Merge "Add support for rounded notification in groups" into tm-qpr-dev

20 files changed, 1081 insertions, 403 deletions

diff --git a/packages/SystemUI/src/com/android/systemui/flags/Flags.kt b/packages/SystemUI/src/com/android/systemui/flags/Flags.kt
index e5b7ff930910..9ef3f5d97d47 100644
--- a/packages/SystemUI/src/com/android/systemui/flags/Flags.kt
+++ b/packages/SystemUI/src/com/android/systemui/flags/Flags.kt
@@ -63,7 +63,8 @@ object Flags {
     @JvmField val NOTIFICATION_DISMISSAL_FADE = UnreleasedFlag(113, teamfood = true)
     val STABILITY_INDEX_FIX = UnreleasedFlag(114, teamfood = true)
     val SEMI_STABLE_SORT = UnreleasedFlag(115, teamfood = true)
-    // next id: 116
+    @JvmField val NOTIFICATION_GROUP_CORNER = UnreleasedFlag(116, true)
+    // next id: 117
 
     // 200 - keyguard/lockscreen
     // ** Flag retired **
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/NotificationShelf.java b/packages/SystemUI/src/com/android/systemui/statusbar/NotificationShelf.java
index f96198450ed6..87ef92a28d5d 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/NotificationShelf.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/NotificationShelf.java
@@ -40,6 +40,7 @@ import com.android.systemui.animation.Interpolators;
 import com.android.systemui.animation.ShadeInterpolation;
 import com.android.systemui.plugins.statusbar.StatusBarStateController.StateListener;
 import com.android.systemui.statusbar.notification.NotificationUtils;
+import com.android.systemui.statusbar.notification.SourceType;
 import com.android.systemui.statusbar.notification.row.ActivatableNotificationView;
 import com.android.systemui.statusbar.notification.row.ExpandableNotificationRow;
 import com.android.systemui.statusbar.notification.row.ExpandableView;
@@ -110,8 +111,8 @@ public class NotificationShelf extends ActivatableNotificationView implements
         setClipChildren(false);
         setClipToPadding(false);
         mShelfIcons.setIsStaticLayout(false);
-        setBottomRoundness(1.0f, false /* animate */);
-        setTopRoundness(1f, false /* animate */);
+        requestBottomRoundness(1.0f, /* animate = */ false, SourceType.DefaultValue);
+        requestTopRoundness(1f, false, SourceType.DefaultValue);
 
         // Setting this to first in section to get the clipping to the top roundness correct. This
         // value determines the way we are clipping to the top roundness of the overall shade
@@ -413,7 +414,7 @@ public class NotificationShelf extends ActivatableNotificationView implements
                     if (iconState != null && iconState.clampedAppearAmount == 1.0f) {
                         // only if the first icon is fully in the shelf we want to clip to it!
                         backgroundTop = (int) (child.getTranslationY() - getTranslationY());
-                        firstElementRoundness = expandableRow.getCurrentTopRoundness();
+                        firstElementRoundness = expandableRow.getTopRoundness();
                     }
                 }
 
@@ -507,28 +508,36 @@ public class NotificationShelf extends ActivatableNotificationView implements
             // Round bottom corners within animation bounds
             final float changeFraction = MathUtils.saturate(
                     (viewEnd - cornerAnimationTop) / cornerAnimationDistance);
-            anv.setBottomRoundness(anv.isLastInSection() ? 1f : changeFraction,
-                    false /* animate */);
+            anv.requestBottomRoundness(
+                    anv.isLastInSection() ? 1f : changeFraction,
+                    /* animate = */ false,
+                    SourceType.OnScroll);
 
         } else if (viewEnd < cornerAnimationTop) {
             // Fast scroll skips frames and leaves corners with unfinished rounding.
             // Reset top and bottom corners outside of animation bounds.
-            anv.setBottomRoundness(anv.isLastInSection() ? 1f : smallCornerRadius,
-                    false /* animate */);
+            anv.requestBottomRoundness(
+                    anv.isLastInSection() ? 1f : smallCornerRadius,
+                    /* animate = */ false,
+                    SourceType.OnScroll);
         }
 
         if (viewStart >= cornerAnimationTop) {
             // Round top corners within animation bounds
             final float changeFraction = MathUtils.saturate(
                     (viewStart - cornerAnimationTop) / cornerAnimationDistance);
-            anv.setTopRoundness(anv.isFirstInSection() ? 1f : changeFraction,
-                    false /* animate */);
+            anv.requestTopRoundness(
+                    anv.isFirstInSection() ? 1f : changeFraction,
+                    false,
+                    SourceType.OnScroll);
 
         } else if (viewStart < cornerAnimationTop) {
             // Fast scroll skips frames and leaves corners with unfinished rounding.
             // Reset top and bottom corners outside of animation bounds.
-            anv.setTopRoundness(anv.isFirstInSection() ? 1f : smallCornerRadius,
-                    false /* animate */);
+            anv.requestTopRoundness(
+                    anv.isFirstInSection() ? 1f : smallCornerRadius,
+                    false,
+                    SourceType.OnScroll);
         }
     }
 
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/NotificationLaunchAnimatorController.kt b/packages/SystemUI/src/com/android/systemui/statusbar/notification/NotificationLaunchAnimatorController.kt
index 553826dda919..0d35fdce953e 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/NotificationLaunchAnimatorController.kt
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/NotificationLaunchAnimatorController.kt
@@ -70,8 +70,8 @@ class NotificationLaunchAnimatorController(
         val height = max(0, notification.actualHeight - notification.clipBottomAmount)
         val location = notification.locationOnScreen
 
-        val clipStartLocation = notificationListContainer.getTopClippingStartLocation()
-        val roundedTopClipping = Math.max(clipStartLocation - location[1], 0)
+        val clipStartLocation = notificationListContainer.topClippingStartLocation
+        val roundedTopClipping = (clipStartLocation - location[1]).coerceAtLeast(0)
         val windowTop = location[1] + roundedTopClipping
         val topCornerRadius = if (roundedTopClipping > 0) {
             // Because the rounded Rect clipping is complex, we start the top rounding at
@@ -80,7 +80,7 @@ class NotificationLaunchAnimatorController(
             // if we'd like to have this perfect, but this is close enough.
             0f
         } else {
-            notification.currentBackgroundRadiusTop
+            notification.topCornerRadius
         }
         val params = LaunchAnimationParameters(
             top = windowTop,
@@ -88,7 +88,7 @@ class NotificationLaunchAnimatorController(
             left = location[0],
             right = location[0] + notification.width,
             topCornerRadius = topCornerRadius,
-            bottomCornerRadius = notification.currentBackgroundRadiusBottom
+            bottomCornerRadius = notification.bottomCornerRadius
         )
 
         params.startTranslationZ = notification.translationZ
@@ -97,8 +97,8 @@ class NotificationLaunchAnimatorController(
         params.startClipTopAmount = notification.clipTopAmount
         if (notification.isChildInGroup) {
             params.startNotificationTop += notification.notificationParent.translationY
-            val parentRoundedClip = Math.max(
-                clipStartLocation - notification.notificationParent.locationOnScreen[1], 0)
+            val locationOnScreen = notification.notificationParent.locationOnScreen[1]
+            val parentRoundedClip = (clipStartLocation - locationOnScreen).coerceAtLeast(0)
             params.parentStartRoundedTopClipping = parentRoundedClip
 
             val parentClip = notification.notificationParent.clipTopAmount
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/Roundable.kt b/packages/SystemUI/src/com/android/systemui/statusbar/notification/Roundable.kt
new file mode 100644
index 000000000000..ed7f648081c8
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/Roundable.kt
@@ -0,0 +1,284 @@
+package com.android.systemui.statusbar.notification
+
+import android.util.FloatProperty
+import android.view.View
+import androidx.annotation.FloatRange
+import com.android.systemui.R
+import com.android.systemui.statusbar.notification.stack.AnimationProperties
+import com.android.systemui.statusbar.notification.stack.StackStateAnimator
+import kotlin.math.abs
+
+/**
+ * Interface that allows to request/retrieve top and bottom roundness (a value between 0f and 1f).
+ *
+ * To request a roundness value, an [SourceType] must be specified. In case more origins require
+ * different roundness, for the same property, the maximum value will always be chosen.
+ *
+ * It also returns the current radius for all corners ([updatedRadii]).
+ */
+interface Roundable {
+    /** Properties required for a Roundable */
+    val roundableState: RoundableState
+
+    /** Current top roundness */
+    @get:FloatRange(from = 0.0, to = 1.0)
+    @JvmDefault
+    val topRoundness: Float
+        get() = roundableState.topRoundness
+
+    /** Current bottom roundness */
+    @get:FloatRange(from = 0.0, to = 1.0)
+    @JvmDefault
+    val bottomRoundness: Float
+        get() = roundableState.bottomRoundness
+
+    /** Max radius in pixel */
+    @JvmDefault
+    val maxRadius: Float
+        get() = roundableState.maxRadius
+
+    /** Current top corner in pixel, based on [topRoundness] and [maxRadius] */
+    @JvmDefault
+    val topCornerRadius: Float
+        get() = topRoundness * maxRadius
+
+    /** Current bottom corner in pixel, based on [bottomRoundness] and [maxRadius] */
+    @JvmDefault
+    val bottomCornerRadius: Float
+        get() = bottomRoundness * maxRadius
+
+    /** Get and update the current radii */
+    @JvmDefault
+    val updatedRadii: FloatArray
+        get() =
+            roundableState.radiiBuffer.also { radii ->
+                updateRadii(
+                    topCornerRadius = topCornerRadius,
+                    bottomCornerRadius = bottomCornerRadius,
+                    radii = radii,
+                )
+            }
+
+    /**
+     * Request the top roundness [value] for a specific [sourceType].
+     *
+     * The top roundness of a [Roundable] can be defined by different [sourceType]. In case more
+     * origins require different roundness, for the same property, the maximum value will always be
+     * chosen.
+     *
+     * @param value a value between 0f and 1f.
+     * @param animate true if it should animate to that value.
+     * @param sourceType the source from which the request for roundness comes.
+     * @return Whether the roundness was changed.
+     */
+    @JvmDefault
+    fun requestTopRoundness(
+        @FloatRange(from = 0.0, to = 1.0) value: Float,
+        animate: Boolean,
+        sourceType: SourceType,
+    ): Boolean {
+        val roundnessMap = roundableState.topRoundnessMap
+        val lastValue = roundnessMap.values.maxOrNull() ?: 0f
+        if (value == 0f) {
+            // we should only take the largest value, and since the smallest value is 0f, we can
+            // remove this value from the list. In the worst case, the list is empty and the
+            // default value is 0f.
+            roundnessMap.remove(sourceType)
+        } else {
+            roundnessMap[sourceType] = value
+        }
+        val newValue = roundnessMap.values.maxOrNull() ?: 0f
+
+        if (lastValue != newValue) {
+            val wasAnimating = roundableState.isTopAnimating()
+
+            // Fail safe:
+            // when we've been animating previously and we're now getting an update in the
+            // other direction, make sure to animate it too, otherwise, the localized updating
+            // may make the start larger than 1.0.
+            val shouldAnimate = wasAnimating && abs(newValue - lastValue) > 0.5f
+
+            roundableState.setTopRoundness(value = newValue, animated = shouldAnimate || animate)
+            return true
+        }
+        return false
+    }
+
+    /**
+     * Request the bottom roundness [value] for a specific [sourceType].
+     *
+     * The bottom roundness of a [Roundable] can be defined by different [sourceType]. In case more
+     * origins require different roundness, for the same property, the maximum value will always be
+     * chosen.
+     *
+     * @param value value between 0f and 1f.
+     * @param animate true if it should animate to that value.
+     * @param sourceType the source from which the request for roundness comes.
+     * @return Whether the roundness was changed.
+     */
+    @JvmDefault
+    fun requestBottomRoundness(
+        @FloatRange(from = 0.0, to = 1.0) value: Float,
+        animate: Boolean,
+        sourceType: SourceType,
+    ): Boolean {
+        val roundnessMap = roundableState.bottomRoundnessMap
+        val lastValue = roundnessMap.values.maxOrNull() ?: 0f
+        if (value == 0f) {
+            // we should only take the largest value, and since the smallest value is 0f, we can
+            // remove this value from the list. In the worst case, the list is empty and the
+            // default value is 0f.
+            roundnessMap.remove(sourceType)
+        } else {
+            roundnessMap[sourceType] = value
+        }
+        val newValue = roundnessMap.values.maxOrNull() ?: 0f
+
+        if (lastValue != newValue) {
+            val wasAnimating = roundableState.isBottomAnimating()
+
+            // Fail safe:
+            // when we've been animating previously and we're now getting an update in the
+            // other direction, make sure to animate it too, otherwise, the localized updating
+            // may make the start larger than 1.0.
+            val shouldAnimate = wasAnimating && abs(newValue - lastValue) > 0.5f
+
+            roundableState.setBottomRoundness(value = newValue, animated = shouldAnimate || animate)
+            return true
+        }
+        return false
+    }
+
+    /** Apply the roundness changes, usually means invalidate the [RoundableState.targetView]. */
+    @JvmDefault
+    fun applyRoundness() {
+        roundableState.targetView.invalidate()
+    }
+
+    /** @return true if top or bottom roundness is not zero. */
+    @JvmDefault
+    fun hasRoundedCorner(): Boolean {
+        return topRoundness != 0f || bottomRoundness != 0f
+    }
+
+    /**
+     * Update an Array of 8 values, 4 pairs of [X,Y] radii. As expected by param radii of
+     * [android.graphics.Path.addRoundRect].
+     *
+     * This method reuses the previous [radii] for performance reasons.
+     */
+    @JvmDefault
+    fun updateRadii(
+        topCornerRadius: Float,
+        bottomCornerRadius: Float,
+        radii: FloatArray,
+    ) {
+        if (radii.size != 8) error("Unexpected radiiBuffer size ${radii.size}")
+
+        if (radii[0] != topCornerRadius || radii[4] != bottomCornerRadius) {
+            (0..3).forEach { radii[it] = topCornerRadius }
+            (4..7).forEach { radii[it] = bottomCornerRadius }
+        }
+    }
+}
+
+/**
+ * State object for a `Roundable` class.
+ * @param targetView Will handle the [AnimatableProperty]
+ * @param roundable Target of the radius animation
+ * @param maxRadius Max corner radius in pixels
+ */
+class RoundableState(
+    internal val targetView: View,
+    roundable: Roundable,
+    internal val maxRadius: Float,
+) {
+    /** Animatable for top roundness */
+    private val topAnimatable = topAnimatable(roundable)
+
+    /** Animatable for bottom roundness */
+    private val bottomAnimatable = bottomAnimatable(roundable)
+
+    /** Current top roundness. Use [setTopRoundness] to update this value */
+    @set:FloatRange(from = 0.0, to = 1.0)
+    internal var topRoundness = 0f
+        private set
+
+    /** Current bottom roundness. Use [setBottomRoundness] to update this value */
+    @set:FloatRange(from = 0.0, to = 1.0)
+    internal var bottomRoundness = 0f
+        private set
+
+    /** Last requested top roundness associated by [SourceType] */
+    internal val topRoundnessMap = mutableMapOf<SourceType, Float>()
+
+    /** Last requested bottom roundness associated by [SourceType] */
+    internal val bottomRoundnessMap = mutableMapOf<SourceType, Float>()
+
+    /** Last cached radii */
+    internal val radiiBuffer = FloatArray(8)
+
+    /** Is top roundness animation in progress? */
+    internal fun isTopAnimating() = PropertyAnimator.isAnimating(targetView, topAnimatable)
+
+    /** Is bottom roundness animation in progress? */
+    internal fun isBottomAnimating() = PropertyAnimator.isAnimating(targetView, bottomAnimatable)
+
+    /** Set the current top roundness */
+    internal fun setTopRoundness(
+        value: Float,
+        animated: Boolean = targetView.isShown,
+    ) {
+        PropertyAnimator.setProperty(targetView, topAnimatable, value, DURATION, animated)
+    }
+
+    /** Set the current bottom roundness */
+    internal fun setBottomRoundness(
+        value: Float,
+        animated: Boolean = targetView.isShown,
+    ) {
+        PropertyAnimator.setProperty(targetView, bottomAnimatable, value, DURATION, animated)
+    }
+
+    companion object {
+        private val DURATION: AnimationProperties =
+            AnimationProperties()
+                .setDuration(StackStateAnimator.ANIMATION_DURATION_CORNER_RADIUS.toLong())
+
+        private fun topAnimatable(roundable: Roundable): AnimatableProperty =
+            AnimatableProperty.from(
+                object : FloatProperty<View>("topRoundness") {
+                    override fun get(view: View): Float = roundable.topRoundness
+
+                    override fun setValue(view: View, value: Float) {
+                        roundable.roundableState.topRoundness = value
+                        roundable.applyRoundness()
+                    }
+                },
+                R.id.top_roundess_animator_tag,
+                R.id.top_roundess_animator_end_tag,
+                R.id.top_roundess_animator_start_tag,
+            )
+
+        private fun bottomAnimatable(roundable: Roundable): AnimatableProperty =
+            AnimatableProperty.from(
+                object : FloatProperty<View>("bottomRoundness") {
+                    override fun get(view: View): Float = roundable.bottomRoundness
+
+                    override fun setValue(view: View, value: Float) {
+                        roundable.roundableState.bottomRoundness = value
+                        roundable.applyRoundness()
+                    }
+                },
+                R.id.bottom_roundess_animator_tag,
+                R.id.bottom_roundess_animator_end_tag,
+                R.id.bottom_roundess_animator_start_tag,
+            )
+    }
+}
+
+enum class SourceType {
+    DefaultValue,
+    OnDismissAnimation,
+    OnScroll,
+}
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/ActivatableNotificationView.java b/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/ActivatableNotificationView.java
index 755e3e1a208e..d29298a2f637 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/ActivatableNotificationView.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/ActivatableNotificationView.java
@@ -613,22 +613,21 @@ public abstract class ActivatableNotificationView extends ExpandableOutlineView
     protected void resetAllContentAlphas() {}
 
