Implement default exit animation for splash screen.(9/N)

Implement default exit animation on the view of splash screen, there
will be a two layers switch happen when playing exit animation. For
the detail please reference
go/improved_app_launch_animations and go/app-startup

Note: For this version we skip shift-up animation, need to fix the
flicker test so we can enable it.
Note2: Fix the possible missing splash screen view issue, but could
make the first window draw slower, keep tracking.

Bug: 73289295
Test: build/flash
Test: check splash screen starting window.
Test: atest StartingSurfaceDrawerTests ShellTaskOrganizerTests
WindowOrganizerTests SplashscreenTests

Change-Id: I796811d010ac70f256169dd03d5e05ef0ed79d28

23 files changed, 596 insertions, 196 deletions

diff --git a/core/api/test-current.txt b/core/api/test-current.txt
index 86949e05ba71..bf455cdc7799 100644
--- a/core/api/test-current.txt
+++ b/core/api/test-current.txt
@@ -2907,7 +2907,7 @@ package android.window {
     method @BinderThread public void onTaskInfoChanged(@NonNull android.app.ActivityManager.RunningTaskInfo);
     method @BinderThread public void onTaskVanished(@NonNull android.app.ActivityManager.RunningTaskInfo);
     method @CallSuper @NonNull @RequiresPermission(android.Manifest.permission.MANAGE_ACTIVITY_TASKS) public java.util.List<android.window.TaskAppearedInfo> registerOrganizer();
-    method @BinderThread public void removeStartingWindow(int);
+    method @BinderThread public void removeStartingWindow(int, @Nullable android.view.SurfaceControl, @Nullable android.graphics.Rect, boolean);
     method @RequiresPermission(android.Manifest.permission.MANAGE_ACTIVITY_TASKS) public void setInterceptBackPressedOnTaskRoot(@NonNull android.window.WindowContainerToken, boolean);
     method @CallSuper @RequiresPermission(android.Manifest.permission.MANAGE_ACTIVITY_TASKS) public void unregisterOrganizer();
   }
diff --git a/core/java/android/window/ITaskOrganizer.aidl b/core/java/android/window/ITaskOrganizer.aidl
index 8f541d0bd194..3eb35c2c5e8a 100644
--- a/core/java/android/window/ITaskOrganizer.aidl
+++ b/core/java/android/window/ITaskOrganizer.aidl
@@ -18,6 +18,7 @@ package android.window;
 
 import android.view.SurfaceControl;
 import android.app.ActivityManager;
+import android.graphics.Rect;
 import android.window.StartingWindowInfo;
 import android.window.WindowContainerToken;
 
@@ -38,8 +39,12 @@ oneway interface ITaskOrganizer {
 
     /**
      * Called when the Task want to remove the starting window.
+     * @param leash A persistent leash for the top window in this task.
+     * @param frame Window frame of the top window.
+     * @param playRevealAnimation Play vanish animation.
      */
-    void removeStartingWindow(int taskId);
+    void removeStartingWindow(int taskId, in SurfaceControl leash, in Rect frame,
+            in boolean playRevealAnimation);
 
     /**
      * Called when the Task want to copy the splash screen.
diff --git a/core/java/android/window/SplashScreenView.java b/core/java/android/window/SplashScreenView.java
index 35ccfca101d3..da445b8b9f33 100644
--- a/core/java/android/window/SplashScreenView.java
+++ b/core/java/android/window/SplashScreenView.java
@@ -46,6 +46,8 @@ import android.widget.FrameLayout;
 import com.android.internal.R;
 import com.android.internal.policy.DecorView;
 
+import java.util.function.Consumer;
+
 /**
  * <p>The view which allows an activity to customize its splash screen exit animation.</p>
  *
@@ -77,7 +79,8 @@ public final class SplashScreenView extends FrameLayout {
 
     private Animatable mAnimatableIcon;
     private ValueAnimator mAnimator;
-
+    private Runnable mAnimationFinishListener;
+    private Consumer<Canvas> mOnDrawCallback;
     // cache original window and status
     private Window mWindow;
     private boolean mDrawBarBackground;
@@ -85,7 +88,7 @@ public final class SplashScreenView extends FrameLayout {
     private int mNavigationBarColor;
 
     /**
-     * Internal builder to create a SplashScreenWindowView object.
+     * Internal builder to create a SplashScreenView object.
      * @hide
      */
     public static class Builder {
@@ -391,7 +394,7 @@ public final class SplashScreenView extends FrameLayout {
      * Get the initial background color of this view.
      * @hide
      */
-    @ColorInt int getInitBackgroundColor() {
+    public @ColorInt int getInitBackgroundColor() {
         return mInitBackgroundColor;
     }
 
diff --git a/core/java/android/window/TaskOrganizer.java b/core/java/android/window/TaskOrganizer.java
index 04020ec3ee8a..3340cf4fb707 100644
--- a/core/java/android/window/TaskOrganizer.java
+++ b/core/java/android/window/TaskOrganizer.java
@@ -24,6 +24,7 @@ import android.annotation.RequiresPermission;
 import android.annotation.SuppressLint;
 import android.annotation.TestApi;
 import android.app.ActivityManager;
+import android.graphics.Rect;
 import android.os.IBinder;
 import android.os.RemoteException;
 import android.view.SurfaceControl;
@@ -100,9 +101,14 @@ public class TaskOrganizer extends WindowOrganizer {
 
     /**
      * Called when the Task want to remove the starting window.
+     * @param leash A persistent leash for the top window in this task. Release it once exit
+     *              animation has finished.
+     * @param frame Window frame of the top window.
+     * @param playRevealAnimation Play vanish animation.
      */
     @BinderThread
-    public void removeStartingWindow(int taskId) {}
+    public void removeStartingWindow(int taskId, @Nullable SurfaceControl leash,
+            @Nullable Rect frame, boolean playRevealAnimation) {}
 
     /**
      * Called when the Task want to copy the splash screen.
@@ -217,15 +223,16 @@ public class TaskOrganizer extends WindowOrganizer {
 
     private final ITaskOrganizer mInterface = new ITaskOrganizer.Stub() {
         @Override
-
         public void addStartingWindow(StartingWindowInfo windowInfo,
                 IBinder appToken) {
             mExecutor.execute(() -> TaskOrganizer.this.addStartingWindow(windowInfo, appToken));
         }
 
         @Override
-        public void removeStartingWindow(int taskId) {
-            mExecutor.execute(() -> TaskOrganizer.this.removeStartingWindow(taskId));
+        public void removeStartingWindow(int taskId, SurfaceControl leash, Rect frame,
+                boolean playRevealAnimation) {
+            mExecutor.execute(() -> TaskOrganizer.this.removeStartingWindow(taskId, leash, frame,
+                    playRevealAnimation));
         }
 
         @Override
diff --git a/libs/WindowManager/Shell/res/values/config.xml b/libs/WindowManager/Shell/res/values/config.xml
index 24198659e15d..c2f591b9d7af 100644
--- a/libs/WindowManager/Shell/res/values/config.xml
+++ b/libs/WindowManager/Shell/res/values/config.xml
@@ -51,4 +51,10 @@
 
     <!-- maximum animation duration for the icon when entering the starting window -->
     <integer name="max_starting_window_intro_icon_anim_duration">1000</integer>
+
+    <!-- Animation duration when exit starting window: icon going away -->
+    <integer name="starting_window_icon_exit_anim_duration">166</integer>
+
+    <!-- Animation duration when exit starting window: reveal app -->
+    <integer name="starting_window_app_reveal_anim_duration">333</integer>
 </resources>
diff --git a/libs/WindowManager/Shell/res/values/dimen.xml b/libs/WindowManager/Shell/res/values/dimen.xml
index 75bed3777a9d..3ced8d3ec6e7 100644
--- a/libs/WindowManager/Shell/res/values/dimen.xml
+++ b/libs/WindowManager/Shell/res/values/dimen.xml
@@ -188,4 +188,13 @@
 
