我对Flutter和Dart很新,我似乎无法找到这个特定主题的任何提示。我试图将3 RadioListTiles
放入Row
,如此:
Row(
children: [
Expanded(
child:RadioListTile<GoalSelection>(
title: Text(
'Net',
style: Theme.of(context).textTheme.body1,
),
value: GoalSelection.net,
groupValue: _goalSelection,
onChanged: (GoalSelection value) {
setState(() {
_goalSelection = value;
});
},
),
),
Expanded(
child: RadioListTile<GoalSelection>(
title: Text(
'Gross',
style: Theme.of(context).textTheme.body1,
),
value: GoalSelection.gross,
groupValue: _goalSelection,
onChanged: (GoalSelection value) {
setState(() {
_goalSelection = value;
});
},
),
),
Expanded(
child: RadioListTile<GoalSelection>(
title: Text(
'Salary',
style: Theme.of(context).textTheme.body1,
),
value: GoalSelection.salary,
groupValue: _goalSelection,
onChanged: (GoalSelection value) {
setState(() {
_goalSelection = value;
});
},
),
),
],
),
按钮布局很好,但标签似乎浪费了很多空间。我放下了目前下面的截图。我尝试将Expanded
,RadioListTile
和Text
放在Padding
窗口小部件中(一次一个)来手动将填充设置为0,但它没有&做任何事情。我也尝试将Expanded
更改为Flexible
,即使我认为这不会改变任何内容。我现在不知所措。有没有办法让这个布局工作?我有点假设我正在做的事情真的很蠢。
答案 0 :(得分:2)
您可以连续使用Radio
和Text
小部件。但是Radio
也有相同的填充问题。要删除填充,您可以将Radio
放在SizedBox
的子项中。
例如:-SizedBox(height: 20, width: 20, child: Radio(.......))
答案 1 :(得分:1)
您只需要将“ dense”属性设置为true,例如:
implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core")
implementation("org.jetbrains.kotlinx:kotlinx-coroutines-reactor")
答案 2 :(得分:0)
我们可以使用Flexible小部件控制RadioListTile的填充。如要在“行”小部件中安排3个RadioListTiles。请尝试使用以下代码,它将起作用。
Row(
children: <Widget>[
Flexible(
fit: FlexFit.loose,
child:
RadioListTile(
title: const Text('hello'),
onChanged: (value) {
setState(() {});
},
),
),
Flexible(
fit: FlexFit.loose,
child:
RadioListTile(
title: const Text('Lafayette'),
onChanged: (value) {
setState(() {});
},
),
)
],
),
做,让我知道。一旦尝试了上面的代码。如果它解决了您的问题,请接受我的回答是有用的,并提供您宝贵的意见。
答案 3 :(得分:0)
我遇到了同样的问题。您可以尝试使用Radio,Text,InkWell,Padding进行自定义。
class LabeledRadio extends StatelessWidget {
const LabeledRadio({
this.label,
this.padding,
this.groupValue,
this.value,
this.onChanged,
});
final String label;
final EdgeInsets padding;
final bool groupValue;
final bool value;
final Function onChanged;
@override
Widget build(BuildContext context) {
return InkWell(
onTap: () {
if (value != groupValue)
onChanged(value);
},
child: Padding(
padding: padding,
child: Row(
children: <Widget>[
Radio<bool>(
groupValue: groupValue,
value: value,
onChanged: (bool newValue) {
onChanged(newValue);
},
),
Text(label),
],
),
),
);
}
}
// ...
bool _isRadioSelected = false;
@override
Widget build(BuildContext context) {
return Scaffold(
body: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <LabeledRadio>[
LabeledRadio(
label: 'This is the first label text',
padding: const EdgeInsets.symmetric(horizontal: 5.0),
value: true,
groupValue: _isRadioSelected,
onChanged: (bool newValue) {
setState(() {
_isRadioSelected = newValue;
});
},
),
LabeledRadio(
label: 'This is the second label text',
padding: const EdgeInsets.symmetric(horizontal: 5.0),
value: false,
groupValue: _isRadioSelected,
onChanged: (bool newValue) {
setState(() {
_isRadioSelected = newValue;
});
},
),
],
),
);
}
文档:https://api.flutter.dev/flutter/material/RadioListTile-class.html#material.RadioListTile.3
这是我修复填充的方法:
enum ContactSex { nam, nu, khac }
class CreateContactScreen extends StatefulWidget {
static const routeName = './create_contact';
@override
_CreateContactScreenState createState() => _CreateContactScreenState();
}
class _CreateContactScreenState extends State<CreateContactScreen> {
ContactSex _contaxtSex = ContactSex.nu;
final _form = GlobalKey<FormState>();
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(
'TẠO LIÊN HỆ',
style: kHeaderTextStyle,
),
actions: <Widget>[
FlatButton(
onPressed: () {
Navigator.pop(context);
},
child: Text('XONG', style: TextStyle(color: Colors.white),),
)
],
),
body: Container(
padding: EdgeInsets.symmetric(horizontal: 15.0, vertical: 20.0),
child: Form(
key: _form,
child: SingleChildScrollView(
child: Column(
children: <Widget>[
TextFormField(
decoration: InputDecoration(
labelText: 'Tên*',
),
textInputAction: TextInputAction.next,
onFieldSubmitted: (_) {
// TODO: when submit this text field
},
validator: (value) {
if (value.isEmpty) {
return 'Hãy nhập tên cho liên hệ.';
}
return null;
},
onSaved: (value) {
// TODO : when save the whole form
},
),
TextFormField(
decoration: InputDecoration(
labelText: 'Họ',
),
textInputAction: TextInputAction.next,
onFieldSubmitted: (_) {
// TODO: when submit this text field
