I used this code but select all buttons like a checkbox

ListView.builder(
                              shrinkWrap: true,
                              physics: ClampingScrollPhysics(),
                              itemCount: sampleData.length,
                              itemBuilder: (context, index) => ButtonBar(
                                alignment: MainAxisAlignment.center,
                                children: <Widget>[
                                  Radio(
                                    groupValue: groupValue[index],
                                    value: value[index][0],
                                    onChanged: (newValue) => setState(() => groupValue[index] = newValue as int),
                                  ),
                                  
                                ],
                              ),
                            ),

Please correct me where I am wrong

i want to create like this with dynamically and one selection at a time.

CodePudding user response：

First create a Model class like tis;

class ItemModel {
  final String title;
  final int value;
  ItemModel({required this.title, required this.value});
}

then create a list like this:

List<ItemModel> _testList = [
    ItemModel(title: 'test1', value: 0),
    ItemModel(title: 'test2', value: 1),
    ItemModel(title: 'test3', value: 2),
  ];

  var groupValue = -1;

then use this:

ListView.builder(
              physics: ClampingScrollPhysics(),
              itemCount: _testList.length,
              itemBuilder: (context, index) => ButtonBar(
                alignment: MainAxisAlignment.spaceBetween,
                children: <Widget>[
                  Text(_testList[index].title),
                  Radio(
                    groupValue: groupValue,
                    value: _testList[index].value,
                    onChanged: (newValue) =>
                        setState(() => groupValue = newValue as int),
                  ),
                ],
              ),
            )

CodePudding user response：

first of all, You have used a stateful widget for each button. after that, you have defined a boolean variable in that class. finally, you have called a setState when u press on it. something like this:

ListView.builder(
          physics: ClampingScrollPhysics(),
          itemCount: _testList.length,
          itemBuilder: (context, index) => Test()
        );

second class:

class Test extends StatefulWidget {
  const Test({Key? key}) : super(key: key);

  @override
  State<Test> createState() => _TestState();
}

class _TestState extends State<Test> {
  bool active = false;
  @override
  Widget build(BuildContext context) {
    return Row(
      children: [
        Checkbox(
            value: active,
            onChanged: (v) {
              setState(() {
                active = v!;
              });
            }),
            Text("text")
      ],
    );
  }
}