title: How to fill progress bar smoothly with animation
body: <p>I have implemented the progress bar with fill animation, but I would like to have a animation effect like a train and which would fill fast to a particular point and then a bit slow brake in the speed till the end point. My current animation implementation is:</p>
  
  <pre><code>ObjectAnimator animation = ObjectAnimator.ofInt(pbOption, "progress", percent);
  animation.setDuration(1250);
  animation.setInterpolator(new AccelerateInterpolator());
  animation.start();
  </code></pre>