How to stop user from login screen second time if app is already started once?
<p>I am making a app having login screen.The validation &amp; other stuff of login is handled by webservice.</p>

<p>My question is that if the user installed the application,then if for the first time user runs the application, a login screen appears to do login through the details given by user at downloading time from market.If user successfully logs in then at second time when he/she runs app,login screen should not appear.</p>

<p>Can anyone help me out.
Thanks in advance.  </p>
