在Flutter中播放相机快门声音

Question

我想在开始/停止录制视频时播放声音。Flutter有没有一种简单的方法可以做到这一点？

或者我需要有自己的声音，并使用例如。https://pub.dev/packages/just_audio玩那个？

Answer 1

您可以在下面复制粘贴运行完整代码，完整代码已在实际设备上测试并运行良好
Fromhttps://medium.com/swlh/build-a-dog-camera-using-flutter-and-tensorflow-312022b716c6
您可以使用软件包https://pub.dev/packages/soundpool并下载快门声
相机快门声由用户Snapper4298在freesound.org上录制。https://freesound.org/people/Snapper4298/sounds/178186/
下载并将其放在项目assets文件夹中
代码片段

Soundpool _soundpool;
Future<void> main() async {
WidgetsFlutterBinding.ensureInitialized();
_soundpool = Soundpool(streamType: StreamType.notification);
runApp(MyApp());
}
...
Future<int> _soundId;
int _alarmSoundStreamId;
Future<int> _loadSound() async {
var asset = await rootBundle
.load("assets/178186__snapper4298__camera-click-nikon.wav");
return await _soundpool.load(asset);
}
Future<void> _playSound() async {
var _alarmSound = await _soundId;
_alarmSoundStreamId = await _soundpool.play(_alarmSound);
}
void _incrementCounter() async {
_playSound();
setState(() {
_counter++;
});
}
@override
void initState() {
_soundId = _loadSound();
}

全代码

import 'package:flutter/material.dart';
import 'package:flutter/widgets.dart';
import 'package:soundpool/soundpool.dart';
import 'package:flutter/services.dart';
import 'package:flutter/foundation.dart';
Soundpool _soundpool;
Future<void> main() async {
WidgetsFlutterBinding.ensureInitialized();
_soundpool = Soundpool(streamType: StreamType.notification);
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;
Future<int> _soundId;
int _alarmSoundStreamId;
Future<int> _loadSound() async {
var asset = await rootBundle
.load("assets/178186__snapper4298__camera-click-nikon.wav");
return await _soundpool.load(asset);
}
Future<void> _playSound() async {
print('play');
var _alarmSound = await _soundId;
_alarmSoundStreamId = await _soundpool.play(_alarmSound);
}
void _incrementCounter() async {
_playSound();
setState(() {
_counter++;
});
}
@override
void initState() {
_soundId = _loadSound();
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
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),
),
);
}
}

Answer 2

我需要类似的东西——拍照时的原生声音，所以我为此制作了一个插件：

https://pub.dev/packages/native_shutter_sound

示例：

import 'package:native_shutter_sound/native_shutter_sound.dart';
...
ElevatedButton(
onPressed: () {
NativeShutterSound.play();
},
child: const Text('Play Sound'),
)
...

它播放的声音与本地相机应用程序在拍照时使用的声音相同。