background_app_bar

Package Overview

Package selection guidance compiled from public package information, community data, and project usage.

The background_app_bar package is a Flutter plugin designed to maintain the background appearance of a SliverAppBar during scrolling. It ensures that the visual background—such as an image or gradient—remains visible and consistent as users scroll, enhancing the visual continuity of the app interface. Ideal for apps with rich, immersive designs, it works across multiple platforms including Android, iOS, Web, macOS, Windows, and Linux. The plugin integrates seamlessly with existing SliverAppBar implementations without requiring major code changes.

Use cases

Maintaining visual continuity in scrollable interfaces
Creating immersive app experiences with persistent backgrounds
Enhancing UI design consistency on scroll
Building visually rich dashboards or galleries
Implementing parallax effects with stable backgrounds

Key features

Preserves background during scroll
Supports images and gradients
Cross-platform compatibility
Easy integration with SliverAppBar
Minimal configuration required

Suitable for

Design-focused Flutter applications
Apps with complex scroll-based layouts
Developers prioritizing visual polish
Projects using SliverAppBar extensively
Teams building multi-platform apps

Considerations

May impact performance with large background assets
Requires careful handling of image resolution
Not suitable for simple, minimalistic UIs
Limited customization beyond background retention
Best used with optimized assets for smooth scrolling

Original README

Original README snapshot from the linked source repository. Visit the repository for the latest content.

Widget Background App Bar

A background app bar plugin, use this plugin if you want to preserve background of sliver app bar when scrolling,

inspired by GradientAppBar GitHub

Screenshots

Don't forget to tap + button 5 times

Getting Started

Depend on it by adding this to your pubspec.yaml file: background_app_bar: ^1.0.0
Import it: import 'package:background_app_bar/background_app_bar.dart'
Replace your current FlexibleSpaceBar (In the AppBar or SliverAppBar) to BackgroundFlexibleSpaceBar.

SliverAppBar(
    expandedHeight: _kAppBarSize,
    floating: false,
    pinned: true,
    snap: false,
    elevation: 0.0,
    backgroundColor: Colors.transparent,
    flexibleSpace: BackgroundFlexibleSpaceBar(
        title: widget.title != null ? Text(widget.title!) : null,
        centerTitle: false,
        titlePadding: const EdgeInsets.only(left: 20.0, bottom: 20.0),
        background: ClipRect(
            child: Container(
                child: BackdropFilter(
                    filter: ImageFilter.blur(sigmaX: 5.0, sigmaY: 5.0),
                    child: Container(
                        decoration: BoxDecoration(
                            color: Colors.black.withOpacity(0.5),
                        ),
                    ),
                ),
                decoration: const BoxDecoration(
                    image: DecorationImage(
                        image: AssetImage("images/bg.jpg"),
                        fit: BoxFit.fill,
                    ),
                ),
            ),
        ),
    ),
)

Search packages, repositories and app categories

Install package