Flutter 我需要标签登录url启动器TEL,但它会自动删除
我想在Flatter url launcher中按原样拨打这个号码,但它删除了字符串最后一位的hashtag符号Flutter 我需要标签登录url启动器TEL,但它会自动删除,flutter,dart,Flutter,Dart,我想在Flatter url launcher中按原样拨打这个号码,但它删除了字符串最后一位的hashtag符号 onTap: () { String no = '*477*4*1#'; launch('tel:$no'); }, 您需要对特殊字符使用URL编码,因此等于\%23您可以复制粘贴并运行下面的完
onTap: () {
String no = '*477*4*1#';
launch('tel:$no');
},
您需要对特殊字符使用URL编码,因此
等于\%23
您可以复制粘贴并运行下面的完整代码您可以使用
Uri.encodeComponent('*477*4*1#')代码>
代码片段
onPressed: () {
String no = Uri.encodeComponent('*477*4*1#');
launch('tel:$no');
},
工作演示
完整代码
import 'package:flutter/material.dart';
import 'package:url_launcher/url_launcher.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
visualDensity: VisualDensity.adaptivePlatformDensity,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
int _counter = 0;
void _incrementCounter() {
setState(() {
_counter++;
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
RaisedButton(
child: Text('click'),
onPressed: () {
String no = Uri.encodeComponent('*477*4*1#');
launch('tel:$no');
},
),
Text(
'You have pushed the button this many times:',
),
Text(
'$_counter',
style: Theme.of(context).textTheme.headline4,
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: _incrementCounter,
tooltip: 'Increment',
child: Icon(Icons.add),
),
);
}
}
导入“包装:颤振/材料.省道”;
导入“package:url_launcher/url_launcher.dart”;
void main(){
runApp(MyApp());
}
类MyApp扩展了无状态小部件{
@凌驾
小部件构建(构建上下文){
返回材料PP(
标题:“颤振演示”,
主题:主题数据(
主样本:颜色。蓝色,
视觉密度:视觉密度。自适应平台密度,
),
主页:MyHomePage(标题:“颤振演示主页”),
);
}
}
类MyHomePage扩展StatefulWidget{
MyHomePage({Key,this.title}):超级(Key:Key);
最后的字符串标题;
@凌驾
_MyHomePageState createState()=>\u MyHomePageState();
}
类_MyHomePageState扩展状态{
int _计数器=0;
void _incrementCounter(){
设置状态(){
_计数器++;
});
}
@凌驾
小部件构建(构建上下文){
返回脚手架(
appBar:appBar(
标题:文本(widget.title),
),
正文:中(
子:列(
mainAxisAlignment:mainAxisAlignment.center,
儿童:[
升起的按钮(
子项:文本('click'),
已按下:(){
字符串no=Uri.encodeComponent('*477*4*1#');
启动(“电话:$no”);
},
),
正文(
“您已经按了这么多次按钮:”,
),
正文(
“$”计数器“,
风格:Theme.of(context).textTheme.headline4,
),
],
),
),
浮动操作按钮:浮动操作按钮(
按下时:\ u递增计数器,
工具提示:“增量”,
子:图标(Icons.add),
),
);
}
}