I am into an android app where i need to develop features like when user login via Facebook or Instagram then this will get all videos/photos from Facebook or Instagram and save it on app server without using Facebook SDK. Facebook SDK will increase the size of the app, that we don't want so we need to do without SDK.
So my question is what steps i need to take to get all media from facebook and instagram server and save it on our app server when user login from our app but without SDK (just to avoid app size increment)
Thanks.