How to stop progressbar in blackberry - blackberry

Question

In BlackBerry, my application is working perfectly fine. But one Requirement is when I load data from server, a progress bar is showing. If it takes so much time to load data from server, then I want to stop the progress bar. In BlackBerry, on back key pressed, it is not working. Please help me.
public class WaitScreen extends PopupScreen
{
public WaitScreen(String msg) {
super(new HorizontalFieldManager());
add(new LabelField(msg));
AnimatedGIFField testanimated = new AnimatedGIFField(
(GIFEncodedImage) (GIFEncodedImage.getEncodedImageResource("ajax_loader.gif")),
AnimatedGIFField.FIELD_HCENTER | AnimatedGIFField.FIELD_VCENTER);
add(testanimated);
}
}

Answer 1

public long timeout=0;
t.schedule(new TimerTask() {
public void run()
{
// TODO Auto-generated method stub
timeout+=1;
System.out.println("Timeout value:"+timeout);
if(timeout>=28)
{
//timeout every 1 munite
System.out.println("Timeout value:"+timeout);
System.out.println("closing connection");
try
{
parent.notifyDestroyed();
}
catch (Exception ex)
{
System.out.println("Exception is:"+ex);
}
this.cancel();
}
}
}, 0, 1000);
// Thread.sleep(30000);
httpconn_post = (HttpConnection) Connector.open(url);
httpconn_post.setRequestMethod(HttpConnection.POST);
httpconn_post.setRequestProperty("Accept_Language","en-US");
httpconn_post.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
OutputStream out = httpconn_post.openOutputStream();
out.write(param.getBytes());
out.flush();
System.out.println("Status Line Code: " + httpconn_post.getResponseCode());
System.out.println("Status Line Message: " + httpconn_post.getResponseMessage());
if ( httpconn_post.getResponseCode()== HttpConnection.HTTP_OK )
{
is=httpconn_post.openDataInputStream();
// cancelling timer
t.cancel();
.....
.....
}
I had done this using this code..I had done it successfully..