     <!-- The height of the brand image on staring surface. -->
     <dimen name="starting_surface_brand_image_height">80dp</dimen>
+
+    <!-- The length of the shift of main window when exit starting window. -->
+    <dimen name="starting_surface_exit_animation_window_shift_length">20dp</dimen>
+
+    <!-- The distance of the shift icon when normal exit starting window. -->
+    <dimen name="starting_surface_normal_exit_icon_distance">120dp</dimen>
+
+    <!-- The distance of the shift icon when early exit starting window. -->
+    <dimen name="starting_surface_early_exit_icon_distance">32dp</dimen>
 </resources>
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/ShellTaskOrganizer.java b/libs/WindowManager/Shell/src/com/android/wm/shell/ShellTaskOrganizer.java
index cb04bd7ce02b..fcb53cd890b7 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/ShellTaskOrganizer.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/ShellTaskOrganizer.java
@@ -31,6 +31,7 @@ import android.app.ActivityManager.RunningTaskInfo;
 import android.app.TaskInfo;
 import android.content.Context;
 import android.content.LocusId;
+import android.graphics.Rect;
 import android.os.Binder;
 import android.os.IBinder;
 import android.util.ArrayMap;
@@ -307,9 +308,10 @@ public class ShellTaskOrganizer extends TaskOrganizer {
     }
 
     @Override
-    public void removeStartingWindow(int taskId) {
+    public void removeStartingWindow(int taskId, SurfaceControl leash, Rect frame,
+            boolean playRevealAnimation) {
         if (mStartingSurface != null) {
-            mStartingSurface.removeStartingWindow(taskId);
+            mStartingSurface.removeStartingWindow(taskId, leash, frame, playRevealAnimation);
         }
     }
 
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/startingsurface/SplashScreenExitAnimation.java b/libs/WindowManager/Shell/src/com/android/wm/shell/startingsurface/SplashScreenExitAnimation.java
new file mode 100644
index 000000000000..5bc2afd11fe8
--- /dev/null
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/startingsurface/SplashScreenExitAnimation.java
@@ -0,0 +1,328 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.wm.shell.startingsurface;
+
+import static android.view.View.GONE;
+
+import android.animation.Animator;
+import android.animation.ValueAnimator;
+import android.graphics.BlendMode;
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.Matrix;
+import android.graphics.Paint;
+import android.graphics.Point;
+import android.graphics.RadialGradient;
+import android.graphics.Rect;
+import android.graphics.Shader;
+import android.util.Slog;
+import android.view.SurfaceControl;
+import android.view.View;
+import android.view.ViewGroup;
+import android.view.WindowManager;
+import android.view.animation.AlphaAnimation;
+import android.view.animation.Animation;
+import android.view.animation.AnimationSet;
+import android.view.animation.Interpolator;
+import android.view.animation.PathInterpolator;
+import android.view.animation.Transformation;
+import android.view.animation.TranslateYAnimation;
+import android.window.SplashScreenView;
+
+import com.android.wm.shell.common.TransactionPool;
+
+/**
+ * Default animation for exiting the splash screen window.
+ * @hide
+ */
+public class SplashScreenExitAnimation implements Animator.AnimatorListener {
+    private static final boolean DEBUG_EXIT_ANIMATION = false;
+    private static final boolean DEBUG_EXIT_ANIMATION_BLEND = false;
+    private static final String TAG = StartingSurfaceDrawer.TAG;
+
+    private static final Interpolator ICON_EXIT_INTERPOLATOR = new PathInterpolator(1f, 0f, 1f, 1f);
+    private static final Interpolator APP_EXIT_INTERPOLATOR = new PathInterpolator(0f, 0f, 0f, 1f);
+
+    private static final int EXTRA_REVEAL_DELAY = 133;
+    private final Matrix mTmpTransform = new Matrix();
+    private final float[] mTmpFloat9 = new float[9];
+    private SurfaceControl mFirstWindowSurface;
+    private final Rect mFirstWindowFrame = new Rect();
+    private final SplashScreenView mSplashScreenView;
+    private final int mMainWindowShiftLength;
+    private final int mIconShiftLength;
+    private final int mAppDuration;
+    private final int mIconDuration;
+    private final TransactionPool mTransactionPool;
+
+    private ValueAnimator mMainAnimator;
+    private Animation mShiftUpAnimation;
+    private AnimationSet mIconAnimationSet;
+    private Runnable mFinishCallback;
+
+    SplashScreenExitAnimation(SplashScreenView view, SurfaceControl leash, Rect frame,
+            int appDuration, int iconDuration, int mainWindowShiftLength, int iconShiftLength,
+            TransactionPool pool, Runnable handleFinish) {
+        mSplashScreenView = view;
+        mFirstWindowSurface = leash;
+        if (frame != null) {
+            mFirstWindowFrame.set(frame);
+        }
+        mAppDuration = appDuration;
+        mIconDuration = iconDuration;
+        mMainWindowShiftLength = mainWindowShiftLength;
+        mIconShiftLength = iconShiftLength;
+        mFinishCallback = handleFinish;
+        mTransactionPool = pool;
+    }
+
+    void prepareAnimations() {
+        prepareRevealAnimation();
+        prepareShiftAnimation();
+    }
+
+    void startAnimations() {
+        if (mIconAnimationSet != null) {
+            mIconAnimationSet.start();
+        }
+        if (mMainAnimator != null) {
+            mMainAnimator.start();
+        }
+        if (mShiftUpAnimation != null) {
+            mShiftUpAnimation.start();
+        }
+    }
+
+    // reveal splash screen, shift up main window
+    private void prepareRevealAnimation() {
+        // splash screen
+        mMainAnimator = ValueAnimator.ofFloat(0f, 1f);
+        mMainAnimator.setDuration(mAppDuration);
+        mMainAnimator.setInterpolator(APP_EXIT_INTERPOLATOR);
+        mMainAnimator.addListener(this);
+
+        final int startDelay = mIconDuration + EXTRA_REVEAL_DELAY;
+        final float transparentRatio = 0.95f;
+        final int globalHeight = mSplashScreenView.getHeight();
+        final int verticalCircleCenter = 0;
+        final int finalVerticalLength = globalHeight - verticalCircleCenter;
+        final int halfWidth = mSplashScreenView.getWidth() / 2;
+        final int endRadius = (int) (0.5 + (1f / transparentRatio * (int)
+                Math.sqrt(finalVerticalLength * finalVerticalLength + halfWidth * halfWidth)));
+        final RadialVanishAnimation radialVanishAnimation = new RadialVanishAnimation(
+                mSplashScreenView, mMainAnimator);
+        radialVanishAnimation.setCircleCenter(halfWidth, verticalCircleCenter);
+        radialVanishAnimation.setRadius(0/* initRadius */, endRadius);
+        final int[] colors = {Color.TRANSPARENT, Color.TRANSPARENT, Color.WHITE};
+        final float[] stops = {0f, transparentRatio, 1f};
+        radialVanishAnimation.setRadialPaintParam(colors, stops);
+        radialVanishAnimation.setReady();
+        mMainAnimator.setStartDelay(startDelay);
+
+        if (mFirstWindowSurface != null) {
+            // shift up main window
+            View occludeHoleView = new View(mSplashScreenView.getContext());
+            if (DEBUG_EXIT_ANIMATION_BLEND) {
+                occludeHoleView.setBackgroundColor(Color.BLUE);
+            } else {
+                occludeHoleView.setBackgroundColor(mSplashScreenView.getInitBackgroundColor());
+            }
+            final ViewGroup.LayoutParams params = new ViewGroup.LayoutParams(
+                    WindowManager.LayoutParams.MATCH_PARENT, mMainWindowShiftLength);
+            mSplashScreenView.addView(occludeHoleView, params);
+
+            mShiftUpAnimation = new ShiftUpAnimation(0, -mMainWindowShiftLength);
+            mShiftUpAnimation.setDuration(mAppDuration);
+            mShiftUpAnimation.setInterpolator(APP_EXIT_INTERPOLATOR);
+            mShiftUpAnimation.setStartOffset(startDelay);
+
+            occludeHoleView.setAnimation(mShiftUpAnimation);
+        }
+    }
+
+    // shift down icon and branding view
+    private void prepareShiftAnimation() {
+        final View iconView = mSplashScreenView.getIconView();
+        if (iconView == null) {
+            return;
+        }
+        if (mIconShiftLength > 0) {
+            mIconAnimationSet = new AnimationSet(true /* shareInterpolator */);
+            if (DEBUG_EXIT_ANIMATION) {
+                Slog.v(TAG, "first exit animation, shift length: " + mIconShiftLength);
+            }
+            mIconAnimationSet.addAnimation(new TranslateYAnimation(0, mIconShiftLength));
+            mIconAnimationSet.addAnimation(new AlphaAnimation(1, 0));
+            mIconAnimationSet.setAnimationListener(new Animation.AnimationListener() {
+                @Override
+                public void onAnimationStart(Animation animation) {
+
+                }
+
+                @Override
+                public void onAnimationEnd(Animation animation) {
+                    if (DEBUG_EXIT_ANIMATION) {
+                        Slog.v(TAG, "first exit animation finished");
+                    }
+                    iconView.post(() -> iconView.setVisibility(GONE));
+                }
+
+                @Override
+                public void onAnimationRepeat(Animation animation) {
+                    // ignore
+                }
+            });
+            mIconAnimationSet.setDuration(mIconDuration);
+            mIconAnimationSet.setInterpolator(ICON_EXIT_INTERPOLATOR);
+            iconView.setAnimation(mIconAnimationSet);
+            final View brandingView = mSplashScreenView.getBrandingView();
+            if (brandingView != null) {
+                brandingView.setAnimation(mIconAnimationSet);
+            }
+        }
+    }
+
+    private static class RadialVanishAnimation extends View {
+        private SplashScreenView mView;
+        private int mInitRadius;
+        private int mFinishRadius;
+        private boolean mReady;
+
+        private final Point mCircleCenter = new Point();
+        private final Matrix mVanishMatrix = new Matrix();
+        private final Paint mVanishPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+
+        RadialVanishAnimation(SplashScreenView target, ValueAnimator animator) {
+            super(target.getContext());
+            mView = target;
+            animator.addUpdateListener((animation) -> {
+                if (mVanishPaint.getShader() == null) {
+                    return;
+                }
+                final float value = (float) animation.getAnimatedValue();
+                final float scale = (mFinishRadius - mInitRadius) * value + mInitRadius;
+                mVanishMatrix.setScale(scale, scale);
+                mVanishMatrix.postTranslate(mCircleCenter.x, mCircleCenter.y);
+                mVanishPaint.getShader().setLocalMatrix(mVanishMatrix);
+                mView.postInvalidate();
+            });
+            mView.addView(this);
+        }
+
+        void setRadius(int initRadius, int finishRadius) {
+            if (DEBUG_EXIT_ANIMATION) {
+                Slog.v(TAG, "RadialVanishAnimation setRadius init: " + initRadius
+                        + " final " + finishRadius);
+            }
+            mInitRadius = initRadius;
+            mFinishRadius = finishRadius;
+        }
+
+        void setCircleCenter(int x, int y) {
+            if (DEBUG_EXIT_ANIMATION) {
+                Slog.v(TAG, "RadialVanishAnimation setCircleCenter x: " + x + " y " + y);
+            }
+            mCircleCenter.set(x, y);
+        }
+
+        void setRadialPaintParam(int[] colors, float[] stops) {
+            // setup gradient shader
+            final RadialGradient rShader =
+                    new RadialGradient(0, 0, 1, colors, stops, Shader.TileMode.CLAMP);
+            mVanishPaint.setShader(rShader);
+            if (!DEBUG_EXIT_ANIMATION_BLEND) {
+                mVanishPaint.setBlendMode(BlendMode.MODULATE);
+            }
+        }
+
+        void setReady() {
+            mReady = true;
+        }
+
+        @Override
+        protected void onDraw(Canvas canvas) {
+            super.onDraw(canvas);
+            if (mReady) {
+                canvas.drawRect(0, 0, mView.getWidth(), mView.getHeight(), mVanishPaint);
+            }
+        }
+    }
+
+    private final class ShiftUpAnimation extends TranslateYAnimation {
+        ShiftUpAnimation(float fromYDelta, float toYDelta) {
+            super(fromYDelta, toYDelta);
+        }
+
+        @Override
+        protected void applyTransformation(float interpolatedTime, Transformation t) {
+            super.applyTransformation(interpolatedTime, t);
+
+            if (mFirstWindowSurface == null) {
+                return;
+            }
+            mTmpTransform.set(t.getMatrix());
+            final SurfaceControl.Transaction tx = mTransactionPool.acquire();
+            mTmpTransform.postTranslate(mFirstWindowFrame.left,
+                    mFirstWindowFrame.top + mMainWindowShiftLength);
+            tx.setMatrix(mFirstWindowSurface, mTmpTransform, mTmpFloat9);
+            // TODO set the vsyncId to ensure the transaction doesn't get applied too early.
+            //  Additionally, do you want to have this synchronized with your view animations?
+            //  If so, you'll need to use SyncRtSurfaceTransactionApplier
+            tx.apply();
+            mTransactionPool.release(tx);
+        }
+    }
+
+    private void reset() {
+        if (DEBUG_EXIT_ANIMATION) {
+            Slog.v(TAG, "vanish animation finished");
+        }
+        mSplashScreenView.post(() -> {
+            mSplashScreenView.setVisibility(GONE);
+            if (mFinishCallback != null) {
+                mFinishCallback.run();
+                mFinishCallback = null;
+            }
+        });
+        if (mFirstWindowSurface != null) {
+            final SurfaceControl.Transaction tx = mTransactionPool.acquire();
+            tx.setWindowCrop(mFirstWindowSurface, null);
+            tx.apply();
+            mFirstWindowSurface.release();
+            mFirstWindowSurface = null;
+        }
+    }
+
+    @Override
+    public void onAnimationStart(Animator animation) {
+        // ignore
+    }
+
+    @Override
+    public void onAnimationEnd(Animator animation) {
+        reset();
+    }
+
+    @Override
+    public void onAnimationCancel(Animator animation) {
+        reset();
+    }
+
+    @Override
+    public void onAnimationRepeat(Animator animation) {
+        // ignore
+    }
+}
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/startingsurface/SplashscreenContentDrawer.java b/libs/WindowManager/Shell/src/com/android/wm/shell/startingsurface/SplashscreenContentDrawer.java
index 2973b5080ae6..3f9c2717731a 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/startingsurface/SplashscreenContentDrawer.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/startingsurface/SplashscreenContentDrawer.java
@@ -31,12 +31,14 @@ import android.graphics.drawable.Drawable;
 import android.graphics.drawable.LayerDrawable;
 import android.os.Build;
 import android.util.Slog;
+import android.view.SurfaceControl;
 import android.window.SplashScreenView;
 
