MyApi Volley request factory. Part of http://develop-for-android.blogspot.com.es/2014/01/using-volley-in-your-application_31.html

MyApi.java

package net.colaborativa.exampleapp;

import android.content.Context;

import com.android.volley.DefaultRetryPolicy;
import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response.ErrorListener;
import com.android.volley.Response.Listener;
import com.android.volley.toolbox.Volley;
import net.colaborativa.exampleapp.api.LoginRequest;
import net.colaborativa.exampleapp.api.LoginResponse;
import net.colaborativa.exampleapp.api.volley.GsonPRequest;

public class MyApi {
	private final RequestQueue mQueue;

	public static final String BASE_URL = 
			"http://127.0.0.1:8080/exampleapp";
	public static final String LOGIN_URL = 
			BASE_URL + "/login";
	
	private static final int POST_TIMEOUT = 
			60000; // 1 min, in miliseconds

	public MyApi(Context context) {
		mQueue = Volley.newRequestQueue(context);
	}

	public Request<?> newLoginRequest(
			String username, 
			String password, 
			Listener<LoginResponse> listener,
			ErrorListener errorListener) {
		// Handle the inputs to the server, in this case,
		// is creating the input DAO object with user/pwd
		LoginRequest payload = 
				new LoginRequest(username, password);

		//
		// Call the request adapter.
		//
		// This adapter GsonPRequest was created to POST/PUT 
		// a JSON body and accept a JSON response. It will 
		// accept any class as request/response DAOs, and will
		// "talk" JSON with them using the Gson library.
		//
		// The request payload is a DAO (LoginRequest) with
		// username and password.
		// 
		// The response is expected to be a DAO (LoginResponse)
		// containing the session token.
		//
		GsonPRequest<LoginRequest, LoginResponse> req = 
				new GsonPRequest<LoginRequest, LoginResponse>(
				  LOGIN_URL, 
				  LoginRequest.class, 
				  payload, 
				  LoginResponse.class, 
				  listener, 
				  errorListener
				  );

		// set retry policy
		req.setRetryPolicy(new DefaultRetryPolicy(
				POST_TIMEOUT,
				3, 
				DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));

		// add the request to the queue and return it
		return mQueue.add(req);
	}

}