Retrofit添加公共请求参数以及添加自定义的ConverterFactory

public class HttpBaseInterceptor implements Interceptor {    @Override    public Response intercept(Chain chain) throws IOException {        Request oldRequest = chain.request();        // 添加新的参数        HttpUrl.Builder authorizedUrlBuilder = oldRequest.url()                .newBuilder()                .scheme(oldRequest.url().scheme())                .host(oldRequest.url().host());        Request.Builder builder = oldRequest.newBuilder()                .method(oldRequest.method(), oldRequest.body());        authorizedUrlBuilder.addQueryParameter("salt", UserService.getInstance().getSalt());        authorizedUrlBuilder.addQueryParameter("user_id", UserService.getInstance().getUserid());        // 新的请求        Request newRequest = builder.url(authorizedUrlBuilder.build()).build();        Response response;        try {            response = chain.proceed(newRequest);        } catch (Exception e) {            throw e;        }        //这个是因为，如果请求下载链接的话，会导致无法获取response        BufferedSource source = response.body().source();        source.request(Long.MAX_VALUE);        return response;    }}

以下是添加自定义处理response的ConverterFactory，处理返回的结果

public class StringConverterFactory extends Converter.Factory {    public static StringConverterFactory create() {        return new StringConverterFactory();    }    @Override    public Converter<ResponseBody, ?> responseBodyConverter(Type type, Annotation[] annotations, Retrofit retrofit) {        //Retrofit并不是自动去判断返回的类型，依旧是需要指定的，能处理就处理，不能处理就返回null        if(type==String.class){            return new Converter<ResponseBody, String>() {                @Override                public String convert(ResponseBody value) throws IOException {                    return value.string();                }            };        }else return null;    }}