},
// validator: (value) {
// if (value.isEmpty) {
// return null;
// }
// return null;
// },
onSaved: (value) {
// TODO : when save the whole form
},
),
TextFormField(
decoration: InputDecoration(
labelText: 'Số điện thoại*',
),
keyboardType: TextInputType.phone,
textInputAction: TextInputAction.next,
onFieldSubmitted: (_) {
// TODO: when submit this text field
},
validator: (value) {
if (value.isEmpty) {
return 'Hãy nhập số điện thoại cho liên hệ.';
}
return null;
},
onSaved: (value) {
// TODO : when save the whole form
},
),
TextFormField(
decoration: InputDecoration(
labelText: 'Email',
),
textInputAction: TextInputAction.next,
onFieldSubmitted: (_) {
// TODO: when submit this text field
},
// validator: (value) {
// if (value.isEmpty) {
// return null;
// }
// return null;
// },
onSaved: (value) {
// TODO : when save the whole form
},
),
Container(
padding: EdgeInsets.only(top: 15.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Text(
'Giới tính',
style: TextStyle(fontSize: 14.0),
),
Row(
mainAxisSize: MainAxisSize.max,
mainAxisAlignment: MainAxisAlignment.spaceAround,
children: <Widget>[
LabeledRadio(
label: 'Nữ',
padding: EdgeInsets.all(0),
groupValue: _contaxtSex,
value: ContactSex.nu,
onChanged: (ContactSex newValue) {
setState(() {
_contaxtSex = newValue;
});
},
),LabeledRadio(
label: 'Nam',
padding: EdgeInsets.all(0),
groupValue: _contaxtSex,
value: ContactSex.nam,
onChanged: (ContactSex newValue) {
setState(() {
_contaxtSex = newValue;
});
},
),LabeledRadio(
label: 'Khác',
padding: EdgeInsets.all(0),
groupValue: _contaxtSex,
value: ContactSex.khac,
onChanged: (ContactSex newValue) {
setState(() {
_contaxtSex = newValue;
});
},
),
],
),
],
),
)
],
)),
),
),
);
}
}
class LabeledRadio extends StatelessWidget {
final String label;
final EdgeInsets padding;
final ContactSex groupValue;
final ContactSex value;
final Function onChanged;
const LabeledRadio(
{this.label, this.padding, this.groupValue, this.value, this.onChanged});
@override
Widget build(BuildContext context) {
return InkWell(
onTap: () {
if (value != groupValue) {
onChanged(value);
}
},
child: Padding(
padding: padding,
child: Row(
children: <Widget>[
Radio<ContactSex>(
groupValue: groupValue,
value: value,
onChanged: (ContactSex newValue) {
onChanged(newValue);
},
),
Text(label),
],
),
),
);
}
}
答案 4 :(得分:0)
复制RadioListTile
代码并在新文件上创建您的代码并将其粘贴到其中。
删除引起错误的导入:
import 'package:flutter/widgets.dart'; // leave it
import 'package:flutter/material.dart'; //add
import 'list_tile.dart'; //remove
import 'radio.dart'; //remove
import 'theme.dart'; //remove
import 'theme_data.dart'; //remove
然后向其添加以下填充,如下所示:
//Inside the file locate this widget and Add the padding or remove it. I needed to remove it and add 5.
return MergeSemantics(
child: ListTileTheme.merge(
contentPadding: EdgeInsets.only( // Add this
left: 5,
right: 0,
bottom: 0,
top: 0
),
selectedColor: activeColor ?? Theme.of(context).accentColor,
child: ListTile(
leading: leading,
title: title,
subtitle: subtitle,
trailing: trailing,
isThreeLine: isThreeLine,
dense: dense,
enabled: onChanged != null,
onTap: onChanged != null && !checked ? () { onChanged(value); } : null,
selected: selected,
),
),
);
然后按如下所示将文件导入您的项目:
import 'package:Project_Name/common/customComponets/custom_radio_list_tile.dart' as CustomRadioListTile;
然后像这样使用它:
CustomRadioListTile.RadioListTile(); // and that's how I managed to do it. Thought I should share.
答案 5 :(得分:0)
你应该像这样手动实现
制作一组 Radio()
和 Text()
并用 InkWell()
包裹以进行状态处理。现在通过 materialTapTargetSize: MaterialTapTargetSize.shrinkWrap,
删除多余的收音机空间就是这样。通过示例代码获得灵感。
Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
InkWell(
onTap: () {
setState(() {
_radioVenue = 0;
});
},
child: Row(
children: [
Radio(
materialTapTargetSize:
MaterialTapTargetSize.shrinkWrap,
activeColor: primaryColor,
groupValue: _radioVenue,
onChanged: (value) {},
value: 0,
),
Text('From our list')
],
),
),
InkWell(
onTap: () {
setState(() {
_radioVenue = 1;
});
},
child: Row(
children: [
Radio(
materialTapTargetSize:
MaterialTapTargetSize.shrinkWrap,
activeColor: primaryColor,
groupValue: _radioVenue,
onChanged: (value) {},
value: 1,
),
Text('From our list')
],
),
),
],
),
我们在本示例中涵盖了这两个问题。
RadioListTile()
。答案 6 :(得分:-1)
只需将 SizedBox() 小部件包裹起来即可。
SizedBox(
height: 40,
child: RadioListTile(
value: user,
groupValue: selectedUser,
title: "First User",
onChanged: (currentUser) {
},
selected: selectedUser == user,
activeColor: Colors.green,
),