New, less blue overscroll assets with tuned constants in EdgeEffect class.

Glow absorb animation was very slow with high velocity flings. Clamped the velocity
and adjusted constants for start values and duration of absorb animation.

Change-Id: Id2a87814498e05f5f8ceb942dd1d765874461beb

1 files changed, 6 insertions, 4 deletions

diff --git a/core/java/android/widget/EdgeEffect.java b/core/java/android/widget/EdgeEffect.java
index bb4a4cf..30752e0 100644
--- a/core/java/android/widget/EdgeEffect.java
+++ b/core/java/android/widget/EdgeEffect.java
@@ -68,6 +68,8 @@ public class EdgeEffect {
 
     // Minimum velocity that will be absorbed
     private static final int MIN_VELOCITY = 100;
+    // Maximum velocity, clamps at this value
+    private static final int MAX_VELOCITY = 10000;
 
     private static final float EPSILON = 0.001f;
 
@@ -115,7 +117,7 @@ public class EdgeEffect {
     private static final float PULL_DISTANCE_ALPHA_GLOW_FACTOR = 1.1f;
 
     private static final int VELOCITY_EDGE_FACTOR = 8;
-    private static final int VELOCITY_GLOW_FACTOR = 16;
+    private static final int VELOCITY_GLOW_FACTOR = 12;
 
     private int mState = STATE_IDLE;
 
@@ -283,10 +285,10 @@ public class EdgeEffect {
      */
     public void onAbsorb(int velocity) {
         mState = STATE_ABSORB;
-        velocity = Math.max(MIN_VELOCITY, Math.abs(velocity));
+        velocity = Math.min(Math.max(MIN_VELOCITY, Math.abs(velocity)), MAX_VELOCITY);
 
         mStartTime = AnimationUtils.currentAnimationTimeMillis();
-        mDuration = 0.1f + (velocity * 0.03f);
+        mDuration = 0.15f + (velocity * 0.02f);
 
         // The edge should always be at least partially visible, regardless
         // of velocity.
@@ -294,7 +296,7 @@ public class EdgeEffect {
         mEdgeScaleY = mEdgeScaleYStart = 0.f;
         // The glow depends more on the velocity, and therefore starts out
         // nearly invisible.
-        mGlowAlphaStart = 0.5f;
+        mGlowAlphaStart = 0.3f;
         mGlowScaleYStart = 0.f;
 
         // Factor the velocity by 8. Testing on device shows this works best to