Tune app closing/launcher resume animation "spring" values.

Bug: 109828964
Change-Id: I64252667451f511b7affdde5ffb28812876e7f4c

3 files changed, 16 insertions, 13 deletions

diff --git a/quickstep/res/values/dimens.xml b/quickstep/res/values/dimens.xml
index 17d5c60ba..675b26112 100644
--- a/quickstep/res/values/dimens.xml
+++ b/quickstep/res/values/dimens.xml
@@ -33,7 +33,8 @@
 
     <!-- Launcher app transition -->
     <dimen name="content_trans_y">50dp</dimen>
-    <dimen name="springs_trans_y">-70dp</dimen>
+    <dimen name="springs_start_slide_trans_y">-100dp</dimen>
+    <dimen name="springs_end_slide_trans_y">6.25dp</dimen>
     <dimen name="closing_window_trans_y">115dp</dimen>
 
     <dimen name="recents_empty_message_text_size">16sp</dimen>
diff --git a/quickstep/src/com/android/launcher3/LauncherAppTransitionManagerImpl.java b/quickstep/src/com/android/launcher3/LauncherAppTransitionManagerImpl.java
index 252e3eaee..b9ff28456 100644
--- a/quickstep/src/com/android/launcher3/LauncherAppTransitionManagerImpl.java
+++ b/quickstep/src/com/android/launcher3/LauncherAppTransitionManagerImpl.java
@@ -125,13 +125,13 @@ public class LauncherAppTransitionManagerImpl extends LauncherAppTransitionManag
     // Progress = 0: All apps is fully pulled up, Progress = 1: All apps is fully pulled down.
     public static final float ALL_APPS_PROGRESS_OFF_SCREEN = 1.3059858f;
 
-    private static final int APP_CLOSE_ROW_START_DELAY_MS = 8;
+    private static final int APP_CLOSE_ROW_START_DELAY_MS = 9;
 
-    // The sum of [slide, oscillate, and settle] should be <= LAUNCHER_RESUME_TOTAL_DURATION.
-    private static final int LAUNCHER_RESUME_TOTAL_DURATION = 346;
-    private static final int SPRING_SLIDE_DURATION = 166;
-    private static final int SPRING_OSCILLATE_DURATION = 130;
-    private static final int SPRING_SETTLE_DURATION = 50;
+    private static final int SPRING_SLIDE_DURATION = 170;
+    private static final int SPRING_OSCILLATE_DURATION = 550;
+    private static final int SPRING_SETTLE_DURATION = 25;
+
+    private static final int SPRING_ALPHA_DURATION = 100;
 
     private final Launcher mLauncher;
     private final DragLayer mDragLayer;
@@ -173,8 +173,8 @@ public class LauncherAppTransitionManagerImpl extends LauncherAppTransitionManag
         Resources res = mLauncher.getResources();
         mContentTransY = res.getDimensionPixelSize(R.dimen.content_trans_y);
         mClosingWindowTransY = res.getDimensionPixelSize(R.dimen.closing_window_trans_y);
-        mStartSlideTransY = res.getDimensionPixelSize(R.dimen.springs_trans_y);
-        mEndSlideTransY = -mStartSlideTransY * 0.1f;
+        mStartSlideTransY = res.getDimensionPixelSize(R.dimen.springs_start_slide_trans_y);
+        mEndSlideTransY = res.getDimensionPixelSize(R.dimen.springs_end_slide_trans_y);
 
         mLauncher.addOnDeviceProfileChangeListener(this);
         registerRemoteAnimations();
@@ -837,7 +837,7 @@ public class LauncherAppTransitionManagerImpl extends LauncherAppTransitionManag
         v.setAlpha(0);
         ObjectAnimator alpha = ObjectAnimator.ofFloat(v, View.ALPHA, 1f);
         alpha.setInterpolator(LINEAR);
-        alpha.setDuration(SPRING_SLIDE_DURATION + SPRING_OSCILLATE_DURATION);
+        alpha.setDuration(SPRING_ALPHA_DURATION);
         alpha.setStartDelay(startDelay);
         outAnimator.play(alpha);
 
diff --git a/src/com/android/launcher3/anim/Interpolators.java b/src/com/android/launcher3/anim/Interpolators.java
index 8a1abf412..389da4807 100644
--- a/src/com/android/launcher3/anim/Interpolators.java
+++ b/src/com/android/launcher3/anim/Interpolators.java
@@ -119,18 +119,20 @@ public class Interpolators {
     public static final Interpolator OSCILLATE = new Interpolator() {
 
         // Used to scale the oscillations horizontally
-        private final float horizontalScale = 1f;
+        private final float horizontalScale = 4f;
         // Used to shift the oscillations horizontally
-        private final float horizontalShift = 0.5f;
+        private final float horizontalShift = 0.22f;
         // Used to scale the oscillations vertically
         private final float verticalScale = 1f;
         // Used to shift the oscillations vertically
         private final float verticalShift = 1f;
+        // Amplitude of oscillation
+        private final float amplitude = 0.9f;
 
         @Override
         public float getInterpolation(float t) {
             t = horizontalScale * (t + horizontalShift);
-            return (float) ((verticalScale * (Math.exp(-t) * Math.cos(2 * Math.PI * t)))
+            return (float) ((verticalScale * (Math.exp(-t) * Math.cos(amplitude * Math.PI * t)))
                     + verticalShift);
         }
     };