我正在尝试用动态数据创建一个ReorderableListView。额外的间隔位于列表的底部。任何帮助将不胜感激。

class _MyHomePageState extends State {

  List<String> _listData = ["1","2","3","4","5","6","7","8","9","10","11","12","13","14","15"];


  @override
  Widget build(BuildContext context) {

    return Scaffold(
      key: _scaffoldKey,backgroundColor: Colors.lightGreen,appBar: AppBar(
        title: Text("Listview Drag and Drop"),backgroundColor: Colors.deepOrange,),body: Center(

        child: ReorderableListView(
          header:
          Container(
             margin: EdgeInsets.only(top: 10),decoration: BoxDecoration(
                color: Colors.deepPurple,border: Border.all(color: Colors.white,width: 2),borderRadius: BorderRadius.all(Radius.circular(4))
            ),child: Padding(
              padding: const EdgeInsets.all(8.0),child: Text("ReorderableListView",textAlign: TextAlign.start,style: TextStyle(color: Colors.white,fontSize: 18),children: [
              for(final item in _listData) getchildItems(item,context)
            ],onReorder: (oldIndex,newIndex){

                _updateMyItems(oldIndex,newIndex);


            }
        ),);
  }

  getchildItems(_item,_context) {
    return Padding(
      key: ValueKey(_item),padding: const EdgeInsets.all(8.0),child: InkWell(
        onTap: (){},child: Container(
          width: double.infinity,decoration: BoxDecoration(
            color: Colors.white,borderRadius: BorderRadius.all(Radius.circular(4))
          ),child: Padding(
            padding: const EdgeInsets.all(8.0),child: Text(_item+" Items",style: TextStyle(color: Colors.black54,);
   }

  _updateMyItems(int old,int newIndex)
  {
    setState(() {

      if(newIndex>old)
        {
          newIndex-=1;
        }
        var item=_listData.removeAt(old);
      _listData.insert(newIndex,item);


    });

  }
}