Learn how to implement the SliverAppBar widget in a Flutter app by walking through some practical examples.

The AppBar widget is essential for any mobile app. It is used to show important information such as the page title, tabs, images, and actions that can be taken on the page.

We’ve covered how to customize the AppBar in a Flutter app. But what if you want to animate the AppBar when a user scrolls up and down?

For example, the AppBar might show a full profile picture when the user scrolls up and slowly transition to show only the user name when the user scrolls down. This effect is called a floating app bar. In Flutter this can be achieved using the widget called SliverAppBar.

In this tutorial, we’ll show you how to implement the SliverAppBar widget in a Flutter app by walking through some practical examples.

Here’s what we’ll cover:

• What is SliverAppBar?
• Customizing the floating behavior
• Adding AppBar inside SliverAppBar
• Adding TabBar with SliverAppBar
• Listening to SliverAppBar’s status (expanded/collapsed)

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