Flutter/外部ライブラリ/flutter user agent - 変更履歴

2020年12月1日 (火) 05:00にAdminによる

2020-12-01T05:00:30Z

Admin: /* サンプル */

2020-12-01T04:04:08Z

‎サンプル

Admin: /* サンプル起動 */

2020-12-01T03:53:02Z

‎サンプル起動

Admin: ページの作成:「==インストール== pubspec.yaml

 dependencies:   flutter_user_agent: ^1.2.2

==公式== https://pub.dev/packages/flutter_user_agent ==サンプル起動=...」

2020-12-01T03:52:40Z

ページの作成:「==インストール== pubspec.yaml <pre> dependencies: flutter_user_agent: ^1.2.2 </pre> ==公式== https://pub.dev/packages/flutter_user_agent ==サンプル起動=...」

新規ページ

==インストール==
pubspec.yaml
<pre>
dependencies:
flutter_user_agent: ^1.2.2
</pre>

==公式==
https://pub.dev/packages/flutter_user_agent

==サンプル起動==
WebView.platform = SurfaceAndroidWebView(); in initState().
==サンプル==
<pre>
import 'package:flutter/material.dart';
import 'dart:async';

import 'package:flutter/services.dart';
import 'package:flutter_user_agent/flutter_user_agent.dart';

void main() => runApp(MyApp());

class MyApp extends StatefulWidget {
@override
_MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
String _userAgent = '<unknown>';
String _webUserAgent = '<unknown>';

@override
void initState() {
super.initState();
initUserAgentState();
}

// Platform messages are asynchronous, so we initialize in an async method.
Future<void> initUserAgentState() async {
String userAgent, webViewUserAgent;
// Platform messages may fail, so we use a try/catch PlatformException.
try {
userAgent = await FlutterUserAgent.getPropertyAsync('userAgent');
await FlutterUserAgent.init();
webViewUserAgent = FlutterUserAgent.webViewUserAgent;
print('''
applicationVersion => ${FlutterUserAgent.getProperty('applicationVersion')}
systemName => ${FlutterUserAgent.getProperty('systemName')}
userAgent => $userAgent
webViewUserAgent => $webViewUserAgent
packageUserAgent => ${FlutterUserAgent.getProperty('packageUserAgent')}
''');
} on PlatformException {
userAgent = webViewUserAgent = '<error>';
}

// If the widget was removed from the tree while the asynchronous platform
// message was in flight, we want to discard the reply rather than calling
// setState to update our non-existent appearance.
if (!mounted) return;

setState(() {
_userAgent = userAgent;
_webUserAgent = webViewUserAgent;
});
}

@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(
title: const Text('User agent example app'),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text('Device userAgent: $_userAgent'),
Text('Web userAgent: $_webUserAgent')
],
),
),
),
);
}
}
</pre>

@@ 行86: / 行86: @@
 </pre>
-出力
+Android10エミュレーターでの出力結果
 <pre>
      systemName         => Android

@@ 行84: / 行84: @@
+   }
+}
 </pre>

@@ 行9: / 行9: @@
 https://pub.dev/packages/flutter_user_agent
 ==サンプル==
 <pre>