mobile-flutter/covas_mobile/lib/classes/alert.dart

import 'package:flutter/material.dart';

mixin ShowAlertDialog {
  void showAlertDialog(BuildContext context, String title, String text) {
    // Create AlertDialog
    AlertDialog dialog = AlertDialog(
      title: Text(title),
      content: Text(text),
      actions: [
        ElevatedButton(
            child: Text("OK"),
            style: ElevatedButton.styleFrom(
                padding: EdgeInsets.symmetric(horizontal: 50, vertical: 20),
                textStyle:
                    TextStyle(fontSize: 15, fontWeight: FontWeight.normal)),
            onPressed: () {
              Navigator.of(context).pop("Yes, Of course!"); // Return value
            }),
      ],
    );

    // Call showDialog function to show dialog.
    Future futureValue = showDialog(
        context: context,
        builder: (BuildContext context) {
          return dialog;
        });
  }
}