动态创建fragment

效果图—

依赖

主页面

package com.list.daohangguanli;
import android.support.design.widget.TabLayout;
import android.support.v4.app.Fragment;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;
import com.andy.library.ChannelActivity;
import com.list.daohangguanli.adapter.MyAdapter;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity {
private ViewPager pager;
private TabLayout tab;
private ImageView img;
private List<String> tabs = new ArrayList<>();
private List<Fragment> fragments = new ArrayList<>();

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    initView();
    //创建
    tabs.add("tab1");
    tabs.add("tab2");
    tabs.add("tab3");
    tabs.add("tab4");
    tabs.add("tab5");
    tabs.add("tab6");
    tabs.add("tab7");
    tabs.add("tab8");
    tabs.add("tab9");
    //模式
    tab.setTabMode(TabLayout.MODE_SCROLLABLE);
    //添加
    tab.addTab(tab.newTab().setText(tabs.get(0)));
    tab.addTab(tab.newTab().setText(tabs.get(1)));
    tab.addTab(tab.newTab().setText(tabs.get(2)));
    tab.addTab(tab.newTab().setText(tabs.get(3)));
    tab.addTab(tab.newTab().setText(tabs.get(4)));
    tab.addTab(tab.newTab().setText(tabs.get(5)));
    tab.addTab(tab.newTab().setText(tabs.get(6)));
    tab.addTab(tab.newTab().setText(tabs.get(7)));
    tab.addTab(tab.newTab().setText(tabs.get(8)));
    //适配器
    MyAdapter myAdapter = new MyAdapter(getSupportFragmentManager(), tabs);
    pager.setAdapter(myAdapter);
    //关联
    tab.setupWithViewPager(pager);
}
private void initView() {
    pager = findViewById(R.id.pager);
    tab = findViewById(R.id.tab);
    img = findViewById(R.id.img);
}
}

主布局

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="50dp"
    android:orientation="horizontal">

    <android.support.design.widget.TabLayout
        android:id="@+id/tab"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        app:tabMode="scrollable" />

    <ImageView
        android:id="@+id/img"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:src="@drawable/pindao" />
</LinearLayout>

<android.support.v4.view.ViewPager
    android:id="@+id/pager"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

</LinearLayout>

fragment页面

package com.list.daohangguanli.fragment;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;	
import com.list.daohangguanli.R;

public class Frag1 extends Fragment {
    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.frag1, container, false);
    return view;
}
public static Frag1 newInstance(int index) {
    Frag1 frag1 = new Frag1();
    Bundle bundle = new Bundle();
    bundle.putInt("index", index);
    frag1.setArguments(bundle);
    return frag1;
}
}

fragment布局

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

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="fragment" />
</android.support.constraint.ConstraintLayout>

适配器

package com.list.daohangguanli.adapter;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import com.list.daohangguanli.fragment.Frag1;
import java.util.List;
public class MyAdapter extends FragmentPagerAdapter {
List<String> tabs;
public MyAdapter(FragmentManager fm, List<String> tabs) {
    super(fm);
    this.tabs = tabs;
}

@Override
public Fragment getItem(int i) {
    Frag1 frag1 = Frag1.newInstance(i);
    return frag1;
}

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

@Nullable
@Override
public CharSequence getPageTitle(int position) {
    return tabs.get(position);
}
}