我的解决方案通过使用列表视图我有5个容器，当点击容器小部件时，会更新当前的索引并改变颜色

class _MyHomePageState extends State<MyHomePage> {
  int currentIndex = 0;  // to save user click index 
  bool firstClick = false; // checking flag when first build and keep item color white 

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
        title: Text(widget.title),
      ),
      body: Center(
        child: ListView.builder(
            itemCount: 5,
            itemBuilder: (context, index) {
              return InkWell(
                  onTap: () {
                    setState(() {
                      this.currentIndex = index;
                      this.firstClick = true;
                    });
                  },
                  child: firstClick
                      ? currentIndex == index
                          ? Container(
                              // A fixed-height child.
                              color: const Color(0xffeeee00), // Yellow
                              height: 100.0,
                              alignment: Alignment.center,
                              child: Text("Content ${index}"),
                            )
                          : Container(
                              // A fixed-height child.
                              color: Colors.lightBlue, // Yellow
                              height: 100.0,
                              alignment: Alignment.center,
                              child: Text('Content ${index}'),
                            )
                      : Container(
                          // A fixed-height child.
                          color: Colors.white, // Yellow
                          height: 100.0,
                          alignment: Alignment.center,
                          child: Text("Content ${index}"),
                        ));
            }),
      ),
    );
  }
}

Have Nice Day：）

您需要使用三元运算符（如

(col == Colors.white) ? col = Colors.red:col : col = Colors.blue;

或者

col =  col == Colors.white? Colors.red:col : Colors.blue;

但如果你对所有三个容器都使用单一变量，它将改变它们。尝试使用List代替。

class CContainerChanged extends StatefulWidget {
  const CContainerChanged({super.key});

  @override
  State<CContainerChanged> createState() => _CContainerChangedState();
}

class _CContainerChangedState extends State<CContainerChanged> {
  List<Color> containerColors = [
    Colors.cyanAccent,
    Colors.deepPurpleAccent,
    Colors.deepOrangeAccent,
  ];
  @override
  Widget build(BuildContext context) {
    return Scaffold(
        body: Center(
      child: Column(
        children: [
          for (int i = 0; i < containerColors.length; i++)
            Container(
              width: 100,
              height: 100,
              color: containerColors[i],
              child: TextButton(
                onPressed: () {
                  setState(() {
                    containerColors[i] = Colors.red;
                  });
                },
                child: Text('Change color'),
              ),
            ),
        ],
      ),
    ));
  }
}

如果是关于选择单个容器，则会

class CContainerChanged extends StatefulWidget {
  const CContainerChanged({super.key});

  @override
  State<CContainerChanged> createState() => _CContainerChangedState();
}

class _CContainerChangedState extends State<CContainerChanged> {
  List<Color> containerColors = [
    Colors.cyanAccent,
    Colors.deepPurpleAccent,
    Colors.deepOrangeAccent,
  ];

  int? selectedIndex;
  @override
  Widget build(BuildContext context) {
    return Scaffold(
        body: Center(
      child: Column(
        children: [
          for (int i = 0; i < containerColors.length; i++)
            Container(
              width: 100,
              height: 100,
              color:  selectedIndex == i ? Colors.red : containerColors[i],
              child: TextButton(
                onPressed: () {
                  setState(() {
                    selectedIndex = i;
                  });
                },
                child: Text('Change color'),
              ),
            ),
        ],
      ),
    ));
  }
}