Recents: apps scale down to thumbnails now

As a part of this change, Recents is now an
activity.

Known issues:
* Jank: jump-cut as app icon appears suddenly
  after the aniamtion
* Preloading recents is broken on phones without
  soft nav bar and on tablets
* Thumbnail window from animation lingers/flashes
  sometimes

Change-Id: Ie6f991f3c2e1e67f9ed84eb6adba9174ed957248

Author: mikejurka

packages/SystemUI/AndroidManifest.xml

@@ -53,6 +53,7 @@
     <uses-permission android:name="android.permission.DISABLE_KEYGUARD" />
 
     <application
+        android:name="com.android.systemui.SystemUIApplication"
         android:persistent="true"
         android:allowClearUserData="false"
         android:allowBackup="false"
@@ -96,6 +97,16 @@
                 android:excludeFromRecents="true">
         </activity>
 
+        <activity android:name=".recent.RecentsActivity"
+                android:theme="@android:style/Theme.Holo.Wallpaper.NoTitleBar"
+                android:excludeFromRecents="true"
+                android:launchMode="singleInstance"
+                android:exported="true">
+          <intent-filter>
+            <action android:name="com.android.systemui.TOGGLE_RECENTS" />
+          </intent-filter>
+        </activity>
+
         <!-- started from UsbDeviceSettingsManager -->
         <activity android:name=".usb.UsbConfirmActivity"
             android:exported="true"

packages/SystemUI/res/layout-land/status_bar_recent_panel.xml

@@ -26,11 +26,6 @@
     android:layout_width="match_parent"
     systemui:recentItemLayout="@layout/status_bar_recent_item"
     >
-    <View
-        android:id="@+id/recents_transition_background"
-        android:layout_height="match_parent"
-        android:layout_width="match_parent"
-        android:visibility="invisible" />
     <FrameLayout
         android:id="@+id/recents_bg_protect"
         android:background="@drawable/status_bar_recents_background"
@@ -40,12 +35,6 @@
         android:clipToPadding="false"
         android:clipChildren="false">
 
-        <ImageView
-            android:id="@+id/recents_transition_placeholder_icon"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:visibility="invisible" />
-
         <com.android.systemui.recent.RecentsHorizontalScrollView android:id="@+id/recents_container"
             android:layout_width="wrap_content"
             android:layout_height="match_parent"

packages/SystemUI/res/layout/status_bar_recent_panel.xml

@@ -26,24 +26,13 @@
     android:layout_width="match_parent"
     systemui:recentItemLayout="@layout/status_bar_recent_item"
     >
-    <View
-        android:id="@+id/recents_transition_background"
-        android:layout_height="match_parent"
-        android:layout_width="match_parent"
-        android:visibility="invisible" />
     <FrameLayout
         android:id="@+id/recents_bg_protect"
         android:background="@drawable/status_bar_recents_background"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:layout_alignParentBottom="true">
 
-        <ImageView
-            android:id="@+id/recents_transition_placeholder_icon"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:visibility="invisible" />
-
         <com.android.systemui.recent.RecentsVerticalScrollView
             android:id="@+id/recents_container"
             android:layout_width="match_parent"

packages/SystemUI/res/layout/system_bar_recent_panel.xml

@@ -28,11 +28,6 @@
     android:clipChildren="false"
     systemui:recentItemLayout="@layout/system_bar_recent_item"
     >
-    <View
-        android:id="@+id/recents_transition_background"
-        android:layout_height="match_parent"
-        android:layout_width="match_parent"
-        android:visibility="invisible" />
     <FrameLayout
         android:id="@+id/recents_bg_protect"
         android:background="@drawable/recents_bg_protect_tile"
@@ -42,11 +37,6 @@
         android:layout_marginBottom="@*android:dimen/system_bar_height"
         android:clipToPadding="false"
         android:clipChildren="false">
-        <ImageView
-            android:id="@+id/recents_transition_placeholder_icon"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:visibility="invisible" />
 
         <com.android.systemui.recent.RecentsVerticalScrollView android:id="@+id/recents_container"
             android:layout_width="wrap_content"

packages/SystemUI/res/values/dimens.xml

@@ -28,6 +28,7 @@
     <!-- Size of application thumbnail -->
     <dimen name="status_bar_recents_thumbnail_width">164dp</dimen>
     <dimen name="status_bar_recents_thumbnail_height">145dp</dimen>
+    <dimen name="status_bar_recents_thumbnail_bg_padding">4dp</dimen>
 
     <!-- Size of application label text -->
     <dimen name="status_bar_recents_app_label_text_size">14dip</dimen>

packages/SystemUI/src/com/android/systemui/SystemUIApplication.java

@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.systemui;
+
+import android.app.Application;
+
+import com.android.systemui.recent.RecentTasksLoader;
+
+public class SystemUIApplication extends Application {
+    private RecentTasksLoader mRecentTasksLoader;
+
+    public RecentTasksLoader getRecentTasksLoader() {
+        if (mRecentTasksLoader == null) {
+            mRecentTasksLoader = new RecentTasksLoader(this);
+        }
+        return mRecentTasksLoader;
+    }
+}