如何更改Popup MenuButton 项目符号window 的背景颜色？

Question

我想更改弹出菜单按钮的背景颜色window。我应该怎么办？我希望我能得到你的帮助。谢谢you.When我改了容器的颜色，有些边角改不了颜色

 new IconButton(
            icon: new Icon(
              Icons.search,
              color: Colors.white,
            ),
            onPressed: () {},
          ),
          new PopupMenuButton(
            offset: const Offset(0.0, 60.0),
            icon: new Icon(Icons.add, color: Colors.white),
            itemBuilder: (BuildContext context) => <PopupMenuItem<String>>[
                  new PopupMenuItem<String>(
                      value: '选项一的值',
                      child: new Container(
                          color: Colors.red,
                          child: new Column(
                            children: <Widget>[
                              new Row(
                                children: <Widget>[
                                  new Image.asset(defaultAvatar,
                                      width: 30.0, height: 30.0),
                                  new Text('发起群聊')
                                ],
                              ),
                            ],
                          ))),
                  new PopupMenuItem<String>(
                      value: '选项一的值',
                      child: new Container(
                          child: new Column(
                        children: <Widget>[
                          new Row(
                            children: <Widget>[
                              new Image.asset(defaultAvatar,
                                  width: 30.0, height: 30.0),
                              new Text('添加朋友')
                            ],
                          ),
                        ],
                      ))),

Answer 1

该背景颜色基于 Theme ，因此您可以更改 Theme 内包裹 PopMenuButton 的颜色并更改 cardColor.

          Theme(
                data: Theme.of(context).copyWith(
                  cardColor: Colors.red,
                ),
                child: new PopupMenuButton(
                       ...

Answer 2

有点丑，但是嘿：

PopupMenuButton<String>(
   onSelected: (selected) {},
   icon: Icon(Icons.more_vert, color: Colors.white,),
   itemBuilder: (BuildContext context) {
      ...
   },
),

Answer 3

您可以使用 PopupMenuButton( color: Colors.red, ...) 更改背景颜色，而无需将其包装在新主题中。

Answer 4

Center(
      child: Theme(
        data: Theme.of(context).copyWith(
          cardColor: Colors.red,
        ),
        child: PopupMenuButton(
          child: Text("Show Popup Menu"),
          itemBuilder: (context) => [
                PopupMenuItem(
                  child: Text("InduceSmile.com"),
                ),
                PopupMenuItem(
                  child: Text("Flutter.io"),
                ),
                PopupMenuItem(
                  child: Text("Google.com"),
                ),
              ],
        ),
      ),

这工作正常。

如何更改Popup MenuButton 项目符号window 的背景颜色？

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flutter-layout