     @Override
-    protected void applyRoundness() {
+    public void applyRoundness() {
         super.applyRoundness();
-        applyBackgroundRoundness(getCurrentBackgroundRadiusTop(),
-                getCurrentBackgroundRadiusBottom());
+        applyBackgroundRoundness(getTopCornerRadius(), getBottomCornerRadius());
     }
 
     @Override
-    public float getCurrentBackgroundRadiusTop() {
+    public float getTopCornerRadius() {
         float fraction = getInterpolatedAppearAnimationFraction();
-        return MathUtils.lerp(0, super.getCurrentBackgroundRadiusTop(), fraction);
+        return MathUtils.lerp(0, super.getTopCornerRadius(), fraction);
     }
 
     @Override
-    public float getCurrentBackgroundRadiusBottom() {
+    public float getBottomCornerRadius() {
         float fraction = getInterpolatedAppearAnimationFraction();
-        return MathUtils.lerp(0, super.getCurrentBackgroundRadiusBottom(), fraction);
+        return MathUtils.lerp(0, super.getBottomCornerRadius(), fraction);
     }
 
     private void applyBackgroundRoundness(float topRadius, float bottomRadius) {
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/ExpandableNotificationRow.java b/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/ExpandableNotificationRow.java
index 087dc71f6cf2..9e7717caf69c 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/ExpandableNotificationRow.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/ExpandableNotificationRow.java
@@ -93,6 +93,7 @@ import com.android.systemui.statusbar.notification.LaunchAnimationParameters;
 import com.android.systemui.statusbar.notification.NotificationFadeAware;
 import com.android.systemui.statusbar.notification.NotificationLaunchAnimatorController;
 import com.android.systemui.statusbar.notification.NotificationUtils;
+import com.android.systemui.statusbar.notification.SourceType;
 import com.android.systemui.statusbar.notification.collection.NotificationEntry;
 import com.android.systemui.statusbar.notification.collection.render.GroupExpansionManager;
 import com.android.systemui.statusbar.notification.collection.render.GroupMembershipManager;
@@ -154,7 +155,9 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
         void onLayout();
     }
 
-    /** Listens for changes to the expansion state of this row. */
+    /**
+     * Listens for changes to the expansion state of this row.
+     */
     public interface OnExpansionChangedListener {
         void onExpansionChanged(boolean isExpanded);
     }
@@ -183,22 +186,34 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
     private int mNotificationLaunchHeight;
     private boolean mMustStayOnScreen;
 
-    /** Does this row contain layouts that can adapt to row expansion */
+    /**
+     * Does this row contain layouts that can adapt to row expansion
+     */
     private boolean mExpandable;
-    /** Has the user actively changed the expansion state of this row */
+    /**
+     * Has the user actively changed the expansion state of this row
+     */
     private boolean mHasUserChangedExpansion;
-    /** If {@link #mHasUserChangedExpansion}, has the user expanded this row */
+    /**
+     * If {@link #mHasUserChangedExpansion}, has the user expanded this row
+     */
     private boolean mUserExpanded;
-    /** Whether the blocking helper is showing on this notification (even if dismissed) */
+    /**
+     * Whether the blocking helper is showing on this notification (even if dismissed)
+     */
     private boolean mIsBlockingHelperShowing;
 
     /**
      * Has this notification been expanded while it was pinned
      */
     private boolean mExpandedWhenPinned;
-    /** Is the user touching this row */
+    /**
+     * Is the user touching this row
+     */
     private boolean mUserLocked;
-    /** Are we showing the "public" version */
+    /**
+     * Are we showing the "public" version
+     */
     private boolean mShowingPublic;
     private boolean mSensitive;
     private boolean mSensitiveHiddenInGeneral;
@@ -351,11 +366,14 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
     private boolean mWasChildInGroupWhenRemoved;
     private NotificationInlineImageResolver mImageResolver;
     private NotificationMediaManager mMediaManager;
-    @Nullable private OnExpansionChangedListener mExpansionChangedListener;
-    @Nullable private Runnable mOnIntrinsicHeightReachedRunnable;
+    @Nullable
+    private OnExpansionChangedListener mExpansionChangedListener;
+    @Nullable
+    private Runnable mOnIntrinsicHeightReachedRunnable;
 
     private float mTopRoundnessDuringLaunchAnimation;
     private float mBottomRoundnessDuringLaunchAnimation;
+    private boolean mIsNotificationGroupCornerEnabled;
 
     /**
      * Returns whether the given {@code statusBarNotification} is a system notification.
@@ -574,14 +592,18 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
         }
     }
 
-    /** Called when the notification's ranking was changed (but nothing else changed). */
+    /**
+     * Called when the notification's ranking was changed (but nothing else changed).
+     */
     public void onNotificationRankingUpdated() {
         if (mMenuRow != null) {
             mMenuRow.onNotificationUpdated(mEntry.getSbn());
         }
     }
 
-    /** Call when bubble state has changed and the button on the notification should be updated. */
+    /**
+     * Call when bubble state has changed and the button on the notification should be updated.
+     */
     public void updateBubbleButton() {
         for (NotificationContentView l : mLayouts) {
             l.updateBubbleButton(mEntry);
@@ -620,6 +642,7 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
 
     /**
      * Sets a supplier that can determine whether the keyguard is secure or not.
+     *
      * @param secureStateProvider A function that returns true if keyguard is secure.
      */
     public void setSecureStateProvider(BooleanSupplier secureStateProvider) {
@@ -781,7 +804,9 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
         mChildrenContainer.setUntruncatedChildCount(childCount);
     }
 
-    /** Called after children have been attached to set the expansion states */
+    /**
+     * Called after children have been attached to set the expansion states
+     */
     public void resetChildSystemExpandedStates() {
         if (isSummaryWithChildren()) {
             mChildrenContainer.updateExpansionStates();
@@ -791,7 +816,7 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
     /**
      * Add a child notification to this view.
      *
-     * @param row the row to add
+     * @param row        the row to add
      * @param childIndex the index to add it at, if -1 it will be added at the end
      */
     public void addChildNotification(ExpandableNotificationRow row, int childIndex) {
@@ -809,10 +834,12 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
         }
         onAttachedChildrenCountChanged();
         row.setIsChildInGroup(false, null);
-        row.setBottomRoundness(0.0f, false /* animate */);
+        row.requestBottomRoundness(0.0f, /* animate = */ false, SourceType.DefaultValue);
     }
 
-    /** Returns the child notification at [index], or null if no such child. */
+    /**
+     * Returns the child notification at [index], or null if no such child.
+     */
     @Nullable
     public ExpandableNotificationRow getChildNotificationAt(int index) {
         if (mChildrenContainer == null
@@ -834,7 +861,7 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
 
     /**
      * @param isChildInGroup Is this notification now in a group
-     * @param parent the new parent notification
+     * @param parent         the new parent notification
      */
     public void setIsChildInGroup(boolean isChildInGroup, ExpandableNotificationRow parent) {
         if (mExpandAnimationRunning && !isChildInGroup && mNotificationParent != null) {
@@ -898,7 +925,9 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
         return mChildrenContainer == null ? null : mChildrenContainer.getAttachedChildren();
     }
 
-    /** Updates states of all children. */
+    /**
+     * Updates states of all children.
+     */
     public void updateChildrenStates(AmbientState ambientState) {
         if (mIsSummaryWithChildren) {
             ExpandableViewState parentState = getViewState();
@@ -906,21 +935,27 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
         }
     }
 
-    /** Applies children states. */
+    /**
+     * Applies children states.
+     */
     public void applyChildrenState() {
         if (mIsSummaryWithChildren) {
             mChildrenContainer.applyState();
         }
     }
 
-    /** Prepares expansion changed. */
+    /**
+     * Prepares expansion changed.
+     */
     public void prepareExpansionChanged() {
         if (mIsSummaryWithChildren) {
             mChildrenContainer.prepareExpansionChanged();
         }
     }
 
-    /** Starts child animations. */
+    /**
+     * Starts child animations.
+     */
     public void startChildAnimation(AnimationProperties properties) {
         if (mIsSummaryWithChildren) {
             mChildrenContainer.startAnimationToState(properties);
@@ -984,7 +1019,7 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
         if (mIsSummaryWithChildren) {
             return mChildrenContainer.getIntrinsicHeight();
         }
-        if(mExpandedWhenPinned) {
+        if (mExpandedWhenPinned) {
             return Math.max(getMaxExpandHeight(), getHeadsUpHeight());
         } else if (atLeastMinHeight) {
             return Math.max(getCollapsedHeight(), getHeadsUpHeight());
@@ -1079,18 +1114,22 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
         updateClickAndFocus();
     }
 
-    /** The click listener for the bubble button. */
+    /**
+     * The click listener for the bubble button.
+     */
     public View.OnClickListener getBubbleClickListener() {
         return v -> {
             if (mBubblesManagerOptional.isPresent()) {
                 mBubblesManagerOptional.get()
-                    .onUserChangedBubble(mEntry, !mEntry.isBubble() /* createBubble */);
+                        .onUserChangedBubble(mEntry, !mEntry.isBubble() /* createBubble */);
             }
             mHeadsUpManager.removeNotification(mEntry.getKey(), true /* releaseImmediately */);
         };
     }
 
-    /** The click listener for the snooze button. */
+    /**
+     * The click listener for the snooze button.
+     */
     public View.OnClickListener getSnoozeClickListener(MenuItem item) {
         return v -> {
             // Dismiss a snoozed notification if one is still left behind
@@ -1252,7 +1291,7 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
     }
 
     public void setContentBackground(int customBackgroundColor, boolean animate,
-            NotificationContentView notificationContentView) {
+                                     NotificationContentView notificationContentView) {
         if (getShowingLayout() == notificationContentView) {
             setTintColor(customBackgroundColor, animate);
         }
@@ -1637,7 +1676,9 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
         setTargetPoint(null);
     }
 
-    /** Shows the given feedback icon, or hides the icon if null. */
+    /**
+     * Shows the given feedback icon, or hides the icon if null.
+     */
     public void setFeedbackIcon(@Nullable FeedbackIcon icon) {
         if (mIsSummaryWithChildren) {
             mChildrenContainer.setFeedbackIcon(icon);
@@ -1646,7 +1687,9 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
         mPublicLayout.setFeedbackIcon(icon);
     }
 
-    /** Sets the last time the notification being displayed audibly alerted the user. */
+    /**
+     * Sets the last time the notification being displayed audibly alerted the user.
+     */
     public void setLastAudiblyAlertedMs(long lastAudiblyAlertedMs) {
         long timeSinceAlertedAudibly = System.currentTimeMillis() - lastAudiblyAlertedMs;
         boolean alertedRecently = timeSinceAlertedAudibly < RECENTLY_ALERTED_THRESHOLD_MS;
@@ -1700,7 +1743,9 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
         Trace.endSection();
     }
 
-    /** Generates and appends "(MessagingStyle)" type tag to passed string for tracing. */
+    /**
+     * Generates and appends "(MessagingStyle)" type tag to passed string for tracing.
+     */
     @NonNull
     private String appendTraceStyleTag(@NonNull String traceTag) {
         if (!Trace.isEnabled()) {
@@ -1721,7 +1766,7 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
         super.onFinishInflate();
         mPublicLayout = findViewById(R.id.expandedPublic);
         mPrivateLayout = findViewById(R.id.expanded);
-        mLayouts = new NotificationContentView[] {mPrivateLayout, mPublicLayout};
+        mLayouts = new NotificationContentView[]{mPrivateLayout, mPublicLayout};
 
         for (NotificationContentView l : mLayouts) {
             l.setExpandClickListener(mExpandClickListener);
@@ -1740,6 +1785,7 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
             mChildrenContainer.setIsLowPriority(mIsLowPriority);
             mChildrenContainer.setContainingNotification(ExpandableNotificationRow.this);
             mChildrenContainer.onNotificationUpdated();
+            mChildrenContainer.enableNotificationGroupCorner(mIsNotificationGroupCornerEnabled);
 
             mTranslateableViews.add(mChildrenContainer);
         });
@@ -1796,6 +1842,7 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
     /**
      * Perform a smart action which triggers a longpress (expose guts).
      * Based on the semanticAction passed, may update the state of the guts view.
+     *
      * @param semanticAction associated with this smart action click
      */
     public void doSmartActionClick(int x, int y, int semanticAction) {
@@ -1939,9 +1986,10 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
 
