android – 如何使用Retrofit解决多个API端点？

概述在我的 Android项目中,我使用以下 Retrofit ApiModule作为一个API端点.请注意,我使用 Dagger注入依赖项. @Module( complete = false, library = true)public final class ApiModule { public static final String PRODUCT 在我的 Android项目中,我使用以下 Retrofit APIModule作为一个API端点.请注意,我使用 Dagger注入依赖项.

@Module(        complete = false,library = true)public final class APIModule {    public static final String PRODUCTS_BASE_URL = "https://products.com";    @ProvIDes    @Singleton    Endpoint provIDeEndpoint() {        return Endpoints.newFixedEndpoint(PRODUCTS_BASE_URL);    }    @ProvIDes    @Singleton    ObjectMapper provIDeObjectMapper() {        ObjectMapper objectMapper = new ObjectMapper();        objectMapper.setPropertyNamingStrategy(            PropertyNamingStrategy.CAMEL_CASE_TO_LOWER_CASE_WITH_UNDERscoreS);        return objectMapper;    }    @ProvIDes    @Singleton    RestAdapter provIDeRestAdapter(        Endpoint endpoint,ObjectMapper objectMapper) {        return new RestAdapter.Builder()                .setLogLevel(RestAdapter.LogLevel.NONE)                .setEndpoint(endpoint)                .setConverter(new JacksonConverter(objectMapper))                .build();    }    @ProvIDes    @Singleton    ProductsService provIDeProductsService(RestAdapter restAdapter) {        return restAdapter.create(ProductsService.class);    }}

现在,我想与之沟通另一个API(例如“http://subsIDiarIEs.com”).是否可以在重用ObjectMapper和RestAdapter时扩展给定的APIModule？或者我不应该延长它？我已经尝试复制模块了.但这涉及到我必须复制Endpoint,ObjectMapper和…… RestAdapter有一个私有的构造函数 – 所以我不能.

解决方法 我猜你可以使用named annotations：

@Module(        complete = false,library = true)public final class APIModule {    public static final String PRODUCTS_BASE_URL = "https://products.com";    public static final String SUBSIDIARIES_BASE_URL = "https://subsIDiarIEs.com";    public static final String PRODUCTS = "products";    public static final String SUBSIDIARIES = "subsIDiarIEs";    @ProvIDes    @Singleton    @named(PRODUCTS)    Endpoint provIDeProductsEndpoint() {        return Endpoints.newFixedEndpoint(PRODUCTS_BASE_URL);    }    @ProvIDes    @Singleton    @named(SUBSIDIARIES)    Endpoint provIDeSubsIDiarIEsEndpoint() {        return Endpoints.newFixedEndpoint(SUBSIDIARIES_BASE_URL);    }    @ProvIDes    @Singleton    ObjectMapper provIDeObjectMapper() {        ObjectMapper objectMapper = new ObjectMapper();        objectMapper.setPropertyNamingStrategy(            PropertyNamingStrategy.CAMEL_CASE_TO_LOWER_CASE_WITH_UNDERscoreS);        return objectMapper;    }    @ProvIDes    @Singleton    @named(PRODUCTS)    RestAdapter provIDeProductsRestAdapter(@named(PRODUCTS) Endpoint endpoint,ObjectMapper objectMapper) {        return newRestAdapterBuilder(objectMapper)                .setEndpoint(endpoint)                .build();    }    @ProvIDes    @Singleton    @named(SUBSIDIARIES)    RestAdapter provIDeSubsIDiarIEsRestAdapter(@named(SUBSIDIARIES) Endpoint endpoint,ObjectMapper objectMapper) {        return newRestAdapterBuilder(objectMapper)                .setEndpoint(endpoint)                .build();    }    @ProvIDes    @Singleton    @named(PRODUCTS)    ProductsService provIDeProductsService(@named(PRODUCTS) RestAdapter restAdapter) {        return restAdapter.create(ProductsService.class);    }    @ProvIDes    @Singleton    @named(SUBSIDIARIES)    ProductsService provIDeSubsIDiarIEsService(@named(SUBSIDIARIES) RestAdapter restAdapter) {        return restAdapter.create(ProductsService.class);    }    private RestAdapter.Builder newRestAdapterBuilder(ObjectMapper objectMapper) {        return new RestAdapter.Builder()                       .setLogLevel(RestAdapter.LogLevel.NONE)                       .setConverter(new JacksonConverter(objectMapper));    }}

现在,在您注入ProductsService的任何地方,您都需要使用@named(PRODUCTS)或@named(SUBSIDIARIES)注释依赖项,具体取决于您需要的变体.当然,除了@named注释,您还可以创建自己的自定义注释并使用它们.请参阅“限定符”下的here.

要稍微展平模块,可以将RestAdapter的创建移动到provIDe * Service()方法中,并取消提供* RestAdapter()方法.当然,除非你需要RestAdapters作为模块之外的依赖项.

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