From e641ba8632941a371fcd9dc47f81e0e54cd40892 Mon Sep 17 00:00:00 2001
From: Vishnu Mohandas <vishnumohandas@gmail.com>
Date: Fri, 8 Jan 2021 22:10:03 +0530
Subject: [PATCH] Remove listener on dispose

---
 lib/ui/gallery_app_bar_widget.dart | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/lib/ui/gallery_app_bar_widget.dart b/lib/ui/gallery_app_bar_widget.dart
index f76bc0eec..1e937dbfe 100644
--- a/lib/ui/gallery_app_bar_widget.dart
+++ b/lib/ui/gallery_app_bar_widget.dart
@@ -50,12 +50,14 @@ class GalleryAppBarWidget extends StatefulWidget
 class _GalleryAppBarWidgetState extends State<GalleryAppBarWidget> {
   final _logger = Logger("GalleryAppBar");
   StreamSubscription _userAuthEventSubscription;
+  Function() _selectedFilesListener;
 
   @override
   void initState() {
-    widget.selectedFiles.addListener(() {
+    _selectedFilesListener = () {
       setState(() {});
-    });
+    };
+    widget.selectedFiles.addListener(_selectedFilesListener);
     _userAuthEventSubscription =
         Bus.instance.on<UserAuthenticatedEvent>().listen((event) {
       setState(() {});
@@ -66,6 +68,7 @@ class _GalleryAppBarWidgetState extends State<GalleryAppBarWidget> {
   @override
   void dispose() {
     _userAuthEventSubscription.cancel();
+    widget.selectedFiles.removeListener(_selectedFilesListener);
     super.dispose();
   }