如何在展开的ListView中设置容器宽度

// 自定义适配器
public class MyAdapter extends BaseAdapter {
    private List<String> data;
    private LayoutInflater inflater;

    public MyAdapter(Context context, List<String> data) {
        this.data = data;
        inflater = LayoutInflater.from(context);
    }

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

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

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

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder;
        if (convertView == null) {
            convertView = inflater.inflate(R.layout.list_item, parent, false);
            holder = new ViewHolder();
            holder.container = convertView.findViewById(R.id.container);
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }

        // 设置容器宽度
        ViewGroup.LayoutParams layoutParams = holder.container.getLayoutParams();
        layoutParams.width = 100; // 设置为固定值100dp
        holder.container.setLayoutParams(layoutParams);

        // 绑定数据
        String item = data.get(position);
        // ...

        return convertView;
    }

    static class ViewHolder {
        ViewGroup container;
        // ...
    }
}