title: reset animation effects in android
body: <p>I am performing a fade effect on a button.</p>
  
  <pre><code>AnimationSet set = new AnimationSet(true);
  Animation animation2 = new AlphaAnimation((float) 0, 1);
  animation2.setDuration(1500);
  animation2.setRepeatMode(0);
  set.addAnimation(animation2);
  set.setFillAfter(true); // leaves the animation in its final status
  btn.startAnimation(set);
  </code></pre>
  
  <p>I am using the <code>setFillAfter(true)</code> option to leave the button visible. That works fine. Now I would like to perform the animation again, <strong>but can't never set again my button to be invisible on the screen</strong>, unless I restart the app. (alos tried invalidate() with no success...)</p>
  
  <p>Any idea would be "so" welcome.</p>
  
  <p>Thanks in advance!
  Paul</p>