Facebook SDK 3：如何按字母顺序对朋友列表进行排序（Android）

Question

使用Facebook SDK 3 ，我得到了我的朋友列表的GraphUser列表，但是当我将其放入自定义ListView每个人都处于GraphUser状态。

SDK是否可以按名字的字母顺序对列表进行排序？ 我尝试做Collections.sort但它不识别GraphUser 。

救命！

获取FB Friends，并将其放入List GraphUser中，然后将其传递给ArrayAdapter

private List<GraphUser> fbFriends;

private void requestFacebookFriends(Session session) {
    Request friendsRequest = createRequest(session);
    friendsRequest.setCallback(new Request.Callback() {
        @Override
        public void onCompleted(Response response) {
            fbFriends = getResults(response);
            FriendsListAdapter adapter = new FriendsListAdapter(PickFriendActivity.this, R.layout.listview_row_friend, fbFriends);
            listView.setAdapter(adapter);
        }
    });
    friendsRequest.executeAsync();
}

private Request createRequest(Session session) {
    Request request = Request.newGraphPathRequest(session, "me/friends", null);

    Set<String> fields = new HashSet<String>();
    String[] requiredFields = new String[] {"id", "name", "picture"};
    fields.addAll(Arrays.asList(requiredFields));

    Bundle parameters = request.getParameters();
    parameters.putString("fields", TextUtils.join(",", fields));
    request.setParameters(parameters);

    return request;
}

private List<GraphUser> getResults(Response response) {
    GraphMultiResult multiResult = response.getGraphObjectAs(GraphMultiResult.class);
    GraphObjectList<GraphObject> data = multiResult.getData();
    return data.castToListOf(GraphUser.class);
}

带答案的更新

private class FriendComparator implements Comparator<Friend> {
        @Override
        public int compare(Friend user1, Friend user2) {
            return user1.getFbName().compareTo(user2.getFbName());
        }
    }

Collections.sort(fbFriends, new FriendComparator());

Answer 1

使用具有比较器对象的Collection.sort，并为GraphUsers定义一个比较器，以比较名称。