@Override public void onClick(DialogInterface dialog, int which) { switch (which) { case R.id.bt_1: // if (spUsername.getSelectedItem() == null) { // break; // } String pwd = etPassword.getText().toString(); String user = spUsername.getText().toString(); LoginTask task = makeLoginTask(user, pwd); task.execute(); break; case R.id.bt_2: cancel(); break; } }