Can someone explain what is wrong with the code below? Cause I have the following error error image

Contact.fromMap(Map m) {
    identifier = m["identifier"];
    displayName = m["displayName"];
    givenName = m["givenName"];
    middleName = m["middleName"];
    familyName = m["familyName"];
    emails = (m["emails"] as List?)?.map((m) => Item.fromMap(m)).toList();
    phones = (m["phones"] as List?)?.map((m) => Item.fromMap(m)).toList();
    avatar = m["avatar"];
  }

String? identifier,
      displayName,
      givenName,
      middleName,
      prefix,
      suffix,
      familyName,
      company,
      jobTitle;
  String? androidAccountTypeRaw, androidAccountName;
  List<Item>? emails = [];
  List<Item>? phones = [];
  Uint8List? avatar;

Tried changing the code, but didn't help.

CodePudding user response：

What is the name of your class? It must be Contact.

CodePudding user response：

This is the whole code

import 'package:flutter_contacts/flutter_contacts.dart';
import 'dart:typed_data';
import 'package:flutter/services.dart';

import 'dart:async';
import 'package:collection/collection.dart';
import 'package:quiver/core.dart';


Future createUpdateContact(
  String name,
  String surname,
  String cellnumber,
  String email,
  String photo,
) async {
  String displayName = name   " "   surname;
  String phoneNumber = cellnumber;
  List<dynamic> phoneContacts = [];
  Uint8List bytes = (await NetworkAssetBundle(Uri.parse(photo)).load(photo))
      .buffer
      .asUint8List();

  if (await FlutterContacts.requestPermission()) {
    List<dynamic> contacts = await FlutterContacts.getContacts();  
    phoneContacts = contacts.map((c) => Contact.fromMap(c)).toList();
    
    
    try {
      dynamic contactToUpdate = matchContact(displayName, phoneNumber, phoneContacts);

      if (contactToUpdate == null) {
        final newContact = Contact()
          ..name.first = name
          ..name.last = surname
          ..phones = [Phone(cellnumber)]
          ..emails = [Email(email)]
          ..photo = bytes;
        await newContact.insert();
      } else {
        contactToUpdate.name.first = name;
        contactToUpdate.name.last = surname;
        contactToUpdate.phones = [Phone(cellnumber)];
        contactToUpdate.emails = [Email(email)];
        await contactToUpdate.update();
      }
    } catch (e) {
      print(e);
    }
  }
}

Contact matchContact(String displayName, String phoneNumber, List<dynamic> contacts) {
  return contacts.firstWhere((c) => c.displayName == displayName || c.phones.contains(phoneNumber), orElse: () => null);
}

 Contact.fromMap(Map m) {
    identifier = m["identifier"];
    displayName = m["displayName"];
    givenName = m["givenName"];
    middleName = m["middleName"];
    familyName = m["familyName"];
    emails = (m["emails"] as List?)?.map((m) => Item.fromMap(m)).toList();
    phones = (m["phones"] as List?)?.map((m) => Item.fromMap(m)).toList();
    avatar = m["avatar"];
  }

String? identifier,
      displayName,
      givenName,
      middleName,
      prefix,
      suffix,
      familyName,
      company,
      jobTitle;
  String? androidAccountTypeRaw, androidAccountName;
  List<Item>? emails = [];
  List<Item>? phones = [];
  Uint8List? avatar;