Android改造2多个转换器(Gson & SimpleXML)错误

ohtdti5x  于 2022-11-06  发布在  Android
关注(0)|答案(3)|浏览(220)

在我的项目中（我正在使用Dagger 2，Retrofit 2 & OkHTTP，RxAndroid）我有2个不同的API调用。从一个我接收JSON，从其他- XML。我研究了this link，并添加了2个转换器，我需要我的Retrofit.Builder（）：

  1. @Provides
  2. @Singleton
  3. public Gson providesGson() {
  4.     return new GsonBuilder().create();
  5. }
  7. @Provides
  8. @Singleton
  9. public Retrofit providesRetrofit(@NonNull OkHttpClient okHttpClient, @NonNull Gson gson) {
  10.     return new Retrofit.Builder()
  11.             .baseUrl(ConstantsManager.BASE_URL)
  12.             .client(okHttpClient)
  13.             .addConverterFactory(SimpleXmlConverterFactory.create())
  14.             .addConverterFactory(GsonConverterFactory.create(gson))
  15.             .addCallAdapterFactory(RxJavaCallAdapterFactory.create())
  16.             .build();
  17. }

但是，当我收到JSON（XML得到正确转换）时，我得到以下内容：

  1. D/OkHttp: {"date":"20.11.2016","bank":"PB","baseCurrency":980,"baseCurrencyLit":"UAH","exchangeRate":[{"baseCurrency":"UAH","currency":"AUD","saleRateNB":19.4452740,"purchaseRateNB":19.4452740},{"baseCurrency":"UAH","currency":"CAD","saleRateNB":19.4047320,"purchaseRateNB":19.4047320},{"baseCurrency":"UAH","currency":"CZK","saleRateNB":1.0322170,"purchaseRateNB":1.0322170,"saleRate":1.0800000,"purchaseRate":0.9800000},{"baseCurrency":"UAH","currency":"DKK","saleRateNB":3.7519280,"purchaseRateNB":3.7519280},{"baseCurrency":"UAH","currency":"HUF","saleRateNB":0.0902556,"purchaseRateNB":0.0902556},{"baseCurrency":"UAH","currency":"ILS","saleRateNB":6.7524710,"purchaseRateNB":6.7524710,"saleRate":7.0000000,"purchaseRate":6.3000000},{"baseCurrency":"UAH","currency":"JPY","saleRateNB":0.2384005,"purchaseRateNB":0.2384005,"saleRate":0.2500000,"purchaseRate":0.2200000},{"baseCurrency":"UAH","currency":"LVL","saleRateNB":0.2384005,"purchaseRateNB":0.2384005},{"baseCurrency":"UAH","currency":"LTL","saleRateNB":0.2384005,"purchaseRateNB":0.2384005},{"baseCurrency":"UAH","currency":"NOK","saleRateNB":3.0724120,"purchaseRateNB":3.0724120,"saleRate":3.2000000,"purchaseRate":2.9000000},{"baseCurrency":"UAH","currency":"SKK","saleRateNB":3.0724120,"purchaseRateNB":3.0724120},{"baseCurrency":"UAH","currency":"SEK","saleRateNB":2.8384710,"purchaseRateNB":2.8384710},{"baseCurrency":"UAH","currency":"CHF","saleRateNB":26.0049080,"purchaseRateNB":26.0049080,"saleRate":27.5000000,"purchaseRate":25.0000000},{"baseCurrency":"UAH","currency":"RUB","saleRateNB":0.4013400,"purchaseRateNB":0.4013400,"saleRate":0.4200000,"purchaseRate":0.4000000},{"baseCurrency":"UAH","currency":"GBP","saleRateNB":32.4460750,"purchaseRateNB":32.4460750,"saleRate":34.0000000,"purchaseRate":31.0000000},{"baseCurrency":"UAH","currency":"USD","saleRateNB":26.0534380,"purchaseRateNB":26.0534380,"saleRate":27.0000000,"purchaseRate":26.6000000},{"baseCurrency":"UAH","currency":"BYR","saleRateNB":26.0534380,"purchaseRateNB":26.0534380},{"baseCurrency":"UAH","currency":"EUR","saleRateNB":27.9214700,"purchaseRateNB":27.9214700,"saleRate":28.6000000,"purchaseRate":28.2000000},{"baseCurrency":"UAH","currency":"GEL","saleRateNB":10.5921530,"purchaseRateNB":10.5921530},{"baseCurrency":"UAH","currency":"PLZ","saleRateNB":6.2818280,"purchaseRateNB":6.2818280,"saleRate":6.6000000,"purchaseRate":5.9000000}]}
