Retrofit.java

HttpLoggingInterceptor httpLoggingInterceptor = new HttpLoggingInterceptor();          
if (BuildConfig.DEBUG) {
  httpLoggingInterceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
} else {
  httpLoggingInterceptor.setLevel(HttpLoggingInterceptor.Level.NONE);
}

OkHttpClient okHttpClient = new OkHttpClient.Builder()
            .readTimeout(1000, TimeUnit.SECONDS)
            .addInterceptor(httpLoggingInterceptor)
            .build();

Retrofit retrofit = new Retrofit.Builder()
            .baseUrl(Config.BASE_URL)
            .addConverterFactory(GsonConverterFactory.create())
            .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
            .client(okHttpClient)
            .build();

CommonApiService commonApiService = retrofit.create(CommonApiService.class);