@Override // on click, it reads data from text box, if empty, shows invalid notification, // first interface, we get an edit text view to enter a username // next, the button is to be pressed // once the button is pressed, it inputs the username // if the username length is less than 1, invalid username notification appears public void onClick(View v) { switch (v.getId()) { case R.id.buttonStart: Log.i("wifiMessenger", "Start button pressed"); String username = editTextUsername.getText().toString(); if (username.trim().length() < 1) { Toast.makeText(getApplicationContext(), "Invalid Username", Toast.LENGTH_SHORT).show(); } else { AppGlobals.putName(username); notVirgin(); } break; } }