Kotlin error: Dagger does not support injection into static fields

Question

我尝试在我的 Retrofit 项目中使用 Dagger 进行依赖注入，但是当我构建代码时它抛出这个错误：Dagger 不支持注入静态字段。有谁知道为什么我会收到此错误？我不知道我做错了什么。

MianActivity.kt:

@Inject
lateinit var  mApiService : ApiService

class MainActivity : AppCompatActivity() {



    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        var retroComponent = DaggerRetroComponent.create()
        retroComponent.inject(this)
}

RetroComponet.kt

@Singleton
@Component(modules = [ServiceBuilderModule::class])
interface RetroComponent {
    //Field Injection
    fun inject(mainActivity: MainActivity)
}

ServiceBuilder.kt

@Module
object ServiceBuilderModule {
    val baseUrl = "https://dog-facts-api.herokuapp.com"


    @Singleton
    @Provides
    fun retrofitInstance(): Retrofit {
        return Retrofit.Builder().baseUrl(baseUrl)
            .addConverterFactory(GsonConverterFactory.create())
            .build()
    }

    @Singleton
    @Provides
    fun getRetroServiceInterface(retrofit: Retrofit): ApiService {
        return retrofit.create(ApiService::class.java)
    }

ApiService.kt

interface ApiService {
    @GET("/api/v1/resources/dogs")
    suspend fun getDogFact(@Query("index") index: String): Response<List<DogFactModel>>

}

Answer 1

替换：

@Inject
lateinit var  mApiService : ApiService

class MainActivity : AppCompatActivity() {

与：

class MainActivity : AppCompatActivity() {

@Inject
lateinit var  mApiService : ApiService

mApiService 需要 MainActivity 内的属性，而不是 top-level 属性.

Kotlin error: Dagger does not support injection into static fields

Kotlin error: Dagger does not support injection into static fields

android

android-studio

kotlin

retrofit

dagger