AppBar Flutter

In Flutter, SliverAppBar is a successor to the AppBar widget, which allows you to create the floating app bar effect . The SliverAppBar expands the AppBar when the screen is scrolled up and collapsed on scroll down. You can also completely remove or hide the AppBar when the user is scrolling down a long list.

Firstly declare the AppBar widget that you will use in your Scaffold. Now you can get the height of your appBar using its preferred size: double height = appBar .

Flutter AppBar is an app component built in accordance with Material Design guidelines. It’s usually placed at the top of the screen and has the ability to contain other widgets within its layout.31 Mar 2021