Rohit, which will mean that you need to implement OpenID on your server. To do this, you need to write a couple of pages in your web application that take care of OpenID authentication .. then if you want your mobile users to log in using OpneID, you can simply open this web page (where you implemented OpenID ) from your application using any web view component or some other appropriate component, whatever it may be. Track the user's navigation to the success page to determine if the user is authenticated or not.
this is one way .. otherwise ... there may be other ways.
luck
Sameer
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