如何在Flutter中为PopupMenu添加圆角边框？

Question

有什么方法可以让我创建带有圆形边框的自定义弹出窗口？这是我目前的代码和设计:

                child: Container(
                 child: PopupMenuButton(
                   onSelected: _savedLocationOptionSelected,
                   itemBuilder: (context) {
                     return SavedLocationOptions.choises.map((value) {
                       return PopupMenuItem<String>(
                         value: value,
                         child: Text(value),
                       );
                     }).toList();
                   },
                   icon: Icon(
                     Icons.more_vert,
                     color: Colors.grey[300],
                   ),
                 ),
               ),

Answer 1

除了@Taz给出的答案之外，您还可以使用主题在一个地方为每个弹出窗口设置圆角:

MaterialApp(
  // ....
  theme: ThemeData(
  // ....
  popupMenuTheme: PopupMenuThemeData(
    shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(8))
  )
)

Answer 2

另一种简单的方法是：

shape: ContinuousRectangleBorder(
         borderRadius: BorderRadius.circular(30),
       ),

Answer 3

您只需在PopupMenuButton
添加这样的内容

shape: RoundedRectangleBorder(
          borderRadius: BorderRadius.all(
               Radius.circular(20.0),
          ),
),

例子

   PopupMenuButton(
      child: Text("Show Popup Menu"),
      shape: RoundedRectangleBorder(
          borderRadius: BorderRadius.all(Radius.circular(15.0))
      ),
      itemBuilder: (context) => [
        PopupMenuItem(
          child: Text("pub.dev"),
        ),
        PopupMenuItem(
          child: Text("Flutter"),
        ),
        PopupMenuItem(
          child: Text("Google.com"),
        ),
        PopupMenuItem(
          child: Text("https://blogdeveloperspot.blogspot.com"),
        ),
      ],
    ),