this is the part that confuses me:

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return const MaterialApp(
      title: 'Startup Name Generator',
      actions: <Widget>[
        IconButton(
          icon: const Icon(Icons.shopping_cart),
          tooltip: 'Open shopping cart',
          onPressed: () {
            // handle the press
          },
        ),
      ],
      home: RandomWords(),
    );
  }
}

I'm following the tutorial provided by google themselves, but it doesn't work:

https://codelabs.developers.google.com/codelabs/first-flutter-app-pt2

I get this error:

The argument type 'List<Widget>' can't be assigned to the parameter type 'Map<Type, Action<Intent>>?'. dart(argument_type_not_assignable)

but the docs state that the actions property is a List<Widget>, so I have no clue what I did wrong

CodePudding user response：

You're working with the wrong parent Widget. The actions of the MaterialApp is not what you're looking for.

Go to your RandomWords Widget, make sure it builds a Scaffold, add an appBar to your Scaffold and set the actions of this AppBar.

You want something like this.

import 'package:flutter/material.dart';

class Test extends StatelessWidget {
  const Test({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Test appbar'),
        actions: [
          IconButton(
            icon: const Icon(Icons.shopping_cart),
            tooltip: 'Open shopping cart',
            onPressed: () {
              // handle the press
            },
          ),
        ],
      ),
    );
  }
}