private void initField() { context = this; disLoa = (ProgressBar) findViewById(R.id.loading_discovery); disRes = (TextView) findViewById(R.id.result_discovery); gateway = (EditText) findViewById(R.id.gateway); loginUsername = (EditText) findViewById(R.id.login_username); loginPass = (EditText) findViewById(R.id.login_pass); MessageCenter.initInstance(); }