     /**
      * Set the dismiss behavior of the view.
+     *
      * @param usingRowTranslationX {@code true} if the view should translate using regular
-     *                                          translationX, otherwise the contents will be
-     *                                          translated.
+     *                             translationX, otherwise the contents will be
+     *                             translated.
      */
     @Override
     public void setDismissUsingRowTranslationX(boolean usingRowTranslationX) {
@@ -1955,6 +2003,14 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
             if (previousTranslation != 0) {
                 setTranslation(previousTranslation);
             }
+            if (mChildrenContainer != null) {
+                List<ExpandableNotificationRow> notificationChildren =
+                        mChildrenContainer.getAttachedChildren();
+                for (int i = 0; i < notificationChildren.size(); i++) {
+                    ExpandableNotificationRow child = notificationChildren.get(i);
+                    child.setDismissUsingRowTranslationX(usingRowTranslationX);
+                }
+            }
         }
     }
 
@@ -2009,7 +2065,7 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
     }
 
     public Animator getTranslateViewAnimator(final float leftTarget,
-            AnimatorUpdateListener listener) {
+                                             AnimatorUpdateListener listener) {
         if (mTranslateAnim != null) {
             mTranslateAnim.cancel();
         }
@@ -2115,7 +2171,7 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
                             NotificationLaunchAnimatorController.ANIMATION_DURATION_TOP_ROUNDING));
             float startTop = params.getStartNotificationTop();
             top = (int) Math.min(MathUtils.lerp(startTop,
-                    params.getTop(), expandProgress),
+                            params.getTop(), expandProgress),
                     startTop);
         } else {
             top = params.getTop();
@@ -2151,29 +2207,30 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
         }
         setTranslationY(top);
 
-        mTopRoundnessDuringLaunchAnimation = params.getTopCornerRadius() / mOutlineRadius;
-        mBottomRoundnessDuringLaunchAnimation = params.getBottomCornerRadius() / mOutlineRadius;
+        final float maxRadius = getMaxRadius();
+        mTopRoundnessDuringLaunchAnimation = params.getTopCornerRadius() / maxRadius;
+        mBottomRoundnessDuringLaunchAnimation = params.getBottomCornerRadius() / maxRadius;
         invalidateOutline();
 
         mBackgroundNormal.setExpandAnimationSize(params.getWidth(), actualHeight);
     }
 
     @Override
-    public float getCurrentTopRoundness() {
+    public float getTopRoundness() {
         if (mExpandAnimationRunning) {
             return mTopRoundnessDuringLaunchAnimation;
         }
 
-        return super.getCurrentTopRoundness();
+        return super.getTopRoundness();
     }
 
     @Override
-    public float getCurrentBottomRoundness() {
+    public float getBottomRoundness() {
         if (mExpandAnimationRunning) {
             return mBottomRoundnessDuringLaunchAnimation;
         }
 
-        return super.getCurrentBottomRoundness();
+        return super.getBottomRoundness();
     }
 
     public void setExpandAnimationRunning(boolean expandAnimationRunning) {
@@ -2284,7 +2341,7 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
     /**
      * Set this notification to be expanded by the user
      *
-     * @param userExpanded whether the user wants this notification to be expanded
+     * @param userExpanded        whether the user wants this notification to be expanded
      * @param allowChildExpansion whether a call to this method allows expanding children
      */
     public void setUserExpanded(boolean userExpanded, boolean allowChildExpansion) {
@@ -2434,7 +2491,7 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
 
     /**
      * @return {@code true} if the notification can show it's heads up layout. This is mostly true
-     *         except for legacy use cases.
+     * except for legacy use cases.
      */
     public boolean canShowHeadsUp() {
         if (mOnKeyguard && !isDozing() && !isBypassEnabled()) {
@@ -2625,7 +2682,7 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
 
     @Override
     public void setHideSensitive(boolean hideSensitive, boolean animated, long delay,
-            long duration) {
+                                 long duration) {
         if (getVisibility() == GONE) {
             // If we are GONE, the hideSensitive parameter will not be calculated and always be
             // false, which is incorrect, let's wait until a real call comes in later.
@@ -2658,9 +2715,9 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
 
     private void animateShowingPublic(long delay, long duration, boolean showingPublic) {
         View[] privateViews = mIsSummaryWithChildren
-                ? new View[] {mChildrenContainer}
-                : new View[] {mPrivateLayout};
-        View[] publicViews = new View[] {mPublicLayout};
+                ? new View[]{mChildrenContainer}
+                : new View[]{mPrivateLayout};
+        View[] publicViews = new View[]{mPublicLayout};
         View[] hiddenChildren = showingPublic ? privateViews : publicViews;
         View[] shownChildren = showingPublic ? publicViews : privateViews;
         for (final View hiddenView : hiddenChildren) {
@@ -2693,8 +2750,8 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
 
     /**
      * @return Whether this view is allowed to be dismissed. Only valid for visible notifications as
-     *         otherwise some state might not be updated. To request about the general clearability
-     *         see {@link NotificationEntry#isDismissable()}.
+     * otherwise some state might not be updated. To request about the general clearability
+     * see {@link NotificationEntry#isDismissable()}.
      */
     public boolean canViewBeDismissed() {
         return mEntry.isDismissable() && (!shouldShowPublic() || !mSensitiveHiddenInGeneral);
@@ -2777,8 +2834,13 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
     }
 
     @Override
-    public long performRemoveAnimation(long duration, long delay, float translationDirection,
-            boolean isHeadsUpAnimation, float endLocation, Runnable onFinishedRunnable,
+    public long performRemoveAnimation(
+            long duration,
+            long delay,
+            float translationDirection,
+            boolean isHeadsUpAnimation,
+            float endLocation,
+            Runnable onFinishedRunnable,
             AnimatorListenerAdapter animationListener) {
         if (mMenuRow != null && mMenuRow.isMenuVisible()) {
             Animator anim = getTranslateViewAnimator(0f, null /* listener */);
@@ -2828,7 +2890,9 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
         }
     }
 
-    /** Gets the last value set with {@link #setNotificationFaded(boolean)} */
+    /**
+     * Gets the last value set with {@link #setNotificationFaded(boolean)}
+     */
     @Override
     public boolean isNotificationFaded() {
         return mIsFaded;
@@ -2843,7 +2907,7 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
      * notifications return false from {@link #hasOverlappingRendering()} and delegate the
      * layerType to child views which really need it in order to render correctly, such as icon
      * views or the conversation face pile.
-     *
+     * <p>
      * Another compounding factor for notifications is that we change clipping on each frame of the
      * animation, so the hardware layer isn't able to do any caching at the top level, but the
      * individual elements we render with hardware layers (e.g. icons) cache wonderfully because we
@@ -2869,7 +2933,9 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
         }
     }
 
-    /** Private helper for iterating over the layouts and children containers to set faded state */
+    /**
+     * Private helper for iterating over the layouts and children containers to set faded state
+     */
     private void setNotificationFadedOnChildren(boolean faded) {
         delegateNotificationFaded(mChildrenContainer, faded);
         for (NotificationContentView layout : mLayouts) {
@@ -2897,7 +2963,7 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
      * Because RemoteInputView is designed to be an opaque view that overlaps the Actions row, the
      * row should require overlapping rendering to ensure that the overlapped view doesn't bleed
      * through when alpha fading.
-     *
+     * <p>
      * Note that this currently works for top-level notifications which squish their height down
      * while collapsing the shade, but does not work for children inside groups, because the
      * accordion affect does not apply to those views, so super.hasOverlappingRendering() will
@@ -2976,7 +3042,7 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
             return mGuts.getIntrinsicHeight();
         } else if (!ignoreTemporaryStates && canShowHeadsUp() && mIsHeadsUp
                 && mHeadsUpManager.isTrackingHeadsUp()) {
-                return getPinnedHeadsUpHeight(false /* atLeastMinHeight */);
+            return getPinnedHeadsUpHeight(false /* atLeastMinHeight */);
         } else if (mIsSummaryWithChildren && !isGroupExpanded() && !shouldShowPublic()) {
             return mChildrenContainer.getMinHeight();
         } else if (!ignoreTemporaryStates && canShowHeadsUp() && mIsHeadsUp) {
@@ -3218,8 +3284,8 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
             MenuItem snoozeMenu = provider.getSnoozeMenuItem(getContext());
             if (snoozeMenu != null) {
                 AccessibilityAction action = new AccessibilityAction(R.id.action_snooze,
-                    getContext().getResources()
-                        .getString(R.string.notification_menu_snooze_action));
+                        getContext().getResources()
+                                .getString(R.string.notification_menu_snooze_action));
                 info.addAction(action);
             }
         }
@@ -3280,17 +3346,17 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
             NotificationContentView contentView = (NotificationContentView) child;
             if (isClippingNeeded()) {
                 return true;
-            } else if (!hasNoRounding()
-                    && contentView.shouldClipToRounding(getCurrentTopRoundness() != 0.0f,
-                    getCurrentBottomRoundness() != 0.0f)) {
+            } else if (hasRoundedCorner()
+                    && contentView.shouldClipToRounding(getTopRoundness() != 0.0f,
+                    getBottomRoundness() != 0.0f)) {
                 return true;
             }
         } else if (child == mChildrenContainer) {
-            if (isClippingNeeded() || !hasNoRounding()) {
+            if (isClippingNeeded() || hasRoundedCorner()) {
                 return true;
             }
         } else if (child instanceof NotificationGuts) {
-            return !hasNoRounding();
+            return hasRoundedCorner();
         }
         return super.childNeedsClipping(child);
     }
@@ -3316,14 +3382,17 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
     }
 
     @Override
-    protected void applyRoundness() {
+    public void applyRoundness() {
         super.applyRoundness();
         applyChildrenRoundness();
     }
 
     private void applyChildrenRoundness() {
         if (mIsSummaryWithChildren) {
-            mChildrenContainer.setCurrentBottomRoundness(getCurrentBottomRoundness());
+            mChildrenContainer.requestBottomRoundness(
+                    getBottomRoundness(),
+                    /* animate = */ false,
+                    SourceType.DefaultValue);
         }
     }
 
@@ -3335,10 +3404,6 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
         return super.getCustomClipPath(child);
     }
 
-    private boolean hasNoRounding() {
-        return getCurrentBottomRoundness() == 0.0f && getCurrentTopRoundness() == 0.0f;
-    }
-
     public boolean isMediaRow() {
         return mEntry.getSbn().getNotification().isMediaNotification();
     }
@@ -3434,6 +3499,7 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
     public interface LongPressListener {
         /**
          * Equivalent to {@link View.OnLongClickListener#onLongClick(View)} with coordinates
+         *
          * @return whether the longpress was handled
          */
         boolean onLongPress(View v, int x, int y, MenuItem item);
@@ -3455,6 +3521,7 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
     public interface CoordinateOnClickListener {
         /**
          * Equivalent to {@link View.OnClickListener#onClick(View)} with coordinates
+         *
          * @return whether the click was handled
          */
         boolean onClick(View v, int x, int y, MenuItem item);
@@ -3511,7 +3578,19 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
     private void setTargetPoint(Point p) {
         mTargetPoint = p;
     }
+
     public Point getTargetPoint() {
         return mTargetPoint;
     }
+
+    /**
+     * Enable the support for rounded corner in notification group
+     * @param enabled true if is supported
+     */
+    public void enableNotificationGroupCorner(boolean enabled) {
+        mIsNotificationGroupCornerEnabled = enabled;
+        if (mChildrenContainer != null) {
+            mChildrenContainer.enableNotificationGroupCorner(mIsNotificationGroupCornerEnabled);
+        }
+    }
 }
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/ExpandableNotificationRowController.java b/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/ExpandableNotificationRowController.java
index a493a676e3d8..842526ee0371 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/ExpandableNotificationRowController.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/ExpandableNotificationRowController.java
@@ -231,6 +231,8 @@ public class ExpandableNotificationRowController implements NotifViewController
                 mStatusBarStateController.removeCallback(mStatusBarStateListener);
             }
         });
+        mView.enableNotificationGroupCorner(
+                mFeatureFlags.isEnabled(Flags.NOTIFICATION_GROUP_CORNER));
     }
 
     private final StatusBarStateController.StateListener mStatusBarStateListener =
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/ExpandableOutlineView.java b/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/ExpandableOutlineView.java
index d58fe3b3c4a3..4fde5d06f816 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/ExpandableOutlineView.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/ExpandableOutlineView.java
@@ -28,46 +28,21 @@ import android.view.View;
 import android.view.ViewOutlineProvider;
 
 import com.android.systemui.R;
-import com.android.systemui.statusbar.notification.AnimatableProperty;
-import com.android.systemui.statusbar.notification.PropertyAnimator;
-import com.android.systemui.statusbar.notification.stack.AnimationProperties;
-import com.android.systemui.statusbar.notification.stack.StackStateAnimator;
+import com.android.systemui.statusbar.notification.RoundableState;
+import com.android.systemui.statusbar.notification.stack.NotificationChildrenContainer;
 
 /**
  * Like {@link ExpandableView}, but setting an outline for the height and clipping.
  */
 public abstract class ExpandableOutlineView extends ExpandableView {
 
-    private static final AnimatableProperty TOP_ROUNDNESS = AnimatableProperty.from(
-            "topRoundness",
-            ExpandableOutlineView::setTopRoundnessInternal,
-            ExpandableOutlineView::getCurrentTopRoundness,
-            R.id.top_roundess_animator_tag,
-            R.id.top_roundess_animator_end_tag,
-            R.id.top_roundess_animator_start_tag);
-    private static final AnimatableProperty BOTTOM_ROUNDNESS = AnimatableProperty.from(
-            "bottomRoundness",
-            ExpandableOutlineView::setBottomRoundnessInternal,
-            ExpandableOutlineView::getCurrentBottomRoundness,
-            R.id.bottom_roundess_animator_tag,
-            R.id.bottom_roundess_animator_end_tag,
-            R.id.bottom_roundess_animator_start_tag);
-    private static final AnimationProperties ROUNDNESS_PROPERTIES =
-            new AnimationProperties().setDuration(
-                    StackStateAnimator.ANIMATION_DURATION_CORNER_RADIUS);
+    private RoundableState mRoundableState;
     private static final Path EMPTY_PATH = new Path();
-
     private final Rect mOutlineRect = new Rect();
-    private final Path mClipPath = new Path();
     private boolean mCustomOutline;
     private float mOutlineAlpha = -1f;
-    protected float mOutlineRadius;
     private boolean mAlwaysRoundBothCorners;
     private Path mTmpPath = new Path();
-    private float mCurrentBottomRoundness;
-    private float mCurrentTopRoundness;
-    private float mBottomRoundness;
-    private float mTopRoundness;
     private int mBackgroundTop;
 
     /**
@@ -80,8 +55,7 @@ public abstract class ExpandableOutlineView extends ExpandableView {
     private final ViewOutlineProvider mProvider = new ViewOutlineProvider() {
         @Override
         public void getOutline(View view, Outline outline) {
-            if (!mCustomOutline && getCurrentTopRoundness() == 0.0f
-                    && getCurrentBottomRoundness() == 0.0f && !mAlwaysRoundBothCorners) {
+            if (!mCustomOutline && !hasRoundedCorner() && !mAlwaysRoundBothCorners) {
                 // Only when translating just the contents, does the outline need to be shifted.
                 int translation = !mDismissUsingRowTranslationX ? (int) getTranslation() : 0;
                 int left = Math.max(translation, 0);
@@ -99,14 +73,18 @@ public abstract class ExpandableOutlineView extends ExpandableView {
         }
     };
 
