Hello everyone. Today I wanted to write about Flutter version 3.27. I’m always excited about updates. And so is this one. Let’s see what has changed.
Flutter version 3.27 was released this month and it includes many improvements and enhancements both in terms of performance and ease of use. I have reviewed them for you under certain headings.
Performance Enhancements
Impeller Render Engine Updates
Flutter’s graphics performance has been greatly improved with the Impeller rendering engine. This engine provides a smoother experience, especially for animations and graphics-intensive applications. For example, if you are developing an e-commerce application with high-resolution images, page transition freezes are significantly reduced in this version.
WebAssembly Optimizations
Flutter web apps are now better optimized for WebAssembly. This makes your app load faster in browsers. For example, if you are building an online education platform, your users can now access course content faster.
Improvements to Desktop Platforms
Flutter now offers more advanced native plugin support for Windows, macOS and Linux. For example, if your Windows application requires a system-level file manager integration, this has become easier. In addition, keyboard and mouse inputs in desktop apps are more fluid, which is especially advantageous for desktop gaming and productivity apps.
New Tools for Developers
What Changed in the Test Vehicles?
- Integrated testing tools have been improved. Now it’s easier to make sure your app works the same on every platform.
- For example, if you’re developing a banking app, you can test that users can perform account transactions seamlessly on both Android and iOS.
Firebase Integration
Integration processes have been streamlined for developers using Firebase. For example, when developing a real-time chat application, it takes less time to set up the Firebase infrastructure.
Hot Reload Improvements
You can see your changes faster without restarting your app. This is a huge time saver, especially during intensive coding.
Internationalization and Localization (i18n)
Flutter offers a better fit for right-to-left typed languages (RTL) and multilingual support. For example, if you’re developing a news app and need to deliver content in both Turkish and Arabic, it’s now easier.
Material 3 Updates
Flutter has become more compatible with Material 3, Google’s latest design language. New widgets and customization options have been added. For example, if you are developing a sports tracking app, you have more widget options for a modern look. I’ve written and tried out some of them for you below and I hope you find them inspiring.
Spacing Property for Column and Row
Column and Row widgets can now use the spacing parameter to specify the space between children. This feature allows you to automatically add space between each child.
Example Usage:
Column(
spacing: 22.0, // 22 pixels of space between each widget
children: [
Text('Title'),
Text('Subtitle'),
ElevatedButton(onPressed: () {}, child: Text('Continue')),
],
)
In this code, 22 pixels of space is automatically left between each widget. Previously you had to do this manually with SizedBox or Padding.
foregroundDecoration Property for Container
The foregroundDecoration added to the Container widget allows you to add a decoration layer above the background but below the content. This is especially useful for opaque effects or foreground highlights.
Example Usage:
Container(
decoration: BoxDecoration(color: Colors.blue),
foregroundDecoration: BoxDecoration(
gradient: LinearGradient(
colors: [Colors.transparent, Colors.black54],
begin: Alignment.topCenter,
end: Alignment.bottomCenter,
),
),
child: Text(
'Background Decoration',
style: TextStyle(color: Colors.white,fontSize:32.0),
),
)
This example adds a translucent gradient effect over a text.
NavigationDrawer Updates
With Material 3, NavigationDrawer has been given a more modern look and increased customization options. Now you can more easily manage spacing between icons and labels, and create grouped sections.
Example Usage:
Scaffold(
body: Container(),
drawer: const NavigationDrawer(
children: [
NavigationDrawerDestination(
icon: Icon(Icons.home),
label: Text('HomePage'),
),
Divider(),
NavigationDrawerDestination(
icon: Icon(Icons.settings),
label: Text('Settings'),
),
],
),
),
Badge Widget
Material 3 introduces a special widget for badges. This can be used to highlight notification numbers or status indicators.
Example Usage:
Badge(
label: Text('5'),
child: Icon(Icons.notifications),
)
This code adds the badge “5” on a notification icon.
hintStyle and prefixIconStyle for TextField
In TextField, you can now customize text and icons more flexibly with properties like hintStyle and prefixIconStyle.
Example Usage:
TextField(
decoration: InputDecoration(
hintText: 'User Name',
hintStyle: TextStyle(color: Colors.grey),
prefixIcon: Icon(Icons.person),
prefixIconColor: Colors.pink,
),
)
ElevatedButton Improvements
ElevatedButton is now more easily customizable. For example, there are more options for adjusting margins and heights.
Example Usage:
ElevatedButton.icon(
onPressed: () {},
icon: Icon(Icons.add),
label: Text('Add'),
style: ElevatedButton.styleFrom(
padding: EdgeInsets.symmetric(horizontal: 24, vertical: 12),
elevation: 8,
),
)
Shadow and Border Improvements in Card Widget
Material 3 offers a modern approach to the design of cards. Shadow levels and borders are optimized to look more natural.
Example Usage:
Card(
elevation: 8,
shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(6)),
child: Padding(
padding: const EdgeInsets.all(28.0),
child: Text('A Modern Card with Material 3'),
),
)
Adaptive Design Features
Material 3 supports widgets that automatically adapt based on device size and type. For example, automatic switching between NavigationBar and NavigationRail.
