space-android/res/anim/disappear.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">

	<alpha
		android:interpolator="@android:anim/decelerate_interpolator"
		android:fromAlpha="1.0" android:toAlpha="0.0"
		android:duration="400"
	/>
</set>