I have a DropdownButtonHideUnderline in my AppBar. I adjusted the color of its container to stand out from the AppBar. I would also like to adjust its height to be less then the AppBar (small padding around the text):
Here is my code:
#override
Widget build(BuildContext context) {
if (widget.appState.isLoading)
return Center(
child: CircularProgressIndicator(),
);
else
return DefaultTabController(
length: 5,
child: Scaffold(
appBar: AppBar(
title: Text("Home"),
actions: <Widget>[
DropdownButtonHideUnderline(
child: Container(
color: Colors.white,
child: DropdownButton(
isDense: true,
value: widget.appState.user.accountNumbers[widget.appState.selectedAccountIndex],
items: widget.appState.user.accountNumbers.map<DropdownMenuItem>((accountNumber) {
return DropdownMenuItem(
child: Text(
accountNumber,
style: Theme.of(context).textTheme.caption,
),
value: accountNumber,
);
}).toList(),
onChanged: (selectedItem) => setState((){
widget.appState.selectedAccountIndex =
widget.appState.user.accountNumbers.indexOf(selectedItem);
}),
),
),
),
IconButton(
...
),
],
bottom: TabBar(
...
),
),
body: TabBarView(
...
),
),
);
}
You can wrap your text widget inside DropdownMenuItem with Container.
//inside DropdownMenuItem
Container(
padding: EdgeInsets.symmetric(vertical: 10.0,),
child: Text(),
)
Thanks for the hints #rmtmckenzie and #yashthakkar1173. What I needed to do was to wrap DropdownButtonHideUnderline in a Container with padding: EdgeInsets.symmetric(vertical: 17.0). That did the trick.
Related
I have an issue with the whole screen scrolling in Flutter. Only the Expanded widget is able to scroll on-screen in my app but I want to make the whole screen scrollable. How can I do that? Here is my code e.g.
Widget build(BuildContext context) {
return Scaffold(
key: scaffoldKey,
backgroundColor: Colors.white,
appBar: AppBar(
title: Text(
'My App',
style: AppTheme.of(context).title1,
),
elevation: 0,
backgroundColor: Colors.amber,
),
body: Column(
mainAxisSize: MainAxisSize.max,
children: [
Padding(
padding: EdgeInsetsDirectional.fromSTEB(10, 20, 10, 0),
child: Column(
. // Padding repeats two more times
.
.
.
Expanded(
child: MyWidget(
myProp1: value1,
myProp2: value2,
myProp3: value3,
myProp4: value4,
myProp5: value5,
myProp6: value6
) // MyWidget
), // Expanded
],
), // Column
); // Scaffold
}
I've tried to wrap Column with SingleChildScrollview widget but it didn't work for me. I guess I can not use Expanded widget in SingleChildScrollview. I also tried to use Container or etc. instead of Expanded and Column widgets but I couldn't solve this issue. Can anybody help me with it?
There is no need to wrap MyWidget with Expanded. Just Change Column into ListView:
Widget build(BuildContext context) {
return Scaffold(
backgroundColor: Colors.white,
appBar: AppBar(
title: Text(
'My App',
),
elevation: 0,
backgroundColor: Colors.amber,
),
body: ListView(
children: [
Padding(
padding: EdgeInsetsDirectional.fromSTEB(10, 20, 10, 0),
child: Column(
children: [
Padding(
padding: const EdgeInsets.all(8.0),
child: Container(
height: 500,
decoration: BoxDecoration(color: Colors.black),
),
),
Padding(
padding: const EdgeInsets.all(8.0),
child: Container(
height: 500,
decoration: BoxDecoration(color: Colors.black),
),
)
],
))
],
), // Column
); // Scaffold
}
You also can use the SingleChildScroll view as Child of Expanded widget will work fine
I am trying to construct a page with multiple widgets Row, Column, Expanded, ListView, etc...
I am a bit confused. I want a page scrollable with my widgets ThemeList.
