Fragment里面嵌套Fragment的问题

最近两天做项目时，要在fragment里面嵌套Fragment，最开始使用Fragment的hide,show等方法一直失败，，如图，message是一个fragment，在里面又有两个子fragment,(Firends和follow)，后来把两个fragment改ViewPager方式进行切换，这时一定要注意msgAdapter=new FragmentMessagePagerAdapter(getChildFragmentManager());在new PagerAdapter时，一定要传入getChildFragmentManager(),而不是getSupportFragmentManager，

一级Fragment里的OnCreateView方法：

@Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {

        mActivity = getActivity();
        View view = inflater.inflate(R.layout.activity_fragment_message,container,false);

        Button btnFriends= (Button) view.findViewById(R.id.btn_friends);
        Button btnFollow= (Button) view.findViewById(R.id.btn_follow);
        btnFriends.setOnClickListener(this);
        btnFollow.setOnClickListener(this);

        vp = (NoScrollViewPager) view.findViewById(R.id.vp_noscroll);

        list_fragments=new ArrayList<Fragment>();

        //把两个子fragment实例化然后装到集合里
        mFrendsFragment=new Message_Friends_Fragment();
        list_fragments.add(mFrendsFragment);
        mFollowFragment=new Message_Follow_Fragment();
        list_fragments.add(mFollowFragment);

        msgAdapter=new FragmentMessagePagerAdapter(getChildFragmentManager());

        vp.setAdapter(msgAdapter);

        return view;
    }