Cant store firebase storage image url to firestore

I'm writing a code to save data in firestore, but it saves other data without image url.

Here is my code:

    import 'package:flutter/material.dart';
    import 'package:flutter_learning_app/Models/notice.dart';
    import 'package:flutter_learning_app/Services/crud.dart';
    import 'package:uuid/uuid.dart';

    class NoticeProvider with ChangeNotifier {
    final firestoreService=FirestoreService();
     String _userName;
     String _userPost;
     String _date; 
     String _photoUrl;

     var uuid=Uuid();

    //setters

     changeUserName(String value){
     _userName=value;
     notifyListeners();
    }
     changeUserPost(String value){
     _userPost=value;
     notifyListeners();
    }
     changeDate(String value){
     _date=value;
     notifyListeners();
    }
     changePhotoUrl(value){
     _photoUrl=value;
     print('$photoUrl');
     notifyListeners();
       }

      //getters

     String get userName => _userName;
     String get userPost => _userPost;
     String get date => _date;
     String get photoUrl => _photoUrl;


     saveNotice(){

     print('$photoUrl');
     print('$userName');
      var newNotice=Notice(userName:userName,userPost:userPost,
     date:date,photoUrl:photoUrl , noticeId: uuid.v4());
       firestoreService.saveNotice(newNotice);

     }



      }

I think saveNotice() function is executing before changePhotoUrl(value) function, it print value to username but it prints photourlnull, after that it prints url. I think it is the result of the print statement which is in changePhotoUrl(value).

This is the place where I get download photo url:

      File noticepic;
      Future getNotice()async{
      var tempImage = await ImagePicker.pickImage(source: ImageSource.gallery);
       setState(() {
         noticepic=tempImage ;
         });
        }
        uploadNotice()async{
       String fileName=basename(noticepic.path);
         final StorageReference firebaseStorageRef=FirebaseStorage().ref().child
      ('cisnotices/$fileName');
        final StorageUploadTask task = firebaseStorageRef.putFile(noticepic);
         await task.onComplete;
         await firebaseStorageRef.getDownloadURL().then((url) {

           noticeProvider.changePhotoUrl(url.toString());
         });
      }
     NoticeProvider noticeProvider=NoticeProvider();

This is the place where I call getimage and upload image functions, then I called saveNotice() function:

         Padding( padding: const EdgeInsets.only(left: 280),
             child: Container(
             child: IconButton(

             icon:Icon(
             Icons.add_photo_alternate
             ),

       color: Colors.grey[700],

        iconSize: 40,

        onPressed:(){

        getNotice().then((f) async => await uploadNotice());


         }

             ),
                    ),
                         ),
         SizedBox(height:10.0),

                  Container(
                    height: 30.0,
                    width: 100.0,
                    child: RaisedButton(

                      onPressed: (){
                        noticeProvider.saveNotice();

                      },

                      child: Text('Upload'),
                      color: Colors.green[400],
                    ),
                  )

This is the output:

I/flutter (19698): null
I/flutter (19698): aja yogan
I/System.out(19698): (HTTPLog)-Static: isSBSettingEnabled false
I/System.out(19698): (HTTPLog)-Static: isSBSettingEnabled false
D/NetworkManagementSocketTagger(19698): tagSocket(116) with statsTag=0xffffffff, statsUid=-1
I/System.out(19698): (HTTPLog)-Static: isSBSettingEnabled false
I/System.out(19698): (HTTPLog)-Static: isSBSettingEnabled false
I/flutter (19698): https://firebasestorage.googleapis.com/v0/b/learningapp-313e5.appspot.com/o/cisnotices%2Fimage_picker5085188822864985108.jpg?alt=media&token=8eccc3c7-14b5-4820-916e-5f1e4a67954e