Issue with AlertDialog being triggered by a button - flutter

Question

I am trying to have an alert dialogue appear after I click a button but clicking the button doesn't do anything for some reason. I have it in the onPressed so I'm not sure why it isn't triggering. Also if I get this working will it work with Apple devices as well since this is a materials widget.
class AddButton extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Scaffold(
body: Container(
alignment: Alignment.bottomCenter, // align the row
child: Row(
children: <Widget>[
Expanded(
child: RaisedButton(
onPressed: (){
AlertDialog(
title: Text("Test"),
content: Text("This is a test..."),
elevation: 24.0,
);
},
color: Colors.blue,
splashColor: Colors.white,
elevation: 2,
)
)
],
)
)
);
}
}

Answer 1

You have to use the showDialog method to make a dialog appear. Inside the builder callback, you then define the type of dialog you want ex. AlertDialog.
Example (from https://medium.com/#nils.backe/flutter-alert-dialogs-9b0bb9b01d28):
//your method
void _showDialog(BuildContext context) {
// flutter defined function
showDialog(
context: context,
builder: (BuildContext context) {
// return object of type Dialog
return AlertDialog(
title: new Text("Alert Dialog title"),
content: new Text("Alert Dialog body"),
actions: <Widget>[
// usually buttons at the bottom of the dialog
new FlatButton(
child: new Text("Close"),
onPressed: () {
Navigator.of(context).pop();
},
),
],
);
},
);
}
Your new code:
onPressed: () => _showDialog(context); // only pass context if you're in a stateless widget
Regarding Apple devices, instead of AlertDialog, you can use CupertinoAlertDialog if you're exclusively developing for iOS.