From e53801957c30d286736aeb0ab18489adf5649b22 Mon Sep 17 00:00:00 2001
From: Neil Alexander <neilalexander@users.noreply.github.com>
Date: Fri, 19 Feb 2021 13:36:39 +0000
Subject: [PATCH] Add subscribeToChanges/unsubscribeToChanges to
 VectorPreferences

---
 .../app/features/settings/VectorPreferences.kt     | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/vector/src/main/java/im/vector/app/features/settings/VectorPreferences.kt b/vector/src/main/java/im/vector/app/features/settings/VectorPreferences.kt
index d3ef36a80b..a0fe525d3e 100755
--- a/vector/src/main/java/im/vector/app/features/settings/VectorPreferences.kt
+++ b/vector/src/main/java/im/vector/app/features/settings/VectorPreferences.kt
@@ -239,6 +239,20 @@ class VectorPreferences @Inject constructor(private val context: Context) {
     }
 
     private val defaultPrefs = DefaultSharedPreferences.getInstance(context)
+    
+    /**
+     * Allow subscribing and unsubscribing to configuration changes. This is
+     * particularly useful when you need to be notified of a configuration change
+     * in a background service, e.g. for the P2P demos.
+     */
+    
+    public fun subscribeToChanges(listener: SharedPreferences.OnSharedPreferenceChangeListener) {
+        defaultPrefs.registerOnSharedPreferenceChangeListener(listener)
+    }
+
+    public fun unsubscribeToChanges(listener: SharedPreferences.OnSharedPreferenceChangeListener) {
+        defaultPrefs.unregisterOnSharedPreferenceChangeListener(listener)
+    }
 
     /**
      * Clear the preferences.