public static PlaceholderFragment newInstance(int sectionNumber) {
   PlaceholderFragment fragment = new PlaceholderFragment();
   Bundle args = new Bundle();
   args.putInt(ARG_SECTION_NUMBER, sectionNumber);
   fragment.setArguments(args);
   return fragment;
 }
 /** Returns a new instance of this fragment for the given section number. */
 public static PlaceholderFragment newInstance(int sectionNumber) {
   PlaceholderFragment fragment = new PlaceholderFragment();
   Bundle args = new Bundle();
   args.putInt(ARG_SECTION_NUMBER, sectionNumber);
   int id;
   switch (sectionNumber) {
     case 1:
       id = R.drawable.coke_zero_751ml;
       break;
     case 2:
       id = R.drawable.coke_zero_can;
       break;
     default:
       id = R.drawable.coke_zero_2l;
       break;
   }
   args.putInt(ARG_BACKGROUND_ID, id);
   fragment.setArguments(args);
   return fragment;
 }