+    @Override
+    public RoundableState getRoundableState() {
+        return mRoundableState;
+    }
+
     protected Path getClipPath(boolean ignoreTranslation) {
         int left;
         int top;
         int right;
         int bottom;
         int height;
-        float topRoundness = mAlwaysRoundBothCorners
-                ? mOutlineRadius : getCurrentBackgroundRadiusTop();
+        float topRoundness = mAlwaysRoundBothCorners ? getMaxRadius() : getTopCornerRadius();
         if (!mCustomOutline) {
             // The outline just needs to be shifted if we're translating the contents. Otherwise
             // it's already in the right place.
@@ -130,12 +108,11 @@ public abstract class ExpandableOutlineView extends ExpandableView {
         if (height == 0) {
             return EMPTY_PATH;
         }
-        float bottomRoundness = mAlwaysRoundBothCorners
-                ? mOutlineRadius : getCurrentBackgroundRadiusBottom();
+        float bottomRoundness = mAlwaysRoundBothCorners ? getMaxRadius() : getBottomCornerRadius();
         if (topRoundness + bottomRoundness > height) {
             float overShoot = topRoundness + bottomRoundness - height;
-            float currentTopRoundness = getCurrentTopRoundness();
-            float currentBottomRoundness = getCurrentBottomRoundness();
+            float currentTopRoundness = getTopRoundness();
+            float currentBottomRoundness = getBottomRoundness();
             topRoundness -= overShoot * currentTopRoundness
                     / (currentTopRoundness + currentBottomRoundness);
             bottomRoundness -= overShoot * currentBottomRoundness
@@ -145,8 +122,18 @@ public abstract class ExpandableOutlineView extends ExpandableView {
         return mTmpPath;
     }
 
-    public void getRoundedRectPath(int left, int top, int right, int bottom,
-            float topRoundness, float bottomRoundness, Path outPath) {
+    /**
+     * Add a round rect in {@code outPath}
+     * @param outPath destination path
+     */
+    public void getRoundedRectPath(
+            int left,
+            int top,
+            int right,
+            int bottom,
+            float topRoundness,
+            float bottomRoundness,
+            Path outPath) {
         outPath.reset();
         mTmpCornerRadii[0] = topRoundness;
         mTmpCornerRadii[1] = topRoundness;
@@ -168,15 +155,28 @@ public abstract class ExpandableOutlineView extends ExpandableView {
     @Override
     protected boolean drawChild(Canvas canvas, View child, long drawingTime) {
         canvas.save();
+        Path clipPath = null;
+        Path childClipPath = null;
         if (childNeedsClipping(child)) {
-            Path clipPath = getCustomClipPath(child);
+            clipPath = getCustomClipPath(child);
             if (clipPath == null) {
                 clipPath = getClipPath(false /* ignoreTranslation */);
             }
-            if (clipPath != null) {
-                canvas.clipPath(clipPath);
+            // If the notification uses "RowTranslationX" as dismiss behavior, we should clip the
+            // children instead.
+            if (mDismissUsingRowTranslationX && child instanceof NotificationChildrenContainer) {
+                childClipPath = clipPath;
+                clipPath = null;
             }
         }
+
+        if (child instanceof NotificationChildrenContainer) {
+            ((NotificationChildrenContainer) child).setChildClipPath(childClipPath);
+        }
+        if (clipPath != null) {
+            canvas.clipPath(clipPath);
+        }
+
         boolean result = super.drawChild(canvas, child, drawingTime);
         canvas.restore();
         return result;
@@ -207,73 +207,21 @@ public abstract class ExpandableOutlineView extends ExpandableView {
 
     private void initDimens() {
         Resources res = getResources();
-        mOutlineRadius = res.getDimension(R.dimen.notification_shadow_radius);
         mAlwaysRoundBothCorners = res.getBoolean(R.bool.config_clipNotificationsToOutline);
-        if (!mAlwaysRoundBothCorners) {
-            mOutlineRadius = res.getDimensionPixelSize(R.dimen.notification_corner_radius);
+        float maxRadius;
+        if (mAlwaysRoundBothCorners) {
+            maxRadius = res.getDimension(R.dimen.notification_shadow_radius);
+        } else {
+            maxRadius = res.getDimensionPixelSize(R.dimen.notification_corner_radius);
         }
+        mRoundableState = new RoundableState(this, this, maxRadius);
         setClipToOutline(mAlwaysRoundBothCorners);
     }
 
     @Override
-    public boolean setTopRoundness(float topRoundness, boolean animate) {
-        if (mTopRoundness != topRoundness) {
-            float diff = Math.abs(topRoundness - mTopRoundness);
-            mTopRoundness = topRoundness;
-            boolean shouldAnimate = animate;
-            if (PropertyAnimator.isAnimating(this, TOP_ROUNDNESS) && diff > 0.5f) {
-                // Fail safe:
-                // when we've been animating previously and we're now getting an update in the
-                // other direction, make sure to animate it too, otherwise, the localized updating
-                // may make the start larger than 1.0.
-                shouldAnimate = true;
-            }
-            PropertyAnimator.setProperty(this, TOP_ROUNDNESS, topRoundness,
-                    ROUNDNESS_PROPERTIES, shouldAnimate);
-            return true;
-        }
-        return false;
-    }
-
-    protected void applyRoundness() {
+    public void applyRoundness() {
         invalidateOutline();
-        invalidate();
-    }
-
-    public float getCurrentBackgroundRadiusTop() {
-        return getCurrentTopRoundness() * mOutlineRadius;
-    }
-
-    public float getCurrentTopRoundness() {
-        return mCurrentTopRoundness;
-    }
-
-    public float getCurrentBottomRoundness() {
-        return mCurrentBottomRoundness;
-    }
-
-    public float getCurrentBackgroundRadiusBottom() {
-        return getCurrentBottomRoundness() * mOutlineRadius;
-    }
-
-    @Override
-    public boolean setBottomRoundness(float bottomRoundness, boolean animate) {
-        if (mBottomRoundness != bottomRoundness) {
-            float diff = Math.abs(bottomRoundness - mBottomRoundness);
-            mBottomRoundness = bottomRoundness;
-            boolean shouldAnimate = animate;
-            if (PropertyAnimator.isAnimating(this, BOTTOM_ROUNDNESS) && diff > 0.5f) {
-                // Fail safe:
-                // when we've been animating previously and we're now getting an update in the
-                // other direction, make sure to animate it too, otherwise, the localized updating
-                // may make the start larger than 1.0.
-                shouldAnimate = true;
-            }
-            PropertyAnimator.setProperty(this, BOTTOM_ROUNDNESS, bottomRoundness,
-                    ROUNDNESS_PROPERTIES, shouldAnimate);
-            return true;
-        }
-        return false;
+        super.applyRoundness();
     }
 
     protected void setBackgroundTop(int backgroundTop) {
@@ -283,16 +231,6 @@ public abstract class ExpandableOutlineView extends ExpandableView {
         }
     }
 
-    private void setTopRoundnessInternal(float topRoundness) {
-        mCurrentTopRoundness = topRoundness;
-        applyRoundness();
-    }
-
-    private void setBottomRoundnessInternal(float bottomRoundness) {
-        mCurrentBottomRoundness = bottomRoundness;
-        applyRoundness();
-    }
-
     public void onDensityOrFontScaleChanged() {
         initDimens();
         applyRoundness();
@@ -348,9 +286,10 @@ public abstract class ExpandableOutlineView extends ExpandableView {
 
     /**
      * Set the dismiss behavior of the view.
+     *
      * @param usingRowTranslationX {@code true} if the view should translate using regular
-     *                                          translationX, otherwise the contents will be
-     *                                          translated.
+     *                             translationX, otherwise the contents will be
+     *                             translated.
      */
     public void setDismissUsingRowTranslationX(boolean usingRowTranslationX) {
         mDismissUsingRowTranslationX = usingRowTranslationX;
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/ExpandableView.java b/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/ExpandableView.java
index 38f0c550d4fc..955d7c18f870 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/ExpandableView.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/ExpandableView.java
@@ -36,6 +36,8 @@ import com.android.systemui.Dumpable;
 import com.android.systemui.R;
 import com.android.systemui.animation.Interpolators;
 import com.android.systemui.statusbar.StatusBarIconView;
+import com.android.systemui.statusbar.notification.Roundable;
+import com.android.systemui.statusbar.notification.RoundableState;
 import com.android.systemui.statusbar.notification.stack.ExpandableViewState;
 import com.android.systemui.statusbar.notification.stack.NotificationStackScrollLayout;
 import com.android.systemui.util.DumpUtilsKt;
@@ -47,9 +49,10 @@ import java.util.List;
 /**
  * An abstract view for expandable views.
  */
-public abstract class ExpandableView extends FrameLayout implements Dumpable {
+public abstract class ExpandableView extends FrameLayout implements Dumpable, Roundable {
     private static final String TAG = "ExpandableView";
 
+    private RoundableState mRoundableState = null;
     protected OnHeightChangedListener mOnHeightChangedListener;
     private int mActualHeight;
     protected int mClipTopAmount;
@@ -78,6 +81,14 @@ public abstract class ExpandableView extends FrameLayout implements Dumpable {
         initDimens();
     }
 
+    @Override
+    public RoundableState getRoundableState() {
+        if (mRoundableState == null) {
+            mRoundableState = new RoundableState(this, this, 0f);
+        }
+        return mRoundableState;
+    }
+
     private void initDimens() {
         mContentShift = getResources().getDimensionPixelSize(
                 R.dimen.shelf_transform_content_shift);
@@ -440,8 +451,7 @@ public abstract class ExpandableView extends FrameLayout implements Dumpable {
             int top = getClipTopAmount();
             int bottom = Math.max(Math.max(getActualHeight() + getExtraBottomPadding()
                     - mClipBottomAmount, top), mMinimumHeightForClipping);
-            int halfExtraWidth = (int) (mExtraWidthForClipping / 2.0f);
-            mClipRect.set(-halfExtraWidth, top, getWidth() + halfExtraWidth, bottom);
+            mClipRect.set(Integer.MIN_VALUE, top, Integer.MAX_VALUE, bottom);
             setClipBounds(mClipRect);
         } else {
             setClipBounds(null);
@@ -455,7 +465,6 @@ public abstract class ExpandableView extends FrameLayout implements Dumpable {
 
     public void setExtraWidthForClipping(float extraWidthForClipping) {
         mExtraWidthForClipping = extraWidthForClipping;
-        updateClipping();
     }
 
     public float getHeaderVisibleAmount() {
@@ -844,22 +853,6 @@ public abstract class ExpandableView extends FrameLayout implements Dumpable {
         return mFirstInSection;
     }
 
-    /**
-     * Set the topRoundness of this view.
-     * @return Whether the roundness was changed.
-     */
-    public boolean setTopRoundness(float topRoundness, boolean animate) {
-        return false;
-    }
-
-    /**
-     * Set the bottom roundness of this view.
-     * @return Whether the roundness was changed.
-     */
-    public boolean setBottomRoundness(float bottomRoundness, boolean animate) {
-        return false;
-    }
-
     public int getHeadsUpHeightWithoutHeader() {
         return getHeight();
     }
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/wrapper/NotificationHeaderViewWrapper.java b/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/wrapper/NotificationHeaderViewWrapper.java
index 7a654365e0ae..f13e48d55ae4 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/wrapper/NotificationHeaderViewWrapper.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/wrapper/NotificationHeaderViewWrapper.java
@@ -35,12 +35,15 @@ import androidx.annotation.Nullable;
 
 import com.android.internal.widget.CachingIconView;
 import com.android.internal.widget.NotificationExpandButton;
+import com.android.systemui.R;
 import com.android.systemui.animation.Interpolators;
 import com.android.systemui.statusbar.TransformableView;
 import com.android.systemui.statusbar.ViewTransformationHelper;
 import com.android.systemui.statusbar.notification.CustomInterpolatorTransformation;
 import com.android.systemui.statusbar.notification.FeedbackIcon;
 import com.android.systemui.statusbar.notification.ImageTransformState;
+import com.android.systemui.statusbar.notification.Roundable;
+import com.android.systemui.statusbar.notification.RoundableState;
 import com.android.systemui.statusbar.notification.TransformState;
 import com.android.systemui.statusbar.notification.row.ExpandableNotificationRow;
 
@@ -49,13 +52,12 @@ import java.util.Stack;
 /**
  * Wraps a notification view which may or may not include a header.
  */
-public class NotificationHeaderViewWrapper extends NotificationViewWrapper {
+public class NotificationHeaderViewWrapper extends NotificationViewWrapper implements Roundable {
 
+    private final RoundableState mRoundableState;
     private static final Interpolator LOW_PRIORITY_HEADER_CLOSE
             = new PathInterpolator(0.4f, 0f, 0.7f, 1f);
-
     protected final ViewTransformationHelper mTransformationHelper;
-
     private CachingIconView mIcon;
     private NotificationExpandButton mExpandButton;
     private View mAltExpandTarget;
@@ -67,12 +69,16 @@ public class NotificationHeaderViewWrapper extends NotificationViewWrapper {
     private ImageView mWorkProfileImage;
     private View mAudiblyAlertedIcon;
     private View mFeedbackIcon;
-
     private boolean mIsLowPriority;
     private boolean mTransformLowPriorityTitle;
 
     protected NotificationHeaderViewWrapper(Context ctx, View view, ExpandableNotificationRow row) {
         super(ctx, view, row);
+        mRoundableState = new RoundableState(
+                mView,
+                this,
+                ctx.getResources().getDimension(R.dimen.notification_corner_radius)
+        );
         mTransformationHelper = new ViewTransformationHelper();
 
         // we want to avoid that the header clashes with the other text when transforming
@@ -81,7 +87,8 @@ public class NotificationHeaderViewWrapper extends NotificationViewWrapper {
                 new CustomInterpolatorTransformation(TRANSFORMING_VIEW_TITLE) {
 
                     @Override
-                    public Interpolator getCustomInterpolator(int interpolationType,
+                    public Interpolator getCustomInterpolator(
+                            int interpolationType,
                             boolean isFrom) {
                         boolean isLowPriority = mView instanceof NotificationHeaderView;
                         if (interpolationType == TRANSFORM_Y) {
@@ -99,11 +106,17 @@ public class NotificationHeaderViewWrapper extends NotificationViewWrapper {
                     protected boolean hasCustomTransformation() {
                         return mIsLowPriority && mTransformLowPriorityTitle;
                     }
-                }, TRANSFORMING_VIEW_TITLE);
+                },
+                TRANSFORMING_VIEW_TITLE);
         resolveHeaderViews();
         addFeedbackOnClickListener(row);
     }
 
+    @Override
+    public RoundableState getRoundableState() {
+        return mRoundableState;
+    }
+
     protected void resolveHeaderViews() {
         mIcon = mView.findViewById(com.android.internal.R.id.icon);
         mHeaderText = mView.findViewById(com.android.internal.R.id.header_text);
@@ -128,7 +141,9 @@ public class NotificationHeaderViewWrapper extends NotificationViewWrapper {
         }
     }
 
-    /** Shows the given feedback icon, or hides the icon if null. */
+    /**
+     * Shows the given feedback icon, or hides the icon if null.
+     */
     @Override
     public void setFeedbackIcon(@Nullable FeedbackIcon icon) {
         if (mFeedbackIcon != null) {
@@ -193,7 +208,7 @@ public class NotificationHeaderViewWrapper extends NotificationViewWrapper {
                     // its animation
                     && child.getId() != com.android.internal.R.id.conversation_icon_badge_ring) {
                 ((ImageView) child).setCropToPadding(true);
-            } else if (child instanceof ViewGroup){
+            } else if (child instanceof ViewGroup) {
                 ViewGroup group = (ViewGroup) child;
                 for (int i = 0; i < group.getChildCount(); i++) {
                     stack.push(group.getChildAt(i));
@@ -215,7 +230,9 @@ public class NotificationHeaderViewWrapper extends NotificationViewWrapper {
     }
 
