要获得好友数量，请参考以下链接：

https://developers.facebook.com/docs/graph-api/reference/v2.4/user/friends

需要的权限是： user_friends ，您已经包括了..

您将在名称中的字段摘要的 total_count

类似的问题： facebook api on android - 如何获得用户拥有的朋友数量？

  loginBtn.registerCallback（callbackManager，new FacebookCallback< LoginResult>（）{
 @Override 
 public void onSuccess（Login结果loginResult）{
 new GraphRequest（
 loginResult.getAccessToken（），
/ me / friends，
 null，
 HttpMethod.GET，
 new GraphRequest.Callback（）{
 public void onCompleted（GraphResponse response）{
 Log.i（response，response.getJSONArray（）。toString（））; //在响应中找到总结total_count
} 
} 
）.executeAsync（）; 
} 

 @Override 
 public void onCancel（）{
} 

 @Override 
 public void onError（FacebookException exception ）{
} 
}）; 
 

I am able to access the id, firstname, lastname, gender, and email of a GraphUser by using the following code. But, I also need access to "location", "number of friends", "basic info" and "work company". How can this be done? I have tried other *** links, and checked the Facebook SDK link, but not getting a break through. Could I be provided code to directly access the required fields in the same way as the data that I already have?
What other permissions would I need?

loginBtn.setReadPermissions(Arrays.asList("public_profile", "email", "user_friends", "user_birthday", "read_friendlists"));
    loginBtn.setUserInfoChangedCallback(new UserInfoChangedCallback() {
        @Override
        public void onUserInfoFetched(GraphUser user) {
            if (user != null) {
                login_text.setText("Please login to continue");
                userDetails = new JSONObject();
                try {
                    Log.d("user birthday", user.getBirthday());
                    userDetails.put("fbId", user.getId());
                    userDetails.put("firstName", user.getFirstName());
                    userDetails.put("lastName", user.getLastName());
                    userDetails.put("gender", user.getProperty("gender").toString());
                    userDetails.put("email", user.getProperty("email").toString());


                } catch (JSONException e) {
                    Log.d("Error: ", "Error setting user settings in FBActivity");
                }
            } else {
                //login_text.setText("You are not logged");
            }

        }
    });

EDIT:

I got everything except the total number of friends an individual has. How can that be done. I have gone through your links and it seems that I need to call another GraphRequest link. But I don't that. I want the total number of friends (no names, no details, just the number). I have added the permission "user_friends". What code should I write to get the number?

To get number of friends please refer to the following link:

https://developers.facebook.com/docs/graph-api/reference/v2.4/user/friends

Permissions needed would be: user_friends, which you already have included..

You'll get friends count in field 'summary' in the name of total_count

Similar question: facebook api on android - how can I get the number of friends that a user has?

loginBtn.registerCallback(callbackManager, new FacebookCallback<LoginResult>() {
    @Override
    public void onSuccess(LoginResult loginResult) {
        new GraphRequest(
            loginResult.getAccessToken(),
            "/me/friends",
            null,
            HttpMethod.GET,
            new GraphRequest.Callback() {
                public void onCompleted(GraphResponse response) {
                    Log.i("response", response.getJSONArray().toString()); //find the summary 'total_count' in the response
                }
            }
        ).executeAsync();
    }

    @Override
    public void onCancel() {
    }

    @Override
    public void onError(FacebookException exception) {
    }
});