Flutter alertdialog

AlertDialog(
          title: const Text('AlertDialog Title'),
          content: const Text('this is a demo alert diolog'),
          actions: <Widget>[
            TextButton(
              child: const Text('Approve'),
              onPressed: () { 
              	Navigator.of(context).pop();
              },
            ),
          ],
        );

Alertdialog flutter

showAlertDialog(BuildContext context) {

  // set up the button
  Widget okButton = FlatButton(
    child: Text("OK"),
    onPressed: () { },
  );

  // set up the AlertDialog
  AlertDialog alert = AlertDialog(
    title: Text("My title"),
    content: Text("This is my message."),
    actions: [
      okButton,
    ],
  );

  // show the dialog
  showDialog(
    context: context,
    builder: (BuildContext context) {
      return alert;
    },
  );
}

Source: stackoverflow.com

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