1. 效果

在这里插入图片描述

1. 添加ViewPager2控件

在activity_main.xml中添加 androidx.viewpager2.widget.ViewPager2 控件，有些版本可能提示无此控件，需要在 build.gradle中添加依赖：implementation 'androidx.viewpager2:viewpager2:1.0.0'

添加ViewPager2控件后，activity_main.xml代码如下：

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <androidx.viewpager2.widget.ViewPager2
        android:id="@+id/viewpager"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

2. MainActivity.java中添加ViewPager2

public class MainActivity extends AppCompatActivity {

    private ViewPager2 mViewPager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mViewPager = findViewById(R.id.viewpager);

        List<String> dataList = new ArrayList<>();
        dataList.add("你");
        dataList.add("好");
        dataList.add("啊");
        dataList.add("你");
        dataList.add("是");
        dataList.add("谁");
        dataList.add("啊");
        mViewPager.setAdapter(new ViewPagerAdapter(dataList));
    }
}

写mViewPager.setAdapter(new ViewPagerAdapter(dataList));这行代码时，先写下来，然后用 alt + enter 快捷键提示添加 ViewPagerAdapter 类。
创建完 ViewPagerAdapter 类后，先放着，创建ViewPager中的页面

3. 创建ViewPager中的页面

在 Layout 右键，new -> Layout Resource File，创建一个xml，名字随意
在这里插入图片描述
item_pager.xml里面的代码：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/itme_container"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center_vertical"
    android:orientation="vertical">

    <TextView
        android:id="@+id/item_tv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:textSize="30sp" />

</LinearLayout>

4. 添加ViewPagerAdapter类代码

public class ViewPagerAdapter extends RecyclerView.Adapter<ViewPagerAdapter.ViewPagerHolder> {

    private List<String> mDataList;
    private List<Integer> mItemColorList;

    public ViewPagerAdapter(List<String> data){
        mDataList = data;

        mItemColorList = new ArrayList<>();
        mItemColorList.add(Color.parseColor("#feeeed"));
        mItemColorList.add(Color.parseColor("#fedcbd"));
        mItemColorList.add(Color.parseColor("#817936"));
        mItemColorList.add(Color.parseColor("#b2d235"));
        mItemColorList.add(Color.parseColor("#64492b"));
        mItemColorList.add(Color.parseColor("#817936"));
        mItemColorList.add(Color.parseColor("#fffffb"));
    }

    @NonNull
    @Override
    public ViewPagerAdapter.ViewPagerHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        return new ViewPagerHolder(LayoutInflater.from(parent.getContext()).inflate(R.layout.item_pager, parent, false));
    }

    @Override
    public void onBindViewHolder(@NonNull ViewPagerHolder holder, int position) {
        holder.mItemTv.setText(mDataList.get(position));
        holder.mItemContainer.setBackgroundColor(mItemColorList.get(position));
    }


    @Override
    public int getItemCount() {
        return mDataList.size();
    }


    class ViewPagerHolder extends RecyclerView.ViewHolder{
        LinearLayout mItemContainer;
        TextView mItemTv;

        public ViewPagerHolder(@NonNull View itemView) {
            super(itemView);

            mItemContainer = itemView.findViewById(R.id.itme_container);
            mItemTv = itemView.findViewById(R.id.item_tv);
        }
    }
}