Connection lost - OnTap Text to play file => getting connection lost - flutter

Question

I am trying to get the user to press a record button, to then speak. His memo is recorded and then when the user tap on the Text widget displaying the name of the audio file, the file should be read so he can listen again to what he has recorded.
When I try, I am getting connection lost and the simulator crash. I do not find what is the problem in my code. I guess it is because I am still new with Flutter. Your help is welcome as I am stuck with this for several days. Many thanks.
import 'dart:io';
import 'package:audioplayers/audioplayers.dart';
import 'package:flutter/material.dart';
import 'package:flutter_audio_recorder2/flutter_audio_recorder2.dart';
import 'package:path_provider/path_provider.dart';
enum RecordingState {
UnSet,
Set,
Recording,
Stopped,
}
void main66() => runApp(MyTest());
bool isRecording = false;
class MyTest extends StatelessWidget {
const MyTest({Key key}) : super(key: key);
#override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
// backgroundColor: Colors.white,
body: HomeViewRecorder(),//HomeViewRecorder(),
),
);
}
}
class HomeViewRecorder extends StatefulWidget {
final String _title;
const HomeViewRecorder({Key key, String title}) : _title = title,
super(key: key);
#override
_HomeViewRecorderState createState() => _HomeViewRecorderState();
}
class _HomeViewRecorderState extends State<HomeViewRecorder> {
Directory appDirectory;
String records = '';
#override
void initState() {
super.initState();
getApplicationDocumentsDirectory().then((value) {
appDirectory = (value);
setState(() {
print(appDirectory);
});
});
}
void dispose() {
appDirectory.delete();
super.dispose();
}
#override
Widget build(BuildContext context) {
return Scaffold (
appBar: AppBar(
title: Text('My recorder Test')),
body: Column(
children: [
Expanded(child:
InkWell(child: RecordListView(records:records)),
),
Center(child: Record_Widget(
onSaved:
_onRecordComplete)),
]
)
);
}
_onRecordComplete() {
records ='';
appDirectory.list().listen((onData) {
if (onData.path.contains('.aac')) records=(onData.path);
}).onDone(() {
setState(() {});
});
}
}
class RecordListView extends StatefulWidget {
final String records;
const RecordListView({
Key key,
this.records,
}) : super(key: key);
#override
_RecordListViewState createState() => _RecordListViewState();
}
class _RecordListViewState extends State<RecordListView> {
int _totalDuration;
int _currentDuration;
double _completedPercentage = 0.0;
bool _isPlaying = false;
int _selectedIndex = -1;
#override
Widget build(BuildContext context){
return Column(
children: [
widget.records.isEmpty?
Text('No records yet'): InkWell(child: Text(widget.records.split("/").last+DateTime.now().toString()),
onTap: _onPlay,),
],
);
}
Future<void> _onPlay({ String filePath, int index}) async {
AudioPlayer audioPlayer = AudioPlayer();
if (!_isPlaying) {
audioPlayer.play(filePath, isLocal: true);
setState(() {
_selectedIndex = index;
_completedPercentage = 0.0;
_isPlaying = true;
});
audioPlayer.onPlayerCompletion.listen((_) {
setState(() {
_isPlaying = false;
_completedPercentage = 0.0;
});
});
audioPlayer.onDurationChanged.listen((duration) {
setState(() {
_totalDuration = duration.inMicroseconds;
});
});
audioPlayer.onAudioPositionChanged.listen((duration) {
setState(() {
_currentDuration = duration.inMicroseconds;
_completedPercentage =
_currentDuration.toDouble() / _totalDuration.toDouble();
});
});
}
}
String _getDateFromFilePath({ String filePath}) {
String fromEpoch = filePath.substring(
filePath.lastIndexOf('/') + 1, filePath.lastIndexOf('.'));
DateTime recordedDate =
DateTime.fromMillisecondsSinceEpoch(int.parse(fromEpoch));
int year = recordedDate.year;
int month = recordedDate.month;
int day = recordedDate.day;
return ('$year-$month-$day');
}
}
class Record_Widget extends StatefulWidget {
final Function onSaved;
const Record_Widget({Key key,
this.onSaved,}) : super(key: key);
#override
_Record_WidgetState createState() => _Record_WidgetState();
}
class _Record_WidgetState extends State<Record_Widget> {
Directory appDirectory;
String records = '';
RecordingState _recordingState = RecordingState.UnSet;
// Recorder properties
FlutterAudioRecorder2 audioRecorder;
#override
void initState() {
super.initState();
FlutterAudioRecorder2.hasPermissions.then((hasPermission) {
if (hasPermission) {
_recordingState = RecordingState.Set;
}
});
}
#override
void dispose() {
_recordingState = RecordingState.UnSet;
super.dispose();
}
#override
Widget build(BuildContext context) {
return Container(
padding: EdgeInsets.all(100.0),
child: _RecordOrStopButton());
}
Container _RecordOrStopButton() {
return Container(
height: 90,
width: 90,
decoration: BoxDecoration(
border: Border.all(
width: 4.0,
color: Colors.grey,
),
shape: BoxShape.circle,
),
child: Padding(
padding: EdgeInsets.all(4.0),
child: isRecording == false ?
