[android-developers] Button Animation

hi
I have a problem with an animation of a button.
I would move and fade a button from a origin position to another
position. well i created a translate animation and fade animation, i
start the animation with the follow code:

AnimationSet exchangeAnimation = new AnimationSet(true);
exchangeAnimation.setFillAfter(true);
exchangeAnimation.setAnimationListener(new AnimationListener() {
public void onAnimationStart(Animation anim)
{button.setEnabled(false);}
public void onAnimationRepeat(Animation anim) {}
public void onAnimationEnd(Animation anim) {
button.setEnabled(true);}});
exchangeAnimation.addAnimation(AnimationHelper.fadeAnimation(0,
1, 2000));
//i valori passati come fromX, toX, fromY e toY sono dati da un
rapporto e vanno da 0.0F a 1.0F
//quindi bisogna calcolari come pos voluta / width screen o
height screen

exchangeAnimation.addAnimation(AnimationHelper.translateAnimation(0.0F,
0.5F, 0.0F, 0.5F, 1500));
button.startAnimation(exchangeAnimation);

So, my problem is that while the button moves to the position that I
want, the hit area remains at the point of origin.

somebody can help me on how to correctly position the hit area of the
button?

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