Additional changes to improve performance when loading Recents. (Bug 16987565)

- Ensuring that we consistently load activity icon, title and color for both full and shallow stacks
- Adding activity info caches when loading the stacks
- Should not be scaling pin icon when launching from pin
- Tweaking snap-back, over scroll, and shadows

Change-Id: I556b93562bb2c69e4c25ce787a7a34532ab706ca

3 files changed, 10 insertions, 9 deletions

diff --git a/packages/SystemUI/res/values/config.xml b/packages/SystemUI/res/values/config.xml
index e940b18..c84edf7 100644
--- a/packages/SystemUI/res/values/config.xml
+++ b/packages/SystemUI/res/values/config.xml
@@ -123,10 +123,10 @@
     <!-- The min animation duration for animating views that are newly visible. -->
     <integer name="recents_filter_animate_new_views_duration">250</integer>
     <!-- The min animation duration for animating the task bar in. -->
-    <integer name="recents_animate_task_bar_enter_duration">275</integer>
+    <integer name="recents_animate_task_bar_enter_duration">225</integer>
     <!-- The animation delay for animating the first task in. This should roughly be the animation
      duration of the transition in to recents. -->
-    <integer name="recents_animate_task_bar_enter_delay">300</integer>
+    <integer name="recents_animate_task_bar_enter_delay">275</integer>
     <!-- The min animation duration for animating the task bar out. -->
     <integer name="recents_animate_task_exit_to_home_duration">225</integer>
     <!-- The min animation duration for animating the task bar out. -->
@@ -143,6 +143,8 @@
     <integer name="recents_nav_bar_scrim_enter_duration">400</integer>
     <!-- The animation duration for animating the removal of a task view. -->
     <integer name="recents_animate_task_view_remove_duration">250</integer>
+    <!-- The animation duration for scrolling the stack to a particular item. -->
+    <integer name="recents_animate_task_stack_scroll_duration">225</integer>
     <!-- The minimum alpha for the dim applied to cards that go deeper into the stack. -->
     <integer name="recents_max_task_stack_view_dim">96</integer>
     <!-- The delay to enforce between each alt-tab key press. -->
diff --git a/packages/SystemUI/res/values/dimens.xml b/packages/SystemUI/res/values/dimens.xml
index bc941ca..5555aa7 100644
--- a/packages/SystemUI/res/values/dimens.xml
+++ b/packages/SystemUI/res/values/dimens.xml
@@ -195,17 +195,14 @@
     <!-- The size of the application icon in the recents task view. -->
     <dimen name="recents_task_view_application_icon_size">48dp</dimen>
 
-    <!-- The size of the activity icon in the recents task view. -->
-    <dimen name="recents_task_view_activity_icon_size">60dp</dimen>
-
     <!-- The radius of the rounded corners on a task view. -->
     <dimen name="recents_task_view_rounded_corners_radius">2dp</dimen>
 
     <!-- The min translation in the Z index for the last task. -->
-    <dimen name="recents_task_view_z_min">25dp</dimen>
+    <dimen name="recents_task_view_z_min">20dp</dimen>
 
     <!-- The max translation in the Z index for the last task. -->
-    <dimen name="recents_task_view_z_max">100dp</dimen>
+    <dimen name="recents_task_view_z_max">80dp</dimen>
 
     <!-- The amount to translate when animating the removal of a task. -->
     <dimen name="recents_task_view_remove_anim_translation_x">100dp</dimen>
@@ -231,6 +228,9 @@
     <!-- The side padding for the task stack as a percentage of the width. -->
     <item name="recents_stack_width_padding_percentage" format="float" type="dimen">0.04444</item>
 
+    <!-- The overscroll percentage allowed on the stack. -->
+    <item name="recents_stack_overscroll_percentage" format="float" type="dimen">0.0875</item>
+
     <!-- The top offset for the task stack. -->
     <dimen name="recents_stack_top_padding">16dp</dimen>
 
diff --git a/packages/SystemUI/res/values/styles.xml b/packages/SystemUI/res/values/styles.xml
index b39fe24..70f6031 100644
--- a/packages/SystemUI/res/values/styles.xml
+++ b/packages/SystemUI/res/values/styles.xml
@@ -33,8 +33,7 @@
         <item name="android:navigationBarColor">@android:color/transparent</item>
         <item name="android:windowDrawsSystemBarBackgrounds">true</item>
         <item name="android:windowAnimationStyle">@style/Animation.RecentsActivity</item>
-
-        <item name="android:ambientShadowAlpha">0.30</item>
+        <item name="android:ambientShadowAlpha">0.35</item>
     </style>
 
     <!-- Animations for a non-full-screen window or activity. -->