     @Override
-    public void updateExpandability(boolean expandable, View.OnClickListener onClickListener,
+    public void updateExpandability(
+            boolean expandable,
+            View.OnClickListener onClickListener,
             boolean requestLayout) {
         mExpandButton.setVisibility(expandable ? View.VISIBLE : View.GONE);
         mExpandButton.setOnClickListener(expandable ? onClickListener : null);
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/NotificationChildrenContainer.java b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/NotificationChildrenContainer.java
index 7b23a56af836..26f0ad9eca87 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/NotificationChildrenContainer.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/NotificationChildrenContainer.java
@@ -21,6 +21,9 @@ import android.content.Context;
 import android.content.res.Configuration;
 import android.content.res.Resources;
 import android.content.res.TypedArray;
+import android.graphics.Canvas;
+import android.graphics.Path;
+import android.graphics.Path.Direction;
 import android.graphics.drawable.ColorDrawable;
 import android.service.notification.StatusBarNotification;
 import android.util.AttributeSet;
@@ -33,6 +36,7 @@ import android.view.ViewGroup;
 import android.widget.RemoteViews;
 import android.widget.TextView;
 
+import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 
 import com.android.internal.annotations.VisibleForTesting;
@@ -43,10 +47,14 @@ import com.android.systemui.statusbar.NotificationGroupingUtil;
 import com.android.systemui.statusbar.notification.FeedbackIcon;
 import com.android.systemui.statusbar.notification.NotificationFadeAware;
 import com.android.systemui.statusbar.notification.NotificationUtils;
+import com.android.systemui.statusbar.notification.Roundable;
+import com.android.systemui.statusbar.notification.RoundableState;
+import com.android.systemui.statusbar.notification.SourceType;
 import com.android.systemui.statusbar.notification.row.ExpandableNotificationRow;
 import com.android.systemui.statusbar.notification.row.ExpandableView;
 import com.android.systemui.statusbar.notification.row.HybridGroupManager;
 import com.android.systemui.statusbar.notification.row.HybridNotificationView;
+import com.android.systemui.statusbar.notification.row.wrapper.NotificationHeaderViewWrapper;
 import com.android.systemui.statusbar.notification.row.wrapper.NotificationViewWrapper;
 
 import java.util.ArrayList;
@@ -56,7 +64,7 @@ import java.util.List;
  * A container containing child notifications
  */
 public class NotificationChildrenContainer extends ViewGroup
-        implements NotificationFadeAware {
+        implements NotificationFadeAware, Roundable {
 
     private static final String TAG = "NotificationChildrenContainer";
 
@@ -100,9 +108,9 @@ public class NotificationChildrenContainer extends ViewGroup
     private boolean mEnableShadowOnChildNotifications;
 
     private NotificationHeaderView mNotificationHeader;
-    private NotificationViewWrapper mNotificationHeaderWrapper;
+    private NotificationHeaderViewWrapper mNotificationHeaderWrapper;
     private NotificationHeaderView mNotificationHeaderLowPriority;
-    private NotificationViewWrapper mNotificationHeaderWrapperLowPriority;
+    private NotificationHeaderViewWrapper mNotificationHeaderWrapperLowPriority;
     private NotificationGroupingUtil mGroupingUtil;
     private ViewState mHeaderViewState;
     private int mClipBottomAmount;
@@ -110,7 +118,8 @@ public class NotificationChildrenContainer extends ViewGroup
     private OnClickListener mHeaderClickListener;
     private ViewGroup mCurrentHeader;
     private boolean mIsConversation;
-
+    private Path mChildClipPath = null;
+    private final Path mHeaderPath = new Path();
     private boolean mShowGroupCountInExpander;
     private boolean mShowDividersWhenExpanded;
     private boolean mHideDividersDuringExpand;
@@ -119,6 +128,8 @@ public class NotificationChildrenContainer extends ViewGroup
     private float mHeaderVisibleAmount = 1.0f;
     private int mUntruncatedChildCount;
     private boolean mContainingNotificationIsFaded = false;
+    private RoundableState mRoundableState;
+    private boolean mIsNotificationGroupCornerEnabled;
 
     public NotificationChildrenContainer(Context context) {
         this(context, null);
@@ -132,10 +143,14 @@ public class NotificationChildrenContainer extends ViewGroup
         this(context, attrs, defStyleAttr, 0);
     }
 
-    public NotificationChildrenContainer(Context context, AttributeSet attrs, int defStyleAttr,
+    public NotificationChildrenContainer(
+            Context context,
+            AttributeSet attrs,
+            int defStyleAttr,
             int defStyleRes) {
         super(context, attrs, defStyleAttr, defStyleRes);
         mHybridGroupManager = new HybridGroupManager(getContext());
+        mRoundableState = new RoundableState(this, this, 0f);
         initDimens();
         setClipChildren(false);
     }
@@ -167,6 +182,12 @@ public class NotificationChildrenContainer extends ViewGroup
         mHybridGroupManager.initDimens();
     }
 
+    @NonNull
+    @Override
+    public RoundableState getRoundableState() {
+        return mRoundableState;
+    }
+
     @Override
     protected void onLayout(boolean changed, int l, int t, int r, int b) {
         int childCount =
@@ -271,7 +292,7 @@ public class NotificationChildrenContainer extends ViewGroup
     /**
      * Add a child notification to this view.
      *
-     * @param row the row to add
+     * @param row        the row to add
      * @param childIndex the index to add it at, if -1 it will be added at the end
      */
     public void addNotification(ExpandableNotificationRow row, int childIndex) {
@@ -347,8 +368,11 @@ public class NotificationChildrenContainer extends ViewGroup
             mNotificationHeader.findViewById(com.android.internal.R.id.expand_button)
                     .setVisibility(VISIBLE);
             mNotificationHeader.setOnClickListener(mHeaderClickListener);
-            mNotificationHeaderWrapper = NotificationViewWrapper.wrap(getContext(),
-                    mNotificationHeader, mContainingNotification);
+            mNotificationHeaderWrapper =
+                    (NotificationHeaderViewWrapper) NotificationViewWrapper.wrap(
+                            getContext(),
+                            mNotificationHeader,
+                            mContainingNotification);
             addView(mNotificationHeader, 0);
             invalidate();
         } else {
@@ -381,8 +405,11 @@ public class NotificationChildrenContainer extends ViewGroup
                 mNotificationHeaderLowPriority.findViewById(com.android.internal.R.id.expand_button)
                         .setVisibility(VISIBLE);
                 mNotificationHeaderLowPriority.setOnClickListener(mHeaderClickListener);
-                mNotificationHeaderWrapperLowPriority = NotificationViewWrapper.wrap(getContext(),
-                        mNotificationHeaderLowPriority, mContainingNotification);
+                mNotificationHeaderWrapperLowPriority =
+                        (NotificationHeaderViewWrapper) NotificationViewWrapper.wrap(
+                                getContext(),
+                                mNotificationHeaderLowPriority,
+                                mContainingNotification);
                 addView(mNotificationHeaderLowPriority, 0);
                 invalidate();
             } else {
@@ -461,7 +488,9 @@ public class NotificationChildrenContainer extends ViewGroup
         return mAttachedChildren;
     }
 
-    /** To be called any time the rows have been updated */
+    /**
+     * To be called any time the rows have been updated
+     */
     public void updateExpansionStates() {
         if (mChildrenExpanded || mUserLocked) {
             // we don't modify it the group is expanded or if we are expanding it
@@ -475,7 +504,6 @@ public class NotificationChildrenContainer extends ViewGroup
     }
 
     /**
-     *
      * @return the intrinsic size of this children container, i.e the natural fully expanded state
      */
     public int getIntrinsicHeight() {
@@ -485,7 +513,7 @@ public class NotificationChildrenContainer extends ViewGroup
 
     /**
      * @return the intrinsic height with a number of children given
-     *         in @param maxAllowedVisibleChildren
+     * in @param maxAllowedVisibleChildren
      */
     private int getIntrinsicHeight(float maxAllowedVisibleChildren) {
         if (showingAsLowPriority()) {
@@ -539,7 +567,8 @@ public class NotificationChildrenContainer extends ViewGroup
 
     /**
      * Update the state of all its children based on a linear layout algorithm.
-     * @param parentState the state of the parent
+     *
+     * @param parentState  the state of the parent
      * @param ambientState the ambient state containing ambient information
      */
     public void updateState(ExpandableViewState parentState, AmbientState ambientState) {
@@ -655,14 +684,17 @@ public class NotificationChildrenContainer extends ViewGroup
      * When moving into the bottom stack, the bottom visible child in an expanded group adjusts its
      * height, children in the group after this are gone.
      *
-     * @param child the child who's height to adjust.
+     * @param child        the child who's height to adjust.
      * @param parentHeight the height of the parent.
-     * @param childState the state to update.
-     * @param yPosition the yPosition of the view.
+     * @param childState   the state to update.
+     * @param yPosition    the yPosition of the view.
      * @return true if children after this one should be hidden.
      */
-    private boolean updateChildStateForExpandedGroup(ExpandableNotificationRow child,
-            int parentHeight, ExpandableViewState childState, int yPosition) {
+    private boolean updateChildStateForExpandedGroup(
+            ExpandableNotificationRow child,
+            int parentHeight,
+            ExpandableViewState childState,
+            int yPosition) {
         final int top = yPosition + child.getClipTopAmount();
         final int intrinsicHeight = child.getIntrinsicHeight();
         final int bottom = top + intrinsicHeight;
@@ -690,13 +722,15 @@ public class NotificationChildrenContainer extends ViewGroup
         if (mIsLowPriority
                 || (!mContainingNotification.isOnKeyguard() && mContainingNotification.isExpanded())
                 || (mContainingNotification.isHeadsUpState()
-                        && mContainingNotification.canShowHeadsUp())) {
+                && mContainingNotification.canShowHeadsUp())) {
             return NUMBER_OF_CHILDREN_WHEN_SYSTEM_EXPANDED;
         }
         return NUMBER_OF_CHILDREN_WHEN_COLLAPSED;
     }
 
-    /** Applies state to children. */
+    /**
+     * Applies state to children.
+     */
     public void applyState() {
         int childCount = mAttachedChildren.size();
         ViewState tmpState = new ViewState();
@@ -768,17 +802,73 @@ public class NotificationChildrenContainer extends ViewGroup
         }
     }
 
+    @Override
+    protected boolean drawChild(Canvas canvas, View child, long drawingTime) {
+        boolean isCanvasChanged = false;
+
+        Path clipPath = mChildClipPath;
+        if (clipPath != null) {
+            final float translation;
+            if (child instanceof ExpandableNotificationRow) {
+                ExpandableNotificationRow notificationRow = (ExpandableNotificationRow) child;
+                translation = notificationRow.getTranslation();
+            } else {
+                translation = child.getTranslationX();
+            }
+
+            isCanvasChanged = true;
+            canvas.save();
+            if (mIsNotificationGroupCornerEnabled && translation != 0f) {
+                clipPath.offset(translation, 0f);
+                canvas.clipPath(clipPath);
+                clipPath.offset(-translation, 0f);
+            } else {
+                canvas.clipPath(clipPath);
+            }
+        }
+
+        if (child instanceof NotificationHeaderView
+                && mNotificationHeaderWrapper.hasRoundedCorner()) {
+            float[] radii = mNotificationHeaderWrapper.getUpdatedRadii();
+            mHeaderPath.reset();
+            mHeaderPath.addRoundRect(
+                    child.getLeft(),
+                    child.getTop(),
+                    child.getRight(),
+                    child.getBottom(),
+                    radii,
+                    Direction.CW
+            );
+            if (!isCanvasChanged) {
+                isCanvasChanged = true;
+                canvas.save();
+            }
+            canvas.clipPath(mHeaderPath);
+        }
+
+        if (isCanvasChanged) {
+            boolean result = super.drawChild(canvas, child, drawingTime);
+            canvas.restore();
+            return result;
+        } else {
+            // If there have been no changes to the canvas we can proceed as usual
+            return super.drawChild(canvas, child, drawingTime);
+        }
+    }
+
+
     /**
      * This is called when the children expansion has changed and positions the children properly
      * for an appear animation.
-     *
      */
     public void prepareExpansionChanged() {
         // TODO: do something that makes sense, like placing the invisible views correctly
         return;
     }
 
-    /** Animate to a given state. */
+    /**
+     * Animate to a given state.
+     */
     public void startAnimationToState(AnimationProperties properties) {
         int childCount = mAttachedChildren.size();
         ViewState tmpState = new ViewState();
@@ -1102,7 +1192,8 @@ public class NotificationChildrenContainer extends ViewGroup
      * Get the minimum Height for this group.
      *
      * @param maxAllowedVisibleChildren the number of children that should be visible
-     * @param likeHighPriority if the height should be calculated as if it were not low priority
+     * @param likeHighPriority          if the height should be calculated as if it were not low
+     *                                  priority
      */
     private int getMinHeight(int maxAllowedVisibleChildren, boolean likeHighPriority) {
         return getMinHeight(maxAllowedVisibleChildren, likeHighPriority, mCurrentHeaderTranslation);
@@ -1112,10 +1203,13 @@ public class NotificationChildrenContainer extends ViewGroup
      * Get the minimum Height for this group.
      *
      * @param maxAllowedVisibleChildren the number of children that should be visible
-     * @param likeHighPriority if the height should be calculated as if it were not low priority
-     * @param headerTranslation the translation amount of the header
+     * @param likeHighPriority          if the height should be calculated as if it were not low
+     *                                  priority
+     * @param headerTranslation         the translation amount of the header
      */
-    private int getMinHeight(int maxAllowedVisibleChildren, boolean likeHighPriority,
+    private int getMinHeight(
+            int maxAllowedVisibleChildren,
+            boolean likeHighPriority,
             int headerTranslation) {
         if (!likeHighPriority && showingAsLowPriority()) {
             if (mNotificationHeaderLowPriority == null) {
@@ -1274,16 +1368,19 @@ public class NotificationChildrenContainer extends ViewGroup
         return mUserLocked;
     }
 
-    public void setCurrentBottomRoundness(float currentBottomRoundness) {
+    @Override
+    public void applyRoundness() {
+        Roundable.super.applyRoundness();
         boolean last = true;
         for (int i = mAttachedChildren.size() - 1; i >= 0; i--) {
             ExpandableNotificationRow child = mAttachedChildren.get(i);
             if (child.getVisibility() == View.GONE) {
                 continue;
             }
-            float bottomRoundness = last ? currentBottomRoundness : 0.0f;
-            child.setBottomRoundness(bottomRoundness, isShown() /* animate */);
-            child.setTopRoundness(0.0f, false /* animate */);
+            child.requestBottomRoundness(
+                    last ? getBottomRoundness() : 0f,
+                    /* animate = */ isShown(),
+                    SourceType.DefaultValue);
             last = false;
         }
     }
@@ -1293,7 +1390,9 @@ public class NotificationChildrenContainer extends ViewGroup
         mCurrentHeaderTranslation = (int) ((1.0f - headerVisibleAmount) * mTranslationForHeader);
     }
 
