Add border to a Container with borderRadius in Flutter

Container(
child: Text(
'This is a Container',
textScaleFactor: 2,
style: TextStyle(color: Colors.black),
),


decoration: BoxDecoration(
borderRadius: BorderRadius.circular(10),
color: Colors.white,
border: Border(
left: BorderSide(
color: Colors.green,
width: 3,
),
),
),
height: 50,
),

This is supposed to show a rounded-edged container with a green left border 3px wide, and the child Text "This is a Container". However, it just shows a rounded-edged container with an invisible child and an invisible left border.

When I take out the borderRadius object, the child Text and the green left border is visible, but introducing it hides the left border and child Text again.

The major problem seems to be the custom left border, because using border: Border.all(width: 0) and borderRadius: BorderRadius.circular(10) makes the edges rounded as needed and also shows the child. But now I cant apply the green left border which is quite important in this particular setup.

So is there something I'm doing wrong, or is this a bug in flutter, or is it just something that is not allowed?

Thank you in advance.

Edit: The image below is the end result. The colors don't matter

This is how it should look

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最佳答案

不可能添加 borderRadius: 和 borderRadius: 同时，您会得到这个错误:

边界半径只能用于统一的边界。

您可以使用 borderRadius: 和 boxShadow: 代替 border: 来实现您想要的效果，如下所示:

boxShadow: [
BoxShadow(color: Colors.green, spreadRadius: 3)
]

您的示例代码如下所示:

Container(
child: Text(
'This is a Container',
textScaleFactor: 2,
style: TextStyle(color: Colors.black),
),
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(10),
color: Colors.white,
boxShadow: [
BoxShadow(color: Colors.green, spreadRadius: 3),
],
),
height: 50,
),

编辑: 要实现您现在提供的示例，您可以这样做:

Container(
padding: EdgeInsets.only(left: 12.0),
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(10.0),
color: Colors.green,
),
height: 50,
child: Container(
decoration: BoxDecoration(
borderRadius: BorderRadius.only(
topRight: Radius.circular(10.0),
bottomRight: Radius.circular(10.0)),
color: Colors.white,
),
child: Text(
'This is a Container',
textScaleFactor: 2,
style: TextStyle(color: Colors.black),
),
),
),

另一个解决办法:

Container(
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(10.0),
color: Colors.white,
),
height: 50,
child: Row(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
Container(
width: 12.0,
decoration: BoxDecoration(
borderRadius: BorderRadius.only(
topLeft: Radius.circular(10.0),
bottomLeft: Radius.circular(10.0)),
color: Colors.green,
),
),
Text(
'This is a Container',
textScaleFactor: 2,
style: TextStyle(color: Colors.black),
)
],
),
),
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我认为受@pablo 的答案启发，一个更简单的方法是只做一个盒子阴影和偏移，但没有任何模糊。

decoration: BoxDecoration(
color: Colors.white,
borderRadius: BorderRadius.vertical(
top: Radius.circular(10),
),
boxShadow: [
// to make elevation
BoxShadow(
color: Colors.black45,
offset: Offset(2, 2),
blurRadius: 4,
),
// to make the coloured border
BoxShadow(
color: Colors.blue,
offset: Offset(0, 4),
),
],
),

The decoration above will give us an elevated box which has a blue border in the bottom. 这种方法的另一个好处是，您可以将它与

borderRadius: BorderRadius.circular(num)

Which means you can have a container with all rounded sides + a colored border.