I have the error :
A RenderFlex overflowed by 28 pixels on the bottom.
class SettingsViewState extends State<SettingsView> {
#override
Widget build(BuildContext context) {
return Scaffold(
resizeToAvoidBottomInset: false,
drawer: const NavDrawer(),
appBar: AppBar(
title: Text(AppLocalizations.of(context)!.settingsTitle),
backgroundColor: Theme.of(context).primaryColor,
),
body: CustomScrollView(slivers: [
SliverFillRemaining(
child: Column(
children: const [
ThemeList(),
SizedBox(height: 8),
ThemeList(),
SizedBox(height: 8),
ThemeList(),
],
),
),
]),
);
}
}
class ThemeList extends StatelessWidget {
const ThemeList({Key? key}) : super(key: key);
#override
Widget build(BuildContext context) {
return Expanded(
child: Padding(
padding: const EdgeInsets.all(10),
child: Container(
decoration: BoxDecoration(
border: Border.all(color: Theme.of(context).primaryColor, width: 2),
borderRadius: BorderRadius.circular(10),
),
child: Column(
children: <Widget>[
Row(
children: <Widget>[
Padding(
padding: const EdgeInsets.only(top: 5, left: 20),
child: Text(
AppLocalizations.of(context)!.settingsThemeSubTitle,
style: const TextStyle(
fontWeight: FontWeight.bold,
fontSize: 23,
),
),
)
],
),
ListView.builder(
shrinkWrap: true,
padding: const EdgeInsets.all(8),
itemCount: AppTheme.values.length,
itemBuilder: (context, index) {
final itemAppTheme = AppTheme.values[index];
var nameTheme = itemAppTheme.toString()
return Card(
color: appThemeData[itemAppTheme]?.primaryColor,
child: ListTile(
title: Text(
nameTheme,
style: appThemeData[itemAppTheme]?.textTheme.bodyText1,
),
onTap: () {
BlocProvider.of<ThemeBloc>(context).add(
ThemeChanged(theme: itemAppTheme),
);
Preferences.saveTheme(itemAppTheme);
},
),
);
},
)
],
),
),
),
);
}
}
Desired result :
Just wrap the ListView.builder() inside ThemeList with an Expanded and the problem would vanish.
If you want to have all the items inside each ThemeList displayed with a scroll for the whole screen then the easiest why is to do the following:
Change the CustomScrollView in the body of the Scaffold to be SingleChildScrollView with the Column as its child.
Remove the Expanded at the start of ThemeList.
Remove the ListView.builder() inside the ThemeList and replace it with any looping logic to directly render the cards, for example:
...AppTheme.values.map((itemAppTheme) {
var nameTheme = itemAppTheme.toString();
return Card(
color: appThemeData[itemAppTheme]?.primaryColor,
child: ListTile(
title: Text(
nameTheme,
style: appThemeData[itemAppTheme]?.textTheme.bodyText1,
),
onTap: () {
BlocProvider.of<ThemeBloc>(context).add(
ThemeChanged(theme: itemAppTheme),
);
Preferences.saveTheme(itemAppTheme);
},
),
);
}).toList()
There is an application page that is responsible for displaying devices. There is a code that returns AppBar, Body, Drawer.
Question: how do I put the description "List of devices" between AppBar and Body (as in the photo)
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
automaticallyImplyLeading: true,
backgroundColor: Colors.black,
title: const Text('IT', style: TextStyle(fontSize: 45,
fontWeight: FontWeight.w800,
color: Colors.white)),
centerTitle: true,
actions: [
IconButton(
icon: const Icon(Icons.filter_alt,
size: 30.0,),
color: Colors.white,
onPressed: () {
showDialog<Filter>(context: context, builder: (_) {
return FilterDialog(onApplyFilters: _filter,);
});
},
),
],
),
body: PhonesList(phones: filteredPhones),
drawer: Drawer(.....),
);
you use appbar bottom ... and customization
bottom: PreferredSize(
child: Container(
color: Colors.white,
child: row(
),
),
preferredSize: Size.fromHeight(kToolbarHeight)
),
Use bottom property of AppBar and add text inside it
Text will be shown at the bottom of AppBar
use a column widget below appbar or introduce a column widget on Body.
