Retrofit直接获得Json数据

 /**
     *
     * @param
     * @return
     */
    @GET("")
    Observable<ResponseBody> docHis_(@Url String url);

 //log
    public static ApiServer getApiServer(Context context){
        if(apiServer == null){
            apiServer = new Retrofit.Builder().baseUrl(baseURL)
                    .client(getClient(context))
                    .addConverterFactory(GsonConverterFactory.create())
                    .addConverterFactory(ScalarsConverterFactory.create())
                    .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
                    .build()
                    .create(ApiServer.class);
        }
        return apiServer;
    }

private static OkHttpClient getClient(Context context){
        if(client == null){
            client = new OkHttpClient.Builder()
                    .addInterceptor(new HttpLoggingInterceptor().setLevel(HttpLoggingInterceptor.Level.BODY))
                    .addInterceptor(new ReceivedCookiesInterceptor(context))
                    .addInterceptor(new AddCookiesInterceptor(context))

                    .build();
        }
        return client;
    }

NetWork.getApiServer(this).docHis_("api/doc/his/" + id)
                .observeOn(AndroidSchedulers.mainThread())
                .subscribeOn(Schedulers.io())
                .subscribe(new Observer<ResponseBody>() {

                    @Override
                    public void onError(Throwable e) {
                    }

                    @Override
                    public void onComplete() {

                    }

                    @Override
                    public void onSubscribe(Disposable d) {

                    }

                    @Override
                    public void onNext(ResponseBody responseBody) {
                        try {
                            Log.d("josn_test", responseBody.string());
                        } catch (IOException e) {
                             e.printStackTrace();
                    }
            }
        });