 import com.android.internal.R;
 import com.android.internal.graphics.palette.Palette;
 import com.android.internal.graphics.palette.Quantizer;
 import com.android.internal.graphics.palette.VariationalKMeansQuantizer;
+import com.android.wm.shell.common.TransactionPool;
 
 import java.util.List;
 
@@ -56,15 +58,25 @@ public class SplashscreenContentDrawer {
     // also 108*108 pixels, then do not enlarge this icon if only need to show foreground icon.
     private static final float ENLARGE_FOREGROUND_ICON_THRESHOLD = (72f * 72f) / (108f * 108f);
     private final Context mContext;
-    private final int mMaxIconAnimationDuration;
+    private final int mMaxAnimatableIconDuration;
 
     private int mIconSize;
     private int mBrandingImageWidth;
     private int mBrandingImageHeight;
-
-    SplashscreenContentDrawer(Context context, int maxIconAnimationDuration) {
+    private final int mAppRevealDuration;
+    private final int mIconExitDuration;
+    private int mMainWindowShiftLength;
+    private int mIconNormalExitDistance;
+    private int mIconEarlyExitDistance;
+    private final TransactionPool mTransactionPool;
+
+    SplashscreenContentDrawer(Context context, int maxAnimatableIconDuration,
+            int iconExitAnimDuration, int appRevealAnimDuration, TransactionPool pool) {
         mContext = context;
-        mMaxIconAnimationDuration = maxIconAnimationDuration;
+        mMaxAnimatableIconDuration = maxAnimatableIconDuration;
+        mAppRevealDuration = appRevealAnimDuration;
+        mIconExitDuration = iconExitAnimDuration;
+        mTransactionPool = pool;
     }
 
     private void updateDensity() {
@@ -74,6 +86,12 @@ public class SplashscreenContentDrawer {
                 com.android.wm.shell.R.dimen.starting_surface_brand_image_width);
         mBrandingImageHeight = mContext.getResources().getDimensionPixelSize(
                 com.android.wm.shell.R.dimen.starting_surface_brand_image_height);
+        mMainWindowShiftLength = mContext.getResources().getDimensionPixelSize(
+                com.android.wm.shell.R.dimen.starting_surface_exit_animation_window_shift_length);
+        mIconNormalExitDistance = mContext.getResources().getDimensionPixelSize(
+                com.android.wm.shell.R.dimen.starting_surface_normal_exit_icon_distance);
+        mIconEarlyExitDistance = mContext.getResources().getDimensionPixelSize(
+                com.android.wm.shell.R.dimen.starting_surface_early_exit_icon_distance);
     }
 
     private int getSystemBGColor() {
@@ -119,7 +137,7 @@ public class SplashscreenContentDrawer {
         if (attrs.mReplaceIcon != null) {
             iconDrawable = attrs.mReplaceIcon;
             animationDuration = Math.max(0,
-                    Math.min(attrs.mAnimationDuration, mMaxIconAnimationDuration));
+                    Math.min(attrs.mAnimationDuration, mMaxAnimatableIconDuration));
         } else {
             iconDrawable = iconRes != 0 ? context.getDrawable(iconRes)
                     : context.getPackageManager().getDefaultActivityIcon();
@@ -439,8 +457,8 @@ public class SplashscreenContentDrawer {
         }
 
