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POHow to implement multiple downloads with progress bar updation??
 

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  1. POHow to implement multiple downloads with progress bar updation??
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    <p>Description: I have a grid view with 4 items in landscape mode and 3 items on portrait mode. The grid element is a magazine thumbnail. On click of a thumbnail downloading of the magazine starts and a horizontal progress bar appears showing progress of download. But when i click to two thumbnails one after another , the progress bar of later clicked thumbnail only updates and at last corrupted magazine gets downloaded. I have used asynchronous task for magazine download.</p> <p>Code:</p> <pre><code>public void onItemClick(AdapterView&lt;?&gt; arg0, View arg1, int arg2, long arg3) { progress = (ProgressBar) arg1.findViewById(R.id.progress); thumbnail = (ImageView) arg1.findViewById(R.id.thumbnail); thumbnail.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // Download Magazine downloadMagazine.execute(bank.get(index).getPdfLink()); } }); } class DownloadMagazineTask extends AsyncTask&lt;String, Integer, Long&gt; { File sdDir = Environment.getExternalStorageDirectory(); @Override protected void onPreExecute() { progress.setVisibility(View.VISIBLE); } @Override protected Long doInBackground(String... arg0) { String[] urls = arg0; try { URL url = new URL(urls[0]); URLConnection con = url.openConnection(); int fileLength = con.getContentLength(); InputStream input = new BufferedInputStream(url.openStream()); File file = null; File dir = new File(sdDir + "/BeSpoken/pdfs"); boolean flag = dir.mkdirs(); if (flag) System.out.println("Directory created"); else { System.out.println("Directory not created"); file = new File(dir+ "/"+ bank.get(index).getPdfLink().substring(bank.get(index).getPdfLink().lastIndexOf("/"))); } OutputStream output = new FileOutputStream(file); byte data[] = new byte[1024]; long total = 0; int count; while ((count = input.read(data)) != -1) { total += count; // publishing the progress.... publishProgress((int) (total * 100 / fileLength)); output.write(data, 0, count); } String m = bank.get(index).getTitle(); manager.updateDownloadedMagazines( Integer.parseInt(m.substring(m.lastIndexOf(" ") + 1)), file.toString()); output.flush(); output.close(); input.close(); } catch (Exception e) { e.printStackTrace(); } startActivity(getIntent()); finish(); return null; } @Override protected void onProgressUpdate(Integer... values) { super.onProgressUpdate(values); progress.setProgress(values[0]); } @Override protected void onPostExecute(Long result) { super.onPostExecute(result); progress.setVisibility(View.INVISIBLE); } } </code></pre> <p>Question: How can i implement multiple download functionality so that progress bar shows progress of each download individually??</p>
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