【Flutter】使用flutter_sound进行录音、语音播放及录音时动画处理
https://blog.csdn.net/tianzhilan0/article/details/108492697
在这里插入图片描述
使用第三方flutter_sound:https://pub.dev/packages/flutter_sound
- flutter_sound支持多种录音格式
- flutter_sound支持多种播放格式
- flutter_sound支持音频振幅大小
- CustomPainter自定义音浪震动动画
/*
* @Descripttion:
* @version:
* @Author: lichuang
* @Date: 2020-09-07 15:44:44
* @LastEditors: lichuang
* @LastEditTime: 2020-09-08 19:07:18
*/
import 'dart:async';
import 'dart:io';
import 'package:flutter/material.dart';
import 'package:flutter_easyloading/flutter_easyloading.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:flutter_sound/flutter_sound.dart';
import 'package:path_provider/path_provider.dart';
import 'package:permission_handler/permission_handler.dart';
import 'package:intl/intl.dart' show DateFormat;
import 'package:intl/date_symbol_data_local.dart';
enum RecordPlayState {
record,
recording,
play,
playing,
}
class RecordPage extends StatefulWidget {
RecordPage({Key key}) : super(key: key);
@override
_RecordPageState createState() => _RecordPageState();
}
class _RecordPageState extends State<RecordPage> {
RecordPlayState _state = RecordPlayState.record;
StreamSubscription _recorderSubscription;
StreamSubscription _playerSubscription;
// StreamSubscription _dbPeakSubscription;
FlutterSoundRecorder flutterSound;
String _recorderTxt = '00:00:00';
// String _playerTxt = '00:00:00';
double _dbLevel = 0.0;
FlutterSoundRecorder recorderModule = FlutterSoundRecorder();
FlutterSoundPlayer playerModule = FlutterSoundPlayer();
var _path = "";
var _duration = 0.0;
var _maxLength = 59.0;
@override
void initState() {
super.initState();
init();
}
Future<void> _initializeExample(bool withUI) async {
await playerModule.closeAudioSession();
await playerModule.openAudioSession(
focus: AudioFocus.requestFocusTransient,
category: SessionCategory.playAndRecord,
mode: SessionMode.modeDefault,
device: AudioDevice.speaker);
await playerModule.setSubscriptionDuration(Duration(milliseconds: 30));
await recorderModule.setSubscriptionDuration(Duration(milliseconds: 30));
initializeDateFormatting();
}
Future<void> init() async {
recorderModule.openAudioSession(
focus: AudioFocus.requestFocusTransient,
category: SessionCategory.playAndRecord,
mode: SessionMode.modeDefault,
device: AudioDevice.speaker);
await _initializeExample(false);
if (Platform.isAndroid) {
// copyAssets();
}
}
@override
void dispose() {
super.dispose();
_cancelRecorderSubscriptions();
_cancelPlayerSubscriptions();
_releaseFlauto();
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
backgroundColor: Color(0xFF0C141F),
iconTheme: IconThemeData(color: Colors.white),
elevation: 0,
centerTitle: true,
brightness: Brightness.dark,
title: Text(
'录音',
style: TextStyle(color: Colors.white, fontSize: 18),
)),
backgroundColor: Color(0xFF0C141F),
body: Stack(
fit: StackFit.expand,
children: [
Positioned(
top: 0,
left: 0,
right: 0,
child: _timeShow(),
),
Positioned(
left: 15,
right: 15,
bottom: MediaQuery.of(context).padding.bottom + 15,
child: _actionShow())
],
),
);
}
Widget _timeShow() {
return Column(children: [
Container(
width: double.maxFinite,
height: ScreenUtil().setHeight(120),
alignment: Alignment.center,
child: Text(_recorderTxt,
style: TextStyle(fontSize: 36, color: Colors.white))),
SizedBox(height: ScreenUtil().setHeight(60)),
CustomPaint(
size: Size(double.maxFinite, 100),
painter:
LCPainter(amplitude: _dbLevel / 2, number: 30 - _dbLevel ~/ 20)),
]);
}
Widget _actionShow() {
var _width = ScreenUtil.screenWidthDp - 30;
var _height = _width * 0.8;
return Container(
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(8),
color: Color(0xFF1A283B),
),
height: _height,
child: Column(mainAxisAlignment: MainAxisAlignment.center, children: [
Row(mainAxisAlignment: MainAxisAlignment.center, children: [
Offstage(
offstage: _state == RecordPlayState.play ||
_state == RecordPlayState.playing
? false
: true,
child: InkWell(
onTap: () {
setState(() async {
_state = RecordPlayState.record;
