ViewPager+Fragmnet組合動態添加和刪除Fragment

ViewPager+Fragmnet組合動態添加和刪除Fragment

最近項目需求需要動態的去刷新ViewPager

PagerAdapter mPagerAdapter = new PagerAdapter(getChildFragmentManager(), arrays);
mPagerAdapter.notifyDataSetChanged();   

然而notifyDataSetChanged();並不起作用

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• 查閱相關資料，繼承FragmentStatePagerAdapter才能做到動態添加和刪除

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private class PagerAdapter extends FragmentStatePagerAdapter {
    private String[] title;

    PagerAdapter(FragmentManager fm, String[] title) {
        super(fm);
        this.title = title;
    }

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

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


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

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        //解決viewpager重複加載數據
    }

    @Override
    public int getItemPosition(Object object) {
        //實現重新加載需返回此值
        return PagerAdapter.POSITION_NONE;
    }
}

• 完整代碼在初始化之前 先移除View,然後在創建PagerAdapter,在setAdapter

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mPager.removeAllViews();
mPager.removeAllViewsInLayout();    

PagerAdapter mPagerAdapter = new PagerAdapter(getChildFragmentManager(), arrays);
mPager.setAdapter(mPagerAdapter);
mTab.setupWithViewPager(mPager);