res/anim/dialog_exit.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
/*
 * Copyright (C) 2011 Google Inc.
 * Licensed to 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.
 */
-->
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:shareInterpolator="false" >
    <scale android:fromXScale="1.0" android:toXScale="0.9"
        android:fromYScale="1.0" android:toYScale="0.9"
        android:pivotX="50%" android:pivotY="50%"
        android:interpolator="@android:interpolator/decelerate_quint"
        android:duration="@integer/dialog_animationDefaultDur" />
    <alpha android:fromAlpha="1.0" android:toAlpha="0.0"
        android:interpolator="@android:interpolator/decelerate_cubic"
        android:duration="@integer/dialog_animationShortDur"/>
</set>