code: public void authenticate(FragmentActivity activity) {
          authenticate(activity, EvernoteLoginFragment.create(mConsumerKey, mConsumerSecret, mSupportAppLinkedNotebooks, mLocale));
      }
docs: Recommended approach to authenticate the user. If the main Evernote app is installed and up to date,
  the app is launched and authenticates the user. Otherwise the old OAuth process is launched and
  the user needs to enter his credentials.
  
  <p/>
  
  Your {@link FragmentActivity} should implement {@link EvernoteLoginFragment.ResultCallback} to receive
  the authentication result. Alternatively you can extend {@link EvernoteLoginFragment} and override
  {@link EvernoteLoginFragment#onLoginFinished(boolean)}.
  
  @param activity The {@link FragmentActivity} holding the progress dialog.