flutter_floating_bottom_bar 1.2.1+1 
flutter_floating_bottom_bar: ^1.2.1+1 copied to clipboard
hashstudios.devA flutter package that allows showing a floating widget that can be used as a tab bar, bottom navigation bar, etc. The widget reacts to scrolling events too.
Simple basic example using only required arguments - child and body.
BottomBar(
child: Padding(
padding: const EdgeInsets.all(16.0),
child: Text(
"This is the floating widget",
textAlign: TextAlign.center,
style: TextStyle(color: Colors.white),
),
),
body: (context, controller) =>
InfiniteListPage(controller: controller, color: Colors.blue,),
)
Simple basic example that demonstrates all properties of the BottomBar widget, and how to use them.
class MyHomePage extends StatefulWidget {
MyHomePage({Key? key, required this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> with SingleTickerProviderStateMixin {
late int currentPage;
late TabController tabController;
final List<Color> colors = [Colors.yellow, Colors.red, Colors.green, Colors.blue, Colors.pink];
@override
void initState() {
currentPage = 0;
tabController = TabController(length: 5, vsync: this);
tabController.animation!.addListener(
() {
final value = tabController.animation!.value.round();
if (value != currentPage && mounted) {
changePage(value);
}
},
);
super.initState();
}
void changePage(int newPage) {
setState(() {
currentPage = newPage;
});
}
@override
void dispose() {
tabController.dispose();
super.dispose();
}
@override
Widget build(BuildContext context) {
final Color unselectedColor = colors[currentPage].computeLuminance() < 0.5 ? Colors.black : Colors.white;
return SafeArea(
child: Scaffold(
appBar: AppBar(
title: Text(widget.title),
backgroundColor: Colors.black,
),
body: BottomBar(
child: TabBar(
indicatorPadding: const EdgeInsets.fromLTRB(6, 0, 6, 0),
controller: tabController,
indicator: UnderlineTabIndicator(
borderSide: BorderSide(
color: currentPage == 0
? colors[0]
: currentPage == 1
? colors[1]
: currentPage == 2
? colors[2]
: currentPage == 3
? colors[3]
: currentPage == 4
? colors[4]
: unselectedColor,
width: 4),
insets: EdgeInsets.fromLTRB(16, 0, 16, 8)),
tabs: [
SizedBox(
height: 55,
width: 40,
child: Center(
child: Icon(
Icons.home,
color: currentPage == 0 ? colors[0] : unselectedColor,
)),
),
SizedBox(
height: 55,
width: 40,
child: Center(
child: Icon(
Icons.search,
color: currentPage == 1 ? colors[1] : unselectedColor,
)),
),
SizedBox(
height: 55,
width: 40,
child: Center(
child: Icon(
Icons.add,
color: currentPage == 2 ? colors[2] : unselectedColor,
)),
),
SizedBox(
height: 55,
width: 40,
child: Center(
child: Icon(
Icons.favorite,
color: currentPage == 3 ? colors[3] : unselectedColor,
)),
),
SizedBox(
height: 55,
width: 40,
child: Center(
child: Icon(
Icons.settings,
color: currentPage == 4 ? colors[4] : unselectedColor,
)),
),
],
),
fit: StackFit.expand,
icon: (width, height) => Center(
child: IconButton(
padding: EdgeInsets.zero,
onPressed: null,
icon: Icon(
Icons.arrow_upward_rounded,
color: unselectedColor,
size: width,
),
),
),
borderRadius: BorderRadius.circular(500),
duration: Duration(seconds: 1),
curve: Curves.decelerate,
showIcon: true,
width: MediaQuery.of(context).size.width * 0.8,
barColor: colors[currentPage].computeLuminance() > 0.5 ? Colors.black : Colors.white,
start: 2,
end: 0,
offset: 10,
barAlignment: Alignment.bottomCenter,
iconHeight: 35,
iconWidth: 35,
reverse: false,
hideOnScroll: true,
scrollOpposite: false,
onBottomBarHidden: () {},
onBottomBarShown: () {},
body: (context, controller) => TabBarView(
controller: tabController,
dragStartBehavior: DragStartBehavior.down,
physics: const BouncingScrollPhysics(),
children: colors.map((e) => InfiniteListPage(controller: controller, color: e)).toList(),
),
),
),
);
}
}
With Floating action button #
Simple basic example with a floating action button to achieve this effect.
class MyHomePage extends StatefulWidget {
MyHomePage({Key? key, required this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> with SingleTickerProviderStateMixin {
late int currentPage;
late TabController tabController;
final List<Color> colors = [
Colors.yellow,
Colors.red,
Colors.green,
Colors.blue,
Colors.pink,
];
@override
void initState() {
currentPage = 0;
tabController = TabController(length: 5, vsync: this);
tabController.animation?.addListener(
() {
final value = tabController.animation!.value.round();
if (value != currentPage && mounted) {
changePage(value);
}
},
);
super.initState();
}
void changePage(int newPage) {
setState(() {
currentPage = newPage;
});
}
@override
void dispose() {
tabController.dispose();
super.dispose();
}
@override
Widget build(BuildContext context) {
final Color unselectedColor = colors[currentPage].computeLuminance() < 0.5 ? Colors.black : Colors.white;
final Color unselectedColorReverse = colors[currentPage].computeLuminance() < 0.5 ? Colors.white : Colors.black;
return SafeArea(
child: Scaffold(
appBar: AppBar(
title: Text(widget.title),
backgroundColor: Colors.black,
),
body: BottomBar(
clip: Clip.none,
child: Stack(
alignment: Alignment.center,
clipBehavior: Clip.none,
children: [
TabBar(
indicatorPadding: const EdgeInsets.fromLTRB(6, 0, 6, 0),
controller: tabController,
indicator: UnderlineTabIndicator(
borderSide: BorderSide(
color: currentPage <= 4 ? colors[currentPage] : unselectedColor,
width: 4,
),
insets: EdgeInsets.fromLTRB(16, 0, 16, 8)),
tabs: [
SizedBox(
height: 55,
width: 40,
child: Center(
child: Icon(
Icons.home,
color: currentPage == 0 ? colors[0] : unselectedColor,
)),
),
SizedBox(
height: 55,
width: 40,
child: Center(
child: Icon(
Icons.search,
color: currentPage == 1 ? colors[1] : unselectedColor,
),
),
),
SizedBox(
height: 55,
width: 40,
child: Center(
child: Icon(
Icons.add,
color: currentPage == 2 ? colors[2] : unselectedColorReverse,
),
),
),
SizedBox(
height: 55,
width: 40,
child: Center(
child: Icon(
Icons.favorite,
color: currentPage == 3 ? colors[3] : unselectedColor,
),
),
),
SizedBox(
height: 55,
width: 40,
child: Center(
child: Icon(
Icons.settings,
color: currentPage == 4 ? colors[4] : unselectedColor,
),
),
),
],
),
Positioned(
top: -25,
child: FloatingActionButton(
onPressed: () {},
child: Icon(Icons.add),
),
)
],
),
fit: StackFit.expand,
icon: (width, height) => Center(
child: IconButton(
padding: EdgeInsets.zero,
onPressed: null,
icon: Icon(
Icons.arrow_upward_rounded,
color: unselectedColor,
size: width,
),
),
),
borderRadius: BorderRadius.circular(500),
duration: Duration(milliseconds: 500),
curve: Curves.decelerate,
showIcon: true,
width: MediaQuery.of(context).size.width * 0.8,
barColor: colors[currentPage].computeLuminance() > 0.5 ? Colors.black : Colors.white,
start: 2,
end: 0,
offset: 10,
barAlignment: Alignment.bottomCenter,
iconHeight: 30,
iconWidth: 30,
reverse: false,
hideOnScroll: true,
scrollOpposite: false,
onBottomBarHidden: () {},
onBottomBarShown: () {},
body: (context, controller) => TabBarView(
controller: tabController,
dragStartBehavior: DragStartBehavior.down,
physics: const BouncingScrollPhysics(),
children: colors
.map(
(e) => InfiniteListPage(
key: ValueKey('infinite_list_key#${e.toString()}'),
controller: controller,
color: e,
),
)
.toList(),
),
),
),
);
}
}
Floating Bottom Search Bar #
A simple Material search bar in the bottom of your app, which hides on scroll down.
class MyHomePage extends StatelessWidget {
MyHomePage({Key? key, required this.title}) : super(key: key);
final String title;
@override
Widget build(BuildContext context) {
return SafeArea(
child: Scaffold(
appBar: AppBar(
title: Text(title),
backgroundColor: Colors.black,
),
body: BottomBar(
child: Padding(
padding: const EdgeInsets.all(8.0),
child: Card(
elevation: 10,
child: Container(
height: 46,
child: TextField(
style: Theme.of(context).textTheme.subtitle2,
maxLines: 1,
minLines: 1,
textCapitalization: TextCapitalization.sentences,
cursorColor: Theme.of(context).primaryColor,
decoration: InputDecoration(
suffixIcon: Icon(Icons.search),
contentPadding: const EdgeInsets.all(16),
hintStyle: Theme.of(context).textTheme.subtitle2,
hintText: 'Search...',
border: InputBorder.none,
labelStyle: Theme.of(context).textTheme.subtitle2,
),
),
),
),
),
fit: StackFit.expand,
borderRadius: BorderRadius.circular(12),
duration: Duration(milliseconds: 300),
curve: Curves.decelerate,
showIcon: false,
width: MediaQuery.of(context).size.width - 32,
barColor: Colors.transparent,
start: 2,
end: 0,
offset: 10,
barAlignment: Alignment.bottomCenter,
body: (context, controller) => InfiniteListPage(controller: controller, color: Colors.blueAccent),
),
),
);
}
}
Floating Search Top Bar #
A simple Material search bar in the top of your app, which hides on scroll down.
# Simply change these values in the bottom search bar to convert it into top search bar
start: 0,
end: 2,
bottom: MediaQuery.of(context).size.height,
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Metadata
A flutter package that allows showing a floating widget that can be used as a tab bar, bottom navigation bar, etc. The widget reacts to scrolling events too.
Homepage
Repository (GitHub)
View/report issues
Contributing
Documentation
License
MIT (license)
