current/support/v4/src/tests/res/anim/long_fade_in.xml - platform/prebuilts/sdk - Git at Google

 <?xml version="1.0" encoding="utf-8"?>

 <alpha xmlns:android="http://schemas.android.com/apk/res/android"
        android:interpolator="@android:interpolator/decelerate_quad"
        android:fromAlpha="0.0" android:toAlpha="1.0"
        android:duration="5000" />
	<?xml version="1.0" encoding="utf-8"?>

	<alpha xmlns:android="http://schemas.android.com/apk/res/android"
	android:interpolator="@android:interpolator/decelerate_quad"
	android:fromAlpha="0.0" android:toAlpha="1.0"
	android:duration="5000" />