Dart 选择后更改ListTile的背景色,并自定义tiles颤振的高度
我制作了一个Dart 选择后更改ListTile的背景色,并自定义tiles颤振的高度,dart,flutter,material-design,Dart,Flutter,Material Design,我制作了一个GridView,但是现在我在GridView中有一些ListTiles需要在选择时选择,我希望更改背景颜色 我还面临着另一个问题,我想定制这些列表的高度,但我没有获得任何成功。我要附上图片,我得到的输出和我想要的输出 我得到的: 我想要什么: 代码如下: class _SelectLanguageNewState extends State<SelectLanguageNew> { List<Results> listResponseData; bo
GridView
,但是现在我在GridView
中有一些ListTiles
需要在选择时选择,我希望更改背景颜色
我还面临着另一个问题,我想定制这些列表的高度,但我没有获得任何成功。我要附上图片,我得到的输出和我想要的输出
我得到的:
我想要什么:
代码如下:
class _SelectLanguageNewState extends State<SelectLanguageNew> {
List<Results> listResponseData;
bool _color;
@override
void initState() {
// TODO: implement initState
super.initState();
getLang();
_color = false;
}
Future getLang() async {
await getLanguage().then((GetLanguageResponse getlanguage)
{
if(getlanguage.isSuccess)
{
setState(() {
listResponseData = getlanguage.responseData.listResults;
});
}
});
}
@override
Widget build(BuildContext context) {
var size = MediaQuery.of(context).size;
final double itemHeight = (size.height - kToolbarHeight - 24) / 2;
final double itemWidth = size.width / 2;
void _onTileClicked(int index){
debugPrint("You tapped on item $index");
}
// Get grid tiles
List<Widget> _getTiles() {
final List<Widget> tiles = <Widget>[];
for (int i = 0; i < listResponseData.length; i++) {
tiles.add(ListTileTheme(
selectedColor: Colors.blue,
child: new InkWell(
child: new Card(
elevation: 5.0,
child: new Container(
color: _color ? Colors.black : Colors.grey,
alignment: Alignment.center,
child: new Text(listResponseData[i].nativeText,
style: TextStyle(color: Colors.white),),
),
),
onTap: () {
setState(() {
_color = !_color;
});
/* showDialog(
barrierDismissible: false,
context: context,
child: new CupertinoAlertDialog(
content: new Container(
width: 40.0,
child: new CircularProgressIndicator()),
actions: <Widget>[
new FlatButton(
onPressed: () {
Navigator.of(context).pop();
},
child: new Text("OK"))
],
),
);*/
},
),
));
}
return tiles;
}
return Scaffold(
bottomNavigationBar: BottomAppBar(
child: Container(
height: 50.0,
child: InkWell(
onTap: ()=> print('pressed'),
child: Center(
child: Text('Next', style: TextStyle(color: Colors.white,
),
),
),
),
),
color: Colors.blue,
),
body: new Container(
child: listResponseData == null || listResponseData.isEmpty ? new Container(
child: new Text('Loading data......'),
) : new GridView.count(
shrinkWrap: true,
scrollDirection: Axis.vertical,
childAspectRatio:1.0,
crossAxisCount: MediaQuery.of(context).size.width <= 400.0 ? 3 : MediaQuery.of(context).size.width >= 1000.0 ? 5 : 2,
// Create a grid with 2 columns. If you change the scrollDirection to
// horizontal, this would produce 2 rows.
crossAxisSpacing: 5.0,
// Generate 100 Widgets that display their index in the List
children: _getTiles() ,
),
),
);
}
}
class\u SelectLanguageNewState扩展状态{
列出listResponseData;
颜色;
@凌驾
void initState(){
//TODO:实现initState
super.initState();
getLang();
_颜色=假;
}
Future getLang()异步{
等待getLanguage()。然后((GetLanguageResponse getLanguage)
{
if(getlanguage.issucess)
{
设置状态(){
listResponseData=getlanguage.responseData.listResults;
});
}
});
}
@凌驾
小部件构建(构建上下文){
var size=MediaQuery.of(context).size;
最终双项目高度=(size.height-kToolbarHeight-24)/2;
最终双项目宽度=size.width/2;
void\u onTileClicked(整数索引){
debugPrint(“您点击了项$index”);
}
//获取网格瓷砖
列表_getTiles(){
最终列表瓷砖=[];
for(int i=0;i打印('pressed'),
儿童:中心(
子项:Text('Next',样式:Text样式(颜色:Colors.white,
),
),
),
),
),
颜色:颜色,蓝色,
),
主体:新容器(
子级:listResponseData==null | | listResponseData.isEmpty?新容器(
子项:新文本('加载数据…'),
):new GridView.count(
收缩膜:对,
滚动方向:轴垂直,
childAspectRatio:1.0,
crossAxisCount:MediaQuery.of(context).size.width=1000.0?5:2,
//创建一个包含两列的网格。如果将滚动方向更改为
//水平,这将产生2行。
交叉轴间距:5.0,
//生成100个在列表中显示其索引的小部件
子项:_getTiles(),
