java - Monitoring BufferedInputStream download progress -

i'm trying download file using asynctask on android. want display progressdialog should have progress bar show status of download. i'm using onprogressupdate() function , implemented call publishprogress() in doinbackground() function. however, progress dialog pops after downloading file. code:

protected long doinbackground(url...urls) {     (int = 0; < urls.length; i++) {         url = urls[i];         try {             urlconnection conn = url.openconnection();             conn.connect();             totalsize = conn.getcontentlength();              bufferedinputstream bis = new bufferedinputstream(url.openstream());             fileoutputstream fos = new fileoutputstream(environment.getexternalstoragedirectory().getpath() + "/forvo_temp.mp3");             bufferedoutputstream bos = new bufferedoutputstream(fos,1024);             byte [] data = new byte[1024];              int x=0; int c=0;             while((x=bis.read(data,0,1024))>=0){                 bos.write(data,0,x);                 c += 1024;                 publishprogress(c);             }         } catch (exception e) {             e.printstacktrace();         }     }      return 0l; // don't know }  protected void onprogressupdate(integer...args) {     pd = progressdialog.show(context, "downloading...", "downloading...", true, false);     pd.setprogress(args[0] / totalsize); } 

i guess whole file downloaded when call new bufferedinputstream(url.openstream()). how can monitor download progress?

this code useful showing download items totol size , downloaded size.

private static final int download_onprogress = 1;  @override protected dialog oncreatedialog(int id) {     switch (id) {     case download_onprogress:         progressdialog = new progressdialog(this);          progressdialog.setmessage("downloading latest ...");         progressdialog.setcancelable(true);         progressdialog.setprogressstyle(progressdialog.style_horizontal);         try {             progressdialog.show();         } catch (exception e) {             // todo auto-generated catch block             e.printstacktrace();         }         return progressdialog;     default:         return null;     } } 

you can use asynctask downloading version in background.

private class download extends asynctask<string, string, string> {      @override     protected void onpreexecute() {         // todo auto-generated method stub         super.onpreexecute();         logger.info("loaddataasync onpreexecute");         showdialog(download_onprogress);     }      @override     protected string doinbackground(string... aurl) {         int count = 0;          try {             url url = new url(aurl[0]);             urlconnection urlconnection = url.openconnection();             urlconnection.connect();              int contentlength = urlconnection.getcontentlength();             progressdialog.setmax(contentlength);             string path = "";             file file = null;             if (android.os.environment.getexternalstoragestate().equals(                     android.os.environment.media_mounted)) {                 path = environment.getexternalstoragedirectory()                         + "/download/";                 file = new file(path);                  file.mkdirs();                  file outputfile = new file(file, "telfaz.apk");                 outputstream fos = new fileoutputstream(outputfile);                  inputstream = new bufferedinputstream(url.openstream());                  byte[] buffer = new byte[1024];                 long len1 = 0;                 while ((count = is.read(buffer)) != -1                         && !download.iscancelled()) {                     len1 += count;                     publishprogress("" + len1);                     fos.write(buffer, 0, count);                 }                 fos.flush();                 fos.close();                 is.close();              }             logger.info("success -> file downloaded succesfully. returning 'success' code");             return util.apk_download_success;          } catch (ioexception e) {             logger.error("exception in update process : "                     + util.getstacktrace(e));         }         logger.info("failed -> file download failed. returning 'error' code");         return util.apk_download_failed;     }      @override     protected void onpostexecute(string result) {         logger.info("on download onpostexecute. result : " + result);         progressdialog.dismiss();         removedialog(download_onprogress);         if (result.equalsignorecase(util.apk_download_success)) {             update();          } else {             toast.maketext(downloadallcontentsactivity.this,                     getstring(r.string.updateapplicationfailed),                     toast.length_long).show();              loaddataasync.execute();          }      }      @override     protected void onprogressupdate(string... values) {         if (values != null && values.length > 0) {             progressdialog.setprogress(integer.parseint(values[0]));         }      }   }