simplauncher/app/src/main/res/anim/slide_down_exit.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:shareInterpolator="@android:anim/accelerate_decelerate_interpolator">
    <translate
        android:duration="@android:integer/config_shortAnimTime"
        android:fromYDelta="0%p"
        android:toYDelta="100%p" />

    <alpha
        android:duration="@android:integer/config_shortAnimTime"
        android:fromAlpha="1.0"
        android:toAlpha="0.0" />
</set>