How to make a small rounded rectangle in Flutter - dart

Question

The red rectangle center of my widget is too big and is not responsive to width and height arguments.
I have updated flutter, and android studio. I started with a container in the shape of a circle then, I used a flatbutton and gave it a shape. but when it becomes the rectangle it is the same size as the circle it resizes in. _isRecord is a boolean that is toggled when the button is pressed.
return Container(
width: 80.0,
height: 80.0,
child: Container(
child: FlatButton(
onPressed: _press,
),
decoration: new BoxDecoration(
color: Colors.red,
shape: _isRecording ? BoxShape.rectangle : BoxShape.circle,
borderRadius: _isRecording ? BorderRadius.all(Radius.circular(8.0)) : null,
),
),
decoration: new BoxDecoration(
color: Colors.black,
shape: BoxShape.circle,
border: Border.all(width: 5.0, color: Colors.white),
),
);
It should look and function like the Voice Memos' record button. It should be a white circle stroke with a red center that when pressed becomes a smaller, rounded rectangle.

Answer 1

You can use your Widget inside Padding
exam:
InkWell(
splashColor: Colors.transparent,
highlightColor: Colors.transparent,
onTap: () {
setState(() {
_isRecording = !_isRecording;
});
},
child: DecoratedBox(
decoration: BoxDecoration(
shape: BoxShape.circle,
border: Border.all(width: 5.0, color: Colors.white),
),
child: Padding(
padding: EdgeInsets.all(32.0),
child: Container(
width: 40.0,
height: 40.0,
child: Container(
decoration: new BoxDecoration(
color: Colors.red,
shape:
_isRecording ? BoxShape.rectangle : BoxShape.circle,
borderRadius: _isRecording
? BorderRadius.all(Radius.circular(8.0))
: null,
),
),
),
),
),
)