如何在Flutter中的showModalBottomSheet上添加按钮(或其他小部件)？

void _showBottomSheet(BuildContext context) {
  showModalBottomSheet(
    context: context,
    builder: (BuildContext context) {
      return Column(
        mainAxisSize: MainAxisSize.min,
        children: <Widget>[
          ListTile(
            leading: Icon(Icons.photo),
            title: Text('Choose from Gallery'),
            onTap: () {
              // 执行选择图片的逻辑
              Navigator.pop(context);
            },
          ),
          ListTile(
            leading: Icon(Icons.camera),
            title: Text('Take a Photo'),
            onTap: () {
              // 执行拍照的逻辑
              Navigator.pop(context);
            },
          ),
          // 其他小部件
        ],
      );
    },
  );
}