Android: How to authenticate an user?
<p>I'm an android developer that ported from django web development.</p>

<p>I have two questions here:</p>

<ul>
<li><p>Without using traditional HTTP request, how can I communicate with
server?</p></li>
<li><p>How to authenticate an user?</p></li>
</ul>

<p>Many Thanks.</p>
