使用onClick从适配器更改ListView项布局

public class MyAdapter extends BaseAdapter {
    private Context mContext;
    private List<Item> mItemList;

    public MyAdapter(Context context, List<Item> itemList) {
        mContext = context;
        mItemList = itemList;
    }

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

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

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

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

        final Item item = mItemList.get(position);
        holder.textView.setText(item.getText());

        convertView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (item.isExpanded()) {
                    // 如果当前项已展开，则将布局改为折叠状态
                    v.findViewById(R.id.expanded_layout).setVisibility(View.GONE);
                    item.setExpanded(false);
                } else {
                    // 如果当前项未展开，则将布局改为展开状态
                    v.findViewById(R.id.expanded_layout).setVisibility(View.VISIBLE);
                    item.setExpanded(true);
                }
            }
        });

        return convertView;
    }

    private static class ViewHolder {
        TextView textView;
    }
}