I am making mobile app using Sencha touch which will be bundled as native app and installed on devices. In my app on certain pages I want to add "share" functionality which is supposed to post some data to user's feed. While testing on browser I can to do that by opening a window with FB sharing url like "https://m.facebook.com/dialog/feed" or "https://m.facebook.com/sharer.php" and passing all related params as explained in https://developers.facebook.com/docs/reference/dialogs/feed/
But when this app is bundled and I share with this, user is moved to browser and cannot return to app because redirect_uri cannot point to app which is why I wanted to open this dialog within my app, probably in an iFrame. This is also not possible because these dialogs are not allowed to be embedded in iframe by META tags and in order to surpass it I have to do user login which again is another dialog which I cannot open in my app's iFrame.
I also looked at sample sencha app http://blooming-day-7830.herokuapp.com/ but it also takes user to separate login page instead of opening in-app dialog.
So my questions is how does hybrid apps connect with FB without moving out user to browser?