public class RetrofitClient {

    private static Retrofit retrofit = null;
    private static Context context;

    public RetrofitClient(Context context) {
        this.context = context;
    }

        OkHttpClient.Builder builder = new OkHttpClient.Builder();
        OkHttpClient okHttpClient = null;
        okHttpClient = builder.addInterceptor(new AddCookiesInterceptor(context))
                .addInterceptor(new ReceivedCookiesInterceptor(context))
                .build();

        if (retrofit == null) {
            retrofit = new Retrofit.Builder()
                    .baseUrl(baseUrl)
                    .addConverterFactory(GsonConverterFactory.create())
                    .client(okHttpClient)
                    .build();
        }
        return retrofit;
    }
}