@Override
    public Fragment getItem(int position) {
      Fragment fragment = new HowItWorksFragment();
      Bundle args = new Bundle();
      args.putInt(HowItWorksFragment.ARG_LAYOUT_ID, HOWITWORKS_PAGER_LAYOUT_ID_LIST[position]);
      fragment.setArguments(args);
      return fragment;
    }
This pager contains the pages for the layouts being showed on the "How it works" view.
java/com/google/android/apps/authenticator/howitworks/HowItWorksActivity.java