dialog_bottom_exit.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="200"
    android:interpolator="@android:anim/accelerate_interpolator">

    <translate
        android:fromYDelta="0%"
        android:toYDelta="100%" />

    <alpha
        android:fromAlpha="1"
        android:toAlpha="0" />

</set>