I have this spinner and want to know how I can put border around this
    Spinner dropdown = (Spinner)findViewById(R.id.spinnerUpdateContactMethod);
    String[] items = new String[]{"1", "2", "three"};
    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, items);
    dropdown.setPrompt("Please select ");
    dropdown.setAdapter(adapter);
the prompt doesn't actually come up on the screen. Please could someone help me with this.