core/res/res/anim/wallpaper_close_exit.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
/*
** Copyright 2009, 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.
*/
-->

<!-- This version zooms the new non-wallpaper up out of the
     wallpaper, without zooming the wallpaper itself. -->
<set xmlns:android="http://schemas.android.com/apk/res/android"
        android:interpolator="@anim/decelerate_interpolator"
        android:detachWallpaper="true">
    <scale android:fromXScale="1.0" android:toXScale="2.0"
           android:fromYScale="1.0" android:toYScale="2.0"
           android:pivotX="50%p" android:pivotY="50%p"
           android:duration="@android:integer/config_mediumAnimTime" />
</set>

<!-- This version zooms the new non-wallpaper down on top of the
     wallpaper, without zooming the wallpaper itself. -->
<!--
<set xmlns:android="http://schemas.android.com/apk/res/android"
        android:interpolator="@anim/decelerate_interpolator"
        android:detachWallpaper="true">
    <scale android:fromXScale="1.0" android:toXScale=".5"
           android:fromYScale="1.0" android:toYScale=".5"
           android:pivotX="50%p" android:pivotY="50%p"
           android:duration="@android:integer/config_mediumAnimTime" />
</set>
-->

<!-- This version zooms the new non-wallpaper down on top of the
     wallpaper.  The wallpaper here just stays fixed behind. -->
<!--
<set xmlns:android="http://schemas.android.com/apk/res/android"
        android:interpolator="@anim/decelerate_interpolator"
        android:zAdjustment="top">
    <scale android:fromXScale="1.0" android:toXScale=".5"
           android:fromYScale="1.0" android:toYScale=".5"
           android:pivotX="50%p" android:pivotY="50%p"
           android:duration="@android:integer/config_mediumAnimTime" />
    <alpha android:fromAlpha="1.0" android:toAlpha="0"
            android:duration="@android:integer/config_mediumAnimTime"/>
</set>
-->

<!-- This version is a variation on the inter-activity slide that
    also scales the wallpaper. -->
<!--
<set xmlns:android="http://schemas.android.com/apk/res/android"
        android:interpolator="@anim/decelerate_interpolator"
        android:zAdjustment="top">
    <scale android:fromXScale="1.0" android:toXScale="2.0"
           android:fromYScale="1.0" android:toYScale="2.0"
           android:pivotX="100%p" android:pivotY="50%p"
           android:duration="@android:integer/config_mediumAnimTime" />
	<translate android:fromXDelta="0%" android:toXDelta="-100%"
        android:duration="@android:integer/config_mediumAnimTime"/>
</set>
-->