Toast flutter is a popular widget in flutter that allows developers to display short messages or notifications to the end-users. With its simple and easy-to-use API, developers can display information to the end-users related to the current application state, error messages, or just simple greetings.
This article aims to provide a brief overview of Toast flutter, its usage, and how to use it with code examples.
What is Toast Flutter?
As mentioned earlier, the Toast flutter widget is used to display short messages or notifications to the end-users. It is a simple pop-up that appears at the bottom of the screen and disappears after a few seconds, providing information to the end-users.
In flutter, the Toast is called 'ScaffoldMessenger' and is available from the scaffold. The ScaffoldMessenger is a widget that allows messages to pass between the scaffold and its descendants, making it an ideal component to use for displaying Toast.
Usage of Toast Flutter
To use the Toast in flutter, you need to follow these simple steps:
- Create a scaffold widget and its descendant widget(s).
- Call the ScaffoldMessenger to display the Toast.
Here is a simple code example to create a Scaffold widget and display a Toast:
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Toast Example',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: Scaffold(
appBar: AppBar(
title: Text('Flutter Toast Example'),
),
body: Center(
child:
ElevatedButton(child: Text('Show Toast'), onPressed: showToast),
),
),
);
}
void showToast() {
ScaffoldMessenger.of(context).showSnackBar(SnackBar(
content: Text('This is a Toast!'),
duration: Duration(milliseconds: 500),
));
}
}
In this code example, we have created a Scaffold widget with an AppBar and a Center widget with an ElevatedButton. The ElevatedButton widget calls the showToast function when pressed, which displays the Toast using ScaffoldMessenger.
The ScaffoldMessenger, in turn, displays the Toast using the showSnackBar method with a SnackBar widget. The SnackBar widget has a text message 'This is a Toast!' and a duration of 500 milliseconds.
Customizing Toast Flutter
By default, the Toast flutter popup appears at the bottom of the screen and disappears after a few seconds. However, you can customize Toast flutter by specifying its duration, behavior, and position.
Here is an example of how to customize a Toast flutter in flutter:
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Toast Example',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: Scaffold(
appBar: AppBar(
title: Text('Flutter Toast Example'),
),
body: Center(
child: ElevatedButton(
child: Text('Show Toast'), onPressed: () => showToast(context)),
),
),
);
}
void showToast(BuildContext context) {
final snackBar = SnackBar(
content: Text('This is a custom Toast!'),
action: SnackBarAction(
label: 'Undo',
onPressed: () {
// Some code
},
),
duration: Duration(seconds: 2),
elevation: 2,
behavior: SnackBarBehavior.floating,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.only(
topLeft: Radius.circular(10),
topRight: Radius.circular(10),
),
),
backgroundColor: Colors.green,
margin: EdgeInsets.only(bottom: 20, right: 20, left: 20),
);
ScaffoldMessenger.of(context).showSnackBar(snackBar);
}
}
In this example, we have added behavior, shape, and background color to the SnackBar widget. We have also added an action button with a label 'Undo' and specified its onPressed callback method.
We have set its duration to two seconds, elevation to 2, and behavior to SnackBarBehavior.floating. The shape to RoundedRectangle with the border radius of 10 and the background color to green. Lastly, we have set the margin to 20 pixels from the bottom, right, and left.
Conclusion
Toast flutter is a popular widget in flutter that allows developers to display short messages or notifications to the end-users. With its simple and easy-to-use API, developers can display information to the end-users related to the current application state, error messages, or just simple greetings.
In this article, we have provided a brief overview of Toast flutter, its usage, and how to customize it with code examples. We hope this article helps you understand how to use Toast flutter in your flutter applications.
here are some more information about the previous topics:
-
Flutter vs React Native:
Flutter and React Native both are popular frameworks used for developing cross-platform mobile applications. Flutter uses Dart programming language while React Native uses JavaScript. Flutter is known for its faster development and hot reload feature while React Native is preferred for its performance and industry acceptance. Both frameworks have their own advantages and disadvantages, and the choice between them ultimately depends on the specific needs of a project. -
Provider State Management:
Provider is a state management solution in Flutter that allows developers to manage the state of the application in a simple and efficient manner. It uses the InheritedWidget class to pass data down the widget hierarchy and update the UI accordingly. Provider also provides support for different types of state management, such as change notifier, value notifier, and future provider. -
Flutter Widgets:
Flutter widgets are the building blocks of a Flutter application. Widgets are divided into two categories: StatelessWidget and StatefulWidget. StatelessWidget is a widget that does not have any internal state, while StatefulWidget is a widget that can have an internal state. Widgets provide a declarative way of building a UI, making it easy for developers to create complex and interactive interfaces. -
Flutter Animations:
Flutter provides a variety of animation options for building interactive and engaging user interfaces. Some of the animation options include Tween Animation, Animated Widget, Animated Builder, and Hero Animation. These animation options provide developers with the tools necessary to create dynamic and visually appealing user interfaces. -
Flutter Layouts:
Flutter provides different types of layouts for building a responsive UI. Some of the commonly used layouts include Columns, Rows, Stack, Expanded, and ConstrainedBox. These layouts allow developers to customize the UI based on the specific needs of the application. Flutter also provides support for different screen sizes and orientation, making it easy to build an application that works on multiple devices.
Popular questions
- What is Toast Flutter?
Toast Flutter is a widget in Flutter that allows developers to display short messages or notifications to the end-users.
- How can you display a Toast using ScaffoldMessenger in Flutter?
You can display a Toast using ScaffoldMessenger in Flutter by calling the showSnackBar method with a SnackBar widget containing the desired text message and duration.
- How can you customize a Toast in Flutter?
You can customize a Toast in Flutter by specifying its duration, behavior, position, elevation, background color, margin, and more in the SnackBar widget.
- What is the difference between Toast and SnackBar widget in Flutter?
Toast and SnackBar widget in Flutter are similar in that they both display short messages or notifications, but SnackBar is designed to be used with Material Design and provides additional customization options.
- Can you use Toast in Flutter with Stateless widgets?
Yes, you can use Toast in Flutter with both StatefulWidget and StatelessWidget widgets. However, if you want to change the state of the widget based on the Toast message, then you should use StatefulWidget.
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