Set progressbar to KB and MB instead of % for android download manager

I'm trying to download an image from url and I need to display the size of the file and the progress of the file downloading.

This is what I have.

 int bytes_downloaded = cursor.getInt(cursor
                        .getColumnIndex(DownloadManager.COLUMN_BYTES_DOWNLOADED_SO_FAR));
                int bytes_total = cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_TOTAL_SIZE_BYTES));

 final int dl_progress = (int) ((bytes_downloaded * 100l) / bytes_total);
                runOnUiThread(new Runnable() {

                    @Override
                    public void run() {
                        getFileSize(fileSizeInKB);
                        mProgressDialog.setProgress((int) dl_progress);

                    }
  });

As of now its showing %(ie..10/100)

If I set it to mProgressDialog.setProgressNumberFormat("%1d kb / %2d kB") its showing as 1kb of 100kb but unable to get the actual size of the file which I'm trying to download

I need it display as 1.2MB/3.6MB

Issue is the progress is displaying as seen below 60/100 but I don't want that