自定义卡片形状 Flutter SDK

Question

I just started learning Flutter and I have developed an app with GridView. GridView items are Card. Default card shape is Rectangle with a radius of 4.

I know there is shape property for Card Widget and it takes ShapeBorder class. But I am unable to find how to use ShapeBorder class and customize my cards in GridView.

Thanks in Advance.

Answer 1

You can use itthis way

Card(
  shape: RoundedRectangleBorder(
    borderRadius: BorderRadius.circular(15.0),
  ),
  child: Text(
    'Card with circular border',
    textScaleFactor: 1.2,
  ),
),
Card(
  shape: BeveledRectangleBorder(
    borderRadius: BorderRadius.circular(10.0),
  ),
  child: Text(
    'Card with Beveled border',
    textScaleFactor: 1.2,
  ),
),
Card(
  shape: StadiumBorder(
  side: BorderSide(
    color: Colors.black,
    width: 2.0,
  ),
),
  child: Text(
    'Card with Beveled border',
    textScaleFactor: 1.2,
  ),
),

Answer 2

When Card I always use RoundedRectangleBorder.

Card(
  color: Colors.grey[900],
  shape: RoundedRectangleBorder(
    side: BorderSide(color: Colors.white70, width: 1),
    borderRadius: BorderRadius.circular(10),
  ),
  margin: EdgeInsets.all(20.0),
  child: Container(
    child: Column(
        children: <Widget>[
        ListTile(
            title: Text(
            'example',
            style: TextStyle(fontSize: 18, color: Colors.white),
            ),
        ),
        ],
    ),
  ),
),

Answer 3

You can also customize the card theme globally with ThemeData.cardTheme :

MaterialApp(
  title: 'savvy',
  theme: ThemeData(
    cardTheme: CardTheme(
      shape: RoundedRectangleBorder(
        borderRadius: const BorderRadius.all(
          Radius.circular(8.0),
        ),
      ),
    ),
    // ...

Answer 4

An Alternative Solution to the above

Card(
  shape: RoundedRectangleBorder(
     borderRadius: BorderRadius.only(topLeft: Radius.circular(20), topRight: Radius.circular(20))),
  color: Colors.white,
  child: ...
)

You can use BorderRadius.only() to customize the corners you wish to manage.

Answer 5

A Better way to customise Card Radius ( Also other options ) is to set theme for Card globally. So that you can use same style for Card througout the entire app. You can use this method for many other widget also.

For Card Theme you can use ThemeData.cardTheme

MaterialApp(
 title: 'MySampleApp',
 theme: ThemeData(
   cardTheme: CardTheme(
     shape: RoundedRectangleBorder(
       borderRadius: BorderRadius.all(
         Radius.circular(16.0),
       ),
     ),
   ),
// ............
// ............