Hello.I want to make an application for get web data every x secs i try 
this code but no work...where is the mistake?Thanks.

 public class ReadWebpageAsyncTask extends Activity {
 private TextView textView;

 private final Handler handler = new Handler();

 @Override
 public void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_read_webpage_async_task);
 textView = (TextView) findViewById(R.id.textView1);
 }

private class DownloadWebPageTask extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... urls) {
  String response = "";

     .................
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
  return response;
 }

@Override
protected void onPostExecute(String result) {
  textView.setText(result);
}
}

 public void readWebpage(View view) {

  DownloadWebPageTask task = new DownloadWebPageTask();
  task.execute(new String[] { "http://www.mysite.net/LEDstate.txt"; });

 }

 private final Runnable refreshRunnable = new Runnable() {
  public void run() {

     DownloadWebPageTask task = new DownloadWebPageTask();
     task.execute(new String[] { "http://www.mysite.net/LEDstate.txt"; });
     //new RefreshTask(param1, param2).execute();
     long TIME_DELAY= 3000;
    handler.postDelayed(refreshRunnable, TIME_DELAY);
 }
};
 

 In main activity i have one text and two buttons the first button on click 
call readwebpage and work and the second button call refreshRunable and no 
work...

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