title: view animation doesn't work in dialog while call show for the 2nd time
body: <p>I just created a dialog, and there is an <code>ImageView</code> in it. When I call <code>show()</code> method, the animation works fine, but for the second time I call <code>show()</code>, the animation doesn`t work. Anyone knows why? (The dialog was only created once)</p>
  
  <pre><code>ImageView iv_loading = (ImageView) view.findViewById(R.id.iv_submitloading);
  Animation animation=AnimationUtils.loadAnimation(context,R.anim.loading_view_anim);
  iv_loading.setAnimation(animation);
  </code></pre>