_createRecordButton() : _createStopButton()),);
}
//Widget Button Record
Container _createRecordButton({IconData icon, Function onPressFunc}) {
return Container(child: ElevatedButton(
onPressed: () async {
await _onRecordButtonPressed();
setState(() {
_recordingState = RecordingState.Recording;
isRecording = true;
});
},
style: ButtonStyle(
shape: MaterialStateProperty.all(CircleBorder()),
padding: MaterialStateProperty.all(EdgeInsets.all(20)),
backgroundColor: MaterialStateProperty.all(
Colors.red), // <-- Button color
)));
}
//Widget Button Stop
Container _createStopButton() {
return Container(
padding: EdgeInsets.all(16),
width: 30.0,
height: 30.0,
child: ElevatedButton(
onPressed: () {
_onRecordButtonPressed();
setState(() {
isRecording = false;
});
},
style: ButtonStyle(
fixedSize: MaterialStateProperty.all(Size(10, 10)),
shape: MaterialStateProperty.all<RoundedRectangleBorder>(
RoundedRectangleBorder(
borderRadius: BorderRadius.circular(10),
side: BorderSide(color: Colors.red))),
padding: MaterialStateProperty.all(EdgeInsets.all(20)),
backgroundColor: MaterialStateProperty.all(Colors.red),
),
));
}
Future<void> _onRecordButtonPressed() async {
switch (_recordingState) {
case RecordingState.Set:
await _recordVoice();
break;
case RecordingState.Recording:
await _stopRecording();
_recordingState = RecordingState.Stopped;
break;
case RecordingState.Stopped:
await _recordVoice();
break;
case RecordingState.UnSet:
ScaffoldMessenger.of(context).hideCurrentSnackBar();
ScaffoldMessenger.of(context).showSnackBar(SnackBar(
content: Text('Please allow recording from settings.'),
));
break;
}
}
_initRecorder() async {
Directory appDirectory = await getApplicationDocumentsDirectory();
String filePath = appDirectory.path +
'/' +
DateTime.now().millisecondsSinceEpoch.toString() +
'.aac';
audioRecorder =
FlutterAudioRecorder2(filePath, audioFormat: AudioFormat.AAC);
await audioRecorder.initialized;
}
_startRecording() async {
isRecording = true;
await audioRecorder.start();
await audioRecorder.current(channel: 0);
}
_stopRecording() async {
isRecording = false;
await audioRecorder.stop();
widget.onSaved();
}
Future<void> _recordVoice() async {
final hasPermission = await FlutterAudioRecorder2.hasPermissions;
if (hasPermission ?? false) {
await _initRecorder();
await _startRecording();
_recordingState = RecordingState.Recording;
} else {
ScaffoldMessenger.of(context).hideCurrentSnackBar();
ScaffoldMessenger.of(context).showSnackBar(SnackBar(
content: Text('Please allow recording from settings.'),
));
}
}
}