Use android.R.layout.simple_spinner_item. I use this class java:
   final Spinner s = (Spinner) findViewById(R.id.spinner1);
      ArrayAdapter adapter = ArrayAdapter.createFromResource(
      this, R.array.seleziona, android.R.layout.simple_spinner_item);
      adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
            s.setAdapter(
                      new NothingSelectedSpinnerAdapter(
                            adapter,
                            R.drawable.contact_spinner_row_nothing_selected,
                            //                  R.layout.contact_spinner_nothing_selected_dropdown, // Optional
                            this));
            s.setPrompt("Seleziona");
    s.setOnItemSelectedListener(new OnItemSelectedListener() {
    public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
        String voceSelezionata = (String) s.getSelectedItem();
    }
    public void onNothingSelected(AdapterView<?> arg0) {
    }
    });
}
By default, the color is blue. How change only color in red?`