Manually Parse Part Of A Response When Using Retrofit

I'm working with a REST API that returns a JSON document that starts as follows and includes a 'collection' of items with string IDs like 'ABC'. Note the 'routes' field, which cont

Solution 1:

It turns out that Retrofit's use of Gson by default makes it fairly easy to add a custom deserialiser to handle the portion of the JSON document that was the problem.

RestAdapterrestAdapter=newRestAdapter.Builder()
        .setEndpoint(ApiDefinition.BASE_URL)
        .setConverter(getGsonConverter())
        .build();

public Converter getGsonConverter() {
    Gsongson=newGsonBuilder()
            .registerTypeAdapter(RouteList.class, newRouteTypeAdapter())
            .create();
    returnnewGsonConverter(gson);
}


publicclassRouteTypeAdapterimplementsJsonDeserializer<RouteList> {
    @Overridepublic RouteList deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)throws JsonParseException {
        Gsongson=newGson();
        RouteListrouteList=newRouteList();
        JsonObjectjsonObject= json.getAsJsonObject();
        for (Map.Entry<String,JsonElement> elementJson : jsonObject.entrySet()){
            RouteListwardsRoutes= gson.fromJson(elementJson.getValue().getAsJsonArray(), RouteList.class);
            routeList.addAll(wardsRoutes);
        }
        return routeList;
    }

}

Solution 2:

After calling RestService, don't use Model Name as argument, you have to use Default Response class from retrofit library.

RestService Method

@FormUrlEncoded@POST(GlobalVariables.LOGIN_URL)
    void Login(@Field("email") String key, @Field("password") String value, Callback<Response> callback);

Calling method in Activity

getService().Login(email, password, newMyCallback<Response>(context, true, null)
{
    @Overridepublicvoidfailure(RetrofitError arg0)
     {
        // TODO Auto-generated method stub
        UtilitySingleton.dismissDialog((BaseActivity<?>) context);
        System.out.println(arg0.getResponse());
      }

    @Overridepublicvoidsuccess(Response arg0, Response arg1)
    {
         Stringresult=null;
         StringBuildersb=null;
         InputStreamis=null;
         try
         {
                is = arg1.getBody().in();
                BufferedReaderreader=newBufferedReader(newInputStreamReader(is));
                sb = newStringBuilder();
                Stringline=null;
                while ((line = reader.readLine()) != null)
                {
                    sb.append(line + "\n");
                    result = sb.toString();
                    System.out.println("Result :: " + result);
                }
            }
            catch (Exception e)
            {
                e.printStackTrace();
            }
        }
    });