_path = "";
_recorderTxt = "00:00:00";
_dbLevel = 0.0;
await _stopPlayer();
_state = RecordPlayState.record;
});
},
child: Container(
width: _width / 3,
child: Container(
padding: EdgeInsets.all(ScreenUtil().setWidth(30)),
child: Image.asset('assets/images/record_reset.png')),
))),
InkWell(
onTap: () {
if (_state == RecordPlayState.record) {
_startRecorder();
} else if (_state == RecordPlayState.recording) {
_stopRecorder();
} else if (_state == RecordPlayState.play) {
_startPlayer();
} else if (_state == RecordPlayState.playing) {
_pauseResumePlayer();
}
},
child: Container(
width: _width / 3,
padding: EdgeInsets.all(ScreenUtil().setWidth(10)),
child: Container(
child: Image.asset(_state == RecordPlayState.record
? "assets/images/record_start.png"
: _state == RecordPlayState.recording
? "assets/images/record_recording.png"
: _state == RecordPlayState.play
? "assets/images/record_play.png"
: "assets/images/record_playing.png")),
)),
Offstage(
offstage: _state == RecordPlayState.play ||
_state == RecordPlayState.playing
? false
: true,
child: InkWell(
onTap: () {},
child: Container(
width: _width / 3,
padding: EdgeInsets.all(ScreenUtil().setWidth(30)),
child: Container(
child:
Image.asset('assets/images/record_finish.png')),
)))
]),
SizedBox(height: 15),
Row(mainAxisAlignment: MainAxisAlignment.center, children: [
Offstage(
offstage: _state == RecordPlayState.play ||
_state == RecordPlayState.playing
? false
: true,
child: InkWell(
onTap: () {
setState(() async {
_state = RecordPlayState.record;
_path = "";
_recorderTxt = "00:00:00";
_dbLevel = 0.0;
await _stopPlayer();
_state = RecordPlayState.record;
});
},
child: Container(
width: _width / 3,
alignment: Alignment.center,
child: Text(
"重录",
style: TextStyle(fontSize: 15, color: Colors.white),
)))),
InkWell(
onTap: () {
if (_state == RecordPlayState.record) {
_startRecorder();
} else if (_state == RecordPlayState.recording) {
_stopRecorder();
} else if (_state == RecordPlayState.play) {
_startPlayer();
} else if (_state == RecordPlayState.playing) {
_pauseResumePlayer();
}
},
child: Container(
width: _width / 3,
alignment: Alignment.center,
child: Text(
_state == RecordPlayState.record
? "录音"
: _state == RecordPlayState.recording
? "结束"
: _state == RecordPlayState.play ? "播放" : "暂停",
style: TextStyle(fontSize: 15, color: Colors.white),
))),
Offstage(
offstage: _state == RecordPlayState.play ||
_state == RecordPlayState.playing
? false
: true,
child: InkWell(
onTap: () {},
child: Container(
width: _width / 3,
alignment: Alignment.center,
child: Text(
"完成",
style: TextStyle(fontSize: 15, color: Colors.white),
)))),
])
]));
}
/// 开始录音
_startRecorder() async {
try {
await PermissionHandler()
.requestPermissions([PermissionGroup.microphone]);
PermissionStatus status = await PermissionHandler()
.checkPermissionStatus(PermissionGroup.microphone);
if (status != PermissionStatus.granted) {
EasyLoading.showToast("未获取到麦克风权限");
throw RecordingPermissionException("未获取到麦克风权限");
}
print('===> 获取了权限');
Directory tempDir = await getTemporaryDirectory();
var time = DateTime.now().millisecondsSinceEpoch ~/ 1000;
String path =
'${tempDir.path}/${recorderModule.slotNo}-$time${ext[Codec.aacADTS.index]}';
print('===> 准备开始录音');
await recorderModule.startRecorder(
toFile: path,
codec: Codec.aacADTS,
bitRate: 8000,
sampleRate: 8000,
);
print('===> 开始录音');
/// 监听录音
_recorderSubscription = recorderModule.onProgress.listen((e) {
if (e != null && e.duration != null) {
DateTime date = new DateTime.fromMillisecondsSinceEpoch(
e.duration.inMilliseconds,
isUtc: true);
String txt = DateFormat('mm:ss:SS', 'en_GB').format(date);
if (date.second >= _maxLength) {
_stopRecorder();
}
setState(() {
_recorderTxt = txt.substring(0, 8);
_dbLevel = e.decibels;
print("当前振幅：$_dbLevel");
});
}
});
this.setState(() {
_state = RecordPlayState.recording;
_path = path;
print("path == $path");
});
} catch (err) {
setState(() {
_stopRecorder();
_state = RecordPlayState.record;
