public static Calllog_Frag newInstance(int sectionNumber) {
   Calllog_Frag fragment = new Calllog_Frag();
   Bundle args = new Bundle();
   args.putInt(ARG_SECTION_NUMBER, sectionNumber);
   fragment.setArguments(args);
   return fragment;
 }
    @Override
    public Fragment getItem(int position) {
      switch (position) {
        case 0:
          return StaggeredGridFragment.newInstance(position + 1);

        case 1:
          return Contact_Frag.newInstance(position + 1);

        case 2:
          return Message_Frag.newInstance(position + 1);

        case 3:
          //            return Contact_Frag.newInstance(position + 1);
          return Calllog_Frag.newInstance(position + 1);
      }
      return null;
    }