-    /** Shows the given feedback icon, or hides the icon if null. */
+    /**
+     * Shows the given feedback icon, or hides the icon if null.
+     */
     public void setFeedbackIcon(@Nullable FeedbackIcon icon) {
         if (mNotificationHeaderWrapper != null) {
             mNotificationHeaderWrapper.setFeedbackIcon(icon);
@@ -1325,4 +1424,26 @@ public class NotificationChildrenContainer extends ViewGroup
             child.setNotificationFaded(faded);
         }
     }
+
+    /**
+     * Allow to define a path the clip the children in #drawChild()
+     *
+     * @param childClipPath path used to clip the children
+     */
+    public void setChildClipPath(@Nullable Path childClipPath) {
+        mChildClipPath = childClipPath;
+        invalidate();
+    }
+
+    public NotificationHeaderViewWrapper getNotificationHeaderWrapper() {
+        return mNotificationHeaderWrapper;
+    }
+
+    /**
+     * Enable the support for rounded corner in notification group
+     * @param enabled true if is supported
+     */
+    public void enableNotificationGroupCorner(boolean enabled) {
+        mIsNotificationGroupCornerEnabled = enabled;
+    }
 }
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/NotificationRoundnessManager.java b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/NotificationRoundnessManager.java
index 2015c87aac2b..6810055ad3bf 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/NotificationRoundnessManager.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/NotificationRoundnessManager.java
@@ -26,6 +26,8 @@ import com.android.systemui.R;
 import com.android.systemui.dagger.SysUISingleton;
 import com.android.systemui.dump.DumpManager;
 import com.android.systemui.statusbar.notification.NotificationSectionsFeatureManager;
+import com.android.systemui.statusbar.notification.Roundable;
+import com.android.systemui.statusbar.notification.SourceType;
 import com.android.systemui.statusbar.notification.collection.NotificationEntry;
 import com.android.systemui.statusbar.notification.logging.NotificationRoundnessLogger;
 import com.android.systemui.statusbar.notification.row.ExpandableNotificationRow;
@@ -59,8 +61,8 @@ public class NotificationRoundnessManager implements Dumpable {
     private boolean mIsClearAllInProgress;
 
     private ExpandableView mSwipedView = null;
-    private ExpandableView mViewBeforeSwipedView = null;
-    private ExpandableView mViewAfterSwipedView = null;
+    private Roundable mViewBeforeSwipedView = null;
+    private Roundable mViewAfterSwipedView = null;
 
     @Inject
     NotificationRoundnessManager(
@@ -101,11 +103,12 @@ public class NotificationRoundnessManager implements Dumpable {
     public boolean isViewAffectedBySwipe(ExpandableView expandableView) {
         return expandableView != null
                 && (expandableView == mSwipedView
-                    || expandableView == mViewBeforeSwipedView
-                    || expandableView == mViewAfterSwipedView);
+                || expandableView == mViewBeforeSwipedView
+                || expandableView == mViewAfterSwipedView);
     }
 
-    boolean updateViewWithoutCallback(ExpandableView view,
+    boolean updateViewWithoutCallback(
+            ExpandableView view,
             boolean animate) {
         if (view == null
                 || view == mViewBeforeSwipedView
@@ -113,11 +116,15 @@ public class NotificationRoundnessManager implements Dumpable {
             return false;
         }
 
-        final float topRoundness = getRoundnessFraction(view, true /* top */);
-        final float bottomRoundness = getRoundnessFraction(view, false /* top */);
+        final boolean isTopChanged = view.requestTopRoundness(
+                getRoundnessDefaultValue(view, true /* top */),
+                animate,
+                SourceType.DefaultValue);
 
-        final boolean topChanged = view.setTopRoundness(topRoundness, animate);
-        final boolean bottomChanged = view.setBottomRoundness(bottomRoundness, animate);
+        final boolean isBottomChanged = view.requestBottomRoundness(
+                getRoundnessDefaultValue(view, /* top = */ false),
+                animate,
+                SourceType.DefaultValue);
 
         final boolean isFirstInSection = isFirstInSection(view);
         final boolean isLastInSection = isLastInSection(view);
@@ -126,9 +133,9 @@ public class NotificationRoundnessManager implements Dumpable {
         view.setLastInSection(isLastInSection);
 
         mNotifLogger.onCornersUpdated(view, isFirstInSection,
-                isLastInSection, topChanged, bottomChanged);
+                isLastInSection, isTopChanged, isBottomChanged);
 
-        return (isFirstInSection || isLastInSection) && (topChanged || bottomChanged);
+        return (isFirstInSection || isLastInSection) && (isTopChanged || isBottomChanged);
     }
 
     private boolean isFirstInSection(ExpandableView view) {
@@ -150,42 +157,46 @@ public class NotificationRoundnessManager implements Dumpable {
     }
 
     void setViewsAffectedBySwipe(
-            ExpandableView viewBefore,
+            Roundable viewBefore,
             ExpandableView viewSwiped,
-            ExpandableView viewAfter) {
+            Roundable viewAfter) {
         final boolean animate = true;
+        final SourceType source = SourceType.OnDismissAnimation;
+
+        // This method requires you to change the roundness of the current View targets and reset
+        // the roundness of the old View targets (if any) to 0f.
+        // To avoid conflicts, it generates a set of old Views and removes the current Views
+        // from this set.
+        HashSet<Roundable> oldViews = new HashSet<>();
+        if (mViewBeforeSwipedView != null) oldViews.add(mViewBeforeSwipedView);
+        if (mSwipedView != null) oldViews.add(mSwipedView);
+        if (mViewAfterSwipedView != null) oldViews.add(mViewAfterSwipedView);
 
-        ExpandableView oldViewBefore = mViewBeforeSwipedView;
         mViewBeforeSwipedView = viewBefore;
-        if (oldViewBefore != null) {
-            final float bottomRoundness = getRoundnessFraction(oldViewBefore, false /* top */);
-            oldViewBefore.setBottomRoundness(bottomRoundness,  animate);
-        }
         if (viewBefore != null) {
-            viewBefore.setBottomRoundness(1f, animate);
+            oldViews.remove(viewBefore);
+            viewBefore.requestTopRoundness(0f, animate, source);
+            viewBefore.requestBottomRoundness(1f, animate, source);
         }
 
-        ExpandableView oldSwipedview = mSwipedView;
         mSwipedView = viewSwiped;
-        if (oldSwipedview != null) {
-            final float bottomRoundness = getRoundnessFraction(oldSwipedview, false /* top */);
-            final float topRoundness = getRoundnessFraction(oldSwipedview, true /* top */);
-            oldSwipedview.setTopRoundness(topRoundness, animate);
-            oldSwipedview.setBottomRoundness(bottomRoundness, animate);
-        }
         if (viewSwiped != null) {
-            viewSwiped.setTopRoundness(1f, animate);
-            viewSwiped.setBottomRoundness(1f, animate);
+            oldViews.remove(viewSwiped);
+            viewSwiped.requestTopRoundness(1f, animate, source);
+            viewSwiped.requestBottomRoundness(1f, animate, source);
         }
 
-        ExpandableView oldViewAfter = mViewAfterSwipedView;
         mViewAfterSwipedView = viewAfter;
-        if (oldViewAfter != null) {
-            final float topRoundness = getRoundnessFraction(oldViewAfter, true /* top */);
-            oldViewAfter.setTopRoundness(topRoundness, animate);
-        }
         if (viewAfter != null) {
-            viewAfter.setTopRoundness(1f, animate);
+            oldViews.remove(viewAfter);
+            viewAfter.requestTopRoundness(1f, animate, source);
+            viewAfter.requestBottomRoundness(0f, animate, source);
+        }
+
+        // After setting the current Views, reset the views that are still present in the set.
+        for (Roundable oldView : oldViews) {
+            oldView.requestTopRoundness(0f, animate, source);
+            oldView.requestBottomRoundness(0f, animate, source);
         }
     }
 
@@ -193,7 +204,7 @@ public class NotificationRoundnessManager implements Dumpable {
         mIsClearAllInProgress = isClearingAll;
     }
 
-    private float getRoundnessFraction(ExpandableView view, boolean top) {
+    private float getRoundnessDefaultValue(Roundable view, boolean top) {
         if (view == null) {
             return 0f;
         }
@@ -207,28 +218,35 @@ public class NotificationRoundnessManager implements Dumpable {
                 && mIsClearAllInProgress) {
             return 1.0f;
         }
-        if ((view.isPinned()
-                || (view.isHeadsUpAnimatingAway()) && !mExpanded)) {
-            return 1.0f;
-        }
-        if (isFirstInSection(view) && top) {
-            return 1.0f;
-        }
-        if (isLastInSection(view) && !top) {
-            return 1.0f;
-        }
+        if (view instanceof ExpandableView) {
+            ExpandableView expandableView = (ExpandableView) view;
+            if ((expandableView.isPinned()
+                    || (expandableView.isHeadsUpAnimatingAway()) && !mExpanded)) {
+                return 1.0f;
+            }
+            if (isFirstInSection(expandableView) && top) {
+                return 1.0f;
+            }
+            if (isLastInSection(expandableView) && !top) {
+                return 1.0f;
+            }
 
-        if (view == mTrackedHeadsUp) {
-            // If we're pushing up on a headsup the appear fraction is < 0 and it needs to still be
-            // rounded.
-            return MathUtils.saturate(1.0f - mAppearFraction);
-        }
-        if (view.showingPulsing() && mRoundForPulsingViews) {
-            return 1.0f;
+            if (view == mTrackedHeadsUp) {
+                // If we're pushing up on a headsup the appear fraction is < 0 and it needs to
+                // still be rounded.
+                return MathUtils.saturate(1.0f - mAppearFraction);
+            }
+            if (expandableView.showingPulsing() && mRoundForPulsingViews) {
+                return 1.0f;
+            }
+            if (expandableView.isChildInGroup()) {
+                return 0f;
+            }
+            final Resources resources = expandableView.getResources();
+            return resources.getDimension(R.dimen.notification_corner_radius_small)
+                    / resources.getDimension(R.dimen.notification_corner_radius);
         }
-        final Resources resources = view.getResources();
-        return resources.getDimension(R.dimen.notification_corner_radius_small)
-                / resources.getDimension(R.dimen.notification_corner_radius);
+        return 0f;
     }
 
     public void setExpanded(float expandedHeight, float appearFraction) {
@@ -258,8 +276,10 @@ public class NotificationRoundnessManager implements Dumpable {
         mNotifLogger.onSectionCornersUpdated(sections, anyChanged);
     }
 
-    private boolean handleRemovedOldViews(NotificationSection[] sections,
-            ExpandableView[] oldViews, boolean first) {
+    private boolean handleRemovedOldViews(
+            NotificationSection[] sections,
+            ExpandableView[] oldViews,
+            boolean first) {
         boolean anyChanged = false;
         for (ExpandableView oldView : oldViews) {
             if (oldView != null) {
@@ -289,8 +309,10 @@ public class NotificationRoundnessManager implements Dumpable {
         return anyChanged;
     }
 
-    private boolean handleAddedNewViews(NotificationSection[] sections,
-            ExpandableView[] oldViews, boolean first) {
+    private boolean handleAddedNewViews(
+            NotificationSection[] sections,
+            ExpandableView[] oldViews,
+            boolean first) {
         boolean anyChanged = false;
         for (NotificationSection section : sections) {
             ExpandableView newView =
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/NotificationStackScrollLayout.java b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/NotificationStackScrollLayout.java
index 2272411b4314..df705c5afeef 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/NotificationStackScrollLayout.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/NotificationStackScrollLayout.java
@@ -1188,7 +1188,7 @@ public class NotificationStackScrollLayout extends ViewGroup implements Dumpable
             return;
         }
         for (int i = 0; i < getChildCount(); i++) {
-            ExpandableView child = (ExpandableView) getChildAt(i);
+            ExpandableView child = getChildAtIndex(i);
             if (mChildrenToAddAnimated.contains(child)) {
                 final int startingPosition = getPositionInLinearLayout(child);
                 final int childHeight = getIntrinsicHeight(child) + mPaddingBetweenElements;
@@ -1658,7 +1658,7 @@ public class NotificationStackScrollLayout extends ViewGroup implements Dumpable
         // find the view under the pointer, accounting for GONE views
         final int count = getChildCount();
         for (int childIdx = 0; childIdx < count; childIdx++) {
-            ExpandableView slidingChild = (ExpandableView) getChildAt(childIdx);
+            ExpandableView slidingChild = getChildAtIndex(childIdx);
             if (slidingChild.getVisibility() != VISIBLE
                     || (ignoreDecors && slidingChild instanceof StackScrollerDecorView)) {
                 continue;
@@ -1691,6 +1691,10 @@ public class NotificationStackScrollLayout extends ViewGroup implements Dumpable
         return null;
     }
 
+    private ExpandableView getChildAtIndex(int index) {
+        return (ExpandableView) getChildAt(index);
+    }
+
     public ExpandableView getChildAtRawPosition(float touchX, float touchY) {
         getLocationOnScreen(mTempInt2);
         return getChildAtPosition(touchX - mTempInt2[0], touchY - mTempInt2[1]);
@@ -2276,7 +2280,7 @@ public class NotificationStackScrollLayout extends ViewGroup implements Dumpable
         int childCount = getChildCount();
         int count = 0;
         for (int i = 0; i < childCount; i++) {
-            ExpandableView child = (ExpandableView) getChildAt(i);
+            ExpandableView child = getChildAtIndex(i);
             if (child.getVisibility() != View.GONE && !child.willBeGone() && child != mShelf) {
                 count++;
             }
@@ -2496,7 +2500,7 @@ public class NotificationStackScrollLayout extends ViewGroup implements Dumpable
     private ExpandableView getLastChildWithBackground() {
         int childCount = getChildCount();
         for (int i = childCount - 1; i >= 0; i--) {
-            ExpandableView child = (ExpandableView) getChildAt(i);
+            ExpandableView child = getChildAtIndex(i);
             if (child.getVisibility() != View.GONE && !(child instanceof StackScrollerDecorView)
                     && child != mShelf) {
                 return child;
@@ -2509,7 +2513,7 @@ public class NotificationStackScrollLayout extends ViewGroup implements Dumpable
     private ExpandableView getFirstChildWithBackground() {
         int childCount = getChildCount();
         for (int i = 0; i < childCount; i++) {
-            ExpandableView child = (ExpandableView) getChildAt(i);
+            ExpandableView child = getChildAtIndex(i);
             if (child.getVisibility() != View.GONE && !(child instanceof StackScrollerDecorView)
                     && child != mShelf) {
                 return child;
@@ -2523,7 +2527,7 @@ public class NotificationStackScrollLayout extends ViewGroup implements Dumpable
         ArrayList<ExpandableView> children = new ArrayList<>();
         int childCount = getChildCount();
         for (int i = 0; i < childCount; i++) {
-            ExpandableView child = (ExpandableView) getChildAt(i);
+            ExpandableView child = getChildAtIndex(i);
             if (child.getVisibility() != View.GONE
                     && !(child instanceof StackScrollerDecorView)
                     && child != mShelf) {
@@ -2882,7 +2886,7 @@ public class NotificationStackScrollLayout extends ViewGroup implements Dumpable
         }
         int position = 0;
         for (int i = 0; i < getChildCount(); i++) {
-            ExpandableView child = (ExpandableView) getChildAt(i);
+            ExpandableView child = getChildAtIndex(i);
             boolean notGone = child.getVisibility() != View.GONE;
             if (notGone && !child.hasNoContentHeight()) {
                 if (position != 0) {
@@ -2936,7 +2940,7 @@ public class NotificationStackScrollLayout extends ViewGroup implements Dumpable
         }
         mAmbientState.setLastVisibleBackgroundChild(lastChild);
         // TODO: Refactor SectionManager and put the RoundnessManager there.
-        mController.getNoticationRoundessManager().updateRoundedChildren(mSections);
+        mController.getNotificationRoundnessManager().updateRoundedChildren(mSections);
         mAnimateBottomOnLayout = false;
         invalidate();
     }
@@ -3968,7 +3972,7 @@ public class NotificationStackScrollLayout extends ViewGroup implements Dumpable
     @ShadeViewRefactor(RefactorComponent.STATE_RESOLVER)
     private void clearUserLockedViews() {
         for (int i = 0; i < getChildCount(); i++) {
-            ExpandableView child = (ExpandableView) getChildAt(i);
+            ExpandableView child = getChildAtIndex(i);
             if (child instanceof ExpandableNotificationRow) {
                 ExpandableNotificationRow row = (ExpandableNotificationRow) child;
                 row.setUserLocked(false);
@@ -3981,7 +3985,7 @@ public class NotificationStackScrollLayout extends ViewGroup implements Dumpable
         // lets make sure nothing is transient anymore
         clearTemporaryViewsInGroup(this);
         for (int i = 0; i < getChildCount(); i++) {
-            ExpandableView child = (ExpandableView) getChildAt(i);
+            ExpandableView child = getChildAtIndex(i);
             if (child instanceof ExpandableNotificationRow) {
                 ExpandableNotificationRow row = (ExpandableNotificationRow) child;
                 clearTemporaryViewsInGroup(row.getChildrenContainer());
@@ -4230,7 +4234,7 @@ public class NotificationStackScrollLayout extends ViewGroup implements Dumpable
         if (hideSensitive != mAmbientState.isHideSensitive()) {
             int childCount = getChildCount();
             for (int i = 0; i < childCount; i++) {
-                ExpandableView v = (ExpandableView) getChildAt(i);
+                ExpandableView v = getChildAtIndex(i);
                 v.setHideSensitiveForIntrinsicHeight(hideSensitive);
             }
             mAmbientState.setHideSensitive(hideSensitive);
@@ -4265,7 +4269,7 @@ public class NotificationStackScrollLayout extends ViewGroup implements Dumpable
     private void applyCurrentState() {
         int numChildren = getChildCount();
         for (int i = 0; i < numChildren; i++) {
-            ExpandableView child = (ExpandableView) getChildAt(i);
+            ExpandableView child = getChildAtIndex(i);
             child.applyViewState();
         }
 