  2. D/OkHttp: <-- END HTTP (2377-byte body)
  3. E/DateCurrencyService: Error while loading data occurred!
  4.                    java.lang.RuntimeException: org.xmlpull.v1.XmlPullParserException: Unexpected token (position:TEXT {"date":"20.11.2...@1:2378 in java.io.InputStreamReader@2ec8965) 
  5.                        at retrofit2.converter.simplexml.SimpleXmlResponseBodyConverter.convert(SimpleXmlResponseBodyConverter.java:44)
  6.                        at retrofit2.converter.simplexml.SimpleXmlResponseBodyConverter.convert(SimpleXmlResponseBodyConverter.java:23)
  7.                        at retrofit2.ServiceMethod.toResponse(ServiceMethod.java:117)
  8.                        at retrofit2.OkHttpCall.parseResponse(OkHttpCall.java:211)
  9.                        at retrofit2.OkHttpCall.execute(OkHttpCall.java:174)
  10.                        at retrofit2.adapter.rxjava.RxJavaCallAdapterFactory$RequestArbiter.request(RxJavaCallAdapterFactory.java:171)
  11.                        at rx.internal.operators.OperatorSubscribeOn$1$1$1.request(OperatorSubscribeOn.java:80)
  12.                        at rx.Subscriber.setProducer(Subscriber.java:209)
  13.                        at rx.Subscriber.setProducer(Subscriber.java:205)
  14.                        at rx.Subscriber.setProducer(Subscriber.java:205)
  15.                        at rx.internal.operators.OperatorSubscribeOn$1$1.setProducer(OperatorSubscribeOn.java:76)
  16.                        at rx.Subscriber.setProducer(Subscriber.java:205)
  17.                        at retrofit2.adapter.rxjava.RxJavaCallAdapterFactory$CallOnSubscribe.call(RxJavaCallAdapterFactory.java:152)
  18.                        at retrofit2.adapter.rxjava.RxJavaCallAdapterFactory$CallOnSubscribe.call(RxJavaCallAdapterFactory.java:138)
  19.                        at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:50)
  20.                        at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
  21.                        at rx.Observable.unsafeSubscribe(Observable.java:8666)
  22.                        at rx.internal.operators.OperatorSubscribeOn$1.call(OperatorSubscribeOn.java:94)
  23.                        at rx.internal.schedulers.CachedThreadScheduler$EventLoopWorker$1.call(CachedThreadScheduler.java:220)
  24.                        at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:55)
  25.                        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:428)
  26.                        at java.util.concurrent.FutureTask.run(FutureTask.java:237)
  27.                        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:272)
  28.                        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133)
  29.                        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607)
  30.                        at java.lang.Thread.run(Thread.java:761)
  31.                     Caused by: org.xmlpull.v1.XmlPullParserException: Unexpected token (position:TEXT {"date":"20.11.2...@1:2378 in java.io.InputStreamReader@2ec8965) 
  32.                        at org.kxml2.io.KXmlParser.next(KXmlParser.java:432)
  33.                        at org.kxml2.io.KXmlParser.next(KXmlParser.java:313)
  34.                        at org.simpleframework.xml.stream.PullReader.read(PullReader.java:105)
