Facebook login: Integration between openFB library and facebook app

[prova8989]

Hello, I have a problem, I used openFB in my Cordova (Ionic) App (emulated Android) for Facebook login and it works fine (like in this example https://github.com/agrawroh/sociogram-angular-ionic ), but I wished that if I was logged on Facebook app (facebook app downloaded from Google Play and NOT through inappbrowser plugin with a browser page opened in my app) I'm not asked to log on to facebook again because I'm just logged on Facebook app. It's possible to recognize that I'm already logged on Facebook app (and NOT in a browser page with inappbrowser plugin ) ? How can i do it?
Thank you very much
Best regards