@@ -4285,7 +4289,7 @@ public class NotificationStackScrollLayout extends ViewGroup implements Dumpable
 
         // Lefts first sort by Z difference
         for (int i = 0; i < getChildCount(); i++) {
-            ExpandableView child = (ExpandableView) getChildAt(i);
+            ExpandableView child = getChildAtIndex(i);
             if (child.getVisibility() != GONE) {
                 mTmpSortedChildren.add(child);
             }
@@ -4512,7 +4516,7 @@ public class NotificationStackScrollLayout extends ViewGroup implements Dumpable
     public void setClearAllInProgress(boolean clearAllInProgress) {
         mClearAllInProgress = clearAllInProgress;
         mAmbientState.setClearAllInProgress(clearAllInProgress);
-        mController.getNoticationRoundessManager().setClearAllInProgress(clearAllInProgress);
+        mController.getNotificationRoundnessManager().setClearAllInProgress(clearAllInProgress);
     }
 
     boolean getClearAllInProgress() {
@@ -4555,7 +4559,7 @@ public class NotificationStackScrollLayout extends ViewGroup implements Dumpable
         final int count = getChildCount();
         float max = 0;
         for (int childIdx = 0; childIdx < count; childIdx++) {
-            ExpandableView child = (ExpandableView) getChildAt(childIdx);
+            ExpandableView child = getChildAtIndex(childIdx);
             if (child.getVisibility() == GONE) {
                 continue;
             }
@@ -4586,7 +4590,7 @@ public class NotificationStackScrollLayout extends ViewGroup implements Dumpable
     public boolean isBelowLastNotification(float touchX, float touchY) {
         int childCount = getChildCount();
         for (int i = childCount - 1; i >= 0; i--) {
-            ExpandableView child = (ExpandableView) getChildAt(i);
+            ExpandableView child = getChildAtIndex(i);
             if (child.getVisibility() != View.GONE) {
                 float childTop = child.getY();
                 if (childTop > touchY) {
@@ -5052,7 +5056,7 @@ public class NotificationStackScrollLayout extends ViewGroup implements Dumpable
             pw.println();
 
             for (int i = 0; i < childCount; i++) {
-                ExpandableView child = (ExpandableView) getChildAt(i);
+                ExpandableView child = getChildAtIndex(i);
                 child.dump(pw, args);
                 pw.println();
             }
@@ -5341,7 +5345,7 @@ public class NotificationStackScrollLayout extends ViewGroup implements Dumpable
         float wakeUplocation = -1f;
         int childCount = getChildCount();
         for (int i = 0; i < childCount; i++) {
-            ExpandableView view = (ExpandableView) getChildAt(i);
+            ExpandableView view = getChildAtIndex(i);
             if (view.getVisibility() == View.GONE) {
                 continue;
             }
@@ -5380,7 +5384,7 @@ public class NotificationStackScrollLayout extends ViewGroup implements Dumpable
     public void setController(
             NotificationStackScrollLayoutController notificationStackScrollLayoutController) {
         mController = notificationStackScrollLayoutController;
-        mController.getNoticationRoundessManager().setAnimatedChildren(mChildrenToAddAnimated);
+        mController.getNotificationRoundnessManager().setAnimatedChildren(mChildrenToAddAnimated);
     }
 
     void addSwipedOutView(View v) {
@@ -5391,31 +5395,22 @@ public class NotificationStackScrollLayout extends ViewGroup implements Dumpable
         if (!(viewSwiped instanceof ExpandableNotificationRow)) {
             return;
         }
-        final int indexOfSwipedView = indexOfChild(viewSwiped);
-        if (indexOfSwipedView < 0) {
-            return;
-        }
         mSectionsManager.updateFirstAndLastViewsForAllSections(
-                mSections, getChildrenWithBackground());
-        View viewBefore = null;
-        if (indexOfSwipedView > 0) {
-            viewBefore = getChildAt(indexOfSwipedView - 1);
-            if (mSectionsManager.beginsSection(viewSwiped, viewBefore)) {
-                viewBefore = null;
-            }
-        }
-        View viewAfter = null;
-        if (indexOfSwipedView < getChildCount()) {
-            viewAfter = getChildAt(indexOfSwipedView + 1);
-            if (mSectionsManager.beginsSection(viewAfter, viewSwiped)) {
-                viewAfter = null;
-            }
-        }
-        mController.getNoticationRoundessManager()
+                mSections,
+                getChildrenWithBackground()
+        );
+
+        RoundableTargets targets = mController.getNotificationTargetsHelper().findRoundableTargets(
+                (ExpandableNotificationRow) viewSwiped,
+                this,
+                mSectionsManager
+        );
+
+        mController.getNotificationRoundnessManager()
                 .setViewsAffectedBySwipe(
-                        (ExpandableView) viewBefore,
-                        (ExpandableView) viewSwiped,
-                        (ExpandableView) viewAfter);
+                        targets.getBefore(),
+                        targets.getSwiped(),
+                        targets.getAfter());
 
         updateFirstAndLastBackgroundViews();
         requestDisallowInterceptTouchEvent(true);
@@ -5426,7 +5421,7 @@ public class NotificationStackScrollLayout extends ViewGroup implements Dumpable
 
     void onSwipeEnd() {
         updateFirstAndLastBackgroundViews();
-        mController.getNoticationRoundessManager()
+        mController.getNotificationRoundnessManager()
                 .setViewsAffectedBySwipe(null, null, null);
         // Round bottom corners for notification right before shelf.
         mShelf.updateAppearance();
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/NotificationStackScrollLayoutController.java b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/NotificationStackScrollLayoutController.java
index bde98ff73706..e13378269ba6 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/NotificationStackScrollLayoutController.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/NotificationStackScrollLayoutController.java
@@ -180,6 +180,7 @@ public class NotificationStackScrollLayoutController {
     private int mBarState;
     private HeadsUpAppearanceController mHeadsUpAppearanceController;
     private final FeatureFlags mFeatureFlags;
+    private final NotificationTargetsHelper mNotificationTargetsHelper;
 
     private View mLongPressedView;
 
@@ -642,7 +643,8 @@ public class NotificationStackScrollLayoutController {
             StackStateLogger stackLogger,
             NotificationStackScrollLogger logger,
             NotificationStackSizeCalculator notificationStackSizeCalculator,
-            FeatureFlags featureFlags) {
+            FeatureFlags featureFlags,
+            NotificationTargetsHelper notificationTargetsHelper) {
         mStackStateLogger = stackLogger;
         mLogger = logger;
         mAllowLongPress = allowLongPress;
@@ -679,6 +681,7 @@ public class NotificationStackScrollLayoutController {
         mRemoteInputManager = remoteInputManager;
         mShadeController = shadeController;
         mFeatureFlags = featureFlags;
+        mNotificationTargetsHelper = notificationTargetsHelper;
         updateResources();
     }
 
@@ -1380,7 +1383,7 @@ public class NotificationStackScrollLayoutController {
         return mView.calculateGapHeight(previousView, child, count);
     }
 
-    NotificationRoundnessManager getNoticationRoundessManager() {
+    NotificationRoundnessManager getNotificationRoundnessManager() {
         return mNotificationRoundnessManager;
     }
 
@@ -1537,6 +1540,10 @@ public class NotificationStackScrollLayoutController {
         mNotificationActivityStarter = activityStarter;
     }
 
+    public NotificationTargetsHelper getNotificationTargetsHelper() {
+        return mNotificationTargetsHelper;
+    }
+
     /**
      * Enum for UiEvent logged from this class
      */
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/NotificationTargetsHelper.kt b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/NotificationTargetsHelper.kt
new file mode 100644
index 000000000000..991a14bb9c2a
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/NotificationTargetsHelper.kt
@@ -0,0 +1,100 @@
+package com.android.systemui.statusbar.notification.stack
+
+import androidx.core.view.children
+import androidx.core.view.isVisible
+import com.android.systemui.dagger.SysUISingleton
+import com.android.systemui.flags.FeatureFlags
+import com.android.systemui.flags.Flags
+import com.android.systemui.statusbar.notification.Roundable
+import com.android.systemui.statusbar.notification.row.ExpandableNotificationRow
+import com.android.systemui.statusbar.notification.row.ExpandableView
+import javax.inject.Inject
+
+/**
+ * Utility class that helps us find the targets of an animation, often used to find the notification
+ * ([Roundable]) above and below the current one (see [findRoundableTargets]).
+ */
+@SysUISingleton
+class NotificationTargetsHelper
+@Inject
+constructor(
+    featureFlags: FeatureFlags,
+) {
+    private val isNotificationGroupCornerEnabled =
+        featureFlags.isEnabled(Flags.NOTIFICATION_GROUP_CORNER)
+
+    /**
+     * This method looks for views that can be rounded (and implement [Roundable]) during a
+     * notification swipe.
+     * @return The [Roundable] targets above/below the [viewSwiped] (if available). The
+     * [RoundableTargets.before] and [RoundableTargets.after] parameters can be `null` if there is
+     * no above/below notification or the notification is not part of the same section.
+     */
+    fun findRoundableTargets(
+        viewSwiped: ExpandableNotificationRow,
+        stackScrollLayout: NotificationStackScrollLayout,
+        sectionsManager: NotificationSectionsManager,
+    ): RoundableTargets {
+        val viewBefore: Roundable?
+        val viewAfter: Roundable?
+
+        val notificationParent = viewSwiped.notificationParent
+        val childrenContainer = notificationParent?.childrenContainer
+        val visibleStackChildren =
+            stackScrollLayout.children
+                .filterIsInstance<ExpandableView>()
+                .filter { it.isVisible }
+                .toList()
+        if (notificationParent != null && childrenContainer != null) {
+            // We are inside a notification group
+
+            if (!isNotificationGroupCornerEnabled) {
+                return RoundableTargets(null, null, null)
+            }
+
+            val visibleGroupChildren = childrenContainer.attachedChildren.filter { it.isVisible }
+            val indexOfParentSwipedView = visibleGroupChildren.indexOf(viewSwiped)
+
+            viewBefore =
+                visibleGroupChildren.getOrNull(indexOfParentSwipedView - 1)
+                    ?: childrenContainer.notificationHeaderWrapper
+
+            viewAfter =
+                visibleGroupChildren.getOrNull(indexOfParentSwipedView + 1)
+                    ?: visibleStackChildren.indexOf(notificationParent).let {
+                        visibleStackChildren.getOrNull(it + 1)
+                    }
+        } else {
+            // Assumption: we are inside the NotificationStackScrollLayout
+
+            val indexOfSwipedView = visibleStackChildren.indexOf(viewSwiped)
+
+            viewBefore =
+                visibleStackChildren.getOrNull(indexOfSwipedView - 1)?.takeIf {
+                    !sectionsManager.beginsSection(viewSwiped, it)
+                }
+
+            viewAfter =
+                visibleStackChildren.getOrNull(indexOfSwipedView + 1)?.takeIf {
+                    !sectionsManager.beginsSection(it, viewSwiped)
+                }
+        }
+
+        return RoundableTargets(
+            before = viewBefore,
+            swiped = viewSwiped,
+            after = viewAfter,
+        )
+    }
+}
+
+/**
+ * This object contains targets above/below the [swiped] (if available). The [before] and [after]
+ * parameters can be `null` if there is no above/below notification or the notification is not part
+ * of the same section.
+ */
+data class RoundableTargets(
+    val before: Roundable?,
+    val swiped: ExpandableNotificationRow?,
+    val after: Roundable?,
+)
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/StackScrollAlgorithm.java b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/StackScrollAlgorithm.java
index 0502159f46cd..eea1d9118fb7 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/StackScrollAlgorithm.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/StackScrollAlgorithm.java
@@ -31,6 +31,7 @@ import com.android.systemui.R;
 import com.android.systemui.animation.ShadeInterpolation;
 import com.android.systemui.statusbar.EmptyShadeView;
 import com.android.systemui.statusbar.NotificationShelf;
+import com.android.systemui.statusbar.notification.SourceType;
 import com.android.systemui.statusbar.notification.row.ActivatableNotificationView;
 import com.android.systemui.statusbar.notification.row.ExpandableNotificationRow;
 import com.android.systemui.statusbar.notification.row.ExpandableView;
@@ -804,7 +805,7 @@ public class StackScrollAlgorithm {
                 row.isLastInSection() ? 1f : (mSmallCornerRadius / mLargeCornerRadius);
         final float roundness = computeCornerRoundnessForPinnedHun(mHostView.getHeight(),
                 ambientState.getStackY(), getMaxAllowedChildHeight(row), originalCornerRadius);
-        row.setBottomRoundness(roundness, /* animate= */ false);
+        row.requestBottomRoundness(roundness, /* animate = */ false, SourceType.OnScroll);
     }
 
