[i108] Expose itemAnimator for MessageListView (#4922)

* [i108] Expose itemAnimator for MessageListView * [i108] add CHANGELOG --------- Co-authored-by: kanat <>
GetStream · Aug 16, 2023 · d9352d1 · d9352d1
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -64,6 +64,7 @@
 - Improved trailing buttons customization for `MessageComposerView`. [#4915](https://github.com/GetStream/stream-chat-android/pull/4915)
 
 ### ✅ Added
+- Added `MessageListView.setCustomItemAnimator` to allow customizing the item animator used by the `MessageListView`. [#4922](https://github.com/GetStream/stream-chat-android/pull/4922)
 
 ### ⚠️ Changed
 

diff --git a/stream-chat-android-ui-components/api/stream-chat-android-ui-components.api b/stream-chat-android-ui-components/api/stream-chat-android-ui-components.api
@@ -1673,6 +1673,7 @@ public final class io/getstream/chat/android/ui/feature/messages/list/MessageLis
 	public final fun setConfirmFlagMessageHandler (Lio/getstream/chat/android/ui/feature/messages/list/MessageListView$ConfirmFlagMessageHandler;)V
 	public final fun setCopyMessageEnabled (Z)V
 	public final fun setCustomActionHandler (Lio/getstream/chat/android/ui/feature/messages/list/MessageListView$CustomActionHandler;)V
+	public final fun setCustomItemAnimator (Landroidx/recyclerview/widget/RecyclerView$ItemAnimator;)V
 	public final fun setCustomLinearLayoutManager (Landroidx/recyclerview/widget/LinearLayoutManager;)V
 	public final fun setDeleteMessageConfirmationEnabled (Z)V
 	public final fun setDeleteMessageEnabled (Z)V

diff --git a/...nts/src/main/kotlin/io/getstream/chat/android/ui/feature/messages/list/MessageListView.kt b/...nts/src/main/kotlin/io/getstream/chat/android/ui/feature/messages/list/MessageListView.kt
@@ -30,6 +30,7 @@ import androidx.core.view.isVisible
 import androidx.fragment.app.FragmentManager
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
+import androidx.recyclerview.widget.RecyclerView.ItemAnimator
 import io.getstream.chat.android.client.ChatClient
 import io.getstream.chat.android.client.utils.attachment.isGiphy
 import io.getstream.chat.android.client.utils.attachment.isImage
@@ -828,6 +829,17 @@ public class MessageListView : ConstraintLayout {
         binding.chatMessagesRV.layoutManager = layoutManager
     }
 
+    /**
+     * Set a custom item animator for MessageListView.
+     * That will handle animations involving changes to the items in this MessageListView.
+     *
+     * @param itemAnimator The ItemAnimator being set. If null, no animations will occur when changes occur
+     * to the items in this MessageListView.
+     */
+    public fun setCustomItemAnimator(itemAnimator: ItemAnimator) {
+        binding.chatMessagesRV.itemAnimator = itemAnimator
+    }
+
     /**
      * Sets the view to be displayed when the message list is loading.
      *