How to stop ui background thread on blackberry - blackberry

Question

I've addded 5 button in horizontalFieldManger.
When i click the button i gets image url from server there after i get the image.
I loaded the image in on verticalfiedlManager on the same screen..
My code is.
Thread loadImageThread = new Thread()
{
public void run()
{
if(Imagethread)
{
try
{
final Vector url = new Vector();
HttpConnections httpConnection = new HttpConnections(path+suffix);
DataInputStream _inputStream = new DataInputStream(httpConnection.StreamConnection());
getXMLObjects(_inputStream);
_inputStream.close();
UiApplication.getUiApplication().invokeLater(new Runnable()
{
public void run()
{
feedListItem = ListFeedHandler.item;
int Size = feedListItem.size();
for (int i = 0; i < Size; i++)
{
url.addElement(newsBean.getURL());
}
}
});
UiApplication.getUiApplication().invokeLater(new Runnable()
{
public void run()
{
loadPicture(url);
}
});
}
catch(Exception e)
{
e.printStackTrace();
}
}
}
};
loadImageThread.start();
In loadPicture(url) method. i get image and load on verticalfiledmager.
When i click second button, i delete all imaged on verticafiledmanager and reload which is get from second button.
Its working fine.
but my problem is when i click buttons two,three, four continuously , its load one by one. I need only the images which is last pressed button.

Answer 1

Something like this..
int id = -1;
...
if(id != -1) {
UiApplication.getUiApplication().cancelInvokeLater(id);
id = -1;
}
id = UiApplication.getUiApplication().invokeLater(new Runnable()
{
public void run() {
.....
id = -1; //when invokeLater task finished normally
}