Image download with progress dialog

    public class MyAsync extends AsyncTask<String, Integer, Bitmap> {

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            dialog = new ProgressDialog(MainActivity.this);
            dialog.setTitle("Downloading...");
            dialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
            dialog.show();
            dialog.setMax(100);
        }

        @Override
        protected void onPostExecute(Bitmap bitmap) {
            imageView.setImageBitmap(bitmap);
            dialog.dismiss();
            super.onPostExecute(bitmap);
        }

        @Override
        protected void onProgressUpdate(Integer... values) {
            super.onProgressUpdate(values);
            dialog.setProgress(values[0]);
        }

        @Override
        protected Bitmap doInBackground(String... params) {
            try {
                URL url = new URL(params[0]);
                HttpURLConnection connection = (HttpURLConnection) url.openConnection();
                connection.setDoInput(true);
                connection.connect();
                InputStream input = connection.getInputStream();
                int total = connection.getContentLength();
                int downloaded = 0;
                int bytesCount;
                byte[] imageData = new byte[10000];
                File file = new File(getFilesDir().getPath() + "tempFile");
                if (!file.exists()) {
                    file.createNewFile();
                }
                FileOutputStream cacheFile = new FileOutputStream(file);
                while ((bytesCount = input.read(imageData)) > 0) {
                    downloaded += bytesCount;
                    publishProgress((downloaded * 100) / total);
                    cacheFile.write(imageData, 0, bytesCount);
                }
                cacheFile.close();
                Bitmap myBitmap = BitmapFactory.decodeFile(getFilesDir().getPath() + "tempFile");
                file.delete();
                return myBitmap;
            } catch (IOException e) {
                return null;
            }
        }
    }