From a6c0de10f0c15d225b1a10efc7440ef7f8217d69 Mon Sep 17 00:00:00 2001
From: Sylvain Berfini <sylvain.berfini@belledonne-communications.com>
Date: Mon, 26 Oct 2020 14:58:00 +0100
Subject: [PATCH] Improved smoothness of animations to fragments with
 recyclerviews

---
 .../main/chat/fragments/ChatRoomCreationFragment.kt      | 9 +++++++++
 .../main/chat/fragments/DetailChatRoomFragment.kt        | 9 +++++++++
 .../activities/main/chat/fragments/GroupInfoFragment.kt  | 9 +++++++++
 .../activities/main/chat/fragments/ImdnFragment.kt       | 9 +++++++++
 .../main/chat/fragments/MasterChatRoomsFragment.kt       | 9 +++++++++
 .../main/contact/fragments/MasterContactsFragment.kt     | 9 +++++++++
 .../main/history/fragments/MasterCallLogsFragment.kt     | 9 +++++++++
 .../main/recordings/fragments/RecordingsFragment.kt      | 9 +++++++++
 8 files changed, 72 insertions(+)

diff --git a/app/src/main/java/org/linphone/activities/main/chat/fragments/ChatRoomCreationFragment.kt b/app/src/main/java/org/linphone/activities/main/chat/fragments/ChatRoomCreationFragment.kt
index f5f46aed9..9ea535e78 100644
--- a/app/src/main/java/org/linphone/activities/main/chat/fragments/ChatRoomCreationFragment.kt
+++ b/app/src/main/java/org/linphone/activities/main/chat/fragments/ChatRoomCreationFragment.kt
@@ -70,6 +70,15 @@ class ChatRoomCreationFragment : SecureFragment<ChatRoomCreationFragmentBinding>
         adapter.updateSecurity(viewModel.isEncrypted.value == true)
         binding.contactsList.adapter = adapter
 
+        // To ensure animation will be smooth
+        binding.contactsList.apply {
+            postponeEnterTransition()
+            viewTreeObserver.addOnPreDrawListener {
+                startPostponedEnterTransition()
+                true
+            }
+        }
+
         val layoutManager = LinearLayoutManager(activity)
         binding.contactsList.layoutManager = layoutManager
 
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 2bae06f97..6a346502d 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
@@ -121,6 +121,15 @@ class DetailChatRoomFragment : MasterFragment<ChatRoomDetailFragmentBinding, Cha
         binding.chatMessagesList.adapter = adapter
         adapter.registerAdapterDataObserver(observer)
 
+        // To ensure animation will be smooth
+        binding.chatMessagesList.apply {
+            postponeEnterTransition()
+            viewTreeObserver.addOnPreDrawListener {
+                startPostponedEnterTransition()
+                true
+            }
+        }
+
         val layoutManager = LinearLayoutManager(activity)
         layoutManager.stackFromEnd = true
         binding.chatMessagesList.layoutManager = layoutManager
diff --git a/app/src/main/java/org/linphone/activities/main/chat/fragments/GroupInfoFragment.kt b/app/src/main/java/org/linphone/activities/main/chat/fragments/GroupInfoFragment.kt
index 6368d3682..317b180ea 100644
--- a/app/src/main/java/org/linphone/activities/main/chat/fragments/GroupInfoFragment.kt
+++ b/app/src/main/java/org/linphone/activities/main/chat/fragments/GroupInfoFragment.kt
@@ -76,6 +76,15 @@ class GroupInfoFragment : SecureFragment<ChatRoomGroupInfoFragmentBinding>() {
             )
         binding.participants.adapter = adapter
 
+        // To ensure animation will be smooth
+        binding.participants.apply {
+            postponeEnterTransition()
+            viewTreeObserver.addOnPreDrawListener {
+                startPostponedEnterTransition()
+                true
+            }
+        }
+
         val layoutManager = LinearLayoutManager(activity)
         binding.participants.layoutManager = layoutManager
 
diff --git a/app/src/main/java/org/linphone/activities/main/chat/fragments/ImdnFragment.kt b/app/src/main/java/org/linphone/activities/main/chat/fragments/ImdnFragment.kt
index c0f04f962..fd83b3adb 100644
--- a/app/src/main/java/org/linphone/activities/main/chat/fragments/ImdnFragment.kt
+++ b/app/src/main/java/org/linphone/activities/main/chat/fragments/ImdnFragment.kt
@@ -81,6 +81,15 @@ class ImdnFragment : SecureFragment<ChatRoomImdnFragmentBinding>() {
         adapter = ImdnAdapter(viewLifecycleOwner)
         binding.participantsList.adapter = adapter
 
