How to get string response from Retrofit2?

Question

I am doing android, looking for a way to do a super basic http GET/POST request. I keep getting an error:

java.lang.IllegalArgumentException: Unable to creat         


        

Answer 1

To get the response as a String, you have to write a converter and pass it when initializing Retrofit.

Here are the steps.

Initializing retrofit.

Retrofit retrofit = new Retrofit.Builder()
                .baseUrl(API_URL_BASE)
                .addConverterFactory(new ToStringConverterFactory())
                .build();
        return retrofit.create(serviceClass);

Converter class for converting Retrofit's ResponseBody to String

public class ToStringConverterFactory extends Converter.Factory {
    private static final MediaType MEDIA_TYPE = MediaType.parse("text/plain");


    @Override
    public Converter responseBodyConverter(Type type, Annotation[] annotations,
                                                            Retrofit retrofit) {
        if (String.class.equals(type)) {
            return new Converter() {
                @Override
                public String convert(ResponseBody value) throws IOException
                {
                    return value.string();
                }
            };
        }
        return null;
    }

    @Override
    public Converter requestBodyConverter(Type type, Annotation[] parameterAnnotations,
                                                          Annotation[] methodAnnotations, Retrofit retrofit) {

        if (String.class.equals(type)) {
            return new Converter() {
                @Override
                public RequestBody convert(String value) throws IOException {
                    return RequestBody.create(MEDIA_TYPE, value);
                }
            };
        }
        return null;
    }
}

And after executing service.jquery();, signin will contain JSON response.