ViewPager setOnPageChangeListener无法正常工作

Question

有人知道哪里有问题？我不能让页面更改监听器工作。我需要在页面更改但不能正常工作时获得实际位置。我找到了很多，但问题仍然存在。感谢时间。

公共类SuperFragmentHome扩展Fragment

@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);

    PagerCustomHorizontalScrollView tabs = (PagerCustomHorizontalScrollView) view.findViewById(R.id.pagerTabs);
    ViewPager pager = (ViewPager) view.findViewById(R.id.pager);
    MyPagerAdapter adapter = new MyPagerAdapter(getChildFragmentManager());
    pager.setAdapter(adapter);
    //pager.setCurrentItem(1);
    //pager.setOffscreenPageLimit(0);
    //pager.getViewTreeObserver().addOnGlobalLayoutListener(new HomeFragment());
    pager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
        @Override
        public void onPageScrolled(int i, float v, int i2) {

        }

        @Override
        public void onPageSelected(int i) {

        }

        @Override
        public void onPageScrollStateChanged(int i) {

        }
    });

    tabs.setViewPager(pager);
}

我在SuperFragmentHome类中也有适配器类

public class MyPagerAdapter extends FragmentPagerAdapter {

    DayCalculator dayCalc = new DayCalculator();
    String s1 = dayCalc.getNameOfDayOfWeek(-1) + " " + dayCalc.getDateOfDayOfWeek(-1);
    String s2 = dayCalc.getNameOfDayOfWeek(0) + " " + dayCalc.getDateOfDayOfWeek(0);
    String s3 = dayCalc.getNameOfDayOfWeek(1) + " " + dayCalc.getDateOfDayOfWeek(1);
    String s4 = dayCalc.getNameOfDayOfWeek(2) + " " + dayCalc.getDateOfDayOfWeek(2);
    String s5 = dayCalc.getNameOfDayOfWeek(3) + " " + dayCalc.getDateOfDayOfWeek(3);
    String s6 = dayCalc.getNameOfDayOfWeek(4) + " " + dayCalc.getDateOfDayOfWeek(4);

    public MyPagerAdapter(FragmentManager fm) {
        super(fm);
    }

    private final String[] TITLES = {s1, s2, s3, s4, s5, s6};

    @Override
    public CharSequence getPageTitle(int position) {
        return TITLES[position];
    }

    @Override
    public int getCount() {
        return TITLES.length;
    }

    @Override
    public Fragment getItem(int position) {
        return HomeFragment.newInstance(position);
    }
}