Flutter 如何消除在颤振中运行的范围错误？

我已经创建了一个字符串列表并应用了一个复选框，当复选框单击时，字符串列表将显示在下一个屏幕上，但我得到了一个范围错误。请帮忙

var _suggestions = <String>['this is me1','this is me2','this is me3' ];
final _saved = <String>['this is me1','this is me2','this is me3' ];
final _biggerFont = TextStyle(fontSize: 18.0);

---

这是构建行函数

我们也可以使用ListView.separated

ListView.separated(
padding: EdgeInsets.all(16.0),
itemBuilder: (context, index) {
  return _buildRow(_suggestions[index]);
},
separatorBuilder: (_, __) => Divider(),
itemCount: _suggestions.length);

---

该范围错误已消失，但三个字符串值中有一个不可见。您能给我看一下\u buildRow函数吗？好的，我现在添加了\u buildRow fxn。看起来\u buildRow函数中没有问题。请在使用ListView.separated（）之前检查_suggestions.length；

 Widget _buildSuggestions() {
return ListView.builder(
    padding: EdgeInsets.all(16.0),
    itemBuilder: /*1*/ (context, i) {
      if (i.isOdd) return Divider(); /*2*/
      final index = i ~/ 2; /*3*/
      _suggestions = <String>['this is me1','this is me2','this is me3'];
     
      return _buildRow(_suggestions[index]);
    });
    }

Widget _buildRow(String pair) {
final alreadySaved = _saved.contains(pair);
return Container(
  decoration: new BoxDecoration (
      color: HexColor('#F2FFFF'),
    border: Border.all(color: HexColor('#09B9B6')),
    borderRadius: BorderRadius.all(Radius.circular(20)),
  ),
  child: ListTile(
    title: Text(
      pair,
      style: _biggerFont,
    ),
    trailing: Icon(
      alreadySaved ? Icons.check_box : Icons.check_box_outline_blank_outlined,
      color: alreadySaved ? HexColor('#09B9B6') :null,
    ),
    onTap: (){
      setState(() {
        if (alreadySaved){
          _saved.remove(pair);
        }
        else{
          _saved.add(pair);
        }
      });
    },
  ),
);
  }

ListView.separated(
padding: EdgeInsets.all(16.0),
itemBuilder: (context, index) {
  return _buildRow(_suggestions[index]);
},
separatorBuilder: (_, __) => Divider(),
itemCount: _suggestions.length);