Column(
children:<Widget>[
Container(
decoration:BoxDecoration(
borderRadius:BorderRadius.circular(10),
color:Colors.green
),
child: Column(
children:<Widget>[
Text("iphone 11 ",style: TextStyle(color:Colors.white,fontSize:25),),
Text("ios 15")
])
),
Container(
decoration:BoxDecoration(
borderRadius:BorderRadius.circular(10),
color:Colors.green
),
child: Column(
children:<Widget>[
Text("iphone 13 ",style: TextStyle(color:Colors.white,fontSize:25),),
Text("ios 13")
])
),
]
),
I am trying to use Expand widget in Column so user can tap in any position of screen to increase counter, but there is an issue in alignment of text in crossAxisAlignment and mainAxisAlignment of the column it didn't apply on Expand widget as the following
return MaterialApp(
home: Scaffold(
backgroundColor: Colors.black12,
body: SafeArea(
child: Center(
child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Expanded(
child: GestureDetector(
onTap: () {
setState(() {
i++;
print(i);
});
},
child: Text(
i.toString(),
style: TextStyle(fontSize: 50.0, color: Colors.blueAccent),
textAlign: TextAlign.center,
),
),
),
],
),
),
),
),
);
You went with the wrong approach because you can't Center an Expanded because Expanded takes the entire available space inside Row or Column in your case Column with single Widget inside children the GestureDetector. Here is one of a solution for what you want to achieve
#override
Widget build(BuildContext context) {
return Scaffold(
backgroundColor: Colors.black12,
body: SafeArea(
child: Center(
child: Stack(
children: <Widget>[
Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Expanded(
child: GestureDetector(
onTap: () {
setState(() => i++;);
},
),
),
],
),
Align(
alignment: Alignment.center,
child: Text(
'$i',
style: TextStyle(fontSize: 50.0, color: Colors.blueAccent),
),
),
],
),
),
),
);
}
another solution using FlatButton inside SizedBox.expand()
so you don't need to fight with a single child column.
class _MyAppState extends State<MyApp> {
int i = 0;
#override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
backgroundColor: Colors.black12,
body: SafeArea(
child: SizedBox.expand(
child: FlatButton(
onPressed: () {
setState(() {
i++;
print(i);
});
},
child: Text(
i.toString(),
style: TextStyle(fontSize: 50.0, color: Colors.blueAccent),
),
),
),
),
),
);
}
}
I have a page with a DefaultTabController that is:
#override
Widget build(BuildContext context) {
return DefaultTabController(
length: 2,
child: Scaffold(
resizeToAvoidBottomPadding: true,
appBar: AppBar(
bottom: TabBar(
indicatorColor: Colors.red,
indicator: BoxDecoration(
color: buttonColor,
),
tabs: [Tab(text: "Login"), Tab(text: "Register", key: Key("tabRegistro"))],
),
centerTitle: true,
title: Text(appBarTitle)),
body: TabBarView(
children: [
new LoginPage(),
new RegisterPage(),
],
),
),
);
}
And for example, the LoginPage build is:
#override
Widget build(BuildContext context) {
return Scaffold(
resizeToAvoidBottomPadding: true,
key: _scaffoldKey,
body: SingleChildScrollView(
child: GestureDetector(
onTap: () {
FocusScope.of(context).unfocus();
},
child: Center(
child: Container(
color: backgroundColor,
child: Padding(
padding: const EdgeInsets.all(36.0),
child: Form(
key: formKey,
child: Column(
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisAlignment: MainAxisAlignment.start,
children: <Widget>[
SizedBox(
height: 155.0,
child: Image.asset(
"assets/images/pet.PNG",
fit: BoxFit.contain,
),
),
SizedBox(height: 20.0),
emailField,
SizedBox(height: 10.0),
passwordField,
SizedBox(height: 20.0),
loginButon,
SizedBox(height: 20.0),
GoogleSignInButton(
darkMode: true,
text: "Login with Google",
onPressed: () {
_sigIn();
}),
],
),
)),
),
),
)));
}
But when I'm writing, the keyboard cover the Textfields and they aren't visible.
With SingleChildScrollView before it works, but now it doesn't work propertly. I have tried to put resizeToAvoidBottomPadding: true but it doesn't work. What could I do to fix this problem?
The code is Ok, the problem is at Android.manifest.xml. I'm using Android Simulator and to hide the status bar I put these line:
android:theme="#android:style/Theme.Holo.NoActionBar.Fullscreen"
If i put the original line it works. The original line is:
android:theme="#style/LaunchTheme"