openrtb | OpenRTB model for Java and other languages via protobuf | Serialization library

package com.example.sample;

import android.annotation.SuppressLint;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;

import java.io.IOException;

import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;


public class MainActivity2 extends AppCompatActivity {

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        loadContent();
    }

    public static String GET(OkHttpClient client, String url) throws IOException {
        Request request = new Request.Builder()
                .url(url)
                .build();
        Response response = client.newCall(request).execute();
        return response.body().string();
    }

    @SuppressLint("StaticFieldLeak")
    private void loadContent() {
        new AsyncTask() {
            @Override
            protected String doInBackground(String... params) {
                OkHttpClient client = new OkHttpClient();
                String response = "";
                try {
                    response = GET(client, "http://sspapi-dev.samsungrs.com/health");
                    //Parse the response string here

                } catch (IOException e) {
                    e.printStackTrace();
                }
                return response;
            }

            @Override
            protected void onPostExecute(String s) {
                super.onPostExecute(s);
                Log.e("Response", s);
            }
        }.execute();
    }
}