请注意，彩色边框位于原始阴影下。这样做是为了防止立面颜色使边框变暗。

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有一个答案 给你

Container(
decoration: BoxDecoration(
border: Border.all(
color: Color(0xFFF05A22),
style: BorderStyle.solid,
width: 1.0,
),
color: Colors.transparent,
borderRadius: BorderRadius.circular(30.0),
),
),
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如果你想达到 borderRadius你也可以使用 PhysicalModel，但你必须提供颜色。您还可以为小部件创建一个阴影。

PhysicalModel(
color: Colors.red,
elevation: 5,
shadowColor: Colors.blue,
borderRadius: BorderRadius.circular(20),
child: SizedBox(width: 75, height: 75),
)
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这可能太晚了，但对其他人也可能有用。

您可以将 Container包装在 ClipRRect中，给 ClipRect 半径，并给容器设置边框！

例如:

ClipRRect(
borderRadius: const BorderRadius.all(Radius.circular(16.0)),
child: Container(
height: 100,
width: double.maxFinite,
padding: const EdgeInsets.all(16.0),
decoration: BoxDecoration(
border: Border(
left: BorderSide(width: 8.0, color: Colors.green),
),
),
),
),

这将完成您上次发布的 UI。

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我存档做了一个 Inkwell (模拟一个按钮)循环，里面有一个图标:

InkWell(
onTap: (){},
child: Container(
width: 50,
height: 50,
decoration: ShapeDecoration(
shape: CircleBorder(), //here we set the circular figure
color: Colors.red
),
child: Center(
child: Icon(
Icons.email,
size: 30,
color: Colors.white,
)
),
)
)

链接结果示例: https://images.vexels.com/media/users/3/140138/isolated/preview/88e50689fa3280c748d000aaf0bad480-icono-de-ronda-de-correo-electronico-1.png

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////Hope this will work for you,Thanks
import 'package:flutter/material.dart';
class System extends StatefulWidget {
const System({Key? key}) : super(key: key);


@override
_SystemState createState() => _SystemState();
}


class _SystemState extends State<System> {
@override
Widget build(BuildContext context) {
return Scaffold(
body:Padding(
padding: const EdgeInsets.only(top:80.0),
child: Column(
children: [
ClipRRect(
borderRadius: const BorderRadius.all(Radius.circular(16.0)),
child: Padding(
padding: const EdgeInsets.all(15.0),
child: ClipRRect(
borderRadius: BorderRadius.circular(10),
child: Container(
height: 100,
width: double.maxFinite,
padding: const EdgeInsets.all(16.0),
decoration: const BoxDecoration(
color: Color(0xffF6EBEC),
border: Border(
bottom: BorderSide(width: 8.0, color: Color(0xffA24949)),
),
),
child: Row(
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisAlignment: MainAxisAlignment.center,
children: [
const CircleAvatar(
backgroundColor: Color(0xffA24949),
child: Icon(Icons.close,
color: Color(0xffF6EBEC), size: 40),
),
const SizedBox(width: 10),
Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.start,
children: const [
Text("Invalid",
style: TextStyle(color: Color(0xffA24949), fontSize: 18)),
SizedBox(
width: 243,
child: Text("Details do not match the issuer records",overflow: TextOverflow.ellipsis,maxLines: 1,))
])


],
),
),
),
),
),
SizedBox(height: 20,),
ClipRRect(
borderRadius: const BorderRadius.all(Radius.circular(16.0)),
child: Padding(
padding: const EdgeInsets.all(15.0),
child: ClipRRect(
borderRadius: BorderRadius.circular(10),
child: Container(
height: 100,
width: double.maxFinite,
padding: const EdgeInsets.all(16.0),
decoration: const BoxDecoration(
color: Color(0xFFE9F6EB),
border: Border(
bottom: BorderSide(width: 8.0, color: Color(0xFF69A258),),
),
),
child: Row(
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisAlignment: MainAxisAlignment.center,
children: [
const CircleAvatar(
backgroundColor: Color(0xFF69A258),
child: Icon(Icons.check_rounded,
color: Color(0xFFE9F6EB), size: 40),
),
const SizedBox(width: 15),
Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.start,
children: const [
Text("Valid",
style: TextStyle(color: Color(0xFF69A258), fontSize: 18)),
Text("Document successfully validated.")
])
]),
),
),
),
),
],
),
),
);
}
}

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