In Flutter, Image.assets() or Image.network() Widget is used to display images from locally or from a URL. Images can be locally stored in the program or fetched from a network and can be displayed using the Image Widget. Animations can be applied to Images via many techniques. Hence, in this article, we are going to apply animation to the Image Rotation, which will give a smooth rotation of the image.
A sample video is provided below to give you an idea of what we will cover in this article.
Demo Video
Step-by-Step Implementation
Step 1: Create a new Flutter Application
Create a new Flutter application using the command Prompt. To create a new app, write the following command and run it.
flutter create app_nameTo know more about it refer this article: Creating a Simple Application in Flutter.
Step 2: Import the Package
First of all, import material.dart file.
import 'package:flutter/material.dart';Step 3: Execute the main Method
Here, the execution of our app starts.
void main() {
runApp(MyApp());
}
Step 4: Create MyApp Class
In this class, we are going to implement the MaterialApp, Here, we are also setting the Theme of our App.
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
theme: ThemeData(
primarySwatch: Colors.green, // Set the app's primary theme color
),
debugShowCheckedModeBanner: false,
home: MyHomePage(),
);
}
}
Step 5: Create MyHomePage Class
In this class, the initState method initializes the animation controller and defines an animation using a Tween. The Tween specifies the starting and ending values for the rotation angle. The Transform.rotate widget is used to rotate the image based on the current value of the animation. Basically, in this class, we are going to implement the main logic for applying animation to the rotation of the image. Comments are added for better understanding.
AnimatedBuilder(
animation: _animation,
builder: (context, child) {
// Use Transform.rotate to rotate the
// Image based on the animation value
return Transform.rotate(
angle: _animation.value,
child: Image.network(
'https://static.startuptalky.com/2021/06/GeeksforGeeks-StartupTalky.jpg', // Replace with your image
width: 200,
height: 200,
),
);
},
),
class MyHomePage extends StatefulWidget {
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage>
with SingleTickerProviderStateMixin {
late AnimationController _controller;
late Animation<double> _animation;
@override
void initState() {
super.initState();
// Create an animation controller
_controller = AnimationController(
vsync: this, // vsync is set to this for performance reasons
duration: Duration(seconds: 2), // Set the duration of the animation
);
// Create a Tween for the rotation angle
_animation = Tween<double>(
begin: 0, // Start rotation angle
end: 2 * 3.141, // End rotation angle (2 * pi for a full circle)
).animate(_controller);
// Repeat the animation indefinitely
_controller.repeat();
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Image Rotation Animation'),
backgroundColor: Colors.green,
foregroundColor: Colors.white,
),
body: Center(
child: AnimatedBuilder(
animation: _animation,
builder: (context, child) {
// Use Transform.rotate to rotate the Image based on the animation value
return Transform.rotate(
angle: _animation.value,
child: Image.network(
'https://static.startuptalky.com/2021/06/GeeksforGeeks-StartupTalky.jpg', // Replace with your image asset
width: 200,
height: 200,
),
);
},
),
),
);
}
@override
void dispose() {
// Dispose of the animation controller when the widget is disposed
_controller.dispose();
super.dispose();
}
}
Complete Source Code
main.dart:
import 'package:flutter/material.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
theme: ThemeData(
primarySwatch: Colors.green, // Set the app's primary theme color
),
debugShowCheckedModeBanner: false,
home: MyHomePage(),
);
}
}
class MyHomePage extends StatefulWidget {
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage>
with SingleTickerProviderStateMixin {
late AnimationController _controller;
late Animation<double> _animation;
@override
void initState() {
super.initState();
// Create an animation controller
_controller = AnimationController(
vsync: this, // vsync is set to this for performance reasons
duration: Duration(seconds: 2), // Set the duration of the animation
);
// Create a Tween for the rotation angle
_animation = Tween<double>(
begin: 0, // Start rotation angle
end: 2 * 3.141, // End rotation angle (2 * pi for a full circle)
).animate(_controller);
// Repeat the animation indefinitely
_controller.repeat();
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Image Rotation Animation'),
backgroundColor: Colors.green,
foregroundColor: Colors.white,
),
body: Center(
child: AnimatedBuilder(
animation: _animation,
builder: (context, child) {
// Use Transform.rotate to rotate the Image based on the animation value
return Transform.rotate(
angle: _animation.value,
child: Image.network(
'https://static.startuptalky.com/2021/06/GeeksforGeeks-StartupTalky.jpg', // Replace with your image asset
width: 200,
height: 200,
),
);
},
),
),
);
}
@override
void dispose() {
// Dispose of the animation controller when the widget is disposed
_controller.dispose();
super.dispose();
}
}