Example Usage:
LayoutBuilder(
builder: (context, constraints) {
if (constraints.maxWidth > 600) {
return NavigationRail(
destinations: [
NavigationRailDestination(
icon: Icon(Icons.home),
label: Text('Home Page'),
),
NavigationRailDestination(
icon: Icon(Icons.settings),
label: Text('Settings'),
),
NavigationRailDestination(
icon: Icon(Icons.person),
label: Text('Profile'),
),
],
);
} else {
return NavigationBar(
destinations: [
NavigationDestination(
icon: Icon(Icons.home),
label: 'Home Page',
),
NavigationDestination(
icon: Icon(Icons.settings),
label: 'Settings',
),
NavigationDestination(
icon: Icon(Icons.person),
label: 'Profile',
),
],
);
}
},
)
More Modular Coding with ViewModelBuilder
With Flutter’s ViewModel approach, it has become easier to separate application logic. For example, we can now use ViewModelBuilder to create a “todo list”.
Example Usage:
class TodoViewModel extends ChangeNotifier {
List<String> _todos = [];
List<String> get todos => _todos;
void addTodo(String todo) {
_todos.add(todo);
notifyListeners();
}
}
ViewModelBuilder<TodoViewModel>(
viewModelBuilder: () => TodoViewModel(),
builder: (context, viewModel, child) {
return Column(
children: [
ListView.builder(
shrinkWrap: true,
itemCount: viewModel.todos.length,
itemBuilder: (context, index) {
return Text(viewModel.todos[index]);
},
),
TextField(
onSubmitted: (value) => viewModel.addTodo(value),
),
],
);
},
);Use Case: It provides a more readable and modular structure for managing a list dynamically.
New Improvements of SliverAppBar
SliverAppBar now offers more customization options that enhance the user experience with features like stretchTriggerOffset.
Example Usage:
CustomScrollView(
slivers: [
SliverAppBar(
expandedHeight: 200,
floating: true,
stretch: true,
stretchTriggerOffset: 100,
flexibleSpace: FlexibleSpaceBar(
title: Text('Sliver App Bar'),
background: Image.network(
'https://picsum.photos/250?image=9',
opacity: const AlwaysStoppedAnimation(.5),
fit: BoxFit.cover,
),
),
),
SliverList(
delegate: SliverChildBuilderDelegate(
(context, index) => ListTile(title: Text('Item $index')),
childCount: 50,
),
),
],
);
Use Case: It gives apps a more dynamic feel when the user pulls down the screen.
New Features of ScrollView
Now ScrollView components have more advanced features. Especially keyboardDismissBehavior is a great addition to optimize the user experience.
Example Usage:
SingleChildScrollView(
keyboardDismissBehavior: ScrollViewKeyboardDismissBehavior.onDrag,
child: Column(
children: [
TextField(
decoration: InputDecoration(labelText: 'User Name'),
),
ElevatedButton(
onPressed: () {},
child: Text('Login'),
),
],
),
);Use Case: Allows the keyboard to close automatically when the user scrolls down the screen.
Adaptive Deliveries (Device Adaptive Widgets)
Material 3 makes it easy to create different looks based on device type. For example, you can create different layouts between a phone and a tablet.
Example Usage:
AdaptiveWidget(
phone: Center(child: Text('This is a phone view')),
tablet: Center(child: Text('This is a tablet view')),
);Use Case: Creating adaptive designs for different devices on the same code base.
Automatic Harmony of Colors with ColorScheme Harmonization
The new ColorScheme.fromSeed method makes it easier to create an entire theme using a single color seed.
Example Usage:
MaterialApp(
theme: ThemeData(
colorScheme: ColorScheme.fromSeed(seedColor: Colors.teal),
),
home: Scaffold(
appBar: AppBar(title: Text('Color Matching')),
body: Center(child: Text('Hello Flutter!')),
),
);
Use Case: Create a more consistent theming system for enterprise applications.
Custom Transitions with Transition Animation API
Flutter 3.27 introduces new animation APIs to more easily customize page transitions.
Example Usage:
PageRouteBuilder(
pageBuilder: (context, animation, secondaryAnimation) => SecondPage(),
transitionsBuilder: (context, animation, secondaryAnimation, child) {
return FadeTransition(
opacity: animation,
child: child,
);
},
);Use Case: Add animations to page transitions, giving apps a professional touch.
Gradient Theme Support
The new update supports gradient themes, enabling modern designs.
Example Usage:
Container(
decoration: BoxDecoration(
gradient: LinearGradient(
colors: [Colors.blue, Colors.purple],
),
),
child: Center(child: Text('Gradient Theme')),
);
Use Case: Adds visual appeal to home screens.
Error Corrections and Stability
- Many bugs reported in previous versions have been fixed.
- For example, some animation bugs on iOS and compatibility issues with older devices on Android have been fixed.
I hope you found this article useful! If you appreciate the information provided, you have the option to support me by Buying Me A Coffee! Your gesture would be greatly appreciated!
Conclusion
Flutter 3.27 is an important step forward to boost performance, improve the developer experience and adapt to modern design trends. For more information on these updates, check out the Flutter official documentation.
Thank you so much for reading.
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Selin.
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