Converter factory for Retrofit 2 which is convert response to primitive type class such as Integer, Float, Double, Boolean, etc. For now there are only String, Integer, Double, and Boolean converter. You can expand it by yourself easily.

PrimitiveConverterFactory.java

import java.io.IOException;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;

import okhttp3.ResponseBody;
import retrofit2.Converter;
import retrofit2.Retrofit;

/**
 * Created by bradhawk on 1/29/2016.
 */
public class PrimitiveConverterFactory extends Converter.Factory {

    public static PrimitiveConverterFactory create() {
        return new PrimitiveConverterFactory();
    }

    private PrimitiveConverterFactory() {
    }

    @Override
    public Converter<ResponseBody, ?> responseBodyConverter(Type type, Annotation[] annotations, Retrofit retrofit) {
        if (type == String.class) {
            return new Converter<ResponseBody, String>() {
                @Override
                public String convert(ResponseBody value) throws IOException {
                    return value.string();
                }
            };
        } else if(type == Integer.class) {
            return new Converter<ResponseBody, Integer>() {
                @Override
                public Integer convert(ResponseBody value) throws IOException {
                    return Integer.valueOf(value.string());
                }
            };
        } else if(type == Double.class) {
            return new Converter<ResponseBody, Double>() {
                @Override
                public Double convert(ResponseBody value) throws IOException {
                    return Double.valueOf(value.string());
                }
            };
        } else if(type == Boolean.class) {
            return new Converter<ResponseBody, Boolean>() {
                @Override
                public Boolean convert(ResponseBody value) throws IOException {
                    return Boolean.valueOf(value.string());
                }
            };
        }
        return null;
    }
}

Hello how it used
?
plz give one example when i used error accure

Thanks @fathonyfath

sample please