Remove grey background for flutter alert dialog - flutter

Question

I have a CupertinoAlertDialog and AlertDialog in my Flutter app. every time the dialog pops up, everything behind it becomes darker. I would like to remove the background. how do I do that?
CupertinoDialogAction(
child: Text('Delete',
style: TextStyle(color: Colors.red),
),
onPressed: () async {
await CommentActivity.delete(postData[index]['id'])
.then((response) {
if (response) {
setState(() {
postData.removeAt(index);
createPageActivity();
renderPageActivity();
});
Navigator.of(context).pop();
}
});
}
)
],
)

Answer 1

An alternative solution that partially solves the problem is using an almost transparent color for the barrier:
showDialog<void>(
barrierColor: Color(0x01000000),
)

Answer 2

Just launch the dialog with de navigator instead of using the showDialog() and use a PageRouteBuilder
Navigator.of(context).push(
PageRouteBuilder(
pageBuilder: (context, _, __) => AlertDialog(),
opaque: false),
);

Answer 3

I think you're talking about the black fader in the background of the dialog...
Is part of the material/cupertino implementations, in Material has a fixed value of Colors.black54.
You will have to copy the showDialog() code, and modify it.
Demo:
// common Dialog widget shown in both implementation.
Widget buildDialog(BuildContext context) {
return CupertinoDialogAction(
child: Text(
'Delete',
style: TextStyle(color: Colors.red),
),
onPressed: () async {
Navigator.of(context).pop();
},
);
}
void openDialog(BuildContext context) {
// open custom dialog.
openCustomDialog(context);
// open default dialog.
// openFlutterDialog(context);
}
// regular Fluter showDialog()
void openFlutterDialog(BuildContext context) {
showDialog(
context: context,
builder: (ctx) {
return buildDialog(ctx);
},
);
}
void openCustomDialog(BuildContext context) {
showCustomDialog(
context: context,
builder: (ctx) {
return buildDialog(ctx);
},
);
}
// custom implementation of showDialog()...
Future<T> showCustomDialog<T>({
#required BuildContext context,
bool barrierDismissible = true,
WidgetBuilder builder,
}) {
assert(debugCheckHasMaterialLocalizations(context));
final ThemeData theme = Theme.of(context, shadowThemeOnly: true);
return showGeneralDialog(
context: context,
pageBuilder: (BuildContext buildContext, Animation<double> animation,
Animation<double> secondaryAnimation) {
final Widget pageChild = Builder(builder: builder);
return SafeArea(
child: Builder(builder: (BuildContext context) {
return theme != null
? Theme(data: theme, child: pageChild)
: pageChild;
}),
);
},
barrierDismissible: barrierDismissible,
barrierLabel: MaterialLocalizations.of(context).modalBarrierDismissLabel,
// KEY PART TO MODIFY, Flutter doesn't allow a transparent Color,
// values under opacity .01 are considered transparent and will throw an error.
// But this value is transparent enough.
barrierColor: Colors.black.withOpacity(0.01),
// you can modify the default FadeTransition duration here.
transitionDuration: const Duration(milliseconds: 2000),
);
}
Is this what you were looking for?

Answer 4

Simple solution with barrierColor property in showDialog method which I set white color with opacity value zero and barrier shadow is vanished
AlertDialog alert = AlertDialog(
backgroundColor: Colors.transparent,
elevation: 0,
content: new Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Loader(),
],
),
);
showDialog(
barrierColor: Colors.white.withOpacity(0),
barrierDismissible: false,
context: context,
builder: (BuildContext context) {
return WillPopScope(
onWillPop: (){},
child: alert);
},
);