can't make GET request to solr in android app

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Hello all.

I'm trying to make a small search engine based on android. when I'm calling
solr by this 
"http://localhost:8983/solr/collection1/select?q="+loginValue+"&wt=json&indent=true";;
(loginValue is the keywork im looking for)

Its always giving me a fail message this is the code:

 try{ 

            // URLEncode user defined data

              String loginValue    =
URLEncoder.encode(etxt1.getText().toString(), "UTF-8");
       
          // Create http client object to send request to server

              HttpClient Client = new DefaultHttpClient();
              
              
           String URL =
"http://localhost:8983/solr/collection1/select?q="+loginValue+"&wt=json&indent=true";;
          

          try
           {
                         String SetServerString = "";
               
                       // Create Request to server and get response
                        HttpGet httpget = new HttpGet(URL);
                        ResponseHandler<String> responseHandler = new
BasicResponseHandler();
                        SetServerString = Client.execute(httpget,
responseHandler);
              
                         // Show response on activity 

                        etxt2.setText(SetServerString);
                  
        
                   
            }}
          catch(Exception ex)
             {
                  etxt2.setText("Fail!");
              }
       }
     catch(UnsupportedEncodingException ex)
      {
         etxt2.setText("Fail11111");
       }     
   }





any suggestion 



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