fragment/src/androidTest/res/anim/long_fade_out.xml

<?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="1.0" android:toAlpha="0.0"
       android:duration="5000" />