Question

我是dagger的新手，我已经定义了我的应用程序组件

@Singleton
@Component(modules = {ApplicationModule.class})
public interface ApplicationComponent {
    void inject(BaseActivity activity);
    Context context();
}

这是我的ApplicationModule

@Module
public class ApplicationModule {

    public TipoApplication application;

    public ApplicationModule(TipoApplication application) {
        this.application = application;
    }

    @Singleton
    @Provides
    public Context provideContext(){return application.getApplicationContext();}

    @Singleton
    @Provides
    public SharedPreferences provideSharedPreferences(Context context){
        return PreferenceManager.getDefaultSharedPreferences(context);
    }

    @Singleton
    @Provides
    public Gson provideGson(){
        return new Gson();
    }

    @Singleton
    @Provides
    public SharedPrefsManager provideSharedPrefsManager(SharedPreferences sharedPreferences, Gson gson){
        return new SharedPrefsManager(sharedPreferences, gson);
    }
}

我已经创建了一个依赖的组件LocationProviderComponent

@LocationScope
@Component(dependencies = {ApplicationComponent.class},modules = {LocationProviderModule.class})
public interface LocationProviderComponent {
    void inject(LocationRepository locationRepository);
}

最后是我的LocationProviderModule

@Module
public class LocationProviderModule {

    @Singleton
    @Provides
    FusedLocationProviderClient provideFusedLocationProviderClient(Context context) {
        return LocationServices.getFusedLocationProviderClient(context);

    }

    @Singleton
    @Provides
    LocationRequest provideLocationRequest() {
        return new LocationRequest()
                .setInterval(5000)
                .setFastestInterval(60000)
                .setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
    }

    @Singleton
    @Provides
    LocationSettingsRequest provideLocationSettingRequest(LocationRequest mLocationRequest) {
        return new LocationSettingsRequest.Builder().addLocationRequest(mLocationRequest).build();
    }

}

构建时出现2个错误。

第一个找不到符号类DaggerApplicationComponent 第二

LocationProviderComponent scoped with LocationScope may not reference bindings with different scopes:
@Singleton @Provides FusedLocationProviderClient LocationProviderModule.provideFusedLocationProviderClient(android.content.Context)
@Singleton @Provides LocationRequest .module.LocationProviderModule.provideLocationRequest()

请告诉我我在做错什么。

Answer 1

任何模块的@Provides方法都只能具有与其所属组件相同的作用域。了解更多here。

在您的情况下，LocationProviderModule是LocationProviderComponent的一部分，而@LocationScope的范围是@Singleton，而该模块中的provider方法使用@Singleton @Provides FusedLocationProviderClient LocationProviderModule.provideFusedLocationProviderClient(android.content.Context) @Singleton @Provides LocationRequest.module.LocationProviderModule.provideLocationRequest()范围。这正是Dagger抱怨的：

由LocationScope范围限定的LocationProviderComponent可能无法引用具有不同范围的绑定

它也指出了问题所在：

@Singleton

您无需使用@LocationScope，而只需要在LocationProviderModule中使用node_modules/react-scripts/scripts/utils/verifyTypeScriptSetup.js。

CustomScope可能不会引用具有不同范围的绑定

1 个答案: