We would be using contacts_service plugin on pub dev as at writing the article the version is ^0.6.3, A Flutter plugin to access and manage the device’s contacts.
It both works for Android and IOS, you just have to add some permissions
Android
Add the following permissions to your AndroidManifest.xml:
<uses-permission android:name="android.permission.READ_CONTACTS" />
<uses-permission android:name="android.permission.WRITE_CONTACTS" />iOS
Set the NSContactsUsageDescription in your Info.plist file
<key>NSContactsUsageDescription</key>
<string>This app requires contacts access to function properly.</string>Then you ask for permission
Code for Importing , remember to refactor how ever it works for you
Populating the list
Incase you run into any problem , you can use the example project
https://github.com/lukasgit/flutter_contacts/blob/master/example/lib/main.dart
