Merge "Set proper interpolators and durations for the bubble bar animations" into main
diff --git a/quickstep/src/com/android/launcher3/taskbar/bubbles/BubbleBarView.java b/quickstep/src/com/android/launcher3/taskbar/bubbles/BubbleBarView.java
index c5d649e..d15fcf4 100644
--- a/quickstep/src/com/android/launcher3/taskbar/bubbles/BubbleBarView.java
+++ b/quickstep/src/com/android/launcher3/taskbar/bubbles/BubbleBarView.java
@@ -38,6 +38,7 @@
 import android.view.accessibility.AccessibilityNodeInfo;
 import android.widget.FrameLayout;
 
+import com.android.app.animation.Interpolators;
 import com.android.launcher3.R;
 import com.android.launcher3.anim.AnimatorListeners;
 import com.android.launcher3.taskbar.BarsLocationAnimatorHelper;
@@ -86,7 +87,7 @@
     private static final int MAX_BUBBLES = 5;
     private static final int MAX_VISIBLE_BUBBLES_COLLAPSED = 2;
     private static final int ARROW_POSITION_ANIMATION_DURATION_MS = 200;
-    private static final int WIDTH_ANIMATION_DURATION_MS = 200;
+    private static final int WIDTH_ANIMATION_DURATION_MS = 400;
     private static final int SCALE_ANIMATION_DURATION_MS = 200;
 
     /**
@@ -143,7 +144,7 @@
 
     // An animator that represents the expansion state of the bubble bar, where 0 corresponds to the
     // collapsed state and 1 to the fully expanded state.
-    private final ValueAnimator mWidthAnimator = ValueAnimator.ofFloat(0, 1);
+    private ValueAnimator mWidthAnimator = createExpansionAnimator(/* expanding = */ false);
 
     /** An animator used for animating individual bubbles in the bubble bar while expanded. */
     @Nullable
@@ -207,35 +208,6 @@
 
         mBubbleBarBackground = new BubbleBarBackground(context, getBubbleBarExpandedHeight());
         setBackgroundDrawable(mBubbleBarBackground);
-
-        mWidthAnimator.setDuration(WIDTH_ANIMATION_DURATION_MS);
-
-        addAnimationCallBacks(mWidthAnimator,
-                /* onStart= */ () -> mBubbleBarBackground.showArrow(true),
-                /* onEnd= */ () -> {
-                    mBubbleBarBackground.showArrow(mIsBarExpanded);
-                    if (!mIsBarExpanded && mReorderRunnable != null) {
-                        mReorderRunnable.run();
-                        mReorderRunnable = null;
-                    }
-                    // If the bar was just collapsed and the overflow was the last bubble that was
-                    // selected, set the first bubble as selected.
-                    if (!mIsBarExpanded && mUpdateSelectedBubbleAfterCollapse != null
-                            && mSelectedBubbleView != null
-                            && mSelectedBubbleView.getBubble() instanceof BubbleBarOverflow) {
-                        BubbleView firstBubble = (BubbleView) getChildAt(0);
-                        mUpdateSelectedBubbleAfterCollapse.accept(firstBubble.getBubble().getKey());
-                    }
-                    // If the bar was just expanded, remove the dot from the selected bubble.
-                    if (mIsBarExpanded && mSelectedBubbleView != null) {
-                        mSelectedBubbleView.markSeen();
-                    }
-                    updateLayoutParams();
-                },
-                /* onUpdate= */ animator -> {
-                    updateBubblesLayoutProperties(mBubbleBarLocation);
-                    invalidate();
-                });
     }
 
 
@@ -1251,11 +1223,8 @@
             mIsBarExpanded = isBarExpanded;
             updateArrowForSelected(/* shouldAnimate= */ false);
             setOrUnsetClickListener();
-            if (isBarExpanded) {
-                mWidthAnimator.start();
-            } else {
-                mWidthAnimator.reverse();
-            }
+            mWidthAnimator = createExpansionAnimator(isBarExpanded);
+            mWidthAnimator.start();
             updateBubbleAccessibilityStates();
             announceExpandedStateChange();
         }
@@ -1492,6 +1461,46 @@
         return bubbles;
     }
 