  35.                        at org.simpleframework.xml.stream.PullReader.next(PullReader.java:89)
  36.                        at org.simpleframework.xml.stream.NodeReader.readElement(NodeReader.java:111)
  37.                        at org.simpleframework.xml.stream.NodeReader.readRoot(NodeReader.java:85)
  38.                        at org.simpleframework.xml.stream.NodeBuilder.read(NodeBuilder.java:84)
  39.                        at org.simpleframework.xml.stream.NodeBuilder.read(NodeBuilder.java:71)
  40.                        at org.simpleframework.xml.core.Persister.read(Persister.java:562)
  41.                        at retrofit2.converter.simplexml.SimpleXmlResponseBodyConverter.convert(SimpleXmlResponseBodyConverter.java:36)
  42.                        at retrofit2.converter.simplexml.SimpleXmlResponseBodyConverter.convert(SimpleXmlResponseBodyConverter.java:23) 
  43.                        at retrofit2.ServiceMethod.toResponse(ServiceMethod.java:117) 
  44.                        at retrofit2.OkHttpCall.parseResponse(OkHttpCall.java:211) 
  45.                        at retrofit2.OkHttpCall.execute(OkHttpCall.java:174) 
  46.                        at retrofit2.adapter.rxjava.RxJavaCallAdapterFactory$RequestArbiter.request(RxJavaCallAdapterFactory.java:171) 
  47.                        at rx.internal.operators.OperatorSubscribeOn$1$1$1.request(OperatorSubscribeOn.java:80) 
  48.                        at rx.Subscriber.setProducer(Subscriber.java:209) 
  49.                        at rx.Subscriber.setProducer(Subscriber.java:205) 
  50.                        at rx.Subscriber.setProducer(Subscriber.java:205) 
  51.                        at rx.internal.operators.OperatorSubscribeOn$1$1.setProducer(OperatorSubscribeOn.java:76) 
  52.                        at rx.Subscriber.setProducer(Subscriber.java:205) 
  53.                        at retrofit2.adapter.rxjava.RxJavaCallAdapterFactory$CallOnSubscribe.call(RxJavaCallAdapterFactory.java:152) 
  54.                        at retrofit2.adapter.rxjava.RxJavaCallAdapterFactory$CallOnSubscribe.call(RxJavaCallAdapterFactory.java:138) 
  55.                        at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:50) 
  56.                        at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30) 
  57.                        at rx.Observable.unsafeSubscribe(Observable.java:8666) 
  58.                        at rx.internal.operators.OperatorSubscribeOn$1.call(OperatorSubscribeOn.java:94) 
  59.                        at rx.internal.schedulers.CachedThreadScheduler$EventLoopWorker$1.call(CachedThreadScheduler.java:220) 
  60.                        at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:55) 
  61.                        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:428) 
  62.                        at java.util.concurrent.FutureTask.run(FutureTask.java:237) 
  63.                        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:272) 
  64.                        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133) 
  65.                        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607) 
  66.                        at java.lang.Thread.run(Thread.java:761) 

