change drawable of animated clip with code

Question

Alright, it is troubling me for quite some time now, so here it goes:

main.xml

<ImageView
    android:id="@+id/some_id
    android:src="@drawable/some_clip"
    android:layout_width="180dp"
    android:layout_height="240dp"/>

some_clip.xml

<clip xmlns:android="http://schemas.android.com/apk/res/android"
  android:clipOrientation="vertical"
  android:drawable="@drawable/my_drawable_that_i_want_to_change"
  android:gravity="bottom"/>

I'm trying to access some_clip.xml and be able to change the drawable by code, is this possible. Any help or guidelines are appreciated!