public void swipePrevious() {
   if (wizardPager.getCurrentItem() > 0) {
     int position = wizardPager.getCurrentItem() - 1;
     wizardPager.setCurrentItem(position);
     onPageSelected(position);
   }
 }
 public void swipeNext() {
   if (wizardPager.getCurrentItem() < adapter.getCount() - 1) {
     int position = wizardPager.getCurrentItem() + 1;
     wizardPager.setCurrentItem(position);
     onPageSelected(position);
   }
 }