Flutter 无状态窗口小部件列固定白色

即使我给它一个背景色，它仍然是白色的。它以前工作得很好，但它只是不可修复的

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在删除代码之前

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删除代码后

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使用

容器（）小部件包装列，并将所需颜色传递给
颜色：
属性。如果
Material（）
小部件中的
颜色：
不起作用

PS：这应该也适用于
StatelefulWidgets

像这样：

child: Material(
            //color: Colors.lightBlueAccent, // for me this was working.
            child: Container(
              // Its important to wrap a ListTile with a sized widget
              height: 300.0,
              width: MediaQuery.of(context).size.width,
              color: Colors.blueGrey,
              child: Column(
                mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                crossAxisAlignment: CrossAxisAlignment.start,
                children: <Widget>[
                  ListTile(
                    title: Image.network('https://telegra.ph/file/fcae4efdaeb34e640ef1f.png'),
                    subtitle: Text(
                      'This is working',
                      style: TextStyle(color: Colors.white),
                    ),
                  ),
                ],
              ),
            ),
          ),

    import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatelessWidget {
  MyHomePage({Key key, this.title}) : super(key: key);
  final String title;

  @override
  Widget build(BuildContext context) {
    {
      return Scaffold(
        body: Container(
          width: MediaQuery.of(context).size.width,
          height: MediaQuery.of(context).size.height,
          color: Colors.amber,
          child: Center(
            child: Material(
              //color: Colors.lightBlueAccent, // for me this was working.
              child: Container(
                // Its important to wrap a ListTile with a sized widget
                height: 300.0,
                width: MediaQuery.of(context).size.width,
                color: Colors.blueGrey,
                child: Column(
                  mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: <Widget>[
                    ListTile(
                      title: Image.network('https://telegra.ph/file/fcae4efdaeb34e640ef1f.png'),
                      subtitle: Text(
                        'This is working',
                        style: TextStyle(color: Colors.white),
                      ),
                    ),
                  ],
                ),
              ),
            ),
          ),
        ),
      );
    }
  }
}

子项：材质(
//color:Colors.lightBlueAccent，//对我来说这很有效。
子：容器(
//用一个大小合适的小部件包装ListTile很重要
高度：300.0，
宽度：MediaQuery.of（context）.size.width，
颜色：颜色。蓝灰色，
子：列(
mainAxisAlignment:mainAxisAlignment.space，
crossAxisAlignment:crossAxisAlignment.start，
儿童：[
列表砖(
标题：Image.network（'https://telegra.ph/file/fcae4efdaeb34e640ef1f.png'),
字幕：文本(
“这起作用了”，
样式：TextStyle（颜色：Colors.white），
),
),
],
),
),
),


输出：

child: Material(
            //color: Colors.lightBlueAccent, // for me this was working.
            child: Container(
              // Its important to wrap a ListTile with a sized widget
              height: 300.0,
              width: MediaQuery.of(context).size.width,
              color: Colors.blueGrey,
              child: Column(
                mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                crossAxisAlignment: CrossAxisAlignment.start,
                children: <Widget>[
                  ListTile(
                    title: Image.network('https://telegra.ph/file/fcae4efdaeb34e640ef1f.png'),
                    subtitle: Text(
                      'This is working',
                      style: TextStyle(color: Colors.white),
                    ),
                  ),
                ],
              ),
            ),
          ),

    import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatelessWidget {
  MyHomePage({Key key, this.title}) : super(key: key);
  final String title;

  @override
  Widget build(BuildContext context) {
    {
      return Scaffold(
        body: Container(
          width: MediaQuery.of(context).size.width,
          height: MediaQuery.of(context).size.height,
          color: Colors.amber,
          child: Center(
            child: Material(
              //color: Colors.lightBlueAccent, // for me this was working.
              child: Container(
                // Its important to wrap a ListTile with a sized widget
                height: 300.0,
                width: MediaQuery.of(context).size.width,
                color: Colors.blueGrey,
                child: Column(
                  mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: <Widget>[
                    ListTile(
                      title: Image.network('https://telegra.ph/file/fcae4efdaeb34e640ef1f.png'),
                      subtitle: Text(
                        'This is working',
                        style: TextStyle(color: Colors.white),
                      ),
                    ),
                  ],
                ),
              ),
            ),
          ),
        ),
      );
    }
  }
}


整个代码：

child: Material(
            //color: Colors.lightBlueAccent, // for me this was working.
            child: Container(
              // Its important to wrap a ListTile with a sized widget
              height: 300.0,
              width: MediaQuery.of(context).size.width,
              color: Colors.blueGrey,
              child: Column(
                mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                crossAxisAlignment: CrossAxisAlignment.start,
                children: <Widget>[
                  ListTile(
                    title: Image.network('https://telegra.ph/file/fcae4efdaeb34e640ef1f.png'),
                    subtitle: Text(
                      'This is working',
                      style: TextStyle(color: Colors.white),
                    ),
                  ),
                ],
              ),
            ),
          ),

    import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatelessWidget {
  MyHomePage({Key key, this.title}) : super(key: key);
  final String title;

  @override
  Widget build(BuildContext context) {
    {
      return Scaffold(
        body: Container(
          width: MediaQuery.of(context).size.width,
          height: MediaQuery.of(context).size.height,
          color: Colors.amber,
          child: Center(
            child: Material(
              //color: Colors.lightBlueAccent, // for me this was working.
              child: Container(
                // Its important to wrap a ListTile with a sized widget
                height: 300.0,
                width: MediaQuery.of(context).size.width,
                color: Colors.blueGrey,
                child: Column(
                  mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: <Widget>[
                    ListTile(
                      title: Image.network('https://telegra.ph/file/fcae4efdaeb34e640ef1f.png'),
                      subtitle: Text(
                        'This is working',
                        style: TextStyle(color: Colors.white),
                      ),
                    ),
                  ],
                ),
              ),
            ),
          ),
        ),
      );
    }
  }
}

导入“包装：颤振/材料.省道”；
void main（）{
runApp（MyApp（））；
}
类MyApp扩展了无状态小部件{
@凌驾
小部件构建（构建上下文）{
返回材料PP(
标题：“颤振演示”，
主题：主题数据(
主样本：颜色。蓝色，
视觉密度：视觉密度。自适应平台密度，
),
主页：MyHomePage（标题：“颤振演示主页”），
);
}
}
类MyHomePage扩展了无状态小部件{
MyHomePage（{Key，this.title}）：超级（Key:Key）；
最后的字符串标题；
@凌驾
小部件构建（构建上下文）{
{
返回脚手架(
主体：容器(
宽度：MediaQuery.of（context）.size.width，
高度：MediaQuery.of（context）.size.height，
颜色：颜色。琥珀色，
儿童：中心(
儿童：材料(
//color:Colors.lightBlueAccent，//对我来说这很有效。
子：容器(
//用一个大小合适的小部件包装ListTile很重要
高度：300.0，
宽度：MediaQuery.of（context）.size.width，
颜色：颜色。蓝灰色，
子：列(
mainAxisAlignment:mainAxisAlignment.space，
crossAxisAlignment:crossAxisAlignment.start，
儿童：[
列表砖(
标题：Image.network（'https://telegra.ph/file/fcae4efdaeb34e640ef1f.png'),
字幕：文本(
“这起作用了”，
样式：TextStyle（颜色：Colors.white），
),
),
],
),
),
),
),
),
);
}
}
}
始终在您的问题中添加一些代码，这些代码是您为解决所面临的问题而尝试过的，或者是当前的代码