         /**
-         * For ColorDrawable only.
-         * There will be only one color so don't spend too much resource for it.
+         * For ColorDrawable only. There will be only one color so don't spend too much resource for
+         * it.
          */
         private static class SingleColorTester implements ColorTester {
             private final ColorDrawable mColorDrawable;
@@ -472,9 +490,8 @@ public class SplashscreenContentDrawer {
         }
 
         /**
-         * For any other Drawable except ColorDrawable.
-         * This will use the Palette API to check the color information and use a quantizer to
-         * filter out transparent colors when needed.
+         * For any other Drawable except ColorDrawable. This will use the Palette API to check the
+         * color information and use a quantizer to filter out transparent colors when needed.
          */
         private static class ComplexDrawableTester implements ColorTester {
             private static final int MAX_BITMAP_SIZE = 40;
@@ -593,4 +610,17 @@ public class SplashscreenContentDrawer {
             }
         }
     }
+
+    /**
+     * Create and play the default exit animation for splash screen view.
+     */
+    void applyExitAnimation(SplashScreenView view, SurfaceControl leash,
+            Rect frame, boolean isEarlyExit, Runnable finishCallback) {
+        final SplashScreenExitAnimation animation = new SplashScreenExitAnimation(view, leash,
+                frame, mAppRevealDuration, mIconExitDuration, mMainWindowShiftLength,
+                isEarlyExit ? mIconEarlyExitDistance : mIconNormalExitDistance, mTransactionPool,
+                finishCallback);
+        animation.prepareAnimations();
+        animation.startAnimations();
+    }
 }
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/startingsurface/StartingSurface.java b/libs/WindowManager/Shell/src/com/android/wm/shell/startingsurface/StartingSurface.java
index a594a9f31dde..f258286f2d17 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/startingsurface/StartingSurface.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/startingsurface/StartingSurface.java
@@ -16,7 +16,9 @@
 
 package com.android.wm.shell.startingsurface;
 
+import android.graphics.Rect;
 import android.os.IBinder;
+import android.view.SurfaceControl;
 import android.window.StartingWindowInfo;
 
 import java.util.function.BiConsumer;
@@ -31,7 +33,8 @@ public interface StartingSurface {
     /**
      * Called when the content of a task is ready to show, starting window can be removed.
      */
-    void removeStartingWindow(int taskId);
+    void removeStartingWindow(int taskId, SurfaceControl leash, Rect frame,
+            boolean playRevealAnimation);
     /**
      * Called when the Task wants to copy the splash screen.
      * @param taskId
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/startingsurface/StartingSurfaceDrawer.java b/libs/WindowManager/Shell/src/com/android/wm/shell/startingsurface/StartingSurfaceDrawer.java
index 2d1d65b87718..dbd518d4a3d3 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/startingsurface/StartingSurfaceDrawer.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/startingsurface/StartingSurfaceDrawer.java
@@ -29,14 +29,18 @@ import android.content.pm.PackageManager;
 import android.content.res.Configuration;
 import android.content.res.Resources;
 import android.content.res.TypedArray;
+import android.graphics.Color;
+import android.graphics.PixelFormat;
+import android.graphics.Rect;
+import android.graphics.drawable.ColorDrawable;
 import android.hardware.display.DisplayManager;
 import android.os.IBinder;
+import android.os.SystemClock;
 import android.util.Slog;
 import android.util.SparseArray;
-import android.view.Choreographer;
 import android.view.Display;
+import android.view.SurfaceControl;
 import android.view.View;
-import android.view.Window;
 import android.view.WindowManager;
 import android.window.SplashScreenView;
 import android.window.SplashScreenView.SplashScreenViewParcelable;
@@ -46,6 +50,7 @@ import android.window.TaskSnapshot;
 import com.android.internal.R;
 import com.android.internal.policy.PhoneWindow;
 import com.android.wm.shell.common.ShellExecutor;
+import com.android.wm.shell.common.TransactionPool;
 
 import java.util.function.Consumer;
 
@@ -62,23 +67,23 @@ public class StartingSurfaceDrawer {
     private final DisplayManager mDisplayManager;
     private final ShellExecutor mSplashScreenExecutor;
     private final SplashscreenContentDrawer mSplashscreenContentDrawer;
-    protected Choreographer mChoreographer;
 
     // TODO(b/131727939) remove this when clearing ActivityRecord
     private static final int REMOVE_WHEN_TIMEOUT = 2000;
 
-    public StartingSurfaceDrawer(Context context, ShellExecutor splashScreenExecutor) {
+    public StartingSurfaceDrawer(Context context, ShellExecutor splashScreenExecutor,
+            TransactionPool pool) {
         mContext = context;
         mDisplayManager = mContext.getSystemService(DisplayManager.class);
         mSplashScreenExecutor = splashScreenExecutor;
-        final int maxIconAnimDuration = context.getResources().getInteger(
+        final int maxAnimatableIconDuration = context.getResources().getInteger(
                 com.android.wm.shell.R.integer.max_starting_window_intro_icon_anim_duration);
-        mSplashscreenContentDrawer = new SplashscreenContentDrawer(mContext, maxIconAnimDuration);
-        mSplashScreenExecutor.execute(this::initChoreographer);
-    }
-
-    protected void initChoreographer() {
-        mChoreographer = Choreographer.getInstance();
+        final int iconExitAnimDuration = context.getResources().getInteger(
+                com.android.wm.shell.R.integer.starting_window_icon_exit_anim_duration);
+        final int appRevealAnimDuration = context.getResources().getInteger(
+                com.android.wm.shell.R.integer.starting_window_app_reveal_anim_duration);
+        mSplashscreenContentDrawer = new SplashscreenContentDrawer(mContext,
+                maxAnimatableIconDuration, iconExitAnimDuration, appRevealAnimDuration, pool);
     }
 
     private final SparseArray<StartingWindowRecord> mStartingWindowRecords = new SparseArray<>();
@@ -195,6 +200,7 @@ public class StartingSurfaceDrawer {
         }
 
         final PhoneWindow win = new PhoneWindow(context);
+        win.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
         win.setIsStartingWindow(true);
 
         CharSequence label = context.getResources().getText(labelRes, null);
@@ -247,6 +253,7 @@ public class StartingSurfaceDrawer {
         // Setting as trusted overlay to let touches pass through. This is safe because this
         // window is controlled by the system.
         params.privateFlags |= WindowManager.LayoutParams.PRIVATE_FLAG_TRUSTED_OVERLAY;
+        params.format = PixelFormat.RGBA_8888;
 
         final Resources res = context.getResources();
         final boolean supportsScreen = res != null && (res.getCompatibilityInfo() != null
@@ -257,98 +264,25 @@ public class StartingSurfaceDrawer {
 
         params.setTitle("Splash Screen " + activityInfo.packageName);
 
