Dismissing AlertDialog in Flutter

I have simple Flutter app with list of items that are loaded from Firebase database (Cloud Firestore).



As you can see - there is button for adding items and each item can be deleted or edited. When I press edit button for selected item, AlertDialog with TextField appears, in this TextField user can see current item name and edit it. I have problems only with dismissing dialog after editing.

new IconButton(
icon: new Icon(Icons.edit, color: Colors.white),
onPressed: (){ showItemUpdateDialog(context, document); }
)
.......


void showItemUpdateDialog(BuildContext context, DocumentSnapshot item) {

String itemName = "";
var textContoller = new TextEditingController();
textContoller.text = item['name'];

var dialog = new AlertDialog(
title: new Text("item name"),
content: new TextField(
controller: textContoller,
onChanged: (value) {newName = value;},
),
actions: <Widget>[
new FlatButton(
child: Text("cancel"),
onPressed: (){
Navigator.pop(context);
},
),
new FlatButton(
child: Text("Update"),
onPressed: () {
updateItemOnServer(item, newName);
Navigator.pop(context);
}
)
],
);

showDialog(context: context, child: dialog);
}


Value is updating correctly but AlertDialog is not dismissed. Error code is below. I think that it is due to that is was called by item that was modified and updated from server.


flutter: The following assertion was thrown while handling a gesture:
flutter: Looking up a deactivated widget's ancestor is unsafe.
flutter: At this point the state of the widget's element tree is no
longer stable. To safely refer to a flutter: widget's ancestor in its
dispose() method, save a reference to the ancestor by calling flutter:
inheritFromWidgetOfExactType() in the widget's didChangeDependencies()
method.


With the latest Flutter use:

Navigator.of(context).pop();


instead of

Navigator.pop(context);


For some reason it pops twice from the stack when popping Dialog

Do let me know if this solves the problem!

Try this,

Navigator.of(context, rootNavigator: true).pop(),


Try This,

Navigator.popUntil(context, ModalRoute.withName('/login'));