flutter close alert dialog builder after speech recognition finished - flutter

Question

Hello friends i am working on speech recognition in flutter i made custom alert dialogue like native dialog when user click on button alert dialog appear and when user speak it show text on alert dialog my problem is that i want when user finishing his speech alert dialogue will automatically close please let me know how i can perform this task?
stt.SpeechToText speechToText = stt.SpeechToText();
bool islistening = false;
late String text = 'Example:Genesis chapter 1 verse 5';
bool complete=false;
final GlobalKey _dialogKey = GlobalKey();
ValueNotifier<bool> buttonClickedTimes =ValueNotifier(false);
_showDialog() async {
showDialog(
context:context,
barrierDismissible: true,
builder: (BuildContext context) {
return StatefulBuilder(
key: _dialogKey,
builder: (context, setState) {
return Container(
child: Dialog(
child: Padding(
padding: const EdgeInsets.all(8),
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
const AvatarGlow(
glowColor: Colors.blue,
endRadius: 80,
duration: Duration( milliseconds: 2500),
repeat: true,
showTwoGlows: true,
repeatPauseDuration: Duration( milliseconds: 150),
child: Material(
elevation: 5,
shape: CircleBorder(),
child: CircleAvatar(
backgroundColor: Colors.white,
child: Icon(Icons.mic, color: Colors.blue, size: 40,),
radius: 40,
),
),
),
Text(text),
const SizedBox(height: 10),
TextButton(
onPressed: () => Navigator.pop(context, false), // passing false
child: const Text('Cancel Voice'),
),
],
),
),
),
);
},
);
},
);
}
final GlobalKey<ScaffoldState> _scaffoldKey = GlobalKey();
void _listen() async {
if (!islistening) {
bool available = await speechToText.initialize(
onStatus: (val) => print('onStatus: $val'),
onError: (val) => print('onError: $val'),
);
if (available) {
setState(() {
islistening = true;
});
speechToText.listen(
onResult: (result) =>
setState(() {
text = result.recognizedWords;
if (_dialogKey.currentState != null && _dialogKey.currentState!.mounted && speechToText.isListening) {
_dialogKey.currentState!.setState(() {
text =result.recognizedWords;
});}
else{
if(text.contains('Genesis')){
setState(() {
String bigSentence =text;
var voice= bigSentence.split(" ");
var bookname=voice[0];
var booknumber=1;
int chapternumber=int.parse(voice[2]);
int versenumber=int.parse(voice[4]);
if(_regExp.hasMatch(chapternumber.toString())&&_regExp.hasMatch(versenumber.toString())){
Navigator.push(
context,
MaterialPageRoute(builder: (context) => Allverse(bookname, booknumber,chapternumber, versenumber)),
);
}else{
Fluttertoast.showToast(
msg: "check chapter number or versenumber",
toastLength: Toast.LENGTH_SHORT,
gravity: ToastGravity.CENTER,
backgroundColor: Colors.red,
textColor: Colors.white,
fontSize: 16.0
);
}
});
}
}
})
);
}
} else
{
setState(() => islistening = false);
speechToText.stop();
}
}