+        // To ensure animation will be smooth
+        binding.participantsList.apply {
+            postponeEnterTransition()
+            viewTreeObserver.addOnPreDrawListener {
+                startPostponedEnterTransition()
+                true
+            }
+        }
+
         val layoutManager = LinearLayoutManager(activity)
         binding.participantsList.layoutManager = layoutManager
 
diff --git a/app/src/main/java/org/linphone/activities/main/chat/fragments/MasterChatRoomsFragment.kt b/app/src/main/java/org/linphone/activities/main/chat/fragments/MasterChatRoomsFragment.kt
index 5f7088718..0602bf885 100644
--- a/app/src/main/java/org/linphone/activities/main/chat/fragments/MasterChatRoomsFragment.kt
+++ b/app/src/main/java/org/linphone/activities/main/chat/fragments/MasterChatRoomsFragment.kt
@@ -89,6 +89,15 @@ class MasterChatRoomsFragment : MasterFragment<ChatRoomMasterFragmentBinding, Ch
         adapter.registerAdapterDataObserver(observer)
         binding.chatList.adapter = adapter
 
+        // To ensure animation will be smooth
+        binding.chatList.apply {
+            postponeEnterTransition()
+            viewTreeObserver.addOnPreDrawListener {
+                startPostponedEnterTransition()
+                true
+            }
+        }
+
         val layoutManager = LinearLayoutManager(activity)
         binding.chatList.layoutManager = layoutManager
 
diff --git a/app/src/main/java/org/linphone/activities/main/contact/fragments/MasterContactsFragment.kt b/app/src/main/java/org/linphone/activities/main/contact/fragments/MasterContactsFragment.kt
index fdb00856b..643251de8 100644
--- a/app/src/main/java/org/linphone/activities/main/contact/fragments/MasterContactsFragment.kt
+++ b/app/src/main/java/org/linphone/activities/main/contact/fragments/MasterContactsFragment.kt
@@ -74,6 +74,15 @@ class MasterContactsFragment : MasterFragment<ContactMasterFragmentBinding, Cont
         _adapter = ContactsListAdapter(listSelectionViewModel, viewLifecycleOwner)
         binding.contactsList.adapter = adapter
 
+        // To ensure animation will be smooth
+        binding.contactsList.apply {
+            postponeEnterTransition()
+            viewTreeObserver.addOnPreDrawListener {
+                startPostponedEnterTransition()
+                true
+            }
+        }
+
         binding.setEditClickListener {
             if (PermissionHelper.get().hasWriteContactsPermission()) {
                 listSelectionViewModel.isEditionEnabled.value = true
diff --git a/app/src/main/java/org/linphone/activities/main/history/fragments/MasterCallLogsFragment.kt b/app/src/main/java/org/linphone/activities/main/history/fragments/MasterCallLogsFragment.kt
index 8a15dcd9c..5d4fc3269 100644
--- a/app/src/main/java/org/linphone/activities/main/history/fragments/MasterCallLogsFragment.kt
+++ b/app/src/main/java/org/linphone/activities/main/history/fragments/MasterCallLogsFragment.kt
@@ -81,6 +81,15 @@ class MasterCallLogsFragment : MasterFragment<HistoryMasterFragmentBinding, Call
         adapter.registerAdapterDataObserver(observer)
         binding.callLogsList.adapter = adapter
 
+        // To ensure animation will be smooth
+        binding.callLogsList.apply {
+            postponeEnterTransition()
+            viewTreeObserver.addOnPreDrawListener {
+                startPostponedEnterTransition()
+                true
+            }
+        }
+
         binding.setEditClickListener {
             listSelectionViewModel.isEditionEnabled.value = true
         }
diff --git a/app/src/main/java/org/linphone/activities/main/recordings/fragments/RecordingsFragment.kt b/app/src/main/java/org/linphone/activities/main/recordings/fragments/RecordingsFragment.kt
index be5bed0c6..f0efc59a5 100644
--- a/app/src/main/java/org/linphone/activities/main/recordings/fragments/RecordingsFragment.kt
+++ b/app/src/main/java/org/linphone/activities/main/recordings/fragments/RecordingsFragment.kt
@@ -57,6 +57,15 @@ class RecordingsFragment : MasterFragment<RecordingsFragmentBinding, RecordingsL
         _adapter = RecordingsListAdapter(listSelectionViewModel, viewLifecycleOwner)
         binding.recordingsList.adapter = adapter
 
+        // To ensure animation will be smooth
+        binding.recordingsList.apply {
+            postponeEnterTransition()
+            viewTreeObserver.addOnPreDrawListener {
+                startPostponedEnterTransition()
+                true
+            }
+        }
+
         val layoutManager = LinearLayoutManager(activity)
         binding.recordingsList.layoutManager = layoutManager