Cannot activate View Touch Event After Animation end

Question

I add animation on a Button, use .SetFillAfter(true) to keep the last view on screen. But I find it impossible to call touch event function by touching Button icon on the screen any more (but it can be called by touching original position).

<?xml version="1.0" encoding="utf-8"?>
<AbsoluteLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<Button
    android:id ="@+id/button"  
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:text="Move"
    />
</AbsoluteLayout>

---

  anim = AnimationUtils.loadAnimation(this, R.anim.move);
  anim.setInterpolator(this, android.R.anim.accelerate_decelerate_interpolator);