how to position an image on top of another "card"? - flutter

Question

This is my first time here
I face a little problem which is the image that I wanted to put on top of the card do not work properly, the rest of it didn't display
I used (stack & positioned)
What should I do ??
Note : I'm beginner 👀
this is the code :
SizedBox(
width: 500,
height: 100,
child: Container(
child: Padding(
padding:
EdgeInsets.symmetric(horizontal: 10, vertical: 10),
child: Card(
color: Colors.grey.shade400,
child: Stack(children: [
Positioned(
bottom: 40,
left: 150,
child: CircleAvatar(
child: ClipOval(
child: Image.asset(
"assets/images/guy.jpg",
width: 100,
height: 100,
fit: BoxFit.cover,
),
),
backgroundColor: Colors.transparent,
radius: 50,
),
),
]),
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(15),
),
elevation: 10),
),
)),
and this is the the output :
enter image description here
and i wanted to be like this : enter image description here

Answer 1

if you want like that, then you need to put SizedBox and add size (height and or width) on it it acts as invicible widget to put space on it.
Stack
--Positioned (top 0)
----Column
------SizedBox (add height here around 50x50 px)
------Image (100x100 px)
--Card

Answer 2

Try below code hope its helpful to you. refer for thar Stack class here
Stack(
alignment: Alignment.topCenter,
children: <Widget>[
Padding(
padding: EdgeInsets.only(top: 10),
child: Container(
height: 320,
width: 420,
margin: EdgeInsets.all(16.0),
child: Card(
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(20),
),
color: Colors.white,
child: Padding(
padding: const EdgeInsets.all(18.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
mainAxisSize: MainAxisSize.min,
children: [
Text(
'Your Other Widgets',
),
],
),
),
),
),
),
Container(
width: 50,
height: 50,
decoration: ShapeDecoration(
shape: CircleBorder(),
color: Colors.transparent,
),
child: Padding(
padding: EdgeInsets.all(1),
child: DecoratedBox(
decoration: ShapeDecoration(
shape: CircleBorder(),
image: DecorationImage(
fit: BoxFit.cover,
image: AssetImage(
'assets/images/1.png',
),
),
),
),
),
)
],
),
Your Result screen->