-        // TODO(b/173975965) If the target activity doesn't request FLAG_HARDWARE_ACCELERATED, we
-        // cannot replace the content view after first view was drawn, sounds like an issue.
-        new AddSplashScreenViewRunnable(taskInfo.taskId, win, context, appToken, params, iconRes,
-                        splashscreenContentResId[0], enableHardAccelerated).run();
-    }
-
-    private class AddSplashScreenViewRunnable implements Runnable {
-        private final int mTaskId;
-        private final Window mWin;
-        private final IBinder mAppToken;
-        private final WindowManager.LayoutParams mLayoutParams;
-        private final Context mContext;
-        private final int mIconRes;
-        private final int mSplashscreenContentResId;
-        private final boolean mReplaceSplashScreenView;
-        private int mSequence;
-
-        AddSplashScreenViewRunnable(int taskId, Window window, Context context,
-                IBinder appToken, WindowManager.LayoutParams params, int iconRes,
-                int splashscreenContentResId, boolean replaceSplashScreenView) {
-            mTaskId = taskId;
-            mWin = window;
-            mAppToken = appToken;
-            mContext = context;
-            mLayoutParams = params;
-            mIconRes = iconRes;
-            mSplashscreenContentResId = splashscreenContentResId;
-            mReplaceSplashScreenView = replaceSplashScreenView;
-        }
-
-        private void createInitialView() {
-            View tempView = new View(mContext);
-            mWin.setContentView(tempView);
-            mSequence++;
-            final View view = mWin.getDecorView();
-            final WindowManager wm = mContext.getSystemService(WindowManager.class);
-            if (postAddWindow(mTaskId, mAppToken, view, wm, mLayoutParams)) {
-                mChoreographer.postCallback(Choreographer.CALLBACK_COMMIT, this, null);
-            }
-        }
-
-        private SplashScreenView replaceRealView() {
-            final SplashScreenView sView =
-                    mSplashscreenContentDrawer.makeSplashScreenContentView(mContext,
-                            mIconRes, mSplashscreenContentResId);
-            mWin.setContentView(sView);
-            sView.cacheRootWindow(mWin);
-            return sView;
-        }
-
-        private SplashScreenView initiateOnce() {
-            final SplashScreenView sView =
-                    mSplashscreenContentDrawer.makeSplashScreenContentView(mContext, mIconRes,
-                            mSplashscreenContentResId);
-            final View view = mWin.getDecorView();
+        // TODO(b/173975965) tracking performance
+        final int taskId = taskInfo.taskId;
+        SplashScreenView sView = null;
+        try {
+            sView = mSplashscreenContentDrawer.makeSplashScreenContentView(context, iconRes,
+                            splashscreenContentResId[0]);
+            final View view = win.getDecorView();
             final WindowManager wm = mContext.getSystemService(WindowManager.class);
-            if (postAddWindow(mTaskId, mAppToken, view, wm, mLayoutParams)) {
-                mWin.setContentView(sView);
-                sView.cacheRootWindow(mWin);
-            }
-            return sView;
-        }
-
-        @Override
-        public void run() {
-            SplashScreenView view = null;
-            boolean setRecord = false;
-            try {
-                if (mReplaceSplashScreenView) {
-                    // Tricky way to make animation start faster... create the real content after
-                    // first window drawn. The first empty window won't been see because wm will
-                    // still need to wait for transition ready.
-                    if (mSequence == 0) {
-                        createInitialView();
-                    } else if (mSequence == 1) {
-                        setRecord = true;
-                        view = replaceRealView();
-                    }
-                } else {
-                    setRecord = true;
-                    view = initiateOnce();
-                }
-            } catch (RuntimeException e) {
-                // don't crash if something else bad happens, for example a
-                // failure loading resources because we are loading from an app
-                // on external storage that has been unmounted.
-                Slog.w(TAG, " failed creating starting window", e);
-            } finally {
-                if (setRecord) {
-                    setSplashScreenRecord(mTaskId, view);
-                }
+            if (postAddWindow(taskId, appToken, view, wm, params)) {
+                win.setContentView(sView);
+                sView.cacheRootWindow(win);
             }
+        } catch (RuntimeException e) {
+            // don't crash if something else bad happens, for example a
+            // failure loading resources because we are loading from an app
+            // on external storage that has been unmounted.
+            Slog.w(TAG, " failed creating starting window", e);
+        } finally {
+            setSplashScreenRecord(taskId, sView);
         }
     }
 
@@ -359,8 +293,10 @@ public class StartingSurfaceDrawer {
             TaskSnapshot snapshot) {
         final int taskId = startingWindowInfo.taskInfo.taskId;
         final TaskSnapshotWindow surface = TaskSnapshotWindow.create(startingWindowInfo, appToken,
-                snapshot, mSplashScreenExecutor, () -> removeWindowSynced(taskId));
-        mSplashScreenExecutor.executeDelayed(() -> removeWindowSynced(taskId), REMOVE_WHEN_TIMEOUT);
+                snapshot, mSplashScreenExecutor,
+                () -> removeWindowNoAnimate(taskId));
+        mSplashScreenExecutor.executeDelayed(() -> removeWindowNoAnimate(taskId),
+                REMOVE_WHEN_TIMEOUT);
         final StartingWindowRecord tView =
                 new StartingWindowRecord(null/* decorView */, surface);
         mStartingWindowRecords.put(taskId, tView);
@@ -369,11 +305,12 @@ public class StartingSurfaceDrawer {
     /**
      * Called when the content of a task is ready to show, starting window can be removed.
      */
-    public void removeStartingWindow(int taskId) {
+    public void removeStartingWindow(int taskId, SurfaceControl leash, Rect frame,
+            boolean playRevealAnimation) {
         if (DEBUG_SPLASH_SCREEN || DEBUG_TASK_SNAPSHOT) {
             Slog.d(TAG, "Task start finish, remove starting surface for task " + taskId);
         }
-        removeWindowSynced(taskId);
+        removeWindowSynced(taskId, leash, frame, playRevealAnimation);
     }
 
     /**
@@ -383,13 +320,6 @@ public class StartingSurfaceDrawer {
     public void copySplashScreenView(int taskId) {
         final StartingWindowRecord preView = mStartingWindowRecords.get(taskId);
         SplashScreenViewParcelable parcelable;
-        if (preView != null) {
-            if (preView.isWaitForContent()) {
-                mChoreographer.postCallback(Choreographer.CALLBACK_COMMIT,
-                        () -> copySplashScreenView(taskId), null);
-                return;
-            }
-        }
         if (preView != null && preView.mContentView != null
                 && preView.mContentView.isCopyable()) {
             parcelable = new SplashScreenViewParcelable(preView.mContentView);
@@ -427,9 +357,9 @@ public class StartingSurfaceDrawer {
             }
         }
         if (shouldSaveView) {
-            removeWindowSynced(taskId);
-            mSplashScreenExecutor.executeDelayed(() -> removeWindowSynced(taskId),
-                    REMOVE_WHEN_TIMEOUT);
+            removeWindowNoAnimate(taskId);
+            mSplashScreenExecutor.executeDelayed(
+                    () -> removeWindowNoAnimate(taskId), REMOVE_WHEN_TIMEOUT);
             saveSplashScreenRecord(taskId, view);
         }
         return shouldSaveView;
@@ -449,24 +379,30 @@ public class StartingSurfaceDrawer {
         }
     }
 
-    protected void removeWindowSynced(int taskId) {
+    private void removeWindowNoAnimate(int taskId) {
+        removeWindowSynced(taskId, null, null, false);
+    }
+
+    protected void removeWindowSynced(int taskId, SurfaceControl leash, Rect frame,
+            boolean playRevealAnimation) {
         final StartingWindowRecord record = mStartingWindowRecords.get(taskId);
         if (record != null) {
-            if (record.isWaitForContent()) {
-                if (DEBUG_SPLASH_SCREEN) {
-                    Slog.v(TAG, "splash screen window haven't been draw yet");
-                }
-                mChoreographer.postCallback(Choreographer.CALLBACK_COMMIT,
-                        () -> removeWindowSynced(taskId), null);
-                return;
-            }
             if (record.mDecorView != null) {
                 if (DEBUG_SPLASH_SCREEN) {
                     Slog.v(TAG, "Removing splash screen window for task: " + taskId);
                 }
-                final WindowManager wm = record.mDecorView.getContext()
-                        .getSystemService(WindowManager.class);
-                wm.removeView(record.mDecorView);
+                if (record.mContentView != null) {
+                    final HandleExitFinish exitFinish = new HandleExitFinish(record.mDecorView);
+                    if (leash != null || playRevealAnimation) {
+                        mSplashscreenContentDrawer.applyExitAnimation(record.mContentView,
+                                leash, frame, record.isEarlyExit(), exitFinish);
+                        mSplashScreenExecutor.executeDelayed(exitFinish, REMOVE_WHEN_TIMEOUT);
+                    } else {
+                        // the SplashScreenView has been copied to client, skip default exit
+                        // animation
+                        exitFinish.run();
+                    }
+                }
             }
             if (record.mTaskSnapshotWindow != null) {
                 if (DEBUG_TASK_SNAPSHOT) {
@@ -478,6 +414,26 @@ public class StartingSurfaceDrawer {
         }
     }
 
