How to make flutter card auto adjust its height depend on content

问题

In the project im using image and text inside the flutter card, but the card return a fixed height. and then i also tried just using a card with an empty value, but it still return a fixed height. what should i do to make the height of card auto adjust with content.

    @override
    Widget build(BuildContext context) {
    final title = 'Food Recipes';
    return MaterialApp(
      title: title,
      home: Scaffold(
        appBar: AppBar(
          title: Text(title),
        ),
        body: GridView.builder(
            itemCount: _listViewData.length,
            gridDelegate:
                SliverGridDelegateWithFixedCrossAxisCount(crossAxisCount: 2),
            itemBuilder: (context, index) {
              return Card(
                margin: const EdgeInsets.all(10.0),
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    AspectRatio(
                      aspectRatio: 18.0 / 13.0,
                      child: Image.network(
                        _listViewDataImage[index],
                        fit: BoxFit.fill,
                      ),
                    ),
                    Padding(
                      padding: EdgeInsets.fromLTRB(16.0, 12.0, 16.0, 8.0),
                      child: Column(
                        crossAxisAlignment: CrossAxisAlignment.start,
                        children: [
                          Text(
                            _listViewData[index],
                            textAlign: TextAlign.center,
                          ),
                        ],
                      ),
                    ),
                  ],
                ),
              );
            }),
      ),
    );
  }

回答1:

The problem comes from SliverGridDelegateWithFixedCrossAxisCount:

Creates grid layouts with a fixed number of tiles in the cross axis
This delegate creates grids with equally sized and spaced tiles.

I recommend you to use flutter_staggered_grid_view: and to give up to AspectRatio widget. More about tiles here.

body: StaggeredGridView.countBuilder(
   crossAxisCount: 2,
   itemCount: 6,
   itemBuilder: (BuildContext context, int index) => 
     Card(
       margin: const EdgeInsets.all(10.0),
       child: Container(
         child: Column(
           crossAxisAlignment: CrossAxisAlignment.start,
           children: [
            Image.network('https://upload.wikimedia.org/wikipedia/commons/6/66/An_up-close_picture_of_a_curious_male_domestic_shorthair_tabby_cat.jpg',
              fit: BoxFit.fill,
            ),
            Padding(
              padding: EdgeInsets.fromLTRB(16.0, 12.0, 16.0, 8.0),
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Text("Cat",textAlign: TextAlign.center),
                ],
            ),
         )],
       ),
     )
   ),
   staggeredTileBuilder: (int index) =>
     StaggeredTile.fit(1),
)

回答2:

You want to wrap your card in Column because inner Column take full height

 Column(children: <Widget>[
      Card(
        margin: const EdgeInsets.all(10.0),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            AspectRatio(
              aspectRatio: 18.0 / 13.0,
              child: Image.network(
               "https://i.stack.imgur.com/mDkkT.png",
                fit: BoxFit.fill,
              ),
            ),
            Padding(
              padding: EdgeInsets.fromLTRB(16.0, 12.0, 16.0, 8.0),
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Text(
                    "Demo",
                    textAlign: TextAlign.center,
                  ),
                ],
              ),
            ),
          ],
        ),
      )
])

来源：https://stackoverflow.com/questions/58213527/how-to-make-flutter-card-auto-adjust-its-height-depend-on-content