res/anim/combo_view_exit.xml

<?xml version="1.0" encoding="utf-8"?>
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<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:interpolator="@android:anim/accelerate_interpolator">
        <translate android:fromYDelta="0" android:toYDelta="50%"
            android:duration="@android:integer/config_longAnimTime"/>
        <alpha android:fromAlpha="1.0" android:toAlpha="0.0"
            android:duration="@android:integer/config_longAnimTime" />
</set>