protected void onPostExecute(String results) {
    if (results != null) {
        Gson gson = new Gson();
        User user = gson.fromJson(results, User.class);

        TextView id = (TextView) findViewById(R.id.ID);
        id.setText(Integer.toString(user.getId()));

        TextView name = (TextView) findViewById(R.id.name);
        name.setText(user.getName());

        TextView email = (TextView) findViewById(R.id.email);
        email.setText(user.getEmail());
        ..........

        TextView textView1 = (TextView) findViewById(R.id.textView1);
        textView1.setText(results);
}