根据我的理解，SimpleXMLConverter会尝试转换我从第二次调用中获得的JSON响应（如前所述，来自第一次调用的XML响应会得到正确的转换）。我需要做的是用适当的转换器转换每个响应（用SimpleXMLConverter转换XML响应，用GsonConverter转换JSON响应）。
如果我试图切换添加转换器的顺序，在接收XML时会出现类似的错误（因为Gson转换器显然试图转换XML响应）：

  1. D/OkHttp: <exchangerate><exchangerate ccy="EUR" ccy_name_ru="Евро                               " ccy_name_ua="Євро                               " ccy_name_en="Euro                               " base_ccy="UA" buy="27247312" unit="100.00000" date="2016.11.29" /><exchangerate ccy="RUR" ccy_name_ru="Российский рубль                   " ccy_name_ua="Росiйський рубль                   " ccy_name_en="Russian Rouble                     " base_ccy="UA" buy="39810" unit="10.00000" date="2016.11.29" /><exchangerate ccy="USD" ccy_name_ru="Доллар США                         " ccy_name_ua="Долар США                          " ccy_name_en="US Dollar                          " base_ccy="UA" buy="25724426" unit="100.00000" date="2016.11.29" /></exchangerate>
  2. D/OkHttp: <-- END HTTP (799-byte body)
  3. E/SyncService: Error while loading data occurred!
  4.            com.google.gson.stream.MalformedJsonException: Use JsonReader.setLenient(true) to accept malformed JSON at line 1 column 1 path $
  5.                at com.google.gson.stream.JsonReader.syntaxError(JsonReader.java:1559)
  6.                at com.google.gson.stream.JsonReader.checkLenient(JsonReader.java:1401)
  7.                at com.google.gson.stream.JsonReader.doPeek(JsonReader.java:593)
  8.                at com.google.gson.stream.JsonReader.peek(JsonReader.java:425)
  9.                at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:205)
  10.                at retrofit2.converter.gson.GsonResponseBodyConverter.convert(GsonResponseBodyConverter.java:37)
  11.                at retrofit2.converter.gson.GsonResponseBodyConverter.convert(GsonResponseBodyConverter.java:25)
  12.                at retrofit2.ServiceMethod.toResponse(ServiceMethod.java:117)
  13.                at retrofit2.OkHttpCall.parseResponse(OkHttpCall.java:211)
  14.                at retrofit2.OkHttpCall.execute(OkHttpCall.java:174)
  15.                at retrofit2.adapter.rxjava.RxJavaCallAdapterFactory$RequestArbiter.request(RxJavaCallAdapterFactory.java:171)
  16.                at rx.internal.operators.OperatorSubscribeOn$1$1$1.request(OperatorSubscribeOn.java:80)
  17.                at rx.Subscriber.setProducer(Subscriber.java:209)
  18.                at rx.Subscriber.setProducer(Subscriber.java:205)
  19.                at rx.Subscriber.setProducer(Subscriber.java:205)
  20.                at rx.internal.operators.OperatorSubscribeOn$1$1.setProducer(OperatorSubscribeOn.java:76)
  21.                at rx.Subscriber.setProducer(Subscriber.java:205)
  22.                at retrofit2.adapter.rxjava.RxJavaCallAdapterFactory$CallOnSubscribe.call(RxJavaCallAdapterFactory.java:152)
  23.                at retrofit2.adapter.rxjava.RxJavaCallAdapterFactory$CallOnSubscribe.call(RxJavaCallAdapterFactory.java:138)
  24.                at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:50)
  25.                at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
  26.                at rx.Observable.unsafeSubscribe(Observable.java:8666)
  27.                at rx.internal.operators.OperatorSubscribeOn$1.call(OperatorSubscribeOn.java:94)
  28.                at rx.internal.schedulers.CachedThreadScheduler$EventLoopWorker$1.call(CachedThreadScheduler.java:220)
  29.                at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:55)
  30.                at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:428)
  31.                at java.util.concurrent.FutureTask.run(FutureTask.java:237)
  32.                at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:272)
  33.                at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133)
  34.                at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607)
  35.                at java.lang.Thread.run(Thread.java:761)

如何使每个转换器转换相应的响应？
**UPD：**按照Marcin Jedynak的建议，我执行了以下操作：

1)添加了自定义Converter类：

  1. public class RetrofitUniversalConverter extends Converter.Factory {
  3.     private final Converter.Factory xml;
  4.     private final Converter.Factory json;
  6.     @Inject
  7.     public RetrofitUniversalConverter(@NonNull Gson gson) {
  8.         xml = SimpleXmlConverterFactory.create();
  9.         json = GsonConverterFactory.create(gson);
  10.     }
  12.     @Override
  13.     public Converter<ResponseBody, ?> responseBodyConverter(Type type, Annotation[] annotations, Retrofit retrofit) {
  15.         for (Annotation annotation : annotations) {
  17.             if (annotation.getClass() == Xml.class) {
  18.                 return xml.responseBodyConverter(type, annotations, retrofit);
  19.             }
  21.             if (annotation.getClass() == Json.class) {
  22.                 return json.responseBodyConverter(type, annotations, retrofit);
  23.             }
  25.         }
  27.         return null;
  28.     }
  29. }

