tablayout+viewpager适配

//布局

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.design.widget.TabLayout
        android:id="@+id/my_Tab"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"

        app:tabGravity="center">

    </android.support.design.widget.TabLayout>

    <android.support.v4.view.ViewPager
        android:id="@+id/vp"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@+id/my_Tab"></android.support.v4.view.ViewPager>
</RelativeLayout>

//activity

//fragment

public class ShowVpFragment extends Fragment {

    private TabLayout my_tab;
    private ViewPager view_pager;
    private List<DataType> list;

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.show_frag, container, false);
        my_tab = v.findViewById(R.id.my_Tab);
        view_pager = v.findViewById(R.id.vp);
        initType();
        /*for (int i = 0; i <5 ; i++) {
            my_tab.addTab(my_tab.newTab().setText(list.get(i).getmTitle()));
        }*/
        view_pager.setAdapter(new MyVpAdapter(getChildFragmentManager()));
        my_tab.setupWithViewPager(view_pager);
        return v;
    }

    private void initType() {
        list = new ArrayList<>();
        list.add(new DataType("数据新闻","数据新闻"));
        list.add(new DataType("快讯","快讯"));
        list.add(new DataType("头条","头条"));
        list.add(new DataType("精编公告","精编公告"));
        list.add(new DataType("社会","社会"));
    }
    class MyVpAdapter extends FragmentPagerAdapter{
        public MyVpAdapter(FragmentManager fm) {
            super(fm);
        }

        @Override
        public CharSequence getPageTitle(int position) {
            return list.get(position).getmTitle();
        }

        @Override
        public Fragment getItem(int position) {

            ContentFragment contentFragment = new ContentFragment();
            Bundle bundle = new Bundle();
            bundle.putString("type",list.get(position).getmType());
            contentFragment.setArguments(bundle);
            return contentFragment;
        }

        @Override
        public int getCount() {
            return list.size();
        }
    }
}

//子fragment

public class ContentFragment extends Fragment {

    private TextView text;

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.content_frag, container, false);
        text = v.findViewById(R.id.ttv);
        return v;
    }

    @Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        Bundle arguments = getArguments();
        String type = arguments.getString("type");
        text.setText(type+"~~~~~");
    }
}