Dagger2在依赖模块中注入@Named @Provides？

Question

我使用https://guides.codepath.com/android/Dependency-Injection-with-Dagger-2的 dagger2演示.我想使用缓存和非缓存的改进调用.我在NetModule.java中创建

@Provides @Named("cached")
@Singleton
OkHttpClient provideOkHttpClient(Cache cache) {
    OkHttpClient okHttpClient = new OkHttpClient.Builder()
            .cache(cache)
            .build();
    return okHttpClient;
}

@Provides @Named("non_cached")
@Singleton
OkHttpClient provideOkHttpClientNonCached() {
    OkHttpClient okHttpClient = new OkHttpClient.Builder()
            .build();
    return okHttpClient;
}

GitHubModule.java依赖于NetModule.java.我的GitHubComponent.java

@UserScope
@Component(dependencies = NetComponent.class, modules = GitHubModule.class)
public interface GitHubComponent {
void inject(DemoDaggerActivity activity);
}

我的NetComponent.java

@Singleton
@Component(modules={ApplicationModule.class, NetModule.class})
public interface NetComponent {
// downstream components need these exposed
Retrofit retrofit();
OkHttpClient okHttpClient();
SharedPreferences sharedPreferences();
}

在我的DemoDaggerActivity.java注入改造中:

@Inject @Named("cached")
OkHttpClient mOkHttpClient;

@Inject
Retrofit mRetrofit;

重建项目后,我收到错误:

我在哪里可以告诉匕首,我想使用缓存或非缓存改造？

Answer 1

您的Retrofit提供程序应该使用@NamedOkHttpClient的注释,例如:

@Provides
@Singleton
public Retrofit provideRetrofit(@Named("cached") OkHttpClient okHttpClient)
{
    return new Retrofit.Builder()
            .baseUrl("...")
            .addConverterFactory(GsonConverterFactory.create())
            .client(okHttpClient)
            .build();
}