@Override
        public void handleMessage(Message msg) {
          AsyncResult ar;

          switch (msg.what) {
            case EVENT_SET_SUBSCRIPTION_DONE:
              Log.d(LOG_TAG, "EVENT_SET_SUBSCRIPTION_DONE");
              mEnablerPreference.handleSetSubDone();
              mSubscriptionManager.unRegisterForSetSubscriptionCompleted(mHandler);
              try {
                dismissDialog(DIALOG_SET_SUBSCRIPTION_IN_PROGRESS);
              } catch (Exception e) {
                e.printStackTrace();
              }
              getPreferenceScreen().setEnabled(true);
              ar = (AsyncResult) msg.obj;
              String result[] = (String[]) ar.result;
              if (result != null) {
                displayAlertDialog(resultToMsg(result[CARD1]));
                setScreenState();
              } else {
                finish();
              }

              break;
            case EVENT_ENABLE_GSM_STEP1_DONE:
              try {
                dismissDialog(DIALOG_DISABLE_CARD2_GSM_IN_PROGRESS);
              } catch (Exception e) {
                e.printStackTrace();
              }
              mSubscriptionManager.unRegisterForSetSubscriptionCompleted(mHandler);
              switchToGSMStep2();
              break;
            case EVENT_SIM_STATE_CHANGED:
              Log.d(LOG_TAG, "EVENT_SIM_STATE_CHANGED");
              break;
          }
        }
    protected Boolean doInBackground(ArrayList... params) {
      download_photos.this.runOnUiThread(
          new Runnable() {
            public void run() {
              mtext.setText(
                  getText(R.string.download_textview_message_1) + " " + path.toString() + ". ");
            }
          });

      if (resume_file.exists()) {
        initial_value = readProgress()[0];
      } else {
        initial_value = 1;
      }

      for (int i = initial_value - 1; i < links.size(); i++) {
        // asynctask expects more than one ArrayList<String> item, but we are sending only one,
        // which is params[0]
        Uri imageuri = Uri.parse(params[0].get(i).toString());
        URL imageurl = null;
        HttpURLConnection connection = null;
        total_files_to_download = links.size();
        completed_downloads = i + 1;
        try {
          imageurl = new URL(params[0].get(i).toString());
          connection = (HttpURLConnection) imageurl.openConnection();
          connection.connect();
        } catch (Exception e) {
          // TODO Auto-generated catch block
          e.printStackTrace();
        }

        // extracts the real file name of the photo from url
        path_segments = imageuri.getPathSegments();
        int total_segments = path_segments.size();
        file_name = path_segments.get(total_segments - 1);

        path.mkdirs();

        // if(i==0)
        //	first_image = path.toString() + "/" + file_name;

        InputStream input;
        OutputStream output;
        try {
          input = new BufferedInputStream(imageurl.openStream());
          fully_qualified_file_name = new File(path, file_name);
          output = new BufferedOutputStream(new FileOutputStream(fully_qualified_file_name));
          byte data[] = new byte[1024];
          int count;
          while ((count = input.read(data)) != -1) {
            output.write(data, 0, count);
          }
          output.flush();
          output.close();
          input.close();
          connection.disconnect();

          new folder_scanner(getApplicationContext(), fully_qualified_file_name);

          publishProgress(completed_downloads, total_files_to_download);
          if (this.isCancelled()) {
            writeProgress(completed_downloads, total_files_to_download);
            break;
          }

        } catch (IOException e) {
          // TODO Auto-generated catch block
          e.printStackTrace();
        }

        // creates required folders and subfolders if they do not exist already
        // boolean success = path.mkdirs();

        // makes request to download photos
        // DownloadManager.Request request = new DownloadManager.Request(imageuri);

        // set path for downloads
        // request.setDestinationInExternalPublicDir(Environment.DIRECTORY_PICTURES,sub_path);

        // request.setDescription("Downloaded using Facebook Album Downloader");

        // DownloadManager dm = (DownloadManager)getSystemService(DOWNLOAD_SERVICE);

        // download is enqueue in download list. it returns unique id for each download
        // download_id = dm.enqueue(request);

      }
      // returns the unique id. we are not using this id
      return true;
    }