title: Implementation of volly library for calling webservcies in android
body: <p>I am using below code and Volley lib to call api.
  in this just passing method and url , I need to pass headers also.</p>
  
  <pre><code>JsonObjectRequest jsonObjReq = new JsonObjectRequest(Method.GET,
              "http//xyz", null, new Response.Listener&lt;JSONObject&gt;()
  </code></pre>