@Override
 public void onClick(View view) {
   int id = view.getId();
   if (id == R.id.back_layout) {
     finish();
   } else if (id == R.id.calendar_left) {
     mCalendarAdapter.showPreviousMonth(this);
   } else if (id == R.id.calendar_right) {
     mCalendarAdapter.showNextMonth(this);
   } else {
   }
 }