From 2ed6fa3246d99b7296ba705b5d49e1db93ba0215 Mon Sep 17 00:00:00 2001
From: Sylvain Berfini <sylvain.berfini@belledonne-communications.com>
Date: Mon, 10 Jan 2022 10:14:59 +0100
Subject: [PATCH] Prevent crash that happened once

---
 .../org/linphone/activities/GenericFragment.kt     |  4 ++++
 .../main/chat/fragments/DetailChatRoomFragment.kt  | 14 +++++++++-----
 2 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/app/src/main/java/org/linphone/activities/GenericFragment.kt b/app/src/main/java/org/linphone/activities/GenericFragment.kt
index 0ee63ec55..8cbd2a1d0 100644
--- a/app/src/main/java/org/linphone/activities/GenericFragment.kt
+++ b/app/src/main/java/org/linphone/activities/GenericFragment.kt
@@ -42,6 +42,10 @@ abstract class GenericFragment<T : ViewDataBinding> : Fragment() {
     protected val binding get() = _binding!!
     protected var useMaterialSharedAxisXForwardAnimation = true
 
+    protected fun isBindingAvailable(): Boolean {
+        return _binding != null
+    }
+
     protected val onBackPressedCallback = object : OnBackPressedCallback(true) {
         override fun handleOnBackPressed() {
             lifecycleScope.launch {
diff --git a/app/src/main/java/org/linphone/activities/main/chat/fragments/DetailChatRoomFragment.kt b/app/src/main/java/org/linphone/activities/main/chat/fragments/DetailChatRoomFragment.kt
index 7c613d3d8..e5d7745ec 100644
--- a/app/src/main/java/org/linphone/activities/main/chat/fragments/DetailChatRoomFragment.kt
+++ b/app/src/main/java/org/linphone/activities/main/chat/fragments/DetailChatRoomFragment.kt
@@ -212,11 +212,15 @@ class DetailChatRoomFragment : MasterFragment<ChatRoomDetailFragmentBinding, Cha
             .addOnGlobalLayoutListener(
                 object : OnGlobalLayoutListener {
                     override fun onGlobalLayout() {
-                        binding.chatMessagesList
-                            .viewTreeObserver
-                            .removeOnGlobalLayoutListener(this)
-                        Log.i("[Chat Room] Messages have been displayed, scrolling to first unread message if any")
-                        scrollToFirstUnreadMessageOrBottom(false)
+                        if (isBindingAvailable()) {
+                            binding.chatMessagesList
+                                .viewTreeObserver
+                                .removeOnGlobalLayoutListener(this)
+                            Log.i("[Chat Room] Messages have been displayed, scrolling to first unread message if any")
+                            scrollToFirstUnreadMessageOrBottom(false)
+                        } else {
+                            Log.e("[Chat Room] Binding not available in onGlobalLayout callback!")
+                        }
                     }
                 }
             )