How to take picture using the camera in Flutter.

1. Add the dependencies
   dependencies:
   flutter:
   sdk: flutter
   camera:
   path_provider:
   path:
2. Make a list of all available cameras
   WidgetsFlutterBinding.ensureInitialized();
   final cameras = await availableCameras();
   final firstCamera = cameras.first;
3. Create and initialize the Cameracontroller

CameraController _cameraController;

@override
void initState() {
// TODO: implement initState
super.initState();
_cameraController = CameraController(cameras[0], ResolutionPreset.high);
cameraValue = _cameraController.initialize();
}

4. Take a picture with the CameraController

FloatingActionButton(
child: Icon(Icons.camera_alt),
onPressed: () async {
await _initializeControllerFuture;
final image = await _controller.takePicture();
},
)

5.Display the picture with an Image widget

@override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('Display the Picture')),
      body: Image.file(File(imagePath)),
    );
  }

For more detailed information please visit https://flutter.dev/docs/cookbook/plugins/picture-using-camera.