/////// $$$$$$$$$$$ SYNTAX
//...

new AsyncTask<Void, Void, String>() {
	@Override
	protected void onPreExecute() {
		//...
	}

	@Override
	protected String doInBackground(Void... voids) {
		return performBlockingTask();
	}

	@Override
	protected void onProgressUpdate(Integer... progress) {
		mProgessBar.setProgress(progress);
	}

	@Override
	protected void onPostExecute(String result) {
		mTextView.setText(result);
	}

}.execute();

//...

// WORKING EXAMPLE

new AsyncTask<URL, Integer, Long>() {
     protected Long doInBackground(URL... urls) {
         int count = urls.length;
         long totalSize = 0;
         for (int i = 0; i < count; i++) {
             totalSize += Downloader.downloadFile(urls[i]);
             publishProgress((int) ((i / (float) count) * 100));
             // Escape early if cancel() is called
             if (isCancelled()) break;
         }
         return totalSize;
     }

     protected void onProgressUpdate(Integer... progress) {
         setProgressPercent(progress[0]);
     }

     protected void onPostExecute(Long result) {
         showDialog("Downloaded " + result + " bytes");
     }
 }.execute(url1, url2, url3);
// Modified Code from google Android API