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I have a bottomnavigation in the main activity that has 5 tabs in each file There are 5 tabs in each of the Fragment Everything works fine But when it comes to other Fragment bottomnavigation, viewpager is not updated

class ViewPagerAdapter extends FragmentPagerAdapter {
    private final List<Fragment> mFragmentList = new ArrayList<>();
    private final List<String> mFragmentTitleList = new ArrayList<>();

    public ViewPagerAdapter(FragmentManager manager) {
        super(manager);
    }

    @Override
    public Fragment getItem(int position) {
        return mFragmentList.get(position);
    }

    @Override
    public int getCount() {
        return mFragmentList.size();
    }

    @Override
    public int getItemPosition(Object object){
        return PagerAdapter.POSITION_NONE;
    }

    public void addFragment(Fragment fragment, String title) {
        mFragmentList.add(fragment);
        mFragmentTitleList.add(title);
    }

    @Override
    public CharSequence getPageTitle(int position) {
        return mFragmentTitleList.get(position);
    }

}



private void setupViewPager(ViewPager viewPager) {
    FrgPlayer.ViewPagerAdapter adapter = new FrgPlayer.ViewPagerAdapter(getFragmentManager());

    adapter.addFragment(new FrgJadval(), "a");
    adapter.addFragment(new FrgKholase(), "b");
    adapter.addFragment(new FrgAmar(), "c");
    adapter.addFragment(new FrgRokhdad(), "d");
    viewPager.setAdapter(adapter);

}

I do not know why the cause of the non-updating of ViewPager

Phantômaxx
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aaaaaa
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  • Possible duplicate of [ViewPager PagerAdapter not updating the View](https://stackoverflow.com/questions/7263291/viewpager-pageradapter-not-updating-the-view) – Dima Kozhevin Oct 04 '17 at 14:37

1 Answers1

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Try calling notifyDataSetChanged():

    public void addFragment(Fragment fragment, String title) {
            mFragmentList.add(fragment);
            mFragmentTitleList.add(title);
            notifyDataSetChanged();
        }
Dmitry Akishin
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