Ideal way to cancel an executing AsyncTask

Question

I am running remote audio-file-fetching and audio file playback operations in a background thread using AsyncTask. A Cancellable progress bar is sh

Answer 1

This is how I write my AsyncTask
the key point is add Thread.sleep(1);

@Override   protected Integer doInBackground(String... params) {

        Log.d(TAG, PRE + "url:" + params[0]);
        Log.d(TAG, PRE + "file name:" + params[1]);
        downloadPath = params[1];

        int returnCode = SUCCESS;
        FileOutputStream fos = null;
        try {
            URL url = new URL(params[0]);
            File file = new File(params[1]);
            fos = new FileOutputStream(file);

            long startTime = System.currentTimeMillis();
            URLConnection ucon = url.openConnection();
            InputStream is = ucon.getInputStream();
            BufferedInputStream bis = new BufferedInputStream(is);

            byte[] data = new byte[10240]; 
            int nFinishSize = 0;
            while( bis.read(data, 0, 10240) != -1){
                fos.write(data, 0, 10240);
                nFinishSize += 10240;
                **Thread.sleep( 1 ); // this make cancel method work**
                this.publishProgress(nFinishSize);
            }              
            data = null;    
            Log.d(TAG, "download ready in"
                  + ((System.currentTimeMillis() - startTime) / 1000)
                  + " sec");

        } catch (IOException e) {
                Log.d(TAG, PRE + "Error: " + e);
                returnCode = FAIL;
        } catch (Exception e){
                 e.printStackTrace();           
        } finally{
            try {
                if(fos != null)
                    fos.close();
            } catch (IOException e) {
                Log.d(TAG, PRE + "Error: " + e);
                e.printStackTrace();
            }
        }

        return returnCode;
    }