flutter: how to customize cuperinoAlertDialog style? - flutter

Question

I'm working with flutter. I want to make a CupertinoAlertDialog(iOS style is required). My problem is UI designers require the background color of the alert dialog should be #F0F0F0. But I can only adjust its theme into dark or light(e.g. following picture). The code I completed is placed below.
showCupertinoDialog(
context: context,
builder: (BuildContext context){
return Theme(
data: ThemeData.dark(),
child: CupertinoAlertDialog(
title: Text('Title'),
content: Text('Some message here'),
actions: <Widget>[
FlatButton(
onPressed: () {
Navigator.of(context).pop();
},
child: Text('Cancle'),
),
FlatButton(
onPressed: () {
Navigator.of(context).pop();
},
child: Text('OK'),
),
],
),
);
}
);
Is that possible? Thanks for any advice.

Answer 1

If I recall correctly, the background color for CupertinoAlertDialog is hardcoded. However, you can create a custom dialog that can change the background color of it as well as the functions of the buttons.
You need to create a type Dialog for the showDialog function instead of showCupertinoDialog:
Dialog customDialog = Dialog(
backgroundColor: Color(0xfff0f0f0), // your color
shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(40)), // change 40 to your desired radius
child: CustomAlertDialog(),
);
I also created a stateless widget called CustomAlertDialog, but if you don't want to, you can replace the CustomAlertDialog() with its content.
class CustomAlertDialog extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Container(
height: 150,
child: Column(
children: [
Expanded(
flex: 2,
child: Container(
decoration: BoxDecoration(
border: Border(
bottom: BorderSide(color: Colors.grey, width: 1),
),
),
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: [
Container(
child: Center(
child: Text(
"Title",
style: TextStyle(
fontWeight: FontWeight.bold, fontSize: 20),
),
),
),
Container(
child: Center(
child: Text("Some message here"),
),
),
],
),
),
),
Expanded(
flex: 1,
child: Row(
children: [
Expanded(
flex: 1,
child: GestureDetector(
child: Container(
decoration: BoxDecoration(
border: Border(
right: BorderSide(color: Colors.grey, width: 1),
),
),
child: Center(
child: Text("Cancel"),
),
),
onTap: () {
Navigator.of(context).pop(); // replace with your own functions
},
),
),
Expanded(
flex: 1,
child: GestureDetector(
child: Container(
child: Center(
child: Text("OK"),
),
),
onTap: () {
Navigator.of(context).pop(); // replace with your own functions
},
),
),
],
),
),
],
),
);
}
}
Lastly, replace your whole showCupertinoDialog with this showDialog function:
showDialog(
barrierDismissible: true, // set false if you dont want the dialog to be dismissed when user taps anywhere [![enter image description here][1]][1]outside of the alert
context: context,
builder: (context) {
return customDialog;
},
);
Result: https://i.stack.imgur.com/cV13A.png