Url to connect android to mysql database-Collection of common programming errors

I am trying to retrieve data from localhost database created using xampp mysql.

public class JASONUseActivity extends Activity {

 EditText byear;   // To take birthyear as input from user
 Button submit;    
 TextView tv;      // TextView to show the result of MySQL query 

 String returnString;   // to store the result of MySQL query after decoding JSON

    /** Called when the activity is first created. */
@Override
protected void onCreate(Bundle savedInstanceState) {
    StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()
      .detectDiskReads().detectDiskWrites().detectNetwork() // StrictMode is most commonly used to catch accidental disk or network access on the application's main thread
      .penaltyLog().build());
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    byear = (EditText) findViewById(R.id.editText1);
    submit = (Button) findViewById(R.id.submitbutton);
    tv = (TextView) findViewById(R.id.showresult);

    // define the action when user clicks on submit button
    submit.setOnClickListener(new View.OnClickListener(){        
     public void onClick(View v) {

         // declare parameters that are passed to PHP script i.e. the name birth year and its value submitted by user   
      ArrayList postParameters = new ArrayList();

      // define the parameter
      postParameters.add(new BasicNameValuePair("birthyear",byear.getText().toString()));
      String response = null;

      // call executeHttpPost method passing necessary parameters 
      try {
 response = CustomHttpClient.executeHttpPost("http://localhost/jasonscript.php",postParameters);

 // store the result returned by PHP script that runs MySQL query
 String result = response.toString();  

I am not able to view data in textview. Is the url correct??

Here is the jasonscript.php located in xampp/htdocs