2)重写了我的Retrofit模块：

  1. @Provides
  2. @Singleton
  3. public Gson providesGson() {
  4.     return new GsonBuilder().create();
  5. }
  7. @Provides
  8. @Singleton
  9. public Retrofit providesRetrofit(@NonNull OkHttpClient okHttpClient,
  10.                                  @NonNull RetrofitUniversalConverter converter) {
  11.     return new Retrofit.Builder()
  12.             .baseUrl(ConstantsManager.BASE_URL)
  13.             .client(okHttpClient)
  14.             .addConverterFactory(converter)
  15.             .addCallAdapterFactory(RxJavaCallAdapterFactory.create())
  16.             .build();
  17. }

3)然后，我在API接口中添加了注解：

  1. public interface PrivatbankApi {
  3.     @GET @Xml
  4.     Observable<CurrentRates> loadCurrentRates(@NonNull @Url String url);
  6.     @GET("exchange_rates") @Json
  7.     Observable<DateRates> loadDateRates(@NonNull @Query("json") Boolean json, @NonNull @Query("date") String date);
  9. }

但是我遇到了一个例外：

  1. E/AndroidRuntime: FATAL EXCEPTION: main
  2.               Process: com.vedmedenko.exchangerates, PID: 5432
  3.               java.lang.RuntimeException: Unable to start service com.vedmedenko.exchangerates.core.services.SyncService@68cf714 with Intent { flg=0x4 cmp=com.vedmedenko.exchangerates/.core.services.SyncService (has extras) }: java.lang.IllegalArgumentException: Unable to create converter for class com.vedmedenko.exchangerates.core.rest.models.current.CurrentRates
  4.                   for method PrivatbankApi.loadCurrentRates
  5.                   at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:3343)
  6.                   at android.app.ActivityThread.-wrap21(ActivityThread.java)
  7.                   at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1582)
  8.                   at android.os.Handler.dispatchMessage(Handler.java:102)
  9.                   at android.os.Looper.loop(Looper.java:154)
  10.                   at android.app.ActivityThread.main(ActivityThread.java:6119)
  11.                   at java.lang.reflect.Method.invoke(Native Method)
  12.                   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
  13.                   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
  14.                Caused by: java.lang.IllegalArgumentException: Unable to create converter for class com.vedmedenko.exchangerates.core.rest.models.current.CurrentRates
  15.                   for method PrivatbankApi.loadCurrentRates
  16.                   at retrofit2.ServiceMethod$Builder.methodError(ServiceMethod.java:720)
  17.                   at retrofit2.ServiceMethod$Builder.createResponseConverter(ServiceMethod.java:706)
  18.                   at retrofit2.ServiceMethod$Builder.build(ServiceMethod.java:167)
  19.                   at retrofit2.Retrofit.loadServiceMethod(Retrofit.java:166)
  20.                   at retrofit2.Retrofit$1.invoke(Retrofit.java:145)
  21.                   at java.lang.reflect.Proxy.invoke(Proxy.java:813)
  22.                   at $Proxy0.loadCurrentRates(Unknown Source)
  23.                   at com.vedmedenko.exchangerates.core.DataManager.loadCurrentRates(DataManager.java:29)
  24.                   at com.vedmedenko.exchangerates.core.services.SyncService.onStartCommand(SyncService.java:81)
  25.                   at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:3326)
  26.                     ... 8 more
  27.                Caused by: java.lang.IllegalArgumentException: Could not locate ResponseBody converter for class com.vedmedenko.exchangerates.core.rest.models.current.CurrentRates.
  28.                 Tried:
  29.                  * retrofit2.BuiltInConverters
  30.                  * com.vedmedenko.exchangerates.core.rest.converters.RetrofitUniversalConverter
  31.                   at retrofit2.Retrofit.nextResponseBodyConverter(Retrofit.java:346)
  32.                   at retrofit2.Retrofit.responseBodyConverter(Retrofit.java:308)
  33.                   at retrofit2.ServiceMethod$Builder.createResponseConverter(ServiceMethod.java:704)
  34.                     ... 16 more
Gson

