Loading previews and holographic icons in background thread using AsyncTasks.

- Adding back animation between tabs

Change-Id: I1a49bfca4f85f579e232861aa02d08fb25d0aafc
diff --git a/src/com/android/launcher2/HolographicOutlineHelper.java b/src/com/android/launcher2/HolographicOutlineHelper.java
index 80548fb..d2e1e7e 100644
--- a/src/com/android/launcher2/HolographicOutlineHelper.java
+++ b/src/com/android/launcher2/HolographicOutlineHelper.java
@@ -81,15 +81,15 @@
      * Returns the interpolated holographic highlight alpha for the effect we want when scrolling
      * pages.
      */
-    public float highlightAlphaInterpolator(float r) {
-        float maxAlpha = 0.8f;
+    public static float highlightAlphaInterpolator(float r) {
+        float maxAlpha = 0.6f;
         return (float) Math.pow(maxAlpha * (1.0f - r), 1.5f);
     }
 
     /**
      * Returns the interpolated view alpha for the effect we want when scrolling pages.
      */
-    public float viewAlphaInterpolator(float r) {
+    public static float viewAlphaInterpolator(float r) {
         final float pivot = 0.95f;
         if (r < pivot) {
             return (float) Math.pow(r / pivot, 1.5f);