Flutter container width inside MaterialButton - flutter

Question

I am trying for hours to set my container width to its parent, which is a MaterialButton. I want the container to fill the entire width of the MaterialButton.
I tried to set the container width to "double.infitiy" or to "MediaQuery.of(context).size.width". Also played with "Expanded" etc. None of it worked. Not sure what I am doing wrong, thanks.
#override
Widget build(BuildContext context) {
return Material(
**child: MaterialButton(
minWidth: MediaQuery.of(context).size.width,
onPressed: onPressed,
child: Container(
width: double.infinity,**
margin: EdgeInsets.all(8.0),
padding: EdgeInsets.all(8.0),
decoration: BoxDecoration(
color: Colors.greenAccent,
borderRadius: BorderRadius.circular(10.0)),
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Text(text),
SizedBox(
height: 8.0,
),
SvgPicture.asset(
'images/medaillen.svg',
width: 80,
),
SizedBox(
height: 15.0,
),
Text(
textTopThree,
maxLines: 3,
),
],
),
),
),
);

Answer 1

I recommend you to replace the Material Button with InkWell, you can wrap any widget and get the onTap.
This should work:
InkWell(
onTap: () {},
child: Container(
width: double.infinity,
padding: EdgeInsets.all(8.0),
decoration: BoxDecoration(
color: Colors.greenAccent,
borderRadius: BorderRadius.circular(10.0),
),
child: Column(
children: [
Text('Button Text'),
SizedBox(
height: 8.0,
),
Image.asset(
'images/medaillen.svg',
width: 80,
),
SizedBox(
height: 15.0,
),
Text(
'textTopThree',
maxLines: 3,
),
],
),
),
),
If for some reason you need to use MaterialButton, then you should delete the Container and use the properties of the Material Button, like this:
MaterialButton(
onPressed: () {},
color: Colors.greenAccent,
minWidth: double.infinity,
padding: EdgeInsets.all(8.0),
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(18.0),
),
child: Column(
children: [
SizedBox(
height: 8.0,
),
Text('Button Text'),
SizedBox(
height: 8.0,
),
Image.asset(
'images/medaillen.svg',
width: 80,
),
SizedBox(
height: 15.0,
),
Text(
'textTopThree',
maxLines: 3,
),
SizedBox(
height: 8.0,
),
],
),
),