Flutter 如何更改列表中单个按钮的颜色-颤振

当用户选择一个选项时，我在尝试更改按钮的颜色时遇到问题。如何在单击时选择所选索引并更改其颜色

提前谢谢 我在下面添加了我的代码和屏幕截图

  List<dynamic> getChoices() {
    var choices = []; //
    for (int i = 0; i < choicesText.length; i++) {
      var eachChoice = choicesText[i]['name'];

      var newChoice = Expanded(
        child: Padding(
          padding: EdgeInsets.all(15.0),
          child: FlatButton(
            color: Colors.red,
            child: Text(
              eachChoice,
              style: TextStyle(
                fontSize: 20.0,
                color: Colors.white,
              ),
            ),
            onPressed: () {
              //The user picked this button.
              userChoice = eachChoice;
            },
          ),
        ),
      );
      choices.add(newChoice);
    }
    return choices;
  }

List getChoices（）{
var选择=[]//
for（int i=0；i

---

您可以创建一个

var

并设置一个小部件，我希望它对您有用

List<dynamic> getChoices() {
        var choices = []; //
        for (int i = 0; i < choicesText.length; i++) {
          var eachChoice = choicesText[i]['name'];

      var colorChoice = if (eachChoice  = 1) return Colors.red else return  Colors.red
    
          var newChoice = Expanded(
            child: Padding(
              padding: EdgeInsets.all(15.0),
              child: FlatButton(
                color: colorChoice,
                child: Text(
                  eachChoice,
                  style: TextStyle(
                    fontSize: 20.0,
                    color: Colors.white,
                  ),
                ),
                onPressed: () {
                  //The user picked this button.
                  userChoice = eachChoice;
                },
              ),
            ),
          );
          choices.add(newChoice);
        }
        return choices;
      }

List getChoices（）{
var选择=[]//
for（int i=0；i