class HighLightArrayAdapter extends ArrayAdapter<CharSequence> {

        private int mSelectedIndex = -1;


        public void setSelection(int position) {
            mSelectedIndex =  position;
            notifyDataSetChanged();
        }

        public HighLightArrayAdapter(Context context, int resource, CharSequence[] objects) {
            super(context, resource, objects);
        }


        @Override
        public View getDropDownView(int position, View convertView, ViewGroup parent) {
            View itemView =  super.getDropDownView(position, convertView, parent);

            if (position == mSelectedIndex) {
                itemView.setBackgroundColor(Color.rgb(56,184,226));
            } else {
                itemView.setBackgroundColor(Color.TRANSPARENT);
            }

            return itemView;
        }
    }