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public enum Season { @serializedName("0") AUTUMN,@serializedName("1") SPRING; }
从某个版本开始,GSON就能够解析这些枚举.为了确保,我这样做了:
final @R_675_10495@ng s = gson.toJson(Season.AUTUMN);
它按我的预期工作.输出为“0”.所以,我尝试在我的Retrofit服务中使用它:
@GET("index.PHP?page[api]=test") Observable<List<Month>> getMonths(@Query("season_lookup") Season season); /*..@L_398_4@me files later...*/ service.getMonths(Season.AUTUMN);
并且还添加了日志以确定其结果:
httpLoggingInterceptor httpLoggingInterceptor = new httpLoggingInterceptor(); httpLoggingInterceptor.setLevel(httpLoggingInterceptor.Level.bODY); OkhttpClient httpClient = new OkhttpClient.builder() .addInterceptor(httpLoggingInterceptor) .build();
但它失败了. @Query完全忽略@serializedName并改为使用.to@R_675_10495@ng(),所以日志显示为… / index.PHP?page [api] = test& season_lookup = AUTUMN.
我跟踪了Retrofit源代码并找到了带有行的文件requestFactoryParser:
Converter<?,@R_675_10495@ng> converter = retrofit.@R_675_10495@ngConverter(parameterType,parameterAnnotations); action = new requestAction.Query<>(name,converter,encoded);
似乎,就像它根本不关心枚举一样.在这些行之前,它将rawParameterType.isArray()测试为数组或Iterable.class.isAssignableFrom(),仅此而已.
改造实例创建是:
retrofit = new Retrofit.builder() .baseUrl(ApiConstants.API_ENDPOint) .client(httpClient) .addConverterFactory(GsonConverterFactory.create(gson)) .addCallAdapterFactory(RxJavaCallAdapterFactory.create()) .build();
gson是GsonBuilder().create().我偷看了源代码,其中有枚举的预定义ENUM_TypeAdapters.ENUM_FACTORY,所以我保持原样.
问题是我该怎么办,以防止在我的枚举上使用to@R_675_10495@ng()并使用@serializedName?我将to@R_675_10495@ng()用于其他目的.
转换器:
public class EnumRetrofitConverterFactory extends Converter.Factory { @Override public Converter<?,@R_675_10495@ng> @R_675_10495@ngConverter(Type type,Annotation[] Annotations,Retrofit retrofit) { Converter<?,@R_675_10495@ng> converter = null; if (type instanceof Class && ((Class<?>)typE).isEnum()) { converter = value -> EnumUtils.GetserializedNameValue((Enum) value); } return converter; } }
EnumUtils:
public class EnumUtils { @Nullable static public <E extends Enum<E>> @R_675_10495@ng GetserializedNameValue(E E) { @R_675_10495@ng value = null; try { value = e.getClass().getField(e.name()).getAnnotation(serializedName.class).value(); } catch (NoSuchFieldException exception) { exception.printStackTrace(); } return value; } }
改造创造:
retrofit = new Retrofit.builder() .baseUrl(ApiConstants.API_ENDPOint) .client(httpClient) .addConverterFactory(GsonConverterFactory.create(gson)) .addConverterFactory(new EnumRetrofitConverterFactory()) .addCallAdapterFactory(RxJavaCallAdapterFactory.create()) .build();
08.18更新添加kotlin类似物:
class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceStatE) setContentView(R.layout.activity_main) val httpLoggingInterceptor = httpLoggingInterceptor() httpLoggingInterceptor.level = httpLoggingInterceptor.Level.bODY val httpClient = OkhttpClient.builder() .addInterceptor(httpLoggingInterceptor) .build() val gson = GsonBuilder().create() val retrofit = Retrofit.builder() .baseUrl(Api.ENDPOint) .client(httpClient) .addConverterFactory(GsonConverterFactory.create(gson)) .addConverterFactory(EnumConverterFactory()) .build() val service = retrofit.create(Api::class.java) service.getMonths(Season.AUTUMN).enqueue(object : CallBACk<List<@R_675_10495@ng>> { override fun onFailure(call: Call<List<@R_675_10495@ng>>?,t: Throwable?) { /* ignore */ } override fun onResponse(call: Call<List<@R_675_10495@ng>>?,response: Response<List<@R_675_10495@ng>>?) { /* ignore */ } }) } } class EnumConverterFactory : Converter.Factory() { override fun @R_675_10495@ngConverter(type: Type?,Annotations: Array<out Annotation>?,retrofit: Retrofit?): Converter<*,@R_675_10495@ng>? { if (type is Class<*> && type.isEnum) { return Converter<Any?,@R_675_10495@ng> { value -> getserializedNameValue(value as Enum<*>) } } return null } } fun <E : Enum<*>> getserializedNameValue(e: E): @R_675_10495@ng { try { return e.javaClass.getField(e.Name).getAnnotation(serializedName::class.java).value } catch (exception: NoSuchFieldException) { exception.printStackTrace() } return "" } enum class Season { @serializedName("0") AUTUMN,@serializedName("1") SPRING } interface Api { @GET("index.PHP?page[api]=test") fun getMonths(@Query("season_lookup") season: Season): Call<List<@R_675_10495@ng>> companion object { const val ENDPOINT = "http://127.0.0.1" } }
在日志中,您将看到:
D/Okhttp: --> GET http://127.0.0.1/index.PHP?page[api]=test&season_lookup=0 D/Okhttp: --> END GET D/Okhttp: <-- http Failed: java.net.ConnectException: Failed to connect to /127.0.0.1:80
使用的依赖项是:
implementation 'com.squareup.retrofit2:retrofit:2.4.0' implementation 'com.google.code.gson:gson:2.8.5' implementation 'com.squareup.okhttp3:logging-interceptor:3.11.0' implementation 'com.squareup.retrofit2:converter-gson:2.4.0'
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