Hero Animations In Flutter App With Example-Beautiful Flutter Animations In Dart Language

In this tutorial, we’ll learn Flutter hero animations in detail with the help of practical Flutter code examples. Everything will be discussed step by step and in detail, so you can better understand it.

What is Flutter Hero Animation?

A hero animation is simply a flying animation that takes place during the transition of flutter app screens when we navigate from one screen to another screen in the flutter app. That’s the time when hero animations work.

Demo

Implementation of Hero Animation in Flutter

Let’s see how we can use our hero animation in our flutter app. For that, let’s look at the code given below:

Hero(
  tag: 'test hero tag',
  child: Text('Hero animated text')
    )

As you can see we have a wrapper a text widget inside a hero class. The hero class is used to do the hero animations, it has a tag constructor in which we pass a unique value. It identifies a particular hero, from where a hero comes or where.

A simple way is that if you want to do a hero animation between two widgets then just wrap both widgets in a hero class and use the same tag e.g. tag: ‘unique tag’.

Now if you want hero animation to take place between both of them then just put them on different screens and navigate from the screen where one of these two widgets is present and navigate to the other screen which has the other widget.

Then you will see a hero animation during the transition in the flutter app. Enough of the theory thing, let’s understand it with a flutter app code.

Gesture Detector

As you can see in the above code, there is no triggering from one page to another. Let’s see how we can make our text clickable:

GestureDetector(
    onTap:(){}
     child: Text('Hero animated text')
               )

As you can see, we have wrapped our text widget with a gesture detector class. If you want to make a text widget, container widget, or any widget clickable then you just need to wrap it with the gesture detector widget. The on-tap constructor is used to define which function will that widget perform after it is clicked.

We will use it to navigate to the other screen where our other hero widget is defined, so we can see a hero animation in our flutter app. Let’s see how:

Explanation

For that, we have to use two screens:

• First Screen
• Second Screen

First Screen

Scaffold(
body:

Hero(
         tag: 'just a tag',
         child: GestureDetector(
          onTap: () {
            Navigator.of(context).push(PageRouteBuilder(
            transitionDuration: Duration(milliseconds: 600),
            reverseTransitionDuration
            Duration(milliseconds: 200),
             pageBuilder:
                 (context, animation, secondaryAnimation) =>
                   HeroAnimationPage(
                      )));
                      },
                  child: Text('Perform hero animation')))

Second Screen

Hero(
tag: 'just a tag',
child: Text('Hero animation performed'))

In the second screen, we just need to define our target hero widget like this,  flutter will do the rest for us. Now when you click the text mentioned above on the first screen then you will be navigated to this screen along with a beautiful flutter hero animation.

Now, that you have understood how it works. Let’s implement a beautiful example as mentioned and if you implement it then you will see a beautiful animation takes place during page transitions in your flutter app.