3条答案

按热度按时间
vaj7vani

vaj7vani1#

检查Jake Wharton的this presentation，在那里他完全解决了你描述的问题（并提出了许多其他有用的技巧）。
简而言之，他建议创建表示您期望的数据格式的注解（例如，在您的例子中为Json和Xml），并相应地注解您的API调用。然后定义您的自定义ConverterFactory，根据遇到的注解将其委托给GsonConverterFactory或SimpleXmlConverterFactory。
但是，您需要在Jake的解决方案中添加两项内容。
首先，不要忘记使用@Retention(RetentionPolicy.RUNTIME)对注解进行注解，否则在运行时不会保留这些注解：

  1. @Retention(RetentionPolicy.RUNTIME)
  2. public @interface Json {}

第二，在responseBodyConverter方法中接收到的注解实际上并不是您的注解，它们是系统创建的注解的代理。因此，您需要替换条件：

  1. annotation.getClass() == Json.class
  2. annotation.getClass() == Xml.class

与：

  1. annotation.annotationType() == Json.class
  2. annotation.annotationType() == Xml.class
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o2rvlv0m

o2rvlv0m2#

感谢@Marcin和推荐人。
下面是根据Marcin的注解（如果没有找到注解，则添加Json factory作为默认值）调整的Jake Warton所提演示文稿中的代码：

  1. public class AnnotatedConverterFactory extends Converter.Factory {
  3.     @Retention(RetentionPolicy.RUNTIME)
  4.     public @interface Json {}
  6.     @Retention(RetentionPolicy.RUNTIME)
  7.     public @interface Xml {}
  9.     final Map<Class<?>, Converter.Factory> mFactoryMap;
  11.     public AnnotatedConverterFactory(Map<Class<?>, Converter.Factory> factoryMap) {
  12.         mFactoryMap = factoryMap;
  13.     }
  15.     @Override
  16.     public Converter<ResponseBody, ?> responseBodyConverter(Type type, Annotation[] annotations, Retrofit retrofit) {
  17.         for(Annotation annotation : annotations){
  18.             Converter.Factory factory = mFactoryMap.get(annotation.annotationType());
  19.             if(factory != null){
  20.                 return factory.responseBodyConverter(type, annotations, retrofit);
  21.             }
  22.         }
  23.         //try to default to json in case no annotation on current method was found
  24.         Converter.Factory jsonFactory = mFactoryMap.get(Json.class);
  25.         if(jsonFactory != null){
  26.             return jsonFactory.responseBodyConverter(type, annotations, retrofit);
  27.         }
  28.         return null;
  29.     }
  31.     static class Builder {
  32.         Map<Class<?>, Converter.Factory> mFactoryMap = new LinkedHashMap<>();
  34.         Builder add(Class<? extends Annotation> factoryType, Converter.Factory factory){
  35.             if(factoryType == null) throw new NullPointerException("factoryType is null");
  36.             if(factory == null) throw new NullPointerException("factory is null");
  37.             mFactoryMap.put(factoryType, factory);
  38.             return this;
  39.         }
  40.         public AnnotatedConverterFactory build(){
  41.             return new AnnotatedConverterFactory(mFactoryMap);
  42.         }
  44.     }
  45. }