+    /** Creates an animator based on the expanding or collapsing action. */
+    private ValueAnimator createExpansionAnimator(boolean expanding) {
+        float startValue = expanding ? 0 : 1;
+        if ((mWidthAnimator != null && mWidthAnimator.isRunning())) {
+            startValue = (float) mWidthAnimator.getAnimatedValue();
+            mWidthAnimator.cancel();
+        }
+        float endValue = expanding ? 1 : 0;
+        ValueAnimator animator = ValueAnimator.ofFloat(startValue, endValue);
+        animator.setDuration(WIDTH_ANIMATION_DURATION_MS);
+        animator.setInterpolator(Interpolators.EMPHASIZED);
+        addAnimationCallBacks(animator,
+                /* onStart= */ () -> mBubbleBarBackground.showArrow(true),
+                /* onEnd= */ () -> {
+                    mBubbleBarBackground.showArrow(mIsBarExpanded);
+                    if (!mIsBarExpanded && mReorderRunnable != null) {
+                        mReorderRunnable.run();
+                        mReorderRunnable = null;
+                    }
+                    // If the bar was just collapsed and the overflow was the last bubble that was
+                    // selected, set the first bubble as selected.
+                    if (!mIsBarExpanded && mUpdateSelectedBubbleAfterCollapse != null
+                            && mSelectedBubbleView != null
+                            && mSelectedBubbleView.getBubble() instanceof BubbleBarOverflow) {
+                        BubbleView firstBubble = (BubbleView) getChildAt(0);
+                        mUpdateSelectedBubbleAfterCollapse.accept(firstBubble.getBubble().getKey());
+                    }
+                    // If the bar was just expanded, remove the dot from the selected bubble.
+                    if (mIsBarExpanded && mSelectedBubbleView != null) {
+                        mSelectedBubbleView.markSeen();
+                    }
+                    updateLayoutParams();
+                },
+                /* onUpdate= */ anim -> {
+                    updateBubblesLayoutProperties(mBubbleBarLocation);
+                    invalidate();
+                });
+        return animator;
+    }
+
     /**
      * Returns the distance between the top left corner of the bubble bar to the center of the dot
      * of the selected bubble.
diff --git a/quickstep/src/com/android/launcher3/taskbar/bubbles/BubbleBarViewController.java b/quickstep/src/com/android/launcher3/taskbar/bubbles/BubbleBarViewController.java
index 6db62b5..e8fc625 100644
--- a/quickstep/src/com/android/launcher3/taskbar/bubbles/BubbleBarViewController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/bubbles/BubbleBarViewController.java
@@ -34,6 +34,7 @@
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 
+import com.android.app.animation.Interpolators;
 import com.android.launcher3.DeviceProfile;
 import com.android.launcher3.R;
 import com.android.launcher3.anim.AnimatedFloat;
@@ -69,6 +70,9 @@
     private static final float APP_ICON_LARGE_DP = 52f;
     /** The dot size is defined as a percentage of the icon size. */
     private static final float DOT_TO_BUBBLE_SIZE_RATIO = 0.228f;
+    public static final int TASKBAR_FADE_IN_DURATION_MS = 150;
+    public static final int TASKBAR_FADE_IN_DELAY_MS = 50;
+    public static final int TASKBAR_FADE_OUT_DURATION_MS = 100;
     private final SystemUiProxy mSystemUiProxy;
     private final TaskbarActivityContext mActivity;
     private final BubbleBarView mBarView;
@@ -862,10 +866,15 @@
         if (!mBubbleStashController.isBubblesShowingOnHome()
                 && !mBubbleStashController.isTransientTaskBar()) {
             boolean hideTaskbar = isBubbleBarExpanded && isIntersectingTaskbar();
-            mTaskbarViewPropertiesProvider
-                    .getIconsAlpha()
-                    .animateToValue(hideTaskbar ? 0 : 1)
-                    .start();
+            Animator taskbarAlphaAnimator = mTaskbarViewPropertiesProvider.getIconsAlpha()
+                    .animateToValue(hideTaskbar ? 0 : 1);
+            taskbarAlphaAnimator.setDuration(hideTaskbar
+                    ? TASKBAR_FADE_OUT_DURATION_MS : TASKBAR_FADE_IN_DURATION_MS);
+            if (!hideTaskbar) {
+                taskbarAlphaAnimator.setStartDelay(TASKBAR_FADE_IN_DELAY_MS);
+            }
+            taskbarAlphaAnimator.setInterpolator(Interpolators.LINEAR);
+            taskbarAlphaAnimator.start();
         }
     }