Stopping a Thread when downloading

Question

Hi everyone!
I'm develop a app to connect to a FTP Server and dowload and upload files. When I click on Cancel button, the app will still running but the download will stop.
So, my problem is: How can I stop a Thread when i'm donwloading a file?
I'm using Commons Net 3.0.1 to connect from a FTP. I have tried logout(), disconnect(), abort()... Into Threads I have tried interrupt(), yield(), stop(), destroy()... But not works!
The "safe way to stop a Thread" don't work for me, becouse I'm not using a While but yes this line code to download the file:
ftp.retrieveFile(TARGET, SOURCE);
When I click on cancel button the donwload still running in background.
PS: Sorry for my english :)

Answer 1

Problem solved! Using the method retrieveFileStream() and the famous "the safe way to stop a Thread" I can stop it without need to close my app!
The code was (adapted):
OutputStream os;
InputStream is;
localDownload = new FileOutputStream(new File(LOCAL, NOME_ARQUIVO));
os = localDownload;
is = ftp.retrieveFileStream(LOCAL_FTP+NOME_ARQUIVO_FTP);
if(is != null){
     int bytesRead = -1;
     final byte[] buffer = new byte[4096];
     while ((bytesRead = is.read(buffer)) != -1){
          if(cancelado == false)
               os.write(buffer, 0, bytesRead);
          else
               cancelado = false;
is.close();
ftp.completePendingCommand();PS: The method completePendingCommand() is fundamental for the download can be stoped.
Again: sorry for my english :)
Edited by: 866587 on 17/06/2011 09:53