As mentioned in the Graph API v2.0 upgrading guide (https://developers.facebook.com/docs/apps/upgrading#upgrading_v2_0_user_ids)
/me/friends
returns the user’s friends who are also using your app In
v2.0, the friends API endpoint returns the list of a person’s friends
who are also using your app. In v1.0, the response included all of a
person’s friends.There are two key use cases where apps need access to non-app friends:
tagging and inviting. In v2.0, we’ve added the Taggable Friends API
and the Invitable Friends API to support these flows.After a person has logged in with v2.0 of Facebook Login, calling
/v1.0/me/friends and/v2.0/me/friends` will both result in the v2.0
behaviour – both calls will return the set of the person’s friends who
also use the app.
So, in v2.0 you’ll only be able to get all friends via the /me/taggable_friends
(https://developers.facebook.com/docs/graph-api/reference/v2.0/user/taggable_friends) endpoint, which only contains the fields id
, name
, picture
, and only can be used after a review of your app by Facebook.