From 3334730a619256af1c27e93b572fd3942b665808 Mon Sep 17 00:00:00 2001
From: Ikram Gabiyev <gabiyev@google.com>
Date: Mon, 20 Mar 2023 17:33:48 +0000
Subject: [PATCH] Create an animation for instance filtering

Create an animation for multi instance filtering
demo in recents view.

Bug: 253520408
Bug: 276488398
Test: manually reproduce the steps in the bug

Change-Id: I9f5b4a29f18101b8e33d4e43514dcd8a6c49a7a9
---
 .../android/quickstep/views/RecentsView.java  | 28 ++++++++++++++++---
 1 file changed, 24 insertions(+), 4 deletions(-)

diff --git a/quickstep/src/com/android/quickstep/views/RecentsView.java b/quickstep/src/com/android/quickstep/views/RecentsView.java
index 9a25e9ca64..7989bb0b65 100644
--- a/quickstep/src/com/android/quickstep/views/RecentsView.java
+++ b/quickstep/src/com/android/quickstep/views/RecentsView.java
@@ -185,6 +185,7 @@ import com.android.quickstep.util.AnimUtils;
 import com.android.quickstep.util.DesktopTask;
 import com.android.quickstep.util.GroupTask;
 import com.android.quickstep.util.LayoutUtils;
+import com.android.quickstep.util.RecentsAtomicAnimationFactory;
 import com.android.quickstep.util.RecentsOrientedState;
 import com.android.quickstep.util.SplitAnimationController.Companion.SplitAnimInitProps;
 import com.android.quickstep.util.SplitAnimationTimings;
@@ -801,8 +802,29 @@ public abstract class RecentsView<ACTIVITY_TYPE extends StatefulActivity<STATE_T
 
         // if multi-instance feature is enabled
         if (FeatureFlags.ENABLE_MULTI_INSTANCE.get()) {
-            // invalidate the current list of tasks if filter changes
-            mFilterState.setOnFilterUpdatedListener(this::invalidateTaskList);
+            // invalidate the current list of tasks if filter changes with a fading in/out animation
+            mFilterState.setOnFilterUpdatedListener(() -> {
+                Animator animatorFade = mActivity.getStateManager().createStateElementAnimation(
+                        RecentsAtomicAnimationFactory.INDEX_RECENTS_FADE_ANIM, 1f, 0f);
+                Animator animatorAppear = mActivity.getStateManager().createStateElementAnimation(
+                        RecentsAtomicAnimationFactory.INDEX_RECENTS_FADE_ANIM, 0f, 1f);
+                animatorFade.addListener(new AnimatorListenerAdapter() {
+                    @Override
+                    public void onAnimationEnd(@NonNull Animator animation) {
+                        RecentsView.this.invalidateTaskList();
+                        updateClearAllFunction();
+                        reloadIfNeeded();
+                        if (mPendingAnimation != null) {
+                            mPendingAnimation.addEndListener(success -> {
+                                animatorAppear.start();
+                            });
+                        } else {
+                            animatorAppear.start();
+                        }
+                    }
+                });
+                animatorFade.start();
+            });
         }
         // make sure filter is turned off by default
         mFilterState.setFilterBy(null);
@@ -821,8 +843,6 @@ public abstract class RecentsView<ACTIVITY_TYPE extends StatefulActivity<STATE_T
      */
     public void setAndApplyFilter(@Nullable String packageName) {
         mFilterState.setFilterBy(packageName);
-        updateClearAllFunction();
-        reloadIfNeeded();
     }
 
     /**