import 'package:flutter_contact/contact.dart';  

// By default, this will loop through all contacts using a page size of 20.
await Contacts.streamContacts().forEach((contact) {
    print("${contact.displayName}");
});

// You can manually adjust the buffer size
Stream<Contact> contacts = await Contacts.streamContacts(bufferSize: 50);

import 'package:flutter_contact/contact.dart';

final contacts = Contacts.listContacts();
final total = await contacts.length;

// This will fetch the page this contact belongs to, and return the contact
final contact = await contacts.get(total - 1);

while(await contacts.moveNext()) {
    final contact = await contacts.current;
}

// Import package  
import 'package:flutter_contact/contact.dart';  
  
// Get all contacts on device as a stream
Stream<Contact> contacts = await Contacts.streamContacts();  

// Get all contacts without thumbnail(faster)
Iterable<Contact> contacts = await Contacts.streamContacts(withThumbnails: false);
  
// Get contacts matching a string
Stream<Contact> johns = await Contacts.streamContacts(query : "john");

// Add a contact  
// The contact must have a firstName / lastName to be successfully added  
await Contacts.addContact(newContact);  
  
// Delete a contact
// The contact must have a valid identifier
await Contacts.deleteContact(contact);  

// Update a contact
// The contact must have a valid identifier
await Contacts.updateContact(contact);

/// Lazily fetch avatar data without caching it in the contact instance.
final contact = Contacts.getContact(contactId);
final Uint8List avatarData = await contact.getOrFetchAvatar();