Flutter动画播放按钮插件flutter_animated_play_button的使用
Flutter动画播放按钮插件flutter_animated_play_button的使用
flutter_animated_play_button
是一个用于Flutter应用程序的包,它包含了一个名为 AnimatedPlayButton
的小部件。这个小部件展示了几个动画条,表示正在播放某个项目,比如一首歌曲或播放列表。它看起来像这样:
你可以通过下面提供的链接查看基于Flutter Web构建的示例:点击这里。
要使用这个小部件,只需创建它的实例并将其放置到你的Widget树中。你可以指定其 child
或 color
属性。你可以在构建小部件时随时要求它开始或停止动画。此包是从我们的应用程序"KKBOX Kids"衍生出来的。
示例代码
以下是一个完整的示例demo,展示了如何在Flutter应用程序中使用 flutter_animated_play_button
插件。
import 'package:flutter/material.dart';
import 'package:flutter_animated_play_button/flutter_animated_play_button.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) => MaterialApp(
title: 'flutter_animated_play_button Demo',
theme: ThemeData(primarySwatch: Colors.blue),
home: MyHomePage(title: 'flutter_animated_play_button Demo'),
);
}
class MyHomePage extends StatefulWidget {
MyHomePage({
super.key,
required this.title,
});
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
var _stopped = false;
@override
Widget build(BuildContext context) => Scaffold(
appBar: AppBar(title: Text(widget.title)),
body: SafeArea(
child: Scrollbar(
child: Center(
child: SingleChildScrollView(
child: Center(
child: ConstrainedBox(
constraints: BoxConstraints(maxWidth: 600),
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment:
CrossAxisAlignment.start,
children: <Widget>[
Padding(
padding: const EdgeInsets.only(
top: 16,
left: 16,
bottom: 0,
right: 16),
child: Text('About',
style: Theme.of(context)
.textTheme
.headline6),
),
Padding(
padding: const EdgeInsets.all(16.0),
child: Text('flutter_animated_play_button provides a simple button, "AnimatedPlayButton". It has several animation bar which implies an app is playing something.\n\nOnce you are working on a media app, you may consider to adopt flutter_animated_play_button in your UI design.')),
ListTile(
title: Text(
'AnimatedPlayButton has two states. One is the animating state.'),
leading: Container(
width: 50,
height: 50,
child: AnimatedPlayButton(
color: Colors.red,
onPressed: () {},
),
),
),
ListTile(
title: Text(
'There is a paused state. It implies your app pauses playing.'),
leading: Container(
width: 50,
height: 50,
child: AnimatedPlayButton(
child: Container(),
stopped: true,
color: Colors.red,
onPressed: () {},
),
),
),
ListTile(
title: Text(
'You can change the color of the bars.'),
leading: Container(
width: 50,
height: 50,
child: AnimatedPlayButton(
child: Container(),
color: Colors.blue,
onPressed: () {},
),
),
),
Padding(
padding: const EdgeInsets.only(
top: 32,
left: 16,
bottom: 0,
right: 16),
child: Text('The Widget in Action',
style: Theme.of(context)
.textTheme
.headline6),
),
Padding(
padding: const EdgeInsets.all(16.0),
child: Row(
children: <Widget>[
Container(
width: 50,
height: 50,
child: AnimatedPlayButton(
stopped: _stopped,
color: Colors.orange,
onPressed: () {},
),
),
SizedBox(width: 10),
ElevatedButton(
child: Text('Start Animation'),
onPressed: () =>
setState(() => _stopped = false),
),
SizedBox(width: 10),
ElevatedButton(
child: Text('Stop Animation'),
onPressed: () =>
setState(() => _stopped = true),
),
],
),
),
Padding(
padding: const EdgeInsets.only(
top: 32,
left: 16,
bottom: 0,
right: 16),
child: Text('Usage',
style: Theme.of(context)
