add toast

lib/utils/toast_utils.dart

+import 'package:flutter/material.dart';
+import 'package:fluttertoast/fluttertoast.dart';
+
+class QmToast {
+  static toast(String msg) {
+    if (msg.isNotEmpty) {
+      Fluttertoast.showToast(
+          msg: msg,
+          toastLength: Toast.LENGTH_SHORT,
+          gravity: ToastGravity.CENTER,
+          timeInSecForIosWeb: 2,
+          backgroundColor: Colors.black.withOpacity(0.6),
+          textColor: Colors.white.withOpacity(0.9),
+          fontSize: 16.0);
+    }
+  }
+}