code: protected void setUpAdapter() {
          if (mAdapter == null) {
              mAdapter = new SimpleMonthAdapter(getContext(), mController);
          } else {
              mAdapter.setSelectedDay(mSelectedDay);
              mAdapter.notifyDataSetChanged();
          }
          // refresh the view with the new parameters
          mAdapter.notifyDataSetChanged();
      }
docs: Creates a new adapter if necessary and sets up its parameters. Override
  this method to provide a custom adapter.