code: public void setHomeAsUpIndicator(Drawable indicator) {
          if(!deviceSupportMultiPane()) {
              pulsante.setHomeAsUpIndicator(indicator);
          }
          else {
              actionBar.setHomeAsUpIndicator(indicator);
          }
      }
docs: Set the HomeAsUpIndicator that is visible when user navigate to a fragment child
  @param indicator the resource drawable to use as indicator