activity_close_scale.xml

<?xml version="1.0" encoding="utf-8"?>
 
<set xmlns:android="http://schemas.android.com/apk/res/android">
 
    <scale android:fromXScale="100%p"
          android:toXScale="80%p"
          android:fromYScale="100%p"
          android:toYScale="80%p"
          android:pivotX="50%p"
          android:pivotY="50%p"
          android:duration="@android:integer/config_mediumAnimTime" />
 
    <alpha android:fromAlpha="1"
          android:toAlpha="0.5"
          android:duration="@android:integer/config_mediumAnimTime"/>
 
</set>