如何在恢复JSON文件时刷新ViewPager中的选项卡？

Question

我在viewpager中有3个标签，我正在使用从FragmentPagerAdapter扩展的ViewPagerAdapter。我想在收到新的json文件时刷新标签！ json文件将在片段（标签）的onCreatView方法中解析，但正如我所说，我不知道如何刷新标签以从json文件中获取新数据并再次解析它！ 我想将刷新代码放在主要活动的onResume方法中 PLZ帮助我，谢谢先进

private void designOfTabLayout() {
    if (getSupportActionBar() != null) {
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
    }
    viewPager = (ViewPager) findViewById(R.id.viewpager);
    if(viewPager!=null){
        viewPager.setOffscreenPageLimit(4);
        setupViewPager(viewPager);
    }

    tabLayout = (TabLayout) findViewById(R.id.tabs);
    if (tabLayout != null) {
        tabLayout.setLayoutDirection(View.LAYOUT_DIRECTION_LTR);
        tabLayout.setupWithViewPager(viewPager);
        this.setTabIcons();
        this.changeTabsFont();

    }
}



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();
    }

    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) {
    adapter = new ViewPagerAdapter(getSupportFragmentManager());
    teamsFragment=new TeamsFragment();
    dutiesFragment=new DutiesFragment();
    projectsFragment=new ProjectsFragment();

    adapter.addFragment(dutiesFragment, "Duties");
    adapter.addFragment(projectsFragment, "Projects");
    adapter.addFragment(teamsFragment, "Teams");

    viewPager.setAdapter(adapter);
    // For Opening Team Tab First :
    viewPager.setCurrentItem(2);

}