Flutter – Animation in Route Transition

Last Updated : 09 Apr, 2025

Routes are simply Pages in Flutter applications. An application often needs to move from one page to another. However, animations can be used to make these transitions smoother. These animations can be used to curve or tween the Animation object of the PageRouteBuilder class to alter the transition animation.

We will discuss them in detail here.

Steps to Implement Animation in Route Transition

Step 1 : Adding the PageRouteBuilder

Using the PageRouteBuilder, create two routes with the first route as the Homepage with a button “Goto page 2″ and the second route with just an empty page named “Page 2”, using the code below.

main.dart:

Dart

import 'package:flutter/material.dart';  void main() {   runApp(const MaterialApp(     home: Page1(),   )); }  class Page1 extends StatelessWidget {   const Page1({Key? key}) : super(key: key);   @override   Widget build(BuildContext context) {     return Scaffold(       appBar: AppBar(),       body: Center(           child: ElevatedButton(         onPressed: () {           Navigator.of(context).push(_createRoute());         },         child: const Text('Go to Page 2'),       )      ),     );   } }  Route _createRoute() {   return PageRouteBuilder(     pageBuilder: (context, animation, secondaryAnimation) => const Page2(),     transitionsBuilder: (context, animation, secondaryAnimation, child) {       return child;     },   ); }  class Page2 extends StatelessWidget {   const Page2({Key? key}) : super(key: key);   @override   Widget build(BuildContext context) {     return Scaffold(       appBar: AppBar(),       body: const Center(         child: Text('Page 2'),       ),     );   } }

Step 2 : Adding a tween

You can build a tween of an animation object by using the below code :

main.dart:

Dart

transitionsBuilder: (context, animation, secondaryAnimation, child) {   var begin = Offset(0.0, 1.0);   var end = Offset.zero;   var tween = Tween(begin: begin, end: end);   var offsetAnimation = animation.drive(tween);   return child; },

Step 3 : Creating an AnimatedWidget

The AnimatedWidget has the property of its state once the animation value changes. You can create one like below:

Dart

transitionsBuilder: (context, animation, secondaryAnimation, child) {   var begin = Offset(0.0, 1.0);   var end = Offset.zero;   var tween = Tween(begin: begin, end: end);   var offsetAnimation = animation.drive(tween);    return SlideTransition(     position: offsetAnimation,     child: child,   ); },

Step 4 : Creating a CurveTween

Use the below code to create a CurveTween:

Dart

var curve = Curves.ease; var curveTween = CurveTween(curve: curve);

Step 5 : Combining Both Tweens

Use the chain() method to combine two tweens, as shown below:

Dart

var begin = Offset(0.0, 1.0); var end = Offset.zero; var curve = Curves.ease;  var tween = Tween(begin: begin, end: end).chain(CurveTween(curve: curve));

No, we use the animation.drive() method to create an Animation object of the combined tweens, as shown below:

Dart

return SlideTransition( position: animation.drive(tween), child: child, );

Complete Source Code

main.dart:

Dart

import 'package:flutter/material.dart';  void main() {   runApp(const MaterialApp(     debugShowCheckedModeBanner: false,     home: Homepage(),   )); }  class Homepage extends StatelessWidget {   const Homepage({Key? key}) : super(key: key);    @override   Widget build(BuildContext context) {     return Scaffold(       appBar: AppBar(         title: const Text('GeeksForGeeks'),         backgroundColor: Colors.green,         foregroundColor: Colors.white,       ),       body: Center(         child: ElevatedButton(           style: ElevatedButton.styleFrom(             backgroundColor: Colors.green,           ),           onPressed: () {             // Navigate to Page 2 with a custom transition             Navigator.of(context).push(_createRoute());           },           child: const Text(             'Go to Page 2',             style: TextStyle(               color: Colors.white,             ),           ),         ),       ),     );   } }  // Function to create a custom route with a slide transition Route _createRoute() {   return PageRouteBuilder(     pageBuilder: (context, animation, secondaryAnimation) => const Page2(),     transitionsBuilder: (context, animation, secondaryAnimation, child) {       var begin = const Offset(0.0, 1.0);       var end = Offset.zero;       var curve = Curves.ease;        var tween = Tween(begin: begin, end: end).chain(CurveTween(curve: curve));        return SlideTransition(         position: animation.drive(tween),         child: child,       );     },   ); }  class Page2 extends StatelessWidget {   const Page2({Key? key}) : super(key: key);    @override   Widget build(BuildContext context) {     return Scaffold(       appBar: AppBar(         backgroundColor: Colors.blue,         foregroundColor: Colors.white,       ),       body: const Center(         child: Text('Page 2'),       ),     );   } }

Output:

Flutter - Physics Simulation in Animation

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Article Tags :

Flutter – Animation in Route Transition

Steps to Implement Animation in Route Transition

Step 1 : Adding the PageRouteBuilder

Step 2 : Adding a tween

Step 3 : Creating an AnimatedWidget

Step 4 : Creating a CurveTween

Step 5 : Combining Both Tweens

Complete Source Code

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