我已经将最新的Facebook的Andr​​oid SDK中4.0。在SDK 3.0+用户的电子邮件地址是用成功登录后user.getProperty（电子邮件）retreived。我要寻找一个在Facebook的Andr​​oid SDK中4.0对应的命令 相关链接：

https://developers.facebook.com/docs/facebook-login/android/v2.3#overview https://developers.facebook.com/docs/android/upgrading-4.x

  @覆盖
公共无效的onCreate（包savedInstanceState）{
    super.onCreate（savedInstanceState）;
    FacebookSdk.sdkInitialize（getActivity（）getApplicationContext（））;
    callbackManager = CallbackManager.Factory.create（）;
}

@覆盖
公共无效onViewCreated（查看视图，@Nullable捆绑savedInstanceState）{
    super.onViewCreated（查看，savedInstanceState）;
    loginButton =（LoginButton）view.findViewById（R.id.login_button）;
    loginButton.setReadPermissions（电子邮件，user_likes，user_friends）;
    loginButton.setFragment（本）;
    setFacebookLoginText（loginButton）;
    //其他应用程序特定的专业化

    //回调注册
    loginButton.registerCallback（callbackManager，新FacebookCallback＆LT; LoginResult＆GT;（）{
        @覆盖
        公共无效的onSuccess（LoginResult loginResult）{
            AccessToken accessToken = loginResult.getAccessToken（）;
            GraphRequest请求= GraphRequest.newMeRequest（accessToken，新GraphRequest.GraphJSONObjectCallback（）{
                @覆盖
                公共无效onCompleted（JSONObject的用户，GraphResponse graphResponse）{

                  //登录成功后，需要用户的电子邮件地址。

                }
            }）executeAsync（）。
        }

        @覆盖
        公共无效OnCancel的（）{
            Toast.makeText（getActivity（），不合格，Toast.LENGTH_SHORT）.show（）;
        }

        @覆盖
        公共无效onerror的（FacebookException除外）{
            Toast.makeText（getActivity（），错误，Toast.LENGTH_SHORT）.show（）;
        }
    }）;

}

@覆盖
公共查看onCreateView（LayoutInflater充气，容器的ViewGroup，捆绑savedInstanceState）{
    查看查看= inflater.inflate（R.layout.fragment_facebook_login，集装箱，假）;
    返回查看;
}


@覆盖
公共无效onActivityResult（INT申请code，INT结果code，意图数据）{
    super.onActivityResult（要求code，因此code，数据）;
    callbackManager.onActivityResult（要求code，因此code，数据）;
}
 

解决方案

是啊，它的工作。唯一需要的东西是GraphRequest改变GraphRequestAsyncTask在FacebookCallBack中的onSuccess方法，然后用户详细信息可以很容易地从JSONObject的进账。

  @覆盖
        公共无效的onSuccess（LoginResult loginResult）{
            最终AccessToken accessToken = loginResult.getAccessToken（）;
            最后FBUser fbUser =新FBUser（）;
            GraphRequestAsyncTask请求= GraphRequest.newMeRequest（accessToken，新GraphRequest.GraphJSONObjectCallback（）{
                @覆盖
                公共无效onCompleted（JSONObject的用户，GraphResponse graphResponse）{
                    fbUser.setEmail（user.optString（电子邮件））;
                    fbUser.setName（user.optString（名字））;
                    fbUser.setId（user.optString（ID））;
                }
            }）executeAsync（）。
        }
 

I have integrated latest Facebook android sdk 4.0. In SDK 3.0+ user's email address is retreived using user.getProperty("email") after successful login. I am looking for corresponding command in Facebook Android sdk 4.0 Reference Links:

https://developers.facebook.com/docs/facebook-login/android/v2.3#overview https://developers.facebook.com/docs/android/upgrading-4.x

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    FacebookSdk.sdkInitialize(getActivity().getApplicationContext());
    callbackManager = CallbackManager.Factory.create();
}

@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);
    loginButton = (LoginButton) view.findViewById(R.id.login_button);
    loginButton.setReadPermissions("email", "user_likes", "user_friends");
    loginButton.setFragment(this);
    setFacebookLoginText(loginButton);
    // Other app specific specialization

    // Callback registration
    loginButton.registerCallback(callbackManager, new FacebookCallback<LoginResult>() {
        @Override
        public void onSuccess(LoginResult loginResult) {
            AccessToken accessToken = loginResult.getAccessToken();
            GraphRequest request = GraphRequest.newMeRequest(accessToken, new GraphRequest.GraphJSONObjectCallback() {
                @Override
                public void onCompleted(JSONObject user, GraphResponse graphResponse) {

                  //Need User email address after login success.

                }
            }).executeAsync();
        }

        @Override
        public void onCancel() {
            Toast.makeText(getActivity(), "fail", Toast.LENGTH_SHORT).show();
        }

        @Override
        public void onError(FacebookException exception) {
            Toast.makeText(getActivity(), "error", Toast.LENGTH_SHORT).show();
        }
    });

}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_facebook_login, container, false);
    return view;
}


@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    callbackManager.onActivityResult(requestCode, resultCode, data);
}

Yeah it worked. Only thing required was to change GraphRequest to GraphRequestAsyncTask in onSuccess method of FacebookCallBack, and then user details could easily be fetched from the JSONObject.

        @Override
        public void onSuccess(LoginResult loginResult) {
            final AccessToken accessToken = loginResult.getAccessToken();
            final FBUser fbUser = new FBUser();
            GraphRequestAsyncTask request