animacion.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">


    <scale
        android:duration="200"
        android:fromXScale="3.0"
        android:fromYScale="2.0"
        android:pivotX="@android:integer/config_shortAnimTime"
        android:pivotY="@android:integer/config_shortAnimTime"/>

</set>