XmiSerializationDemo/app/src/main/java/com/example/xmlserializationdemo/RetrofitManager.java

package com.example.xmlserializationdemo;

import okhttp3.OkHttpClient;
import okhttp3.logging.HttpLoggingInterceptor;
import retrofit2.Retrofit;
import retrofit2.converter.simplexml.SimpleXmlConverterFactory;

public class RetrofitManager {
    private static RetrofitManager mInstance = new RetrofitManager();

    private MyApiService myApiService;

    private RetrofitManager() {
        // For debug
        HttpLoggingInterceptor logging = new HttpLoggingInterceptor();
        logging.setLevel(HttpLoggingInterceptor.Level.BODY);

        // Custom OkHttp Client
        OkHttpClient.Builder okHttpClient = new OkHttpClient.Builder();
        okHttpClient.addInterceptor(logging);

        Retrofit retrofit = new Retrofit.Builder()
                .baseUrl("https://data.ntpc.gov.tw/")  // API domain
                .client(okHttpClient.build())
                .addConverterFactory(SimpleXmlConverterFactory.create())
                .build();

        myApiService = retrofit.create(MyApiService.class);
    }

    public static RetrofitManager getInstance() {
        return mInstance;
    }

    public MyApiService getMyApiService() {
        return myApiService;
    }
}