.textTheme
.headline6),
),
Padding(
padding: const EdgeInsets.all(16.0),
child: Text(
'''
Container(
width: 50,
height: 50,
child: AnimatedPlayButton(
stopped: _stopped,
color: Colors.blue,
onPressed: () {},
),
)
''',
style: TextStyle(
fontFamily: 'Courier'),
))
]))))))),
);
}
在这个示例中,我们创建了一个简单的Flutter应用程序,其中包含了一个 AnimatedPlayButton
小部件。你可以通过点击“Start Animation”和“Stop Animation”按钮来控制动画的启动和停止。此外,还展示了如何更改动画条的颜色以及如何设置子组件。希望这能帮助你在自己的项目中使用 flutter_animated_play_button
插件。
更多关于Flutter动画播放按钮插件flutter_animated_play_button的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html
更多关于Flutter动画播放按钮插件flutter_animated_play_button的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html
当然,下面是一个关于如何在Flutter项目中使用flutter_animated_play_button
插件的示例代码。这个插件提供了一个动画播放按钮,非常适合用于视频播放或任何需要动画播放按钮的场景。
首先,你需要在pubspec.yaml
文件中添加flutter_animated_play_button
依赖:
dependencies:
flutter:
sdk: flutter
flutter_animated_play_button: ^1.0.0 # 请使用最新版本号
然后运行flutter pub get
来安装依赖。
接下来,你可以在你的Flutter应用中使用这个插件。以下是一个完整的示例,展示如何在一个简单的Flutter应用中集成和使用flutter_animated_play_button
:
import 'package:flutter/material.dart';
import 'package:flutter_animated_play_button/flutter_animated_play_button.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Animated Play Button Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: Scaffold(
appBar: AppBar(
title: Text('Flutter Animated Play Button Demo'),
),
body: Center(
child: AnimatedPlayButtonExample(),
),
),
);
}
}
class AnimatedPlayButtonExample extends StatefulWidget {
@override
_AnimatedPlayButtonExampleState createState() => _AnimatedPlayButtonExampleState();
}
class _AnimatedPlayButtonExampleState extends State<AnimatedPlayButtonExample> with SingleTickerProviderStateMixin {
late AnimationController _controller;
bool _isPlaying = false;
@override
void initState() {
super.initState();
_controller = AnimationController(
duration: const Duration(seconds: 1),
vsync: this,
)..repeat(reverse: true);
}
@override
void dispose() {
_controller.dispose();
super.dispose();
}
void _togglePlay() {
setState(() {
_isPlaying = !_isPlaying;
if (_isPlaying) {
_controller.forward();
} else {
_controller.stop();
_controller.reset();
}
});
}
@override
Widget build(BuildContext context) {
return Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
SizedBox(
height: 200,
child: AnimatedPlayButton(
animation: _controller,
size: 100,
color: Colors.blue,
backgroundColor: Colors.grey.withOpacity(0.5),
borderRadius: 25,
icon: Icons.play_arrow,
iconActiveColor: Colors.white,
iconColor: Colors.white,
onPressed: _togglePlay,
),
),
SizedBox(height: 20),
Text(
_isPlaying ? 'Playing' : 'Paused',
style: TextStyle(fontSize: 20),
),
],
);
}
}
解释
-
依赖安装:
- 在
pubspec.yaml
文件中添加flutter_animated_play_button
依赖。
- 在
-
主应用结构:
MyApp
是应用的根widget,它配置了一个基本的Material应用。AnimatedPlayButtonExample
是一个StatefulWidget,它包含动画控制逻辑。
-
动画控制:
_controller
是一个AnimationController
,用于控制动画。initState
中初始化_controller
并设置动画周期为1秒,且自动反向重复。dispose
中释放_controller
资源。
-
播放/暂停逻辑:
_togglePlay
方法根据当前状态(播放或暂停)来启动或停止动画。
-
UI展示:
AnimatedPlayButton
被包裹在SizedBox
中以控制其大小。- 按钮的动画状态由
_controller
控制。 - 文本widget显示当前状态(播放或暂停)。
这个示例展示了如何使用flutter_animated_play_button
插件来创建一个带有动画效果的播放/暂停按钮,并控制其动画状态。你可以根据需要进一步自定义按钮的样式和行为。