I want to make such a design, but I could not design the shopping cart icon in this format, how can I do it?

    import 'package:flutter/material.dart';

void main() {
  runApp( MyApp());
}

class MyApp extends StatelessWidget {

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,

      home: Scaffold(
        body: Container(),
        bottomNavigationBar: BottomNavigationBar(
          items: [
            BottomNavigationBarItem(
                icon: Icon(Icons.shopping_cart ,), label:'',
            backgroundColor: Colors.red,
              
            ),
            BottomNavigationBarItem(
                icon: Icon(Icons.shopping_cart), label:''),

          ],

        ),
      ),
    );
  }
}

This is the code I tried to do, I couldn't format the basket icon as shown in the figma design image

CodePudding user response：

1. Create and empty text with widget option list (_widgetOptions)
2. Create a BottomNavigationBarItem with empty label and in the icon widget, place container with BoxShape.circle decoration and use a custom icon of container child
3. Use selected and unselected item color property
4. In the _onItemTapped set a condition for the middle selection icon

See the full codes

import 'package:flutter/material.dart';

void main() => runApp(const MyApp());

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  static const String _title = 'Flutter Code Sample';

  @override
  Widget build(BuildContext context) {
    return const MaterialApp(
      title: _title,
      home: MyStatefulWidget(),
    );
  }
}

class MyStatefulWidget extends StatefulWidget {
  const MyStatefulWidget({super.key});

  @override
  State<MyStatefulWidget> createState() => _MyStatefulWidgetState();
}

class _MyStatefulWidgetState extends State<MyStatefulWidget> {
  int _selectedIndex = 0;
  
  static const TextStyle optionStyle = TextStyle(
    fontSize: 30,
    fontWeight: FontWeight.bold,
  );

  static const List<Widget> _widgetOptions = <Widget>[
    Text(
      'Index 0: Home',
      style: optionStyle,
    ),
    Text(
      'Index 1: Business',
      style: optionStyle,
    ),
    Text(
      '',
    ),
    Text(
      'Index 3: School',
      style: optionStyle,
    ),
    Text(
      'Index 4: Settings',
      style: optionStyle,
    ),
  ];

  void _onItemTapped(int index) {
    if (index != 2) {
      setState(() {
        _selectedIndex = index;
      });
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('BottomNavigationBar Sample'),
      ),
      body: Center(
        child: _widgetOptions.elementAt(_selectedIndex),
      ),
      bottomNavigationBar: BottomNavigationBar(
        items: <BottomNavigationBarItem>[
          const BottomNavigationBarItem(
            icon: Icon(Icons.home),
            label: 'Home',
          ),
          const BottomNavigationBarItem(
            icon: Icon(Icons.business),
            label: 'Business',
          ),
          BottomNavigationBarItem(
            icon: Container(
              height: 65,
              width: 65,
              decoration: const BoxDecoration(
                shape: BoxShape.circle,
                color: Colors.blue,
              ),
              child: const Icon(
                Icons.shopping_cart,
                color: Colors.white,
              ),
            ),
            label: '',
          ),
          const BottomNavigationBarItem(
            icon: Icon(Icons.school),
            label: 'School',
          ),
          const BottomNavigationBarItem(
            icon: Icon(Icons.settings),
            label: 'Settings',
          ),
        ],
        currentIndex: _selectedIndex,
        selectedItemColor: Colors.blue[800],
        unselectedItemColor: Colors.black,
        onTap: _onItemTapped,
      ),
    );
  }
}

CodePudding user response：

I modified your code for the first BottomNavigationBarItem so it has red circular background:

BottomNavigationBarItem(
    icon: Container(
        height: 50,
        width: 50,
        decoration: BoxDecoration(
            shape: BoxShape.circle,
            color: Colors.red,
        ),
        child: Icon(
            Icons.shopping_cart,
            color: Colors.white,
        ),
    ),
    label: '',
),

You can change the values of height, width and color to match your needs.

Also, I would recommend adding these parameters to your BottomNavigationBar to center the icons (use it only if you are going to keep all of the labels as empty strings):

showSelectedLabels: false,
showUnselectedLabels: false,