how to set different color for labels

[ghost]

i wanna to change labels in different days but the application crash

mCalendarView.setDateLabelAdapter(new MonthView.DateLabelAdapter() {
@OverRide
public CharSequence getLabel(Calendar calendar, int index) {
if (calendar.get(Calendar.DATE) == 5) {
mCalendarView.getTimelineView().setLabelColor(getResources().getColor(R.color.red_50));

                return "busy";
            }else
                return Integer.toString(calendar.get(Calendar.MONTH) + 1) + "/" + 
                           (calendar.get(Calendar.YEAR) % 2000);
        }
    });
    mCalendarView.getTimelineView().getAdapter().notifyDataSetChanged();