如何在ListView中添加ExpandableListView？

// 自定义适配器类
class MyAdapter extends BaseAdapter implements ExpandableListView.OnGroupClickListener, ExpandableListView.OnChildClickListener {
    private List<String> groups;  // Group数据源
    private List<List<String>> children;  // Child数据源

    public MyAdapter(List<String> groups, List<List<String>> children) {
        this.groups = groups;
        this.children = children;
    }

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

    @Override
    public Object getItem(int position) {
        return groups.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        if (convertView == null) {
            convertView = LayoutInflater.from(parent.getContext()).inflate(R.layout.listview_item, parent, false);
        }

        TextView textView = convertView.findViewById(R.id.textView);
        ExpandableListView expandableListView = convertView.findViewById(R.id.expandableListView);

        textView.setText(groups.get(position));

        // 创建ExpandableListAdapter
        ExpandableListAdapter adapter = new ExpandableListAdapter(children.get(position));

        expandableListView.setAdapter(adapter);
        expandableListView.setOnGroupClickListener(this);
        expandableListView.setOnChildClickListener(this);

        return convertView;
    }

    @Override
    public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) {
        // 处理Group的点击事件
        return false;
    }

    @Override
    public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) {
        // 处理Child的点击事件
        return false;
    }
}

// 自定义ExpandableListAdapter类
class ExpandableListAdapter extends BaseExpandableListAdapter {
    private List<String> children;

    public ExpandableListAdapter(List<String> children) {
        this.children = children;
    }

    @Override
    public int getGroupCount() {
        return 1;
    }

    @Override
    public int getChildrenCount(int groupPosition) {
        return children.size();
    }

    @Override
    public Object getGroup(int groupPosition) {
        return null;
    }

    @Override
    public Object getChild(int groupPosition, int childPosition) {
        return null;
    }

    @Override
    public long getGroupId(int groupPosition) {
        return 0;
    }

    @Override
    public long getChildId(int groupPosition, int childPosition) {
        return 0;
    }

    @Override
    public boolean hasStableIds() {
        return false;
    }

    @Override
    public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
        if (convertView == null) {
            convertView = LayoutInflater.from(parent.getContext()).inflate(R.layout.expandable_group, parent, false);
        }

        TextView textView = convertView.findViewById(R.id.textView);
        textView.setText("Group");

        return convertView;
    }

    @Override
    public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
        if (convertView == null) {
            convertView = LayoutInflater.from(parent.getContext()).inflate(R.layout.expandable_child, parent, false);
        }

        TextView textView = convertView.findViewById(R.id.textView);
        textView.setText(children.get(childPosition));

        return convertView;
    }

    @Override
    public boolean isChildSelectable(int groupPosition, int childPosition) {
        return true;
    }
}

// 在Activity中使用
public class MainActivity extends AppCompatActivity {
    private ListView listView;

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

        listView = findViewById(R.id.listView);

        // 创建数据源
        List<String> groups = new ArrayList<>();
        groups.add("Group 1");
        groups.add("Group 2");

        List<List<String>> children = new ArrayList<>();
        List<String> group1Children = new ArrayList<>();
        group1Children.add("Child 1-1");
        group1Children.add("Child 1-2");

        List<String> group2Children = new ArrayList<>();
        group2Children.add("Child 2-1");
        group2Children.add("Child 2-2");

        children.add(group1Children);
        children.add(group2Children);

        // 创建适配器并设置给ListView
        MyAdapter adapter = new MyAdapter(groups, children);
        listView.setAdapter(adapter);
    }
}