我需要在 Flutter for Android 和 iOS 的行元素上实现长按选择。有什么帮助吗?

我的代码到目前为止:

class ListElement extends StatelessWidget {
  ListElement({this.text, this.name, this.mId, this.animationController});

  final String text;
  final String name;
  final String mId;
  final AnimationController animationController; 

  @override
  Widget build(BuildContext context) {
    return new GestureDetector(
      onTap: () {
         Navigator.of(context).push(
                  new MaterialPageRoute(builder: (BuildContext context) => new DrugProfile(drugmId))
                );
      }, 
      onLongPress: () {
       //HERE I NEED TO SELECT MULTIPLE ROWS IF IT FIRES
      }, 

      child: new SizeTransition(
        sizeFactor: new CurvedAnimation(
            parent: animationController, curve: Curves.easeOut),
        axisAlignment: 0.0,
        child: new Container(
          margin: const EdgeInsets.symmetric(vertical: 10.0),
          child: new Row(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: <Widget>[
              new Container(
                margin: const EdgeInsets.only(right: 16.0),
                child: new CircleAvatar(child: new Text(name[0].toUpperCase())),
              ),
              new Expanded(
                child: new Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: <Widget>[
                    new Text(name, style: Theme.of(context).textTheme.subhead),
                    new Container(
                      margin: const EdgeInsets.only(top: 5.0),
                      child: new Text(
                        text,
                        textAlign: TextAlign.left,
                        style: new TextStyle(
                        fontSize: 13.0,),
                      ),
                    ),
                  ],
                ),
              ),
            ],
          ),
        )
      )
    );
  }
}

也许我从 onLongPress 事件开始是错的,但我需要做以下事情:如果 longPress 在一个行元素上,那么提供选择许多行的能力。选择之后然后对行执行自定义操作(这不是问题:)的一部分)选择后我想象一个索引数组,我可以将其传递给函数以进行进一步的处理。我只需要多个元素选择的帮助。