我想创建一个超链接显示在我的扑动应用程序。
超链接应该嵌入到文本或类似的文本视图中，如:
最近买的一本书是<a href='#'>this</a>
有什么提示吗?
当前回答
在Flutter 2.0中，引入了Link小部件。使用这个小部件来启动网页，也可以导航到应用程序中的新屏幕。在使用它之前，你需要使用url_launcher包。
url_launcher: ^6.0.8
更多信息
Link(
uri: Uri.parse('https://androidride.com'),
//target: LinkTarget.self,
builder: (context, followLink) {
return RichText(
text: TextSpan(children: [
TextSpan(
text: 'Click here: ',
style: TextStyle(
fontSize: 20,
color: Colors.black,
),
),
TextSpan(
text: 'AndroidRide',
style: TextStyle(
color: Colors.blue,
decoration: TextDecoration.underline,
fontWeight: FontWeight.bold,
fontSize: 21,
),
recognizer: TapGestureRecognizer()
..onTap = followLink,
),
]),
);
}),
),
SizedBox(
height: 20,
),
Link(
uri: Uri.parse('/second'),
builder: (context, followLink) {
return InkWell(
onTap: followLink,
child: Text(
'Go to Second Screen',
style: TextStyle(
fontSize: 20,
color: Colors.blue,
decoration: TextDecoration.underline,
),
),
);
},
),
其他回答
Flutter没有内置的超链接支持，但您可以自己伪造它。画廊的抽屉里有个例子，飞镖。他们使用一个RichText小部件包含一个彩色的TextSpan，它有一个识别器属性来处理点击:
RichText(
text: TextSpan(
children: [
TextSpan(
style: bodyTextStyle,
text: seeSourceFirst,
),
TextSpan(
style: bodyTextStyle.copyWith(
color: colorScheme.primary,
),
text: repoText,
recognizer: TapGestureRecognizer()
..onTap = () async {
final url = 'https://github.com/flutter/gallery/';
if (await canLaunch(url)) {
await launch(
url,
forceSafariVC: false,
);
}
},
),
TextSpan(
style: bodyTextStyle,
text: seeSourceSecond,
),
],
),
在Flutter 2.0中，引入了Link小部件。使用这个小部件来启动网页，也可以导航到应用程序中的新屏幕。在使用它之前，你需要使用url_launcher包。
url_launcher: ^6.0.8
更多信息
Link(
uri: Uri.parse('https://androidride.com'),
//target: LinkTarget.self,
builder: (context, followLink) {
return RichText(
text: TextSpan(children: [
TextSpan(
text: 'Click here: ',
style: TextStyle(
fontSize: 20,
color: Colors.black,
),
),
TextSpan(
text: 'AndroidRide',
style: TextStyle(
color: Colors.blue,
decoration: TextDecoration.underline,
fontWeight: FontWeight.bold,
fontSize: 21,
),
recognizer: TapGestureRecognizer()
..onTap = followLink,
),
]),
);
}),
),
SizedBox(
height: 20,
),
Link(
uri: Uri.parse('/second'),
builder: (context, followLink) {
return InkWell(
onTap: followLink,
child: Text(
'Go to Second Screen',
style: TextStyle(
fontSize: 20,
color: Colors.blue,
decoration: TextDecoration.underline,
),
),
);
},
),
可以使用flutter_linkify包 https://pub.dev/packages/flutter_linkify 只是想提供另一种选择。 包会自动划分文本并突出显示http/https 结合插件url_launcher你可以启动url 你可以查看下面的例子:
完整代码如下
import 'package:flutter/material.dart';
import 'package:flutter_linkify/flutter_linkify.dart';
import 'dart:async';
import 'package:url_launcher/url_launcher.dart';
void main() => runApp(new LinkifyExample());
class LinkifyExample extends StatelessWidget {
@override
Widget build(BuildContext context) {
return new MaterialApp(
title: 'flutter_linkify example',
home: Scaffold(
appBar: AppBar(
title: Text('flutter_linkify example'),
),
body: Center(
child: Linkify(
onOpen: _onOpen,
text: "Made by https://cretezy.com \n\nMail: example@gmail.com \n\n this is test http://pub.dev/ ",
),
),
),
);
}
Future<void> _onOpen(LinkableElement link) async {
if (await canLaunch(link.url)) {
await launch(link.url);
} else {
throw 'Could not launch $link';
}
}
}
你可以使用链接文本https://pub.dev/packages/link_text 然后像这样使用它
final String _text = 'Lorem ipsum https://flutter.dev\nhttps://pub.dev';
@override
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: LinkText(
text: _text,
textAlign: TextAlign.center,
),
),
);
}
再添加一个简单而整洁的技巧，因为上面的技巧对于某些用例来说过于复杂。我用RichText - WidgetSpan, TextButton和URL启动包。只需根据您的需要修改下面的示例块。
结果:
代码:
class UserAgreementText extends StatelessWidget {
const UserAgreementText({Key? key}) : super(key: key);
@override
Widget build(BuildContext context) {
return Row(
children: [
Expanded(
child: RichText(
textAlign: TextAlign.center,
text: TextSpan(
text: 'By logging in, you accept our ',
style: Theme.of(context).textTheme.bodySmall,
children: const <InlineSpan>[
WidgetSpan(
alignment: PlaceholderAlignment.baseline,
baseline: TextBaseline.alphabetic,
child: LinkButton(
urlLabel: "Terms and Conditions",
url: "https://example.com/terms-and-conditions"),
),
TextSpan(
text: ' and ',
),
WidgetSpan(
alignment: PlaceholderAlignment.baseline,
baseline: TextBaseline.alphabetic,
child: LinkButton(
urlLabel: "Privacy Policy",
url: "https://example.com/privacy-policy"),
),
],
),
),
),
],
);
}
}
link_button.dart
class LinkButton extends StatelessWidget {
const LinkButton({Key? key, required this.urlLabel, required this.url})
: super(key: key);
final String urlLabel;
final String url;
Future<void> _launchUrl(String url) async {
final Uri uri = Uri.parse(url);
if (!await launchUrl(uri)) {
throw 'Could not launch $uri';
}
}
@override
Widget build(BuildContext context) {
return TextButton(
style: TextButton.styleFrom(
padding: EdgeInsets.zero,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(0),
),
tapTargetSize: MaterialTapTargetSize.shrinkWrap,
visualDensity: VisualDensity.compact,
minimumSize: const Size(0, 0),
textStyle: Theme.of(context).textTheme.bodySmall,
),
onPressed: () {
_launchUrl(url);
},
child: Text(urlLabel),
);
}
}
注意:如果遇到与调用launchUrl相关的错误，请确保安装了URL启动器包，然后重新构建应用程序。
