自己用的，TabLayout+ViewPager

布局和属性，主要是TabLayout属性

<androidx.constraintlayout.widget.Group
        android:id="@+id/group_video"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:visibility="visible"
        app:constraint_referenced_ids="tabLayout,viewPager"/>
    <com.google.android.material.tabs.TabLayout
        android:id="@+id/tabLayout"
        android:layout_width="800dp"
        android:layout_height="70dp"
        android:layout_marginLeft="50dp"
        android:orientation="horizontal"
        app:tabTextColor="@color/color_FEFEFE"
        app:tabSelectedTextColor="@color/color_FEFEFE"
        app:tabIndicatorFullWidth="false"
        app:tabRippleColor="@null"
        app:tabIndicatorColor="@color/color_FF8829"
        app:tabIndicatorHeight="5dp"
        app:tabPaddingStart="50dp"
        app:tabPaddingEnd="50dp"
        app:tabTextAppearance="@style/TabLayoutTextStyle"
        >
        <com.google.android.material.tabs.TabItem
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="已下载"/>
        <com.google.android.material.tabs.TabItem
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Url在线看"/>
        <com.google.android.material.tabs.TabItem
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="未下载"/>
    </com.google.android.material.tabs.TabLayout>

    <androidx.viewpager.widget.ViewPager
        android:id="@+id/viewPager"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintTop_toBottomOf="@+id/tabLayout"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        android:layout_marginTop="18dp"
        android:layout_marginLeft="30dp"/>

字体样式

<style name="TabLayoutTextStyle" parent="TextAppearance.Design.Tab">
     <item name="android:textSize">32sp</item>
</style>

java简单代码

tabLayout.setupWithViewPager(mViewPager);
mViewPager.setOffscreenPageLimit(3);

mViewPager.setAdapter(adapter);


public class ViewpagerAdapter extends FragmentPagerAdapter {

    private List<Fragment> mList;
    private String[] mtitles;
    public FileResourceViewpagerAdapter(@NonNull FragmentManager fm, List<Fragment> list , String[] titles) {
        super(fm, BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT);
        mList=list;
        mtitles=titles;
    }

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

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

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