Question

我有一个使用Dagger 2进行依赖注入的类。现在我想切换到Koin进行依赖注入。 Koin中有模块，我想在课堂上做一个模块，或者什么都可以做。

@Module
class NetModule(private val baseUrl: String) {

@Provides
@Singleton
fun providesOkHttpClient(
        httpLoggingInterceptor: HttpLoggingInterceptor): OkHttpClient = OkHttpClient.Builder().addInterceptor(
        httpLoggingInterceptor).build()

@Provides
@Singleton
fun provideLoggingInterceptor(): HttpLoggingInterceptor {
    val interceptor = HttpLoggingInterceptor(
            HttpLoggingInterceptor.Logger { message -> Logger.d("NETWORK: $message") })
    interceptor.level = HttpLoggingInterceptor.Level.NONE
    return interceptor
}

@Provides
@Singleton
fun providesMoshi(): Moshi = Moshi.Builder().add(KotlinJsonAdapterFactory()).build()

@Provides
@Singleton
fun providesRetrofit(okHttpClient: OkHttpClient, moshi: Moshi): Retrofit {
    return Builder().client(okHttpClient).baseUrl(baseUrl)
            .addConverterFactory(GsonConverterFactory.create())
            .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
            .build()
}

@Provides
@Singleton
fun providesApiInterface(retrofit: Retrofit): ApiInterface = retrofit.create(
        ApiInterface::class.java)
}

Answer 1

Koin 使用DSL来描述模块。通常，您会在顶层声明模块本身。由于您需要提供baseUrl，因此必须为其创建工厂。

@Provides注释是完全不相关的，但是@Singleton需要翻译，并使用single进行翻译。要检索依赖关系，只需调用get()。

fun netModule(baseUrl: String) = module {

    single {
        HttpLoggingInterceptor(
            HttpLoggingInterceptor.Logger { message ->
                Logger.d("NETWORK: $message")
        }).apply {
            level = HttpLoggingInterceptor.Level.NONE
        }
    }

    single {
        OkHttpClient.Builder()
            .addInterceptor(get<HttpLoggingInterceptor>())
            .build()
    }


    single {
        Moshi.Builder()
            .add(KotlinJsonAdapterFactory())
            .build()
    }

    single {
        Retrofit.Builder()
            .client(get())
            .baseUrl(baseUrl)
            .addConverterFactory(GsonConverterFactory.create())
            .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
            .build()
    }

    single { get<Retrofit>().create(ApiInterface::class.java) }    
}

Koin依赖注入

1 个答案: