title: paypal account implementation in android application
body: <p>I want to implement Paypal functions in my own android app like what I can do anything from my web Paypal account I want to do in app.
  is there any API of paypal for this purpose which will give me the login details of user and will help the user to perform transactions from mobile app.
  I'm not talking about receiving payment from my own Paypal account, I want to do what I can do in my web Paypal account.
  Any help would be much appreciated. Thanks :)  </p>