takePicture() Method does not work #62
Comments
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Hi can you wrap the code in a try/catch and give back the error message ? |
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I also tried to do the same and found the following error |
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also having the same issue
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I also have this issue, this is my stack trace from android: I get this calling takePicture. Let me know if there is anything else that might help. |
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I have this same issue. I found this issue on the It's not related but according to this comment you have to stop the streaming before taking a picture. There is no way of doing it through Also for some reason I can do further testing if needed. |
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here how I solved it: this is a clone of usage: take pic |
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This solution works only partly...sometime it throws: I/flutter (32399): CameraException(error, Attempt to invoke virtual method 'int android.hardware.camera2.CameraCaptureSession.capture(android.hardware.camera2.CaptureRequest, android.hardware.camera2.CameraCaptureSession$CaptureCallback, android.os.Handler)' on a null object reference) |
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instead I used this code: |
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+1 same error |
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ok i can solved this. i'm migrate this library and added some function in stop function old and take a picture liek this: |
I've got the same issue. Is it possible to expose the camera controller and release an update to the library |
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Is the problem solved？I have the same problem. |
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@MohammedAkhil |
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Is it fixed already? I got this error as well in Please have a look at the log from my try/catch block. And here is how I reproduce it. import 'dart:async';
import 'package:firebase_ml_vision/firebase_ml_vision.dart';
import 'package:flutter/material.dart';
import 'package:flutter_camera_ml_vision/flutter_camera_ml_vision.dart';
import 'package:geocoder/geocoder.dart';
import 'package:geolocator/geolocator.dart';
import 'package:intl/intl.dart';
import 'package:path/path.dart';
import 'package:path_provider/path_provider.dart';
class CameraPage extends StatefulWidget {
CameraPage({Key key}) : super(key: key);
@override
_CameraPageState createState() => _CameraPageState();
}
class _CameraPageState extends State<CameraPage> {
final _scanKey = GlobalKey<CameraMlVisionState>();
String _timeString;
Timer _timer;
List<Face> _faces;
GeolocationStatus _geolocationStatus;
Position _position;
bool _isLocationServiceEnabled;
Address _address;
CameraLensDirection cameraLensDirection = CameraLensDirection.front;
FaceDetector detector =
FirebaseVision.instance.faceDetector(FaceDetectorOptions(
enableTracking: true,
mode: FaceDetectorMode.accurate,
enableContours: true,
enableLandmarks: true,
enableClassification: true,
));
String _formatDateTime(DateTime dateTime) =>
DateFormat('HH:mm:ss').format(dateTime);
@override
void initState() {
super.initState();
_timeString = _formatDateTime(DateTime.now());
_timer = Timer.periodic(Duration(seconds: 1), (Timer t) => _getTime());
_getGeolocationStatus();
_getCurrentLocation().then((position) {
_getCurrentLocationName(position.latitude, position.longitude);
setState(() => _position = position);
});
}
@override
void dispose() {
_timer.cancel();
super.dispose();
}
void _getGeolocationStatus() async {
GeolocationStatus geolocationStatus =
await Geolocator().checkGeolocationPermissionStatus();
bool isLocationServiceEnabled =
await Geolocator().isLocationServiceEnabled();
setState(() {
_geolocationStatus = geolocationStatus;
_isLocationServiceEnabled = isLocationServiceEnabled;
});
print(_geolocationStatus);
print(_isLocationServiceEnabled);
}
Future<Position> _getCurrentLocation() async {
return await Geolocator()
.getCurrentPosition(desiredAccuracy: LocationAccuracy.best);
}
void _getTime() {
final DateTime now = DateTime.now();
final String formattedDateTime = _formatDateTime(now);
setState(() {
_timeString = formattedDateTime;