     @VisibleForTesting
diff --git a/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/stack/NotificationRoundnessManagerTest.java b/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/stack/NotificationRoundnessManagerTest.java
index a95a49c31adf..8c8b64424814 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/stack/NotificationRoundnessManagerTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/stack/NotificationRoundnessManagerTest.java
@@ -147,8 +147,8 @@ public class NotificationRoundnessManagerTest extends SysuiTestCase {
                 createSection(mFirst, mSecond),
                 createSection(null, null)
         });
-        Assert.assertEquals(1.0f, mSecond.getCurrentBottomRoundness(), 0.0f);
-        Assert.assertEquals(mSmallRadiusRatio, mSecond.getCurrentTopRoundness(), 0.0f);
+        Assert.assertEquals(1.0f, mSecond.getBottomRoundness(), 0.0f);
+        Assert.assertEquals(mSmallRadiusRatio, mSecond.getTopRoundness(), 0.0f);
     }
 
     @Test
@@ -170,13 +170,13 @@ public class NotificationRoundnessManagerTest extends SysuiTestCase {
         when(testHelper.getStatusBarStateController().isDozing()).thenReturn(true);
         row.setHeadsUp(true);
         mRoundnessManager.updateView(entry.getRow(), false);
-        Assert.assertEquals(1f, row.getCurrentBottomRoundness(), 0.0f);
-        Assert.assertEquals(1f, row.getCurrentTopRoundness(), 0.0f);
+        Assert.assertEquals(1f, row.getBottomRoundness(), 0.0f);
+        Assert.assertEquals(1f, row.getTopRoundness(), 0.0f);
 
         row.setHeadsUp(false);
         mRoundnessManager.updateView(entry.getRow(), false);
-        Assert.assertEquals(mSmallRadiusRatio, row.getCurrentBottomRoundness(), 0.0f);
-        Assert.assertEquals(mSmallRadiusRatio, row.getCurrentTopRoundness(), 0.0f);
+        Assert.assertEquals(mSmallRadiusRatio, row.getBottomRoundness(), 0.0f);
+        Assert.assertEquals(mSmallRadiusRatio, row.getTopRoundness(), 0.0f);
     }
 
     @Test
@@ -185,8 +185,8 @@ public class NotificationRoundnessManagerTest extends SysuiTestCase {
                 createSection(mFirst, mFirst),
                 createSection(null, mSecond)
         });
-        Assert.assertEquals(1.0f, mSecond.getCurrentBottomRoundness(), 0.0f);
-        Assert.assertEquals(mSmallRadiusRatio, mSecond.getCurrentTopRoundness(), 0.0f);
+        Assert.assertEquals(1.0f, mSecond.getBottomRoundness(), 0.0f);
+        Assert.assertEquals(mSmallRadiusRatio, mSecond.getTopRoundness(), 0.0f);
     }
 
     @Test
@@ -195,8 +195,8 @@ public class NotificationRoundnessManagerTest extends SysuiTestCase {
                 createSection(mFirst, mFirst),
                 createSection(mSecond, null)
         });
-        Assert.assertEquals(mSmallRadiusRatio, mSecond.getCurrentBottomRoundness(), 0.0f);
-        Assert.assertEquals(1.0f, mSecond.getCurrentTopRoundness(), 0.0f);
+        Assert.assertEquals(mSmallRadiusRatio, mSecond.getBottomRoundness(), 0.0f);
+        Assert.assertEquals(1.0f, mSecond.getTopRoundness(), 0.0f);
     }
 
     @Test
@@ -205,8 +205,8 @@ public class NotificationRoundnessManagerTest extends SysuiTestCase {
                 createSection(mFirst, null),
                 createSection(null, null)
         });
-        Assert.assertEquals(mSmallRadiusRatio, mFirst.getCurrentBottomRoundness(), 0.0f);
-        Assert.assertEquals(1.0f, mFirst.getCurrentTopRoundness(), 0.0f);
+        Assert.assertEquals(mSmallRadiusRatio, mFirst.getBottomRoundness(), 0.0f);
+        Assert.assertEquals(1.0f, mFirst.getTopRoundness(), 0.0f);
     }
 
     @Test
@@ -215,8 +215,8 @@ public class NotificationRoundnessManagerTest extends SysuiTestCase {
                 createSection(mSecond, mSecond),
                 createSection(null, null)
         });
-        Assert.assertEquals(mSmallRadiusRatio, mFirst.getCurrentBottomRoundness(), 0.0f);
-        Assert.assertEquals(mSmallRadiusRatio, mFirst.getCurrentTopRoundness(), 0.0f);
+        Assert.assertEquals(mSmallRadiusRatio, mFirst.getBottomRoundness(), 0.0f);
+        Assert.assertEquals(mSmallRadiusRatio, mFirst.getTopRoundness(), 0.0f);
     }
 
     @Test
@@ -226,8 +226,8 @@ public class NotificationRoundnessManagerTest extends SysuiTestCase {
                 createSection(mSecond, mSecond),
                 createSection(null, null)
         });
-        Assert.assertEquals(1.0f, mFirst.getCurrentBottomRoundness(), 0.0f);
-        Assert.assertEquals(1.0f, mFirst.getCurrentTopRoundness(), 0.0f);
+        Assert.assertEquals(1.0f, mFirst.getBottomRoundness(), 0.0f);
+        Assert.assertEquals(1.0f, mFirst.getTopRoundness(), 0.0f);
     }
 
     @Test
@@ -238,8 +238,8 @@ public class NotificationRoundnessManagerTest extends SysuiTestCase {
                 createSection(mSecond, mSecond),
                 createSection(null, null)
         });
-        Assert.assertEquals(1.0f, mFirst.getCurrentBottomRoundness(), 0.0f);
-        Assert.assertEquals(1.0f, mFirst.getCurrentTopRoundness(), 0.0f);
+        Assert.assertEquals(1.0f, mFirst.getBottomRoundness(), 0.0f);
+        Assert.assertEquals(1.0f, mFirst.getTopRoundness(), 0.0f);
     }
 
     @Test
@@ -250,8 +250,8 @@ public class NotificationRoundnessManagerTest extends SysuiTestCase {
                 createSection(mSecond, mSecond),
                 createSection(null, null)
         });
-        Assert.assertEquals(1.0f, mFirst.getCurrentBottomRoundness(), 0.0f);
-        Assert.assertEquals(1.0f, mFirst.getCurrentTopRoundness(), 0.0f);
+        Assert.assertEquals(1.0f, mFirst.getBottomRoundness(), 0.0f);
+        Assert.assertEquals(1.0f, mFirst.getTopRoundness(), 0.0f);
     }
 
     @Test
@@ -262,8 +262,8 @@ public class NotificationRoundnessManagerTest extends SysuiTestCase {
                 createSection(mSecond, mSecond),
                 createSection(null, null)
         });
-        Assert.assertEquals(mSmallRadiusRatio, mFirst.getCurrentBottomRoundness(), 0.0f);
-        Assert.assertEquals(mSmallRadiusRatio, mFirst.getCurrentTopRoundness(), 0.0f);
+        Assert.assertEquals(mSmallRadiusRatio, mFirst.getBottomRoundness(), 0.0f);
+        Assert.assertEquals(mSmallRadiusRatio, mFirst.getTopRoundness(), 0.0f);
     }
 
     @Test
@@ -274,8 +274,8 @@ public class NotificationRoundnessManagerTest extends SysuiTestCase {
                 createSection(mSecond, mSecond),
                 createSection(null, null)
         });
-        Assert.assertEquals(1.0f, mFirst.getCurrentBottomRoundness(), 0.0f);
-        Assert.assertEquals(1.0f, mFirst.getCurrentTopRoundness(), 0.0f);
+        Assert.assertEquals(1.0f, mFirst.getBottomRoundness(), 0.0f);
+        Assert.assertEquals(1.0f, mFirst.getTopRoundness(), 0.0f);
     }
 
     @Test
@@ -286,8 +286,8 @@ public class NotificationRoundnessManagerTest extends SysuiTestCase {
                 createSection(mSecond, mSecond),
                 createSection(null, null)
         });
-        Assert.assertEquals(0.5f, mFirst.getCurrentBottomRoundness(), 0.0f);
-        Assert.assertEquals(0.5f, mFirst.getCurrentTopRoundness(), 0.0f);
+        Assert.assertEquals(0.5f, mFirst.getBottomRoundness(), 0.0f);
+        Assert.assertEquals(0.5f, mFirst.getTopRoundness(), 0.0f);
     }
 
     @Test
@@ -298,8 +298,8 @@ public class NotificationRoundnessManagerTest extends SysuiTestCase {
                 createSection(null, null)
         });
         mFirst.setHeadsUpAnimatingAway(true);
-        Assert.assertEquals(1.0f, mFirst.getCurrentBottomRoundness(), 0.0f);
-        Assert.assertEquals(1.0f, mFirst.getCurrentTopRoundness(), 0.0f);
+        Assert.assertEquals(1.0f, mFirst.getBottomRoundness(), 0.0f);
+        Assert.assertEquals(1.0f, mFirst.getTopRoundness(), 0.0f);
     }
 
 
@@ -312,8 +312,8 @@ public class NotificationRoundnessManagerTest extends SysuiTestCase {
         });
         mFirst.setHeadsUpAnimatingAway(true);
         mFirst.setHeadsUpAnimatingAway(false);
-        Assert.assertEquals(mSmallRadiusRatio, mFirst.getCurrentBottomRoundness(), 0.0f);
-        Assert.assertEquals(mSmallRadiusRatio, mFirst.getCurrentTopRoundness(), 0.0f);
+        Assert.assertEquals(mSmallRadiusRatio, mFirst.getBottomRoundness(), 0.0f);
+        Assert.assertEquals(mSmallRadiusRatio, mFirst.getTopRoundness(), 0.0f);
     }
 
     @Test
diff --git a/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/stack/NotificationStackScrollLayoutControllerTest.java b/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/stack/NotificationStackScrollLayoutControllerTest.java
index a3c95dcaeb3c..90061b078afe 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/stack/NotificationStackScrollLayoutControllerTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/stack/NotificationStackScrollLayoutControllerTest.java
@@ -129,6 +129,7 @@ public class NotificationStackScrollLayoutControllerTest extends SysuiTestCase {
     @Mock private NotificationStackSizeCalculator mNotificationStackSizeCalculator;
     @Mock private ShadeTransitionController mShadeTransitionController;
     @Mock private FeatureFlags mFeatureFlags;
+    @Mock private NotificationTargetsHelper mNotificationTargetsHelper;
 
     @Captor
     private ArgumentCaptor<StatusBarStateController.StateListener> mStateListenerArgumentCaptor;
@@ -177,7 +178,8 @@ public class NotificationStackScrollLayoutControllerTest extends SysuiTestCase {
                 mStackLogger,
                 mLogger,
                 mNotificationStackSizeCalculator,
-                mFeatureFlags
+                mFeatureFlags,
+                mNotificationTargetsHelper
         );
 
         when(mNotificationStackScrollLayout.isAttachedToWindow()).thenReturn(true);
diff --git a/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/stack/NotificationStackScrollLayoutTest.java b/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/stack/NotificationStackScrollLayoutTest.java
index 35c8b61b6383..91aecd8cf753 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/stack/NotificationStackScrollLayoutTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/stack/NotificationStackScrollLayoutTest.java
@@ -163,7 +163,7 @@ public class NotificationStackScrollLayoutTest extends SysuiTestCase {
         mStackScroller.setCentralSurfaces(mCentralSurfaces);
         mStackScroller.setEmptyShadeView(mEmptyShadeView);
         when(mStackScrollLayoutController.isHistoryEnabled()).thenReturn(true);
-        when(mStackScrollLayoutController.getNoticationRoundessManager())
+        when(mStackScrollLayoutController.getNotificationRoundnessManager())
                 .thenReturn(mNotificationRoundnessManager);
         mStackScroller.setController(mStackScrollLayoutController);
 
diff --git a/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/stack/NotificationTargetsHelperTest.kt b/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/stack/NotificationTargetsHelperTest.kt
new file mode 100644
index 000000000000..a2e92305bf27
--- /dev/null
+++ b/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/stack/NotificationTargetsHelperTest.kt
@@ -0,0 +1,107 @@
+package com.android.systemui.statusbar.notification.stack
+
+import android.testing.AndroidTestingRunner
+import android.testing.TestableLooper
+import android.testing.TestableLooper.RunWithLooper
+import androidx.test.filters.SmallTest
+import com.android.systemui.SysuiTestCase
+import com.android.systemui.flags.FakeFeatureFlags
+import com.android.systemui.flags.Flags
+import com.android.systemui.statusbar.notification.row.NotificationTestHelper
+import com.android.systemui.util.mockito.mock
+import junit.framework.Assert.assertEquals
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+
+/** Tests for {@link NotificationTargetsHelper}. */
+@SmallTest
+@RunWith(AndroidTestingRunner::class)
+@RunWithLooper
+class NotificationTargetsHelperTest : SysuiTestCase() {
+    lateinit var notificationTestHelper: NotificationTestHelper
+    private val sectionsManager: NotificationSectionsManager = mock()
+    private val stackScrollLayout: NotificationStackScrollLayout = mock()
+
+    @Before
+    fun setUp() {
+        allowTestableLooperAsMainThread()
+        notificationTestHelper =
+            NotificationTestHelper(mContext, mDependency, TestableLooper.get(this))
+    }
+
+    private fun notificationTargetsHelper(
+        notificationGroupCorner: Boolean = true,
+    ) =
+        NotificationTargetsHelper(
+            FakeFeatureFlags().apply {
+                set(Flags.NOTIFICATION_GROUP_CORNER, notificationGroupCorner)
+            }
+        )
+
+    @Test
+    fun targetsForFirstNotificationInGroup() {
+        val children = notificationTestHelper.createGroup(3).childrenContainer
+        val swiped = children.attachedChildren[0]
+
+        val actual =
+            notificationTargetsHelper()
+                .findRoundableTargets(
+                    viewSwiped = swiped,
+                    stackScrollLayout = stackScrollLayout,
+                    sectionsManager = sectionsManager,
+                )
+
+        val expected =
+            RoundableTargets(
+                before = children.notificationHeaderWrapper, // group header
+                swiped = swiped,
+                after = children.attachedChildren[1],
+            )
+        assertEquals(expected, actual)
+    }
+
+    @Test
+    fun targetsForMiddleNotificationInGroup() {
+        val children = notificationTestHelper.createGroup(3).childrenContainer
+        val swiped = children.attachedChildren[1]
+
+        val actual =
+            notificationTargetsHelper()
+                .findRoundableTargets(
+                    viewSwiped = swiped,
+                    stackScrollLayout = stackScrollLayout,
+                    sectionsManager = sectionsManager,
+                )
+
+        val expected =
+            RoundableTargets(
+                before = children.attachedChildren[0],
+                swiped = swiped,
+                after = children.attachedChildren[2],
+            )
+        assertEquals(expected, actual)
+    }
+
+    @Test
+    fun targetsForLastNotificationInGroup() {
+        val children = notificationTestHelper.createGroup(3).childrenContainer
+        val swiped = children.attachedChildren[2]
+
+        val actual =
+            notificationTargetsHelper()
+                .findRoundableTargets(
+                    viewSwiped = swiped,
+                    stackScrollLayout = stackScrollLayout,
+                    sectionsManager = sectionsManager,
+                )
+
+        val expected =
+            RoundableTargets(
+                before = children.attachedChildren[1],
+                swiped = swiped,
+                after = null,
+            )
+        assertEquals(expected, actual)
+    }
+}