_cancelRecorderSubscriptions();
});
}
}
/// 结束录音
_stopRecorder() async {
try {
await recorderModule.stopRecorder();
print('stopRecorder');
_cancelRecorderSubscriptions();
_getDuration();
} catch (err) {
print('stopRecorder error: $err');
}
setState(() {
_dbLevel = 0.0;
_state = RecordPlayState.play;
});
}
/// 取消录音监听
void _cancelRecorderSubscriptions() {
if (_recorderSubscription != null) {
_recorderSubscription.cancel();
_recorderSubscription = null;
}
}
/// 取消播放监听
void _cancelPlayerSubscriptions() {
if (_playerSubscription != null) {
_playerSubscription.cancel();
_playerSubscription = null;
}
}
/// 释放录音和播放
Future<void> _releaseFlauto() async {
try {
await playerModule.closeAudioSession();
await recorderModule.closeAudioSession();
} catch (e) {
print('Released unsuccessful');
print(e);
}
}
/// 获取录音文件秒数
Future<void> _getDuration() async {
Duration d = await flutterSoundHelper.duration(_path);
_duration = d != null ? d.inMilliseconds / 1000.0 : 0.00;
print("_duration == $_duration");
var minutes = d.inMinutes;
var seconds = d.inSeconds % 60;
var millSecond = d.inMilliseconds % 1000 ~/ 10;
_recorderTxt = "";
if (minutes > 9) {
_recorderTxt = _recorderTxt + "$minutes";
} else {
_recorderTxt = _recorderTxt + "0$minutes";
}
if (seconds > 9) {
_recorderTxt = _recorderTxt + ":$seconds";
} else {
_recorderTxt = _recorderTxt + ":0$seconds";
}
if (millSecond > 9) {
_recorderTxt = _recorderTxt + ":$millSecond";
} else {
_recorderTxt = _recorderTxt + ":0$millSecond";
}
print(_recorderTxt);
setState(() {});
}
/// 开始播放
Future<void> _startPlayer() async {
try {
if (await _fileExists(_path)) {
await playerModule.startPlayer(
fromURI: _path,
codec: Codec.aacADTS,
whenFinished: () {
print('==> 结束播放');
_stopPlayer();
setState(() {});
});
} else {
EasyLoading.showToast("未找到文件路径");
throw RecordingPermissionException("未找到文件路径");
}
_cancelPlayerSubscriptions();
_playerSubscription = playerModule.onProgress.listen((e) {
if (e != null) {
// print("${e.duration} -- ${e.position} -- ${e.duration.inMilliseconds} -- ${e.position.inMilliseconds}");
// DateTime date = new DateTime.fromMillisecondsSinceEpoch(
// e.position.inMilliseconds,
// isUtc: true);
// String txt = DateFormat('mm:ss:SS', 'en_GB').format(date);
// this.setState(() {
// this._playerTxt = txt.substring(0, 8);
// });
}
});
setState(() {
_state = RecordPlayState.playing;
});
print('===> 开始播放');
} catch (err) {
print('==> 错误: $err');
}
setState(() {});
}
/// 结束播放
Future<void> _stopPlayer() async {
try {
await playerModule.stopPlayer();
print('===> 结束播放');
_cancelPlayerSubscriptions();
} catch (err) {
print('==> 错误: $err');
}
setState(() {
_state = RecordPlayState.play;
});
}
/// 暂停/继续播放
void _pauseResumePlayer() {
if (playerModule.isPlaying) {
playerModule.pausePlayer();
_state = RecordPlayState.play;
print('===> 暂停播放');
} else {
playerModule.resumePlayer();
_state = RecordPlayState.playing;
print('===> 继续播放');
}
setState(() {});
}
/// 判断文件是否存在
Future<bool> _fileExists(String path) async {
return await File(path).exists();
}
}
class LCPainter extends CustomPainter {
final double amplitude;
final int number;
LCPainter({this.amplitude = 100.0, this.number = 20});
@override
void paint(Canvas canvas, Size size) {
var centerY = 0.0;
var width = ScreenUtil.screenWidth / number;
for (var a = 0; a < 4; a++) {
var path = Path();
path.moveTo(0.0, centerY);
var i = 0;
while (i < number) {
path.cubicTo(width * i, centerY, width * (i + 1),
centerY + amplitude - a * (30), width * (i + 2), centerY);
path.cubicTo(width * (i + 2), centerY, width * (i + 3),
centerY - amplitude + a * (30), width * (i + 4), centerY);
i = i + 4;
}
canvas.drawPath(
path,
Paint()
..color = a == 0 ? Colors.blueAccent : Colors.blueGrey.withAlpha(50)
..strokeWidth = a == 0 ? 3.0 : 2.0
..maskFilter = MaskFilter.blur(
BlurStyle.solid,
5,
)
..style = PaintingStyle.stroke);
}
}
@override
bool shouldRepaint(CustomPainter oldDelegate) {
return true;
}
}
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