<!-- Top most LinearLayout-->
<LinearLayout>

    <!-- LinearLayout containing android:animateLayoutChanges="true"-->
    <LinearLayout>

        <!-- RelativeLayout containing button to toggle LinearLayout visibility below-->
        <RelativeLayout>
        </RelativeLayout>

        <!-- LinearLayout that has its visibility toggled -->
        <LinearLayout>
        </LinearLayout>

    </LinearLayout>

</LinearLayout>

<LinearLayout
    android:id="@+id/form_container"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical" >

    <!-- This is where the previous XML layout containing the toggle-able LinearLayout
         is inserted programmatically. -->

    <!-- This button snaps back up to the top before the animation is complete. -->
    <Button />

</LinearLayout>

myButton.animate().translationY(floatYposition).setDuration(300); //300 milliseconds

<LinearLayout android:id="@+id/transitions_container">

    <!--add your widgets here-->

</LinearLayout>

final ViewGroup transitionsContainer = (ViewGroup) view.findViewById(R.id.transitions_container);

button.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        TransitionManager.beginDelayedTransition(transitionsContainer);
        // do your staff with changing children of transitionsContainer
    }
});