title: Flutter Fiebase Database get Image-url from Firebase Storage
body: <p>I want to get the image-url and safe it in the cloud Firestore from Firebase in a String. Iam able to upload the image to the FirebaseStorage but I can´t safe the Image-url as a string to upload it than to my cloud Firestore. </p>
  
  <p>Can someone help me with that problem?</p>
  
  <pre><code>&lt;!-- language: lang-dart --&gt;
  
  //upload and get image
  File imageFile;
    String imageURL;
  
    Future getImage (bool isCamera) async {
      File image;
      if(isCamera) {
        image = await ImagePicker.pickImage(source: ImageSource.camera);
      }else{
        image = await ImagePicker.pickImage(source: ImageSource.gallery);
      }
      setState(() {
        imageFile = image;
      });
    }
  
    Future uploadImage(BuildContext context) async {
      String fileName = basename(imageFile.path);
      StorageReference firebaseStorageRef = FirebaseStorage.instance.ref().child(fileName);
      StorageUploadTask uploadTask = firebaseStorageRef.putFile(imageFile);
      StorageTaskSnapshot taskSnapshot = await uploadTask.onComplete;
      setState(() {
        imageURL = await taskSnapshot.ref.getDownloadURL();
      });
    }
  
  //upload to realtime Database
  RaisedButton(
                    color: Theme.of(context).primaryColor,
                    textColor: Colors.white,
                    child: Text(isEditNote? "Update" : "Save"),
                    onPressed: () async{
                      if(_key.currentState.validate() &amp;&amp; imageFile != null){
                        try {
                          if(isEditNote){
                            uploadImage(context);
                            Book book = Book(
                              image: imageURL,
                            );
                            FirestoreService().updateBook(book);
                            Navigator.pop(context);
                          }else {
                            uploadImage(context);
                            Book book = Book(
                              image: imageURL,
                            );
                            await FirestoreService().addBook(book);
                            Navigator.pop(context);}
                        }catch(e){
                          print(e);
                        }
                      }else{
  
                      }
                    },
  </code></pre>