org.ntlab.acanthus_client / app / src / main / res / anim / alpha_fadeout.xml

<?xml version="1.0" encoding="utf-8"?>
<alpha xmlns:android="http://schemas.android.com/apk/res/android"
    android:interpolator="@android:anim/decelerate_interpolator"
    android:fromAlpha="1.0"
    android:toAlpha="0.0"
    android:fillAfter="true"
    android:duration="3000"
    />