Download Progress in Android

I was trying to integrate the progress with download in android finally I got it.

public class DownloadExampleActivity extends Activity {
public static final int DIALOG_DOWNLOAD_PROGRESS = 0;
private Button startBtn;
private ProgressDialog mProgressDialog;
@Override
public void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.main);
 startBtn = (Button) findViewById(R.id.startBtn);
 startBtn.setOnClickListener(new OnClickListener() {
  public void onClick(View v) {
   startDownload();
  }
 });
}

private void startDownload() {
 String url = "http://www.kleenspeed.com/blog/wp-content/uploads/2011/10/DSCN1590.jpg";
 new DownloadFileAsync().execute(url);
}

@Override
protected Dialog onCreateDialog(int id) {
 switch (id) {
 case DIALOG_DOWNLOAD_PROGRESS:
  mProgressDialog = new ProgressDialog(this);
  mProgressDialog.setMessage("Downloading file..");
  mProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
  mProgressDialog.setCancelable(false);
  mProgressDialog.show();
  return mProgressDialog;
 default:
  return null;
 }
}

class DownloadFileAsync extends AsyncTask {

 @Override
 protected void onPreExecute() {
  super.onPreExecute();
  showDialog(DIALOG_DOWNLOAD_PROGRESS);
 }

 @Override
 protected String doInBackground(String... aurl) {
  int count;

  try {

   URL url = new URL(aurl[0]);
   URLConnection conexion = url.openConnection();
   conexion.connect();

   int lenghtOfFile = conexion.getContentLength();
   Log.d("ANDRO_ASYNC", "Lenght of file: " + lenghtOfFile);

   InputStream input = new BufferedInputStream(url.openStream());
   byte data[] = new byte[1024];
   long total = 0;
   while ((count = input.read(data)) != -1) {
    total += count;
    publishProgress("" + (int) ((total * 100) / lenghtOfFile));
   }
  } catch (Exception e) {
   Toast.makeText(DownloadExampleActivity.this, e.getMessage(),
     Toast.LENGTH_SHORT).show();
  }
  return null;

 }

 protected void onProgressUpdate(String... progress) {
  Log.d("ANDRO_ASYNC", progress[0]);
  mProgressDialog.setProgress(Integer.parseInt(progress[0]));
 }

 @Override
 protected void onPostExecute(String unused) {
  dismissDialog(DIALOG_DOWNLOAD_PROGRESS);
 }
}
}