listentocontacts 0.0.2+6

Listen to changes to the user's contacts. This uses a ContentObserver on Android and a NotificationCenter observer on iOS.

example/lib/main.dart

import 'package:flutter/material.dart';
import 'dart:async';

import 'package:flutter/services.dart';
import 'package:listentocontacts/listentocontacts.dart';
import 'package:permission_handler/permission_handler.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  int changes = 0;

  Future<PermissionStatus> _getPermission() async {
    final PermissionStatus permission = await Permission.contacts.status;
    if (permission != PermissionStatus.granted &&
        permission != PermissionStatus.denied) {
      final Map<Permission, PermissionStatus> permissionStatus =
      await [Permission.contacts].request();
      return permissionStatus[Permission.contacts] ??
          PermissionStatus.undetermined;
    } else {
      return permission;
    }
  }


  @override
  void initState() {
    super.initState();
    startListening();
  }

  void startListening() async {
    print("Start Listening in Flutter");
    final PermissionStatus permissionStatus = await _getPermission();
    if (permissionStatus == PermissionStatus.granted)
    Listentocontacts().onContactsChanged.listen((event) {
      setState(() {
        changes += 1;
      });
    });

  }

  // Platform messages are asynchronous, so we initialize in an async method.

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Plugin example app'),
        ),
        body: Center(
          child:
             Container(child: Text("Listening. Nr of changes: $changes"),)

        ),
      ),
    );
  }
}