Android : How to make RESTAPI calls in android using node.js

I have created a RESTAPI in Node.js and trying it to invoke into my android application. But i am not able to make the request to the Node.js Rest API.

My code are as follows:

Node.js

 var restify = require('restify');
 var request = require('request');
 var http    = require('http');
 var appContext = require('./config.js');

 function labsAPI(jsonparseStr) {
    return JSON.stringify(labsapi);
 }


 function searchbase(req, res, next){


    var options = {
        host: appContext.host,
        path: appContext.path+req.params.name+appContext.queryString
    };

   cbCallback = function(response) {
    var str = '';

    response.on('data', function (chunk) {
        str += chunk;
    });

    response.on('end', function () {
        jsonparseStr = JSON.parse(str);
        json_res = labsAPI(jsonparseStr);
        res.writeHead(200,{'Content-Type':'application/json'});
        res.end(json_res);
       });
   }
    http.request(options, cbCallback).end();
 }

  var server = restify.createServer({name:'crunchbase'});
  server.get('/search/:name',searchbase);

  server.listen(appContext.port, function() {
     console.log('%s listening at %s', server.name, server.url);
  });

After running my code like : localhost:8084/search/name

I am able to return the output to the browser a valid Json.

Now i want to consume this web service into my android application , I am not able to figure out how to do it. I tried some of the example http://hmkcode.com/android-parsing-json-data/

In the above blog in MainActivity.java i changed my url to

    new HttpAsyncTask().execute("http://127.0.0.1:8084/search/name");

but it is displaying nothing