title: Why don't set CircleImageView of android support v4 library public?
body: <p>I have noticed <code>android.support.v4.widget.CircleImageView</code> for long. Every time I want to use an <code>ImageView</code> in a round shape, <code>CircleImageView</code> would appear in my mind. I have tried to use it for many times, but every time, I failed. Because the access permission of <code>android.support.v4.widget.CircleImageView</code> is <strong><em>default</em></strong> which means only classes in the same package with <code>CircleImageView</code>, namely, <code>android.support.v4.widget</code>, are able to access it.</p>
  
  <p>I can't understand now that round <code>ImageView</code> is used in common, why don't set <code>CircleImageView</code> to public so that developers don't have to override an <code>ImageView</code> into a Round ImageView? Isn't it that Google Android team force us to <strong>reinvent wheels</strong>?</p>
  
  <p>Or, don't I know this <code>CircleImageView</code> well?</p>
  
  <p>Any tips will be appreciated. Thanks in advance.</p>