});
}
void _getCurrentLocationName(double latitude, double longitude) async {
final coordinates = Coordinates(latitude, longitude);
final addresses =
await Geocoder.local.findAddressesFromCoordinates(coordinates);
setState(() {
_address = addresses.first;
});
}
void _onSubmit() async {
final String path =
join((await getTemporaryDirectory()).path, '${DateTime.now()}.png')
.replaceAll(' ', '-')
.replaceAll(':', '');
try {
await _scanKey.currentState.takePicture(path);
} catch (e) {
print(e);
}
print(path);
}
@override
Widget build(BuildContext context) {
return Scaffold(
body: Stack(
children: <Widget>[
SizedBox.expand(
child: CameraMlVision<List<Face>>(
key: _scanKey,
cameraLensDirection: cameraLensDirection,
detector: detector.processImage,
resolution: ResolutionPreset.high,
overlayBuilder: (c) {
return CustomPaint(
painter: FaceDetectorPainter(
_scanKey.currentState.cameraValue.previewSize.flipped,
_faces,
reflection:
cameraLensDirection == CameraLensDirection.front),
);
},
onResult: (faces) {
if (faces == null || faces.isEmpty || !mounted) {
setState(() {
_faces = faces;
});
return;
}
setState(() {
_faces = []..addAll(faces);
});
},
onDispose: () {
detector.close();
},
),
),
Align(
alignment: Alignment.bottomLeft,
child: Container(
width: double.infinity,
height: 180.0,
padding: EdgeInsets.only(left: 20.0),
child: Align(
alignment: Alignment.topLeft,
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Text(
_timeString,
style: TextStyle(
color: Colors.white,
fontSize: 50.0,
fontFamily: 'Roboto',
),
),
Row(
children: <Widget>[
_address != null
? Text(
_address.addressLine.length > 45
? _address.addressLine
.substring(0, 45) +
'...'
: _address.addressLine,
style: TextStyle(color: Colors.white),
)
: Container(),
],
),
],
),
],
),
),
),
),
Align(
alignment: Alignment.bottomCenter,
child: Container(
width: double.infinity,
height: 120.0,
// color: Colors.white,
padding: EdgeInsets.all(20.0),
child: _faces != null && _faces.length > 0
? _isLocationServiceEnabled != null &&
_isLocationServiceEnabled
? _position != null && _position.mocked != true
? _faces.length > 1
? _buildMultipleFacesWarning()
: _buildCaptureButton(context)
: _buildGPSMockedWarning()
: _buildGPSWarning()
: _buildNoFaceWarning(),
),
),
],
),
);
}
Widget _buildGPSMockedWarning() {
return Align(
alignment: Alignment.center,
child: Container(
width: double.infinity,
padding: EdgeInsets.symmetric(vertical: 20.0),
decoration: BoxDecoration(
color: Colors.red,
borderRadius: BorderRadius.circular(10.0),
),
child: Text(
'Fake location detected, unable to proceed.',
style: TextStyle(color: Colors.white),
textAlign: TextAlign.center,
),
),
);
}
Widget _buildGPSWarning() {
return Align(
alignment: Alignment.center,
child: Container(
width: double.infinity,
padding: EdgeInsets.symmetric(vertical: 20.0),
decoration: BoxDecoration(
color: Colors.red,
borderRadius: BorderRadius.circular(10.0),
),
child: Text(
'Please enable you GPS!',
style: TextStyle(color: Colors.white),
textAlign: TextAlign.center,
),
),
);
}
Widget _buildNoFaceWarning() {
return Align(
alignment: Alignment.center,
child: Container(
width: double.infinity,
padding: EdgeInsets.symmetric(vertical: 20.0),
decoration: BoxDecoration(
color: Colors.red,
borderRadius: BorderRadius.circular(10.0),
),
child: Text(
'Please make sure your face is detected!',
style: TextStyle(color: Colors.white),
textAlign: TextAlign.center,
),
),
);
}
Widget _buildMultipleFacesWarning() {
return Align(
alignment: Alignment.center,
child: Container(
width: double.infinity,
padding: EdgeInsets.symmetric(vertical: 20.0),
decoration: BoxDecoration(
color: Colors.red,
borderRadius: BorderRadius.circular(10.0),
),
child: Text(
'Please do not include your friends!',
style: TextStyle(color: Colors.white),
textAlign: TextAlign.center,
),
),
);
}
Widget _buildCaptureButton(BuildContext context) {
return Align(
alignment: Alignment.center,
child: SizedBox(
width: double.infinity,
height: 60.0,
child: RaisedButton(
elevation: 0.5,
color: Theme.of(context).primaryColor,
textColor: Colors.white,
child: Icon(Icons.camera_alt),
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(10.0),
),
onPressed: () {
_onSubmit();
},
),
),
);
}
}
class FaceDetectorPainter extends CustomPainter {
FaceDetectorPainter(this.imageSize, this.faces, {this.reflection = false});
final bool reflection;
final Size imageSize;
final List<Face> faces;
@override
void paint(Canvas canvas, Size size) {
