我知道里面有些问题,但没人帮我。

这是我的处境:

• 我有一张N个动态标签的列表。
• 其中一个选项卡(称之为“活动”)有一个包含一些true-false项的列表视图。
• 更改certains items的值,将在当前选项卡之前添加或删除选项卡(称为“detail”)。

要解释这种情况:

启动情况

制表符(粗体为当前选定的制表符)

家庭-细节-客户-工厂- 活动 -一些东西

• 在“活动”选项卡中,我更改了此复选框的选中值,这就是我希望成为的新情况:

家庭-客户-工厂- 活动 -一些东西

这就是我得到的:

我只有两个ESIT:

一: 一些东西 选定的选项卡标题和 活动 显示的内容

二: 活动 选定的选项卡标题和 一些东西 显示的内容

我想要的是添加删除显示 活动 选择制表符n和 活动 显示内容。

经过长时间的介绍,这是我的代码:

碎片状态页

private class PagerAdapter extends FragmentStatePagerAdapter {
    private int mNumOfTabs;
    private SparseArray<MyFragmentsInterface> activeFragments;
    private ArrayList<MyHeaderEnum> titles;

    MyFragmentsInterface getNewMeterFragmentIfAvailable(int position) {
        try {
            return activeFragments.get(position);
        } catch (Exception ex) {
            return null;
        }
    }

    PagerAdapter(FragmentManager fm, int NumOfTabs, ArrayList<MyHeaderEnum> titles) {
        super(fm);
        this.activeFragments = new SparseArray<>();
        this.mNumOfTabs = NumOfTabs;
        this.titles = titles;
    }


    @Override
    public int getItemPosition(@NonNull Object object) {
        //I played a lot with this part to manage the addiction-removal of tabs before current, but without succeed
        return super.getItemPosition(object);
    }

    void removetitle(int position) {
        if (position != -1 && position < titles.size()) {
            titles.remove(position);
            mNumOfTabs--;
            notifyDataSetChanged();
        }
    }

    void addTitle(int position, MyHeaderEnum title) {
        titles.add(position, title);
        mNumOfTabs++;
        notifyDataSetChanged();
    }

    @Override
    public int getCount() {
        return mNumOfTabs;
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        if (openedIntervention.isInPlace()) {
            activeFragments.get(position).save(false);
        }
        activeFragments.remove(position);

        super.destroyItem(container, position, object);
    }

    @Override
    public Fragment getItem(int position) {
        MyHeaderEnum currentTitle = titles.get(position);

        Bundle bundle = new Bundle();
        bundle.putString(_intervention_id_key, interventionID);

        currentFragment = newFragment;

        //this is to retrieve the correct content for the header
        switch (currentTitle) {
            case DETTAGLIO:
                InterventoDettaglioFragment interventoDettaglioFragment = new InterventoDettaglioFragment();
                interventoDettaglioFragment.setArguments(bundle);
                newFragment = interventoDettaglioFragment;
                return interventoDettaglioFragment;
                //... and so on
        }
        return null;
    }

    @NonNull
    @Override
    public Object instantiateItem(ViewGroup container, int position) {
        MyFragmentsInterface fragment = (MyFragmentsInterface) super.instantiateItem(container, position);

        activeFragments.put(position, fragment);

        return fragment;
    }

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

方法(在活动中)添加/删除选项卡:

public void manageTabBefore() {
    //pre-code to decide if it has to be added or not

    if (hasToBeAdded) {
        isTabAdded = true;
        adapter.addTitle(podTabIndex, MyHeaderEnum.POD);
    } else if (hasToBeRemoved) {
        isTabAdded = false;
        adapter.removetitle(podTabIndex);
    }
}

所选更改的选项卡布局

    tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() 
    {
        @Override
        public void onTabSelected(TabLayout.Tab tab) {
            //I also played a looooot with this
            int position = tab.getPosition();
            viewPager.setCurrentItem(position);
        }

        @Override
        public void onTabUnselected(TabLayout.Tab tab) {
        }

        @Override
        public void onTabReselected(TabLayout.Tab tab) {
        }
    });

我快要放弃了,我该怎么做才能在 不刷新当前选项卡 和 不更改所选选项卡 是吗?