Unresolved reference: DaggerApplicationComponent

Question

For some reason Dagger doesn't generate DaggerApplicationComponent for my component. I tried: rebuilding, cleaning, invalidating cache, restarting Android Studio and etc. Nothing worked for me. Here is the full code:

Modules

@Module
class AppModule {

    @Provides
    @Singleton
    fun provideContext(): Context = provideContext()
}

@Module
class DatabaseModule {

    @Provides
    @Singleton
    open fun provideRoom(context: Context): RoomDatabase =
        Room.databaseBuilder(
            context,
            AppDatabase::class.java,
            DATABASE_NAME
        ).build()
}

@Module
class NetworkModule {

    private val json = Json { ignoreUnknownKeys = true }
    private val client = OkHttpClient.Builder()
        .addInterceptor(TokenInterceptor)
        .build()

    @Provides
    @Singleton
    open fun provideRetrofit(): Retrofit =
        Retrofit.Builder()
            .baseUrl(BASE_URL)
            .addConverterFactory(json.asConverterFactory("application/json".toMediaType()))
            .client(client)
            .build()
}

Component

@Singleton
@Component(modules = [AppModule::class, DatabaseModule::class, NetworkModule::class])
interface ApplicationComponent {
    fun inject(defaultRepository: DefaultRepository)
    fun inject(myApplication: MyApplication)
}

Also in build.gradle file i use

    implementation 'com.google.dagger:dagger-android:2.35.1'
    implementation 'com.google.dagger:dagger-android-support:2.35.1' // if you use the support libraries
    kapt 'com.google.dagger:dagger-android-processor:2.35.1'

plugins {
    id 'com.android.application'
    id 'kotlin-android'
    id 'kotlinx-serialization'
    id 'kotlin-kapt'
}

Application

class MyApplication : Application() {
   val myApplication = DaggerApplicationComponent.builder().build()
}

Answer 1

Since you are using Dagger Android, it seems that the way you inject the app module into the application is wrong.

Please correct it as follows:

In the app component, you should extend from AndroidInjector, specifically as follows:

app_component.kt

@Singleton
@Component(modules = [AppModule::class, DatabaseModule::class, NetworkModule::class])
interface ApplicationComponent : AndroidInjector<MyApplication> {

    @Component.Factory
    abstract class Factory : AndroidInjector.Factory<MyApplication>
}

Next is MyApplication. When you use dagger android, you should extend from DaggerApplication(). Just like that:

my_application.kt

class MyApplication : DaggerApplication() {

   override fun applicationInjector(): AndroidInjector<out DaggerApplication> {
        return DaggerAppComponent.factory().create(this)
    }
}

And finally, you should clean and rebuild your project.

And one more thing, make sure you add all the Dagger android libraries.

app build.gradle.kts

plugins {
    id("kotlin-kapt")
}

dependencies {
    implementation("com.google.dagger:dagger:2.37")
    implementation("com.google.dagger:dagger-android:2.37")
    implementation("com.google.dagger:dagger-android-support:2.37")
    kapt("com.google.dagger:dagger-android-processor:2.37")
    kapt("com.google.dagger:dagger-compiler:2.37")
}