ImagePicker then Send via Post

Image Send

File _image;

Future cameraImage() async {
  var image = await ImagePicker.pickImage(
    source: ImageSource.camera,
    maxHeight: 240.0,
    maxWidth: 240.0,
  );

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

submitForm() async {
  final response = await http.post(
    uri,
    headers: {
      AuthUtils.AUTH_HEADER: _authToken
    },
    body: {
      'user_id': userId
      'photo': _image != null ? 'data:image/png;base64,' +
          base64Encode(_image.readAsBytesSync()) : '',
    },
  );

  final responseJson = json.decode(response.body);

  print(responseJson);
}