt {
    correctErrorTypes = true
}
android android-jetpack-compose viewmodel dagger-hilt
1个回答
0
投票

通过查看您的代码，我认为您错过的部分是，您没有使用 

MainActivity
注释来注释您的 
@AndroidEntryPoint
以便刀柄正常工作。因此，hilt 无法在 MainActivity 中注入 
LibraryApiViewModel
的实例，从而引发错误。

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