updated calling kit service

callkit_service.dart

class CallingKitService {
  static final CallingKitService _instance = CallingKitService._internal();

  factory CallingKitService() {
    return _instance;
  }

  CallingKitService._internal() {
    MethodChannel('YOUR_CHANNEL_NAME').setMethodCallHandler(
      (call) async {
        if (call.method == 'CALL_ACCEPTED_INTENT') {
          final data = call.arguments;
          if (data != null) {
            _completer.complete(data);
          } else {
            _completer.completeError('No data found');
          }
        }
      },
    );
  }
  
  Completer<Map> _completer = Completer();
  
  Future<Map> getAppLaunchedData() async {
    try {
      return await _completer.future;
    } catch (e) {
      log('$_logName Either data is empty or No call received in killed state: ${e.toString()}');
      return {};
    }
  }

  static void showCallkitIncoming(...) async {
    ...
  }
}