+    private static class HandleExitFinish implements Runnable {
+        private View mDecorView;
+
+        HandleExitFinish(View decorView) {
+            mDecorView = decorView;
+        }
+
+        @Override
+        public void run() {
+            if (mDecorView == null) {
+                return;
+            }
+            final WindowManager wm = mDecorView.getContext().getSystemService(WindowManager.class);
+            if (wm != null) {
+                wm.removeView(mDecorView);
+            }
+            mDecorView = null;
+        }
+    }
+
     private void getWindowResFromContext(Context ctx, Consumer<TypedArray> consumer) {
         final TypedArray a = ctx.obtainStyledAttributes(R.styleable.Window);
         consumer.accept(a);
@@ -488,10 +444,12 @@ public class StartingSurfaceDrawer {
      * Record the view or surface for a starting window.
      */
     private static class StartingWindowRecord {
+        private static final long EARLY_START_MINIMUM_TIME_MS = 250;
         private final View mDecorView;
         private final TaskSnapshotWindow mTaskSnapshotWindow;
         private SplashScreenView mContentView;
         private boolean mSetSplashScreen;
+        private long mContentCreateTime;
 
         StartingWindowRecord(View decorView, TaskSnapshotWindow taskSnapshotWindow) {
             mDecorView = decorView;
@@ -503,11 +461,12 @@ public class StartingSurfaceDrawer {
                 return;
             }
             mContentView = splashScreenView;
+            mContentCreateTime = SystemClock.uptimeMillis();
             mSetSplashScreen = true;
         }
 
-        private boolean isWaitForContent() {
-            return mDecorView != null && !mSetSplashScreen;
+        boolean isEarlyExit() {
+            return SystemClock.uptimeMillis() - mContentCreateTime < EARLY_START_MINIMUM_TIME_MS;
         }
     }
 }
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/startingsurface/StartingWindowController.java b/libs/WindowManager/Shell/src/com/android/wm/shell/startingsurface/StartingWindowController.java
index 5eb7071fbd63..60f9585137f9 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/startingsurface/StartingWindowController.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/startingsurface/StartingWindowController.java
@@ -28,14 +28,17 @@ import static android.window.StartingWindowInfo.TYPE_PARAMETER_TASK_SWITCH;
 import android.app.ActivityManager.RunningTaskInfo;
 import android.app.ActivityTaskManager;
 import android.content.Context;
+import android.graphics.Rect;
 import android.os.IBinder;
 import android.os.RemoteException;
 import android.util.Slog;
+import android.view.SurfaceControl;
 import android.window.StartingWindowInfo;
 import android.window.TaskOrganizer;
 import android.window.TaskSnapshot;
 
 import com.android.wm.shell.common.ShellExecutor;
+import com.android.wm.shell.common.TransactionPool;
 
 import java.util.function.BiConsumer;
 
@@ -67,8 +70,16 @@ public class StartingWindowController {
     private final StartingSurfaceImpl mImpl = new StartingSurfaceImpl();
     private final ShellExecutor mSplashScreenExecutor;
 
+    // For Car Launcher
     public StartingWindowController(Context context, ShellExecutor splashScreenExecutor) {
-        mStartingSurfaceDrawer = new StartingSurfaceDrawer(context, splashScreenExecutor);
+        mStartingSurfaceDrawer = new StartingSurfaceDrawer(context, splashScreenExecutor,
+                new TransactionPool());
+        mSplashScreenExecutor = splashScreenExecutor;
+    }
+
+    public StartingWindowController(Context context, ShellExecutor splashScreenExecutor,
+            TransactionPool pool) {
+        mStartingSurfaceDrawer = new StartingSurfaceDrawer(context, splashScreenExecutor, pool);
         mSplashScreenExecutor = splashScreenExecutor;
     }
 
@@ -198,8 +209,9 @@ public class StartingWindowController {
     /**
      * Called when the content of a task is ready to show, starting window can be removed.
      */
-    void removeStartingWindow(int taskId) {
-        mStartingSurfaceDrawer.removeStartingWindow(taskId);
+    void removeStartingWindow(int taskId, SurfaceControl leash, Rect frame,
+            boolean playRevealAnimation) {
+        mStartingSurfaceDrawer.removeStartingWindow(taskId, leash, frame, playRevealAnimation);
     }
 
     private class StartingSurfaceImpl implements StartingSurface {
@@ -211,9 +223,11 @@ public class StartingWindowController {
         }
 
         @Override
-        public void removeStartingWindow(int taskId) {
+        public void removeStartingWindow(int taskId, SurfaceControl leash, Rect frame,
+                boolean playRevealAnimation) {
             mSplashScreenExecutor.execute(() ->
-                    StartingWindowController.this.removeStartingWindow(taskId));
+                    StartingWindowController.this.removeStartingWindow(taskId, leash, frame,
+                            playRevealAnimation));
         }
 
         @Override
diff --git a/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/startingsurface/StartingSurfaceDrawerTests.java b/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/startingsurface/StartingSurfaceDrawerTests.java
index a531ef58725d..624c27fe9fd2 100644
--- a/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/startingsurface/StartingSurfaceDrawerTests.java
+++ b/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/startingsurface/StartingSurfaceDrawerTests.java
@@ -33,11 +33,12 @@ import android.content.Context;
 import android.content.pm.ActivityInfo;
 import android.content.pm.ApplicationInfo;
 import android.content.pm.PackageManager;
+import android.graphics.Rect;
 import android.os.Handler;
 import android.os.IBinder;
 import android.os.Looper;
 import android.testing.TestableContext;
-import android.view.Choreographer;
+import android.view.SurfaceControl;
 import android.view.View;
 import android.view.WindowManager;
 import android.view.WindowMetrics;
@@ -49,6 +50,7 @@ import androidx.test.platform.app.InstrumentationRegistry;
 
 import com.android.wm.shell.common.HandlerExecutor;
 import com.android.wm.shell.common.ShellExecutor;
+import com.android.wm.shell.common.TransactionPool;
 import com.android.wm.shell.startingsurface.StartingSurfaceDrawer;
 
 import org.junit.Before;
@@ -68,7 +70,7 @@ public class StartingSurfaceDrawerTests {
     @Mock
     private WindowManager mMockWindowManager;
     @Mock
-    private static Choreographer sFakeChoreographer;
+    private TransactionPool mTransactionPool;
 
     TestStartingSurfaceDrawer mStartingSurfaceDrawer;
 
@@ -76,13 +78,9 @@ public class StartingSurfaceDrawerTests {
         int mAddWindowForTask = 0;
         int mViewThemeResId;
 
-        TestStartingSurfaceDrawer(Context context, ShellExecutor executor) {
-            super(context, executor);
-        }
-
-        @Override
-        protected void initChoreographer() {
-            mChoreographer = sFakeChoreographer;
+        TestStartingSurfaceDrawer(Context context, ShellExecutor animExecutor,
+                TransactionPool pool) {
+            super(context, animExecutor, pool);
         }
 
         @Override
@@ -95,7 +93,8 @@ public class StartingSurfaceDrawerTests {
         }
 
         @Override
-        protected void removeWindowSynced(int taskId) {
+        protected void removeWindowSynced(int taskId, SurfaceControl leash, Rect frame,
+                boolean playRevealAnimation) {
             // listen for removeView
             if (mAddWindowForTask == taskId) {
                 mAddWindowForTask = 0;
@@ -123,7 +122,8 @@ public class StartingSurfaceDrawerTests {
         doNothing().when(mMockWindowManager).addView(any(), any());
 
         mStartingSurfaceDrawer = spy(new TestStartingSurfaceDrawer(context,
-                new HandlerExecutor(new Handler(Looper.getMainLooper()))));
+                new HandlerExecutor(new Handler(Looper.getMainLooper())),
+                mTransactionPool));
     }
 
     @Test
@@ -137,9 +137,9 @@ public class StartingSurfaceDrawerTests {
         verify(mStartingSurfaceDrawer).postAddWindow(eq(taskId), eq(mBinder), any(), any(), any());
         assertEquals(mStartingSurfaceDrawer.mAddWindowForTask, taskId);
 
