The code you are looking for is below
SizedBox(
height: 100,
child: Row(
children: [
Container(width: 100,color: Colors.blue),
Expanded(
child: Column(
children: [
Container(height: 30,color: Colors.green,),
Expanded(
child: Row(
children: [
Container(width: 100,color: Colors.purple),
Expanded(child:
Container(color: Colors.pinkAccent),)
],
),
),
],
),
)
],
),
),
child: Container(
alignment: Alignment.center,// use aligment
child: Image.asset(
'assets/images/call.png',
height: 45,
width: 45,
fit: BoxFit.cover,
),
),
**Use this if you want with border**
Center(
child: Container(
margin: EdgeInsets.only(top: 75),
width: 120,
height: 120,
alignment: Alignment.center,
child: Image.asset(
"assets/images/call.png",
fit: BoxFit.cover,
height: 45,
width: 45,
),
decoration: new BoxDecoration(
color: Colors.white,
borderRadius: new BorderRadius.all(new Radius.circular(120)),
border: new Border.all(
color: Colors.blue,
width: 4.0,
),
),
),
)
