block4.dart

File _cameraImage;
final picker = ImagePicker();
// This funcion will helps you to pick and Image from Camera
_pickImageFromCamera() async {
    PickedFile pickedFile = await picker.getImage(source: ImageSource.camera, imageQuality: 50);
    
    File image = File(pickedFile.path);

    setState(() {
      _cameraImage = image;    
    });
}