创建一个水平和垂直可展开的ListView

要创建一个水平和垂直可展开的ListView，你可以使用NestedScrollView和RecyclerView组合在一起。下面是一个示例代码：

activity_main.xml：

<?xml version="1.0" encoding="utf-8"?>
<androidx.core.widget.NestedScrollView 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"
    android:fillViewport="true"
    tools:context=".MainActivity">

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

        <TextView
            android:id="@+id/title1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:padding="16dp"
            android:text="Section 1"
            android:textStyle="bold" />

        <androidx.recyclerview.widget.RecyclerView
            android:id="@+id/list1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" />

        <TextView
            android:id="@+id/title2"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:padding="16dp"
            android:text="Section 2"
            android:textStyle="bold" />

        <androidx.recyclerview.widget.RecyclerView
            android:id="@+id/list2"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" />

    </LinearLayout>

</androidx.core.widget.NestedScrollView>

MainActivity.java：

import android.os.Bundle;

import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

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

public class MainActivity extends AppCompatActivity {

    private RecyclerView list1, list2;
    private List<String> data1, data2;
    private boolean isList1Expanded, isList2Expanded;

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

        list1 = findViewById(R.id.list1);
        list2 = findViewById(R.id.list2);

        data1 = new ArrayList<>();
        data1.add("Item 1");
        data1.add("Item 2");
        data1.add("Item 3");

        data2 = new ArrayList<>();
        data2.add("Item A");
        data2.add("Item B");
        data2.add("Item C");

        final LinearLayoutManager layoutManager1 = new LinearLayoutManager(this);
        final LinearLayoutManager layoutManager2 = new LinearLayoutManager(this);

        final ListAdapter adapter1 = new ListAdapter(data1);
        final ListAdapter adapter2 = new ListAdapter(data2);

        list1.setLayoutManager(layoutManager1);
        list1.setAdapter(adapter1);

        list2.setLayoutManager(layoutManager2);
        list2.setAdapter(adapter2);

        adapter1.setOnItemClickListener(new ListAdapter.OnItemClickListener() {
            @Override
            public void onItemClick(int position) {
                if (isList1Expanded) {
                    data1.remove(position + 1);
                    adapter1.notifyItemRemoved(position + 1);
                } else {
                    data1.add(position + 1, "Subitem " + (position + 1));
                    adapter1.notifyItemInserted(position + 1);
                }
                isList1Expanded = !isList1Expanded;
            }
        });

        adapter2.setOnItemClickListener(new ListAdapter.OnItemClickListener() {
            @Override
            public void onItemClick(int position) {
                if (isList2Expanded) {
                    data2.remove(position + 1);
                    adapter2.notifyItemRemoved(position + 1);
                } else {
                    data2.add(position + 1, "Subitem " + (position + 1));
                    adapter2.notifyItemInserted(position + 1);
                }
                isList2Expanded = !isList2Expanded;
            }
        });
    }
}

ListAdapter.java：

import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;

import java.util.List;

public class ListAdapter extends RecyclerView.Adapter<ListAdapter.ViewHolder> {

    private List<String> data;
    private OnItemClickListener listener;

    public interface OnItemClickListener {
        void onItemClick(int position);
    }

    public ListAdapter(List<String> data) {
        this.data = data;
    }

    public void setOnItemClickListener(OnItemClickListener listener) {
        this.listener = listener;
    }

    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(android.R.layout.simple_list_item_1, parent, false);
        return new ViewHolder(view);
    }

    @