-        mStartingSurfaceDrawer.removeStartingWindow(windowInfo.taskInfo.taskId);
+        mStartingSurfaceDrawer.removeStartingWindow(windowInfo.taskInfo.taskId, null, null, false);
         waitHandlerIdle(mainLoop);
-        verify(mStartingSurfaceDrawer).removeWindowSynced(eq(taskId));
+        verify(mStartingSurfaceDrawer).removeWindowSynced(eq(taskId), any(), any(), eq(false));
         assertEquals(mStartingSurfaceDrawer.mAddWindowForTask, 0);
     }
 
diff --git a/packages/SystemUI/src/com/android/systemui/wmshell/WMShellBaseModule.java b/packages/SystemUI/src/com/android/systemui/wmshell/WMShellBaseModule.java
index a12326961b08..1b6c61237e29 100644
--- a/packages/SystemUI/src/com/android/systemui/wmshell/WMShellBaseModule.java
+++ b/packages/SystemUI/src/com/android/systemui/wmshell/WMShellBaseModule.java
@@ -480,8 +480,8 @@ public abstract class WMShellBaseModule {
     @WMSingleton
     @Provides
     static StartingWindowController provideStartingWindowController(Context context,
-            @ShellSplashscreenThread ShellExecutor executor) {
-        return new StartingWindowController(context, executor);
+            @ShellAnimationThread ShellExecutor executor, TransactionPool pool) {
+        return new StartingWindowController(context, executor, pool);
     }
 
     //
diff --git a/services/core/java/com/android/server/policy/SplashScreenSurface.java b/services/core/java/com/android/server/policy/SplashScreenSurface.java
index b9202c334fec..72933a0ad309 100644
--- a/services/core/java/com/android/server/policy/SplashScreenSurface.java
+++ b/services/core/java/com/android/server/policy/SplashScreenSurface.java
@@ -45,7 +45,7 @@ class SplashScreenSurface implements StartingSurface {
     }
 
     @Override
-    public void remove() {
+    public void remove(boolean animate) {
         if (DEBUG_SPLASH_SCREEN) Slog.v(TAG, "Removing splash screen window for " + mAppToken + ": "
                         + this + " Callers=" + Debug.getCallers(4));
 
diff --git a/services/core/java/com/android/server/policy/WindowManagerPolicy.java b/services/core/java/com/android/server/policy/WindowManagerPolicy.java
index b5a9acacec83..8d644611cfbf 100644
--- a/services/core/java/com/android/server/policy/WindowManagerPolicy.java
+++ b/services/core/java/com/android/server/policy/WindowManagerPolicy.java
@@ -238,8 +238,9 @@ public interface WindowManagerPolicy extends WindowManagerPolicyConstants {
         /**
          * Removes the starting window surface. Do not hold the window manager lock when calling
          * this method!
+         * @param animate Whether need to play the default exit animation for starting window.
          */
-        void remove();
+        void remove(boolean animate);
     }
 
     /**
diff --git a/services/core/java/com/android/server/wm/ActivityRecord.java b/services/core/java/com/android/server/wm/ActivityRecord.java
index aeeabe21460c..d132f9e96479 100644
--- a/services/core/java/com/android/server/wm/ActivityRecord.java
+++ b/services/core/java/com/android/server/wm/ActivityRecord.java
@@ -2114,7 +2114,7 @@ final class ActivityRecord extends WindowToken implements WindowManagerService.A
                     }
                 }
                 if (abort) {
-                    surface.remove();
+                    surface.remove(false /* prepareAnimation */);
                 }
             } else {
                 ProtoLog.v(WM_DEBUG_STARTING_WINDOW, "Surface returned was null: %s",
@@ -2179,7 +2179,6 @@ final class ActivityRecord extends WindowToken implements WindowManagerService.A
                         + ActivityRecord.this + " state " + mTransferringSplashScreenState);
                 if (isTransferringSplashScreen()) {
                     mTransferringSplashScreenState = TRANSFER_SPLASH_SCREEN_FINISH;
-                    // TODO show default exit splash screen animation
                     removeStartingWindow();
                 }
             }
@@ -2196,6 +2195,9 @@ final class ActivityRecord extends WindowToken implements WindowManagerService.A
     }
 
     private boolean transferSplashScreenIfNeeded() {
+        if (!mWmService.mStartingSurfaceController.DEBUG_ENABLE_SHELL_DRAWER) {
+            return false;
+        }
         if (!mHandleExitSplashScreen || mStartingSurface == null || mStartingWindow == null
                 || mTransferringSplashScreenState == TRANSFER_SPLASH_SCREEN_FINISH) {
             return false;
@@ -2265,10 +2267,14 @@ final class ActivityRecord extends WindowToken implements WindowManagerService.A
         }
         // no matter what, remove the starting window.
         mTransferringSplashScreenState = TRANSFER_SPLASH_SCREEN_FINISH;
-        removeStartingWindow();
+        removeStartingWindowAnimation(false /* prepareAnimation */);
     }
 
     void removeStartingWindow() {
+        removeStartingWindowAnimation(true /* prepareAnimation */);
+    }
+
+    void removeStartingWindowAnimation(boolean prepareAnimation) {
         if (transferSplashScreenIfNeeded()) {
             return;
         }
@@ -2313,7 +2319,7 @@ final class ActivityRecord extends WindowToken implements WindowManagerService.A
         mWmService.mAnimationHandler.post(() -> {
             ProtoLog.v(WM_DEBUG_STARTING_WINDOW, "Removing startingView=%s", surface);
             try {
-                surface.remove();
+                surface.remove(prepareAnimation);
             } catch (Exception e) {
                 Slog.w(TAG_WM, "Exception when removing starting window", e);
             }
@@ -6190,7 +6196,7 @@ final class ActivityRecord extends WindowToken implements WindowManagerService.A
             // Remove orphaned starting window.
             if (DEBUG_VISIBILITY) Slog.w(TAG_VISIBILITY, "Found orphaned starting window " + this);
             mStartingWindowState = STARTING_WINDOW_REMOVED;
-            removeStartingWindow();
+            removeStartingWindowAnimation(false /* prepareAnimation */);
         }
         if (isState(INITIALIZING) && !shouldBeVisible(
                 true /* behindFullscreenActivity */, true /* ignoringKeyguard */)) {
diff --git a/services/core/java/com/android/server/wm/StartingSurfaceController.java b/services/core/java/com/android/server/wm/StartingSurfaceController.java
index ef4a40f4837c..70666e7d9e9b 100644
--- a/services/core/java/com/android/server/wm/StartingSurfaceController.java
+++ b/services/core/java/com/android/server/wm/StartingSurfaceController.java
@@ -40,7 +40,7 @@ public class StartingSurfaceController {
     private static final String TAG = TAG_WITH_CLASS_NAME
             ? StartingSurfaceController.class.getSimpleName() : TAG_WM;
     /** Set to {@code true} to enable shell starting surface drawer. */
-    private static final boolean DEBUG_ENABLE_SHELL_DRAWER =
+    static final boolean DEBUG_ENABLE_SHELL_DRAWER =
             SystemProperties.getBoolean("persist.debug.shell_starting_surface", false);
 
     private final WindowManagerService mService;
@@ -139,8 +139,9 @@ public class StartingSurfaceController {
         }
 
         @Override
-        public void remove() {
-            mService.mAtmService.mTaskOrganizerController.removeStartingWindow(mTask);
+        public void remove(boolean animate) {
+            mService.mAtmService.mTaskOrganizerController.removeStartingWindow(mTask,
+                    animate);
         }
     }
 }
diff --git a/services/core/java/com/android/server/wm/TaskOrganizerController.java b/services/core/java/com/android/server/wm/TaskOrganizerController.java
index fc6db61bdbcd..385dc79567fa 100644
--- a/services/core/java/com/android/server/wm/TaskOrganizerController.java
+++ b/services/core/java/com/android/server/wm/TaskOrganizerController.java
@@ -32,6 +32,7 @@ import android.app.WindowConfiguration;
 import android.content.Intent;
 import android.content.pm.ActivityInfo;
 import android.content.pm.ParceledListSlice;
+import android.graphics.Rect;
 import android.os.Binder;
 import android.os.IBinder;
 import android.os.Parcel;
@@ -131,10 +132,28 @@ class TaskOrganizerController extends ITaskOrganizerController.Stub {
             });
         }
 