),
),
);
}
}
屏幕截图
完整解决方案:
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
theme: ThemeData(scaffoldBackgroundColor: Colors.black, brightness: Brightness.dark),
home: Scaffold(
appBar: AppBar(title: Text("Choose Language")),
body: HomePage(),
),
);
}
}
class HomePage extends StatefulWidget {
@override
_HomePageState createState() => _HomePageState();
}
class _HomePageState extends State<HomePage> {
int _languageIndex = -1;
@override
Widget build(BuildContext context) {
return Padding(
padding: const EdgeInsets.all(8.0),
child: Stack(
alignment: Alignment.bottomCenter,
children: <Widget>[
GridView.count(
crossAxisCount: 2,
crossAxisSpacing: 10,
mainAxisSpacing: 10,
childAspectRatio: 2.4,
children: <Widget>[
GestureDetector(
child: _buildWidget("English", 0),
onTap: () => setState(() => _languageIndex = 0),
),
GestureDetector(
child: _buildWidget("Española", 1),
onTap: () => setState(() => _languageIndex = 1),
),
GestureDetector(
child: _buildWidget("Française", 2),
onTap: () => setState(() => _languageIndex = 2),
),
GestureDetector(
child: _buildWidget("Gaeilge", 3),
onTap: () => setState(() => _languageIndex = 3),
),
GestureDetector(
child: _buildWidget("العربية", 4),
onTap: () => setState(() => _languageIndex = 4),
),
GestureDetector(
child: _buildWidget("جغتای", 5),
onTap: () => setState(() => _languageIndex = 5),
),
GestureDetector(
child: _buildWidget("ગુજરાતી", 6),
onTap: () => setState(() => _languageIndex = 6),
),
GestureDetector(
child: _buildWidget("हिन्दी", 7),
onTap: () => setState(() => _languageIndex = 7),
),
GestureDetector(
child: _buildWidget("日本語", 8),
onTap: () => setState(() => _languageIndex = 8),
),
GestureDetector(
child: _buildWidget("коми", 9),
onTap: () => setState(() => _languageIndex = 9),
),
GestureDetector(
child: _buildWidget("ਲਹਿੰਦੀ", 10),
onTap: () => setState(() => _languageIndex = 10),
),
GestureDetector(
child: _buildWidget("Schwyzerdütsch", 11),
onTap: () => setState(() => _languageIndex = 11),
),
],
),
SizedBox(
width: double.maxFinite,
height: 44,
child: RaisedButton(
child: Text("SUBMIT"),
onPressed: () {
print("languageIndex = ${_languageIndex}");
},
),
),
],
),
);
}
Widget _buildWidget(String language, int index) {
bool isSelected = _languageIndex == index;
return Container(
alignment: Alignment.center,
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(6),
border: Border.all(color: isSelected ? Colors.blue[300].withOpacity(0.8) : Colors.grey[700]),
color: Colors.grey[900],
),
child: Text(
language,
style: TextStyle(fontSize: 16, color: isSelected ? Colors.blue[400] : null),
),
);
}
}
void main()=>runApp(MyApp());
类MyApp扩展了无状态小部件{
@凌驾
小部件构建(构建上下文){
返回材料PP(
主题:主题数据(脚手架背景颜色:Colors.black,亮度:bright.dark),
家:脚手架(
appBar:appBar(标题:文本(“选择语言”)),
正文:主页(),
),
);
}
}
类主页扩展了StatefulWidget{
@凌驾
_HomePageState createState()=>\u HomePageState();
}
类_HomePageState扩展状态{
int_languageIndex=-1;
@凌驾
小部件构建(构建上下文){
返回填充(
填充:常数边集全部(8.0),
子:堆栈(
对齐:对齐.bottomCenter,
儿童:[
GridView.count(
交叉轴计数:2,
横轴间距:10,
平均间距:10,
儿童方面:2.4,
儿童:[
手势检测器(
子项:_buildWidget(“英语”,0),
onTap:()=>setState(()=>_languageIndex=0),
),
手势检测器(
孩子:_buildWidget(“Española”,1),
onTap:()=>setState(()=>\u languageIndex=1),
),
手势检测器(
孩子:_buildWidget(“Française”,2),
onTap:()=>setState(()=>\u languageIndex=2),
),
手势检测器(
子项:_buildWidget(“Gaeilge”,3),
onTap:()=>设置状态(()=>_languageIndex=3),
),
手势检测器(
子项:اbuildWidget(“العبية”),4),
onTap:()=>setState(()=>\u languageIndex=4),
),
手势检测器(
孩子:buildWidget(“جغتای”,5),
onTap:()=>setState(()=>\u languageIndex=5),
),
手势检测器(
子项:_buildWidget(“ગુજરાતી", 6),
onTap:()=>设置状态(()=>_languageIndex=6),
),
手势检测器(
子项:_buildWidget(“हिन्दी", 7),
onTap:()=>setState(()=>_languageIndex=7),
),
手势检测器(
子项:_buildWidget(“日本語", 8),
onTap:()=>设置状态(()=>_languageIndex=8),
),
手势检测器(