```
return Container(
height: 70,
width: 100,
color: Colors.white,
child: StreamBuilder(
stream: testRef
.snapshots(),
builder: (context, snapshot) {
if (snapshot.connectionState == ConnectionState.waiting) {
return CircularProgressIndicator();
}
var sum = snapshot.data.documents[0] + snapshot.data.documents[0];
return Row(
children: <Widget>[
Padding(
padding: const EdgeInsets.all(15.0),
child: Text(
"Total is : $sum ",
),
),
Text(
" " , )
]);
}));
```
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,
),
],
),
),
],
),
)
])
