FragmentPagerAdapter動態增刪Fragment不更新

public class ResumePreviewAdapter extends FragmentPagerAdapter {
    private ArrayList<Fragment> fragments;
    private String[] tabTitles;


    public ResumePreviewAdapter(FragmentManager fm, ArrayList<Fragment> fragments, String[] tabTitles) {
        super(fm);
        this.fragments = fragments;
        this.tabTitles = tabTitles;
    }

    @Override
    public Fragment getItem(int position) {
        if (null != fragments && position > -1 && position < fragments.size()) {
            return fragments.get(position);
        }
        return null;
    }

    @Override
    public int getCount() {
        return fragments == null ? 0 : fragments.size();
    }


    @Override
    public long getItemId(int position) {
        // 獲取當前數據的hashCode
        int hashCode = fragments.get(position).hashCode();
        return hashCode;
    }

    @Override
    public Parcelable saveState() {
        return null;
    }

    /**
     * 使用這個方式，讓頁面不緩存，能夠在清除fragment的時候對其做了刪除
     * 複寫pageradapter的getItemPosition方法設置tag爲POSITION_NONE意思是沒有找到child要求重新加載。
     *
     * @return
     */
    @Override
    public int getItemPosition(@NonNull Object object) {
        return PagerAdapter.POSITION_NONE;
    }

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

    @Override
    public void finishUpdate(ViewGroup container) {
        // 避免 android.os.Handler android.support.v4.app.FragmentHostCallback.getHandler()' on a null object reference
        // bugly ：https://bugly.qq.com/v2/crash-reporting/crashes/2390cd07d3/107320?pid=1
        try {
            super.finishUpdate(container);
        } catch (Exception egnore) {
        }
    }
}