PHP how to insert value to mysql table using android

how to after android connect php,insert value to sql table ?

I wanna use android post value to php

than php can receive value and insert to.

but now I have problem

I don't know why can't insert to.

this is my android code

public class MainActivity extends Activity {
    TextView t;
    //
    String url = "http://ift.tt/1OwdThR";

    //thread
    Handler mHandle; //manager
    HandlerThread mThread;//worker
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);     
        //create table using CreateTable.php
        mThread = new HandlerThread("CreateTable");//
        mThread.start();//worker stand by
        mHandle = new Handler (mThread.getLooper());//look for worker using Handle manager
        mHandle.post(CreateTable);//give work for worker
    }
    //
    private Runnable CreateTable = new Runnable() {
        @Override
        public void run() {

            // TODO Auto-generated method stub
            //connect php
            HttpClient httpclient = new DefaultHttpClient();
            HttpPost method = new HttpPost(url);
            //send value to 
            List< NameValuePair> vars=new ArrayList< NameValuePair>();
            vars.add(new BasicNameValuePair("number","abc"));
            try {
                method.setEntity(new UrlEncodedFormEntity(vars,HTTP.UTF_8));
                Log.e("TAG","Send to php");
            } catch (UnsupportedEncodingException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    };
}

and this is my php code

<?php   
 $dbhost = 'localhost';   
 $dbuser = 'root';   
 $dbpass = '';   
 $dbname = 'androidhive';   

$number = $_POST['number'];//$number from android

$conn = mysql_connect($dbhost, $dbuser, $dbpass) or die('Error with MySQL connection');

  mysql_query("SET NAMES 'utf8'");
  mysql_select_db($dbname);   
  $result = mysql_query("INSERT INTO table1(Username,Password,Role) VALUES('number', 'number', 'number')");
?>