Improve Recent Apps scrolling performance

- 20fps improvement using software rendering
- 10fps improvement using hardware rendering
- in sw mode, rendering recents background in the recent items themselves and using a bitmap cache to draw individual items (gives perf gains for sw mode)
- in sw and hw mode, no longer doing a fade on the recents scroll view (gives perf gains for hw mode) - instead we draw a black gradient where we would normally fade
- fading recents & notifications immediately when swiped
- removing unused code

Change-Id: I908e2a25b89c9dfbf9b8c8f3810fa43064261b33

1 files changed, 3 insertions, 4 deletions

diff --git a/packages/SystemUI/res/layout-land/status_bar_recent_panel.xml b/packages/SystemUI/res/layout-land/status_bar_recent_panel.xml
index 20ef7cf..f84cc19 100644
--- a/packages/SystemUI/res/layout-land/status_bar_recent_panel.xml
+++ b/packages/SystemUI/res/layout-land/status_bar_recent_panel.xml
@@ -30,13 +30,12 @@
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:layout_alignParentBottom="true"
-        android:paddingBottom="@*android:dimen/status_bar_height"
         android:clipToPadding="false"
         android:clipChildren="false">
 
         <LinearLayout android:id="@+id/recents_glow"
             android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
+            android:layout_height="match_parent"
             android:layout_gravity="bottom|right"
             android:orientation="horizontal"
             android:clipToPadding="false"
@@ -44,7 +43,7 @@
             >
             <com.android.systemui.recent.RecentsHorizontalScrollView android:id="@+id/recents_container"
                 android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
+                android:layout_height="match_parent"
                 android:layout_marginRight="@dimen/status_bar_recents_right_glow_margin"
                 android:divider="@null"
                 android:stackFromBottom="true"
@@ -58,7 +57,7 @@
 
                 <LinearLayout android:id="@+id/recents_linear_layout"
                     android:layout_width="wrap_content"
-                    android:layout_height="wrap_content"
+                    android:layout_height="match_parent"
                     android:orientation="horizontal"
                     android:clipToPadding="false"
                     android:clipChildren="false">