From 98948ac9b6e96b1e3c7d247460ece8e4ab4a5a66 Mon Sep 17 00:00:00 2001
From: dsremo <dsremo@users.noreply.github.com>
Date: Wed, 13 May 2026 14:41:41 +0530
Subject: [PATCH] MainActivity: auto-refresh contact list on system contact
 changes

When a contact is added/edited/deleted by another app (e.g., system
contact picker, sync adapter, contact-import tools), Fossify Contacts
currently only re-reads the contact list on next onResume(). If the
user is already on the contact list when the change happens, the stale
list stays on screen until they navigate away and back.

This registers a ContentObserver on ContactsContract.Contacts.CONTENT_URI
in onResume() and unregisters in onPause(). When the observer fires,
refreshContacts(ALL_TABS_MASK) is debounced by 500ms (to coalesce
multi-row bulk operations) and executed on the main thread handler.

Behaviour outside of registered visibility (i.e., when the activity is
paused/destroyed) is unchanged - no work happens off-screen. The observer
runs only while the activity is visible.
---
 .../contacts/activities/MainActivity.kt       | 38 +++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/app/src/main/kotlin/org/fossify/contacts/activities/MainActivity.kt b/app/src/main/kotlin/org/fossify/contacts/activities/MainActivity.kt
index d26b748f5..302e0ccc7 100644
--- a/app/src/main/kotlin/org/fossify/contacts/activities/MainActivity.kt
+++ b/app/src/main/kotlin/org/fossify/contacts/activities/MainActivity.kt
@@ -4,10 +4,14 @@ import android.annotation.SuppressLint
 import android.content.ActivityNotFoundException
 import android.content.Intent
 import android.content.pm.ShortcutInfo
+import android.database.ContentObserver
 import android.graphics.drawable.ColorDrawable
 import android.graphics.drawable.Icon
 import android.graphics.drawable.LayerDrawable
 import android.os.Bundle
+import android.os.Handler
+import android.os.Looper
+import android.provider.ContactsContract
 import androidx.viewpager.widget.ViewPager
 import me.grantland.widget.AutofitHelper
 import org.fossify.commons.databases.ContactsDatabase
@@ -143,12 +147,14 @@ class MainActivity : SimpleActivity(), RefreshContactsListener {
 
         isFirstResume = false
         checkShortcuts()
+        registerContactObserver()
     }
 
     override fun onPause() {
         super.onPause()
         storeStateVariables()
         config.lastUsedViewPagerPage = binding.viewPager.currentItem
+        unregisterContactObserver()
     }
 
     override fun onDestroy() {
@@ -158,6 +164,38 @@ class MainActivity : SimpleActivity(), RefreshContactsListener {
         }
     }
 
+    private val contactObserverHandler = Handler(Looper.getMainLooper())
+    private val contactReloadRunnable = Runnable {
+        if (werePermissionsHandled) {
+            refreshContacts(ALL_TABS_MASK)
+        }
+    }
+    private var contactObserver: ContentObserver? = null
+
+    private fun registerContactObserver() {
+        unregisterContactObserver()
+        val observer = object : ContentObserver(contactObserverHandler) {
+            override fun onChange(selfChange: Boolean) {
+                contactObserverHandler.removeCallbacks(contactReloadRunnable)
+                contactObserverHandler.postDelayed(contactReloadRunnable, 500)
+            }
+        }
+        runCatching {
+            contentResolver.registerContentObserver(
+                ContactsContract.Contacts.CONTENT_URI, true, observer
+            )
+            contactObserver = observer
+        }
+    }
+
+    private fun unregisterContactObserver() {
+        contactObserverHandler.removeCallbacks(contactReloadRunnable)
+        contactObserver?.let { observer ->
+            runCatching { contentResolver.unregisterContentObserver(observer) }
+        }
+        contactObserver = null
+    }
+
     override fun onBackPressedCompat(): Boolean {
         return if (binding.mainMenu.isSearchOpen) {
             binding.mainMenu.closeSearch()