final Paint paint = Paint()
..style = PaintingStyle.stroke
..strokeWidth = 2.0
..color =
faces != null && faces.length < 2 ? Colors.grey[200] : Colors.red;
if (faces != null) {
for (Face face in faces) {
final faceRect =
_reflectionRect(reflection, face.boundingBox, imageSize.width);
canvas.drawRect(
_scaleRect(
rect: faceRect,
imageSize: imageSize,
widgetSize: size,
),
paint,
);
}
}
}
@override
bool shouldRepaint(FaceDetectorPainter oldDelegate) {
return oldDelegate.imageSize != imageSize || oldDelegate.faces != faces;
}
}
Rect _reflectionRect(bool reflection, Rect boundingBox, double width) {
if (!reflection) {
return boundingBox;
}
final centerX = width / 2;
final left = ((boundingBox.left - centerX) * -1) + centerX;
final right = ((boundingBox.right - centerX) * -1) + centerX;
return Rect.fromLTRB(left, boundingBox.top, right, boundingBox.bottom);
}
Rect _scaleRect({
@required Rect rect,
@required Size imageSize,
@required Size widgetSize,
}) {
final scaleX = widgetSize.width / imageSize.width;
final scaleY = widgetSize.height / imageSize.height;
final scaledRect = Rect.fromLTRB(
rect.left.toDouble() * scaleX,
rect.top.toDouble() * scaleY,
rect.right.toDouble() * scaleX,
rect.bottom.toDouble() * scaleY,
);
return scaledRect;
}Here is also my pubspec.yaml |
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2.2.4 I still get the same error CameraException(error, CaptureRequest contains unconfigured Input/Output Surface!) |
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@pratamatama and @chaochaox1990 could you try the branch |
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@Kleak Thanks for u reply. I tried the branch fix_take_picture as well use the method Future takePicture(String path) async { |
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@Kleak It works for me when I use |
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Thanks for your branch @Kleak |
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Will update it soon 😉 |
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Hi @Kleak sorry for late reply. I've tried your branch. It works for me too, thanks for your branch, but then I got this error:
@chaochaox1990 would you please pass me a fiddle about your fix? I really have no idea what happened here. |
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Hi all, |
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hi @Kleak , your fix does works. but sometimes it produce the error I've shown above. |
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Seems you don’t have the last version of master on the screenshot |
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Hi @Kleak , my mistake, I'm sorry for that. I have updated it to the last version of master and still got the error |
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Hi @Kleak! |
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@catalin-apostu Do the issue happen on IOS device. my android is working fine. when IOS taking picture I just get a completely black picture, I already try 6 ,6s, 7. @Kleak could you help us check many thanks |
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@chaochaox1990 This happened on an Android 10 phone. I was able to fix it meanwhile. When debugging |
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@catalin-apostu |
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Closing as should be ok since then :D feel free to reopen |
I could give you a hug man... You just saved me! |
Hi there i want to add The Capturing Image Feature on the Camera using the CameraMlVisionState
using a Global key :
onTap: () async {
final path = join(
(await getTemporaryDirectory()).path,
'${DateTime.now()}.png',
);
await _scanKey.currentState.takePicture(path);
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => DisplayPicture(imagePath: path),
),
);
},
Now the Problem is that it doesn't take a Picture and it doesn't even navigate to the DisplayPage.
But when i removed the takePicture Line , it navigated normally to the DisplayPage but of course it showed a White screen since there is no photo captured. Is there a Solution or i just wrote a wrong Code . That Code is actually similar to the Flutter Dev CooKBook Page which gives an example of capturing an image from the camera : https://flutter.dev/docs/cookbook/plugins/picture-using-camera.
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