code: public void onClick(View targetView, BaseCell cell, int eventType) {
          if (cell instanceof Cell) {
              onClick(targetView, (Cell) cell, eventType);
          } else {
              onClick(targetView, cell, eventType, null);
          }
      }
docs: Handler click event on item
  
  @param targetView the view that trigger the click event, not the view respond the cell!
  @param cell       the corresponding cell
  @param eventType       click event type, defined by developer.