From 7f29131867949dce6501f89821b1b987da31a9cf Mon Sep 17 00:00:00 2001
From: surya-technovert <surya.m@technovert.com>
Date: Mon, 10 Jun 2024 16:29:25 +0530
Subject: [PATCH] Added OnLifeCycleChange for theme.

---
 lib/ui/theme/dynamic_theme_builder.dart | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/lib/ui/theme/dynamic_theme_builder.dart b/lib/ui/theme/dynamic_theme_builder.dart
index 5ee0a22212..2c1ec87b2d 100644
--- a/lib/ui/theme/dynamic_theme_builder.dart
+++ b/lib/ui/theme/dynamic_theme_builder.dart
@@ -2,6 +2,7 @@ import 'dart:ui';
 import 'package:dynamic_color/dynamic_color.dart';
 import 'package:dynamic_themes/dynamic_themes.dart';
 import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
 import 'package:flutter_localizations/flutter_localizations.dart';
 import 'package:google_fonts/google_fonts.dart';
 import 'package:revanced_manager/app/app.router.dart';
@@ -24,14 +25,26 @@ class DynamicThemeBuilder extends StatefulWidget {
 
 class _DynamicThemeBuilderState extends State<DynamicThemeBuilder>
     with WidgetsBindingObserver {
-  Brightness brightness = PlatformDispatcher.instance.platformBrightness;
+  late Brightness _currentBrightness;
 
   @override
   void initState() {
     super.initState();
+    _currentBrightness = PlatformDispatcher.instance.platformBrightness;
     WidgetsBinding.instance.addObserver(this);
   }
 
+  @override
+  void didChangeAppLifecycleState(AppLifecycleState state) {
+    if (state == AppLifecycleState.resumed) {
+      final systemBrightness = PlatformDispatcher.instance.platformBrightness;
+      if (_currentBrightness != systemBrightness) {
+        _currentBrightness = systemBrightness;
+        setState(() {});
+      }
+    }
+  }
+
   @override
   Widget build(BuildContext context) {
     return DynamicColorBuilder(
@@ -66,10 +79,10 @@ class _DynamicThemeBuilderState extends State<DynamicThemeBuilder>
         return DynamicTheme(
           themeCollection: ThemeCollection(
             themes: {
-              0: brightness == Brightness.light
+              0: _currentBrightness == Brightness.light
                   ? lightCustomTheme
                   : darkCustomTheme,
-              1: brightness == Brightness.light
+              1: _currentBrightness == Brightness.light
                   ? lightDynamicTheme
                   : darkDynamicTheme,
               2: lightCustomTheme,