Fragment里面嵌套一个tablayout+

fragment

package com.example.yuekaoone.fragment;


import android.app.Fragment;
import android.support.design.widget.TabLayout;
import android.support.v4.view.ViewPager;
import android.view.View;

import com.example.yuekaoone.R;
import com.example.yuekaoone.adapter.ViewPagerAdapter;
import com.example.yuekaoone.adapter.ViewPagerTwoAdapter;

import java.util.ArrayList;
import java.util.List;

/**
 * A simple {@link Fragment} subclass.
 */
public class BFragment extends BaseFragment {
    ViewPager viewpager;
    TabLayout tab;
    List<Fragment> list;
    ViewPagerTwoAdapter adapter;

    @Override
    protected void inintdata(View view) {
        list = new ArrayList<>();
        list.add(new B1Fragment());
        list.add(new B2Fragment());
        adapter = new ViewPagerTwoAdapter(getChildFragmentManager());
        adapter.setdata(list);

        tab.setupWithViewPager(viewpager);
        viewpager.setAdapter(adapter);
    }

    @Override
    protected void inintView(View view) {
        viewpager = view.findViewById(R.id.viewpager);
        tab = view.findViewById(R.id.tab);
    }

    @Override
    protected int setcontent() {
        return R.layout.fragment_b;
    }

}

布局

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".fragment.AFragment">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

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

            ></android.support.design.widget.TabLayout>
        <android.support.v4.view.ViewPager
            android:id="@+id/viewpager"
            android:layout_width="match_parent"
            android:layout_height="wrap_content">


        </android.support.v4.view.ViewPager>

    </LinearLayout>

</FrameLayout>

adapter

package com.example.yuekaoone.adapter;

import android.app.Fragment;
import android.app.FragmentManager;
import android.support.annotation.Nullable;
import android.support.v13.app.FragmentPagerAdapter;

import java.util.ArrayList;
import java.util.List;

public class ViewPagerTwoAdapter extends FragmentPagerAdapter {
    List<Fragment> list;
    /**
     * @param fm
     * @deprecated
     */
    public ViewPagerTwoAdapter(FragmentManager fm) {
        super(fm);
        list =new ArrayList<>();
    }

    public void setdata(List<Fragment> list){
        this.list.clear();
        this.list.addAll(list);
        notifyDataSetChanged();

    }

    @Nullable
    @Override
    public CharSequence getPageTitle(int position) {
        switch (position){
            case 0:
                return "第一";
            case 1:
                return "第二";
        }
        return null;
    }

    /**
     * @param i
     * @deprecated
     */
    @Override
    public Fragment getItem(int i) {
        Fragment fragment = list.get(i);

        return fragment;
    }

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

最后

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