用法：

  1. interface RetrofitService{
  2.         @POST
  3.         @AnnotatedConverterFactory.Xml
  4.         Call<Envelope> someApiMethodWithXmlRespoonse(@Url String url, @Body Envelope envelope);
  6.         @POST
  7.         @AnnotatedConverterFactory.Json
  8.         Call<Envelope> someApiMethodWithJsonRespoonse(@Url String url, @Body Model model);
  9.     }

示例化改造：

  1. Retrofit retrofit = new Retrofit.Builder()
  2.                 .baseUrl(BASE_URL)
  3.                 .client(mOkHttpClient)
  4.                 .addConverterFactory(new AnnotatedConverterFactory.Builder()
  5.                         .add(AnnotatedConverterFactory.Xml.class, SimpleXmlConverterFactory.createNonStrict())
  6.                         .add(AnnotatedConverterFactory.Json.class, GsonConverterFactory.create(mGson))
  7.                         .build()
  8.                 )
  10.         mRetrofitService = retrofit.create(RetrofitService.class);
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nkkqxpd9

nkkqxpd93#

对于Kotlin用户来说，这要简单得多

  1. @MustBeDocumented
  2. @Target(
  3.     AnnotationTarget.FUNCTION,
  4.     AnnotationTarget.PROPERTY_GETTER,
  5.     AnnotationTarget.PROPERTY_SETTER
  6. )
  7. @Retention(AnnotationRetention.RUNTIME)
  8. annotation class XmlResponse
  10. @MustBeDocumented
  11. @Target(
  12.     AnnotationTarget.FUNCTION,
  13.     AnnotationTarget.PROPERTY_GETTER,
  14.     AnnotationTarget.PROPERTY_SETTER
  15. )
  16. @Retention(AnnotationRetention.RUNTIME)
  17. annotation class JsonResponse
  19. class MultipleConverterFactory(private val factories: Map<Class<*>, Converter.Factory>) : Converter.Factory() {
  21.     override fun responseBodyConverter(
  22.         type: Type,
  23.         annotations: Array<Annotation>,
  24.         retrofit: Retrofit
  25.     ): Converter<ResponseBody, *>? {
  26.         return annotations.mapNotNull { factories[it.annotationClass.javaObjectType] }
  27.             .getOrNull(0)
  28.             ?.responseBodyConverter(type, annotations, retrofit)
  29.     }
  31.     class Builder {
  33.         private val factories = hashMapOf<Class<*>, Converter.Factory>()
  35.         fun setXmlConverterFactory(converterFactory: Converter.Factory): Builder {
  36.             factories[XmlResponse::class.java] = converterFactory
  37.             return this
  38.         }
  40.         fun setJsonConverterFactory(converterFactory: Converter.Factory): Builder {
  41.             factories[JsonResponse::class.java] = converterFactory
  42.             return this
  43.         }
  45.         @Suppress("unused")
  46.         fun addCustomConverterFactory(
  47.             annotation: Class<out Annotation>,
  48.             converterFactory: Converter.Factory
  49.         ): Builder {
  50.             factories[annotation] = converterFactory
  51.             return this
  52.         }
  54.         fun build(): MultipleConverterFactory {
  55.             return MultipleConverterFactory(factories)
  56.         }
  57.     }
  58. }

和用法

  1. Retrofit.Builder()
  2.     // ...
  3.     .addConverterFactory(
  4.         MultipleConverterFactory.Builder()
  5.             .setXmlConverterFactory(TikXmlConverterFactory.create(instance()))
  6.             .setJsonConverterFactory(GsonConverterFactory.create(instance()))
  7.             .build()
  8.     )
  9.     .build()
  11. // some API endpoint
  12. @XmlResponse
  13. @GET
  14. suspend fun getXml(
  15.     @Url url: String
  16. ): MyModel
展开查看全部
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