android - Facebook SDK - 获取好友详情

Question

我需要获取用户选择的好友的好友详情。

用户可以使用默认的 facebook 好友选择器来选择他的好友。但是当我将选择作为 GraphUser 列表时，我看不到用户的任何详细信息。特别是，我无法获取用户名。

这是好友选择器的 Activity :

public class FacebookFriendPickerActivity extends FragmentActivity {

public static final String IEXTRA_SELECTED_FRIENDS = "selected friends";

private FriendPickerFragment friendPickerFragment;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_facebook_frind_picker);

    Bundle args = getIntent().getExtras();
    FragmentManager manager = getSupportFragmentManager();
    Fragment fragmentToShow = null;

    if (savedInstanceState == null) {
        friendPickerFragment = new FriendPickerFragment(args);
    } else {
        friendPickerFragment = (FriendPickerFragment) manager.findFragmentById(R.id.picker_fragment);
    }
    // Set the listener to handle errors
    friendPickerFragment.setOnErrorListener(new PickerFragment.OnErrorListener() {
        @Override
        public void onError(PickerFragment<?> fragment, FacebookException error) {
            Toast.makeText(FacebookFriendPickerActivity.this, error.getLocalizedMessage(), Toast.LENGTH_LONG).show();
            setResult(RESULT_CANCELED);
            finish();
        }
    });
    // Set the listener to handle button clicks
    friendPickerFragment.setOnDoneButtonClickedListener(new PickerFragment.OnDoneButtonClickedListener() {
        @Override
        public void onDoneButtonClicked(PickerFragment<?> fragment) {
            List<GraphUser> users = friendPickerFragment.getSelection();
            if (users.size() > 0) {
                ArrayList<String> usernames = new ArrayList<String>(users.size());
                for (GraphUser user : users)
                    usernames.add(user.getUsername());
                Intent data = new Intent();
                data.putStringArrayListExtra(IEXTRA_SELECTED_FRIENDS, usernames);
                setResult(RESULT_OK, data);
                finish();
            } else {
                setResult(RESULT_CANCELED);
                finish();
            }
        }
    });
    fragmentToShow = friendPickerFragment;
    manager.beginTransaction().replace(R.id.picker_fragment, fragmentToShow).commit();
}

@Override
protected void onStart() {
    super.onStart();
    friendPickerFragment.loadData(false);
}
}

当我尝试读取用户名列表时，我总是得到 null。

提前致谢。

Answer 1

当您使用 basic_info 权限(默认权限)查询好友列表时，您只会获得 id 和 name 字段。为了获得用户名字段，您必须将其作为额外字段添加到您的 friendPickerFragment。

只需添加这行代码即可完成

friendPickerFragment.setExtraFields(Arrays.asList("username"));

查看相关文档中的setExtraFields方法here