Use proxy with Volley

ProxiedHurlStack.java

import com.android.volley.toolbox.HurlStack;

import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.InetSocketAddress;
import java.net.Proxy;
import java.net.URL;

/**
 * @author hendrawd on 6/29/16
 */
public class ProxiedHurlStack extends HurlStack {
    
    private static final String PROXY_ADDRESS = "some proxy address";
    private static final int PROXY_PORT = 80;//change with the port of the proxy
    
    @Override
    protected HttpURLConnection createConnection(URL url) throws IOException {
        Proxy proxy = new Proxy(Proxy.Type.HTTP,
                InetSocketAddress.createUnresolved(PROXY_ADDRESS, PROXY_PORT));
        return (HttpURLConnection) url.openConnection(proxy);
    }
}

Test.java

import android.content.Context;
import android.util.Log;

import com.android.volley.Request;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import com.ionsoft.fotato.network.VolleySingleton;

import org.json.JSONException;
import org.json.JSONObject;

/**
 * @author hendrawd on 6/29/16
 */
public class Test {

    private static final String URL = "https://api.ipify.org/?format=json";

    public void showIpAddress(Context context) {
        StringRequest stringRequest = new StringRequest(Request.Method.GET,
                URL,
                new Response.Listener<String>() {
                    @Override
                    public void onResponse(String response) {
                        try {
                            JSONObject jsonObject = new JSONObject(response);
                            Log.v(this.getClass().getSimpleName(), "My IP Address is = " + jsonObject.getString("ip"));
                        } catch (JSONException e) {
                            Log.v(this.getClass().getSimpleName(), "JSON Exception = " + e.getMessage());
                            e.printStackTrace();
                        }
                    }
                },
                new Response.ErrorListener() {
                    @Override
                    public void onErrorResponse(VolleyError error) {
                        Log.v(this.getClass().getSimpleName(), "Volley error when get IP Address = " + error.getMessage());
                    }
                });
        VolleySingleton.getInstance(context).addToRequestQueue(stringRequest);
    }
}

VolleySingleton.java

import android.content.Context;

import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.toolbox.Volley;

public class VolleySingleton {
    private static VolleySingleton mInstance = null;
    private RequestQueue mRequestQueue;
    private static final String TAG = VolleySingleton.class.getSimpleName();

    private VolleySingleton(Context context) {
        mRequestQueue = Volley.newRequestQueue(context, new ProxiedHurlStack());
    }

    public static synchronized VolleySingleton getInstance(Context context) {
        if (mInstance == null) {
            mInstance = new VolleySingleton(context);
        }
        return mInstance;
    }

    private RequestQueue getRequestQueue() {
        return this.mRequestQueue;
    }

    public <T> void addToRequestQueue(Request<T> req, Object tag) {
        req.setTag(tag == null ? TAG : tag);
        getRequestQueue().add(req);
    }

    public <T> void addToRequestQueue(Request<T> req) {
        req.setTag(TAG);
        getRequestQueue().add(req);
    }

    public void cancelPendingRequests(Object tag) {
        if (mRequestQueue != null) {
            mRequestQueue.cancelAll(tag);
        }
    }

    public void cancelPendingRequestsNoTag() {
        if (mRequestQueue != null) {
            mRequestQueue.cancelAll(TAG);
        }
    }

    public void clearVolleyCache() {
        if (mRequestQueue != null) {
            mRequestQueue.getCache().clear();
        }
    }
}