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Learn how to effectively manage animations in your Flutter apps by stopping them after they play once, even when navigating between tabs.
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This video is based on the question https://stackoverflow.com/q/73416656/ asked by the user 'Ballazx' ( https://stackoverflow.com/u/11672206/ ) and on the answer https://stackoverflow.com/a/73416767/ provided by the user 'Sayyid J' ( https://stackoverflow.com/u/15366030/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Stop Animation After Time in Flutter Applications

Flutter is a fantastic toolkit for creating engaging mobile applications. One common challenge developers face is managing animations, especially when you want them to play only once. In this guide, we will explore a practical method to stop an animation after it has been shown once in your Flutter application, particularly when using a TabBarView.

The Problem at Hand

Imagine you have a SliverAppBar containing multiple TabBarViews. The first tab displays an image with an animation. The requirement is to show this animation only once when the app is loaded. However, if a user switches to another tab and then returns to the first tab, the animation plays again, which is not what we want.

The Code Overview

Here's a simplified version of the critical parts of your Flutter application:

[[See Video to Reveal this Text or Code Snippet]]

The main issue arises within the animation code. Let's dig deeper into the solution.

The Solution

To create a solution to stop the animation after the first play, we can implement a few key changes to manage the animation state effectively.

Step 1: Add a Boolean State

First, we need to introduce a boolean variable to keep track of whether the animation has played or not. We will place this in the state of your widget:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Modify the Animation Controller

Next, we need to modify the initialization of our AnimationController. We will listen to its status to update our boolean accordingly:

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Use the Animation in Your Widget

Now, ensure that you only build the SlideTransition when the animation should be played. This step relies on our _firstTime boolean variable:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

By implementing these straightforward changes, you can effectively manage your animations in Flutter applications to ensure they only play once when the app is loaded. This ensures a cleaner user experience and prevents repetitive animations.

With Flutter’s powerful animation capabilities, you can create visually appealing apps without sacrificing usability. Happy coding!