-        void removeStartingWindow(Task task) {
+        void removeStartingWindow(Task task, boolean prepareAnimation) {
             mDeferTaskOrgCallbacksConsumer.accept(() -> {
+                SurfaceControl firstWindowLeash = null;
+                Rect mainFrame = null;
+                // TODO enable shift up animation once we fix flicker test
+//                final boolean playShiftUpAnimation = !task.inMultiWindowMode();
+//                if (prepareAnimation && playShiftUpAnimation) {
+//                    final ActivityRecord topActivity = task.topActivityWithStartingWindow();
+//                    if (topActivity != null) {
+//                        final WindowState mainWindow =
+//                                topActivity.findMainWindow(false/* includeStartingApp */);
+//                        if (mainWindow != null) {
+                // TODO create proper leash instead of the copied SC
+//                            firstWindowLeash = new SurfaceControl(mainWindow.getSurfaceControl(),
+//                                    "TaskOrganizerController.removeStartingWindow");
+//                            mainFrame = mainWindow.getRelativeFrame();
+//                        }
+//                    }
+//                }
                 try {
-                    mTaskOrganizer.removeStartingWindow(task.mTaskId);
+                    mTaskOrganizer.removeStartingWindow(task.mTaskId, firstWindowLeash, mainFrame,
+                            prepareAnimation);
                 } catch (RemoteException e) {
                     Slog.e(TAG, "Exception sending onStartTaskFinished callback", e);
                 }
@@ -249,8 +268,8 @@ class TaskOrganizerController extends ITaskOrganizerController.Stub {
             mOrganizer.addStartingWindow(t, appToken, launchTheme);
         }
 
-        void removeStartingWindow(Task t) {
-            mOrganizer.removeStartingWindow(t);
+        void removeStartingWindow(Task t, boolean prepareAnimation) {
+            mOrganizer.removeStartingWindow(t, prepareAnimation);
         }
 
         void copySplashScreenView(Task t) {
@@ -495,14 +514,14 @@ class TaskOrganizerController extends ITaskOrganizerController.Stub {
         return true;
     }
 
-    void removeStartingWindow(Task task) {
+    void removeStartingWindow(Task task, boolean prepareAnimation) {
         final Task rootTask = task.getRootTask();
         if (rootTask == null || rootTask.mTaskOrganizer == null) {
             return;
         }
         final TaskOrganizerState state =
                 mTaskOrganizerStates.get(rootTask.mTaskOrganizer.asBinder());
-        state.removeStartingWindow(task);
+        state.removeStartingWindow(task, prepareAnimation);
     }
 
     boolean copySplashScreenView(Task task) {
diff --git a/services/core/java/com/android/server/wm/TaskSnapshotSurface.java b/services/core/java/com/android/server/wm/TaskSnapshotSurface.java
index 07610ab6d546..79a6bd7dcd2c 100644
--- a/services/core/java/com/android/server/wm/TaskSnapshotSurface.java
+++ b/services/core/java/com/android/server/wm/TaskSnapshotSurface.java
@@ -281,13 +281,14 @@ class TaskSnapshotSurface implements StartingSurface {
     }
 
     @Override
-    public void remove() {
+    public void remove(boolean animate) {
         synchronized (mService.mGlobalLock) {
             final long now = SystemClock.uptimeMillis();
             if (mSizeMismatch && now - mShownTime < SIZE_MISMATCH_MINIMUM_TIME_MS
                     // Show the latest content as soon as possible for unlocking to home.
                     && mActivityType != ACTIVITY_TYPE_HOME) {
-                mHandler.postAtTime(this::remove, mShownTime + SIZE_MISMATCH_MINIMUM_TIME_MS);
+                mHandler.postAtTime(() -> remove(false /* prepareAnimation */),
+                        mShownTime + SIZE_MISMATCH_MINIMUM_TIME_MS);
                 ProtoLog.v(WM_DEBUG_STARTING_WINDOW,
                         "Defer removing snapshot surface in %dms", (now - mShownTime));
 
@@ -517,7 +518,7 @@ class TaskSnapshotSurface implements StartingSurface {
                 // The orientation of the screen is changing. We better remove the snapshot ASAP as
                 // we are going to wait on the new window in any case to unfreeze the screen, and
                 // the starting window is not needed anymore.
-                sHandler.post(mOuter::remove);
+                sHandler.post(() -> mOuter.remove(false /* prepareAnimation */));
             }
             if (reportDraw) {
                 sHandler.obtainMessage(MSG_REPORT_DRAW, mOuter).sendToTarget();
diff --git a/services/tests/wmtests/src/com/android/server/wm/TestWindowManagerPolicy.java b/services/tests/wmtests/src/com/android/server/wm/TestWindowManagerPolicy.java
index 86d8eee878fd..7822a8514a13 100644
--- a/services/tests/wmtests/src/com/android/server/wm/TestWindowManagerPolicy.java
+++ b/services/tests/wmtests/src/com/android/server/wm/TestWindowManagerPolicy.java
@@ -119,7 +119,7 @@ class TestWindowManagerPolicy implements WindowManagerPolicy {
             mRunnableWhenAddingSplashScreen.run();
             mRunnableWhenAddingSplashScreen = null;
         }
-        return () -> {
+        return (a) -> {
             synchronized (wm.mGlobalLock) {
                 activity.removeChild(window);
                 activity.mStartingWindow = null;
diff --git a/services/tests/wmtests/src/com/android/server/wm/WindowOrganizerTests.java b/services/tests/wmtests/src/com/android/server/wm/WindowOrganizerTests.java
index 2c2c09a5750a..01c503e01326 100644
--- a/services/tests/wmtests/src/com/android/server/wm/WindowOrganizerTests.java
+++ b/services/tests/wmtests/src/com/android/server/wm/WindowOrganizerTests.java
@@ -547,7 +547,8 @@ public class WindowOrganizerTests extends WindowTestsBase {
             }
 
             @Override
-            public void removeStartingWindow(int taskId) { }
+            public void removeStartingWindow(int taskId, SurfaceControl leash, Rect frame,
+                    boolean playRevealAnimation) { }
 
             @Override
             public void copySplashScreenView(int taskId) { }
@@ -614,7 +615,8 @@ public class WindowOrganizerTests extends WindowTestsBase {
 
             }
             @Override
-            public void removeStartingWindow(int taskId) { }
+            public void removeStartingWindow(int taskId, SurfaceControl leash, Rect frame,
+                    boolean playRevealAnimation) { }
             @Override
             public void copySplashScreenView(int taskId) { }
             @Override
@@ -688,7 +690,8 @@ public class WindowOrganizerTests extends WindowTestsBase {
             }
 
             @Override
-            public void removeStartingWindow(int taskId) { }
+            public void removeStartingWindow(int taskId, SurfaceControl leash, Rect frame,
+                    boolean playRevealAnimation) { }
             @Override
             public void copySplashScreenView(int taskId) { }
             @Override
@@ -832,7 +835,8 @@ public class WindowOrganizerTests extends WindowTestsBase {
         @Override
         public void addStartingWindow(StartingWindowInfo info, IBinder appToken) { }
         @Override
-        public void removeStartingWindow(int taskId) { }
+        public void removeStartingWindow(int taskId, SurfaceControl leash, Rect frame,
+                boolean playRevealAnimation) { }
         @Override
         public void copySplashScreenView(int taskId) { }
         @Override
diff --git a/services/tests/wmtests/src/com/android/server/wm/WindowTestsBase.java b/services/tests/wmtests/src/com/android/server/wm/WindowTestsBase.java
index 827ff6c18a68..4ee459a10f0b 100644
--- a/services/tests/wmtests/src/com/android/server/wm/WindowTestsBase.java
+++ b/services/tests/wmtests/src/com/android/server/wm/WindowTestsBase.java
@@ -67,6 +67,7 @@ import android.content.Context;
 import android.content.Intent;
 import android.content.pm.ActivityInfo;
 import android.content.pm.ApplicationInfo;
+import android.graphics.Rect;
 import android.hardware.display.DisplayManager;
 import android.os.Build;
 import android.os.Bundle;
@@ -1161,7 +1162,8 @@ class WindowTestsBase extends SystemServiceTestsBase {
         public void addStartingWindow(StartingWindowInfo info, IBinder appToken) {
         }
         @Override
-        public void removeStartingWindow(int taskId) {
+        public void removeStartingWindow(int taskId, SurfaceControl leash, Rect frame,
+                boolean playRevealAnimation) {
         }
         @Override
         public void copySplashScreenView(int taskId) {