Change font size in spinner

spinner1.java

public class Spinner1 extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.spinner_1);

        Spinner s1 = (Spinner) findViewById(R.id.spinner1);
		CharSequence[] strings = this.getResources().getTextArray(R.array.colors);
        CustomAdapter<CharSequence> adapter = new CustomAdapter<CharSequence>(this, android.R.layout.simple_spinner_item, strings);
     
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        s1.setAdapter(adapter);
    }
    
    class CustomAdapter<T> extends ArrayAdapter<T> {
		public CustomAdapter(Context context, int textViewResourceId,
				T[] objects) {
			super(context, textViewResourceId, objects);
		}

		@Override
		public View getView(int position, View convertView, ViewGroup parent) {
			View view = super.getView(position, convertView, parent);
			if (view instanceof TextView) {
				((TextView) view).setTextSize(5);
			}
			return view;
		}
    }
}