public class SubjectTask extends AsyncTask<Void, Void, Integer> {

    @Override
    protected void onPreExecute() {
        progressDialog = ProgressDialog.show(Login.this, "Loading",
                "Please wait...");
        //checkConnection();

    }

    @Override
    protected Integer doInBackground(Void... arg0) {

        if (isOnline()) {  //using ConnectivityManager And Network Info

            try {

                //Http Request connections

            } catch (Exception e) {
                e.printStackTrace();
            }



            return 1;
        } else {

            alert("Check your internet connection");
            return 0;
        }

    }

    protected void onPostExecute(Integer result) {
        super.onPostExecute(result);
        if (progressDialog.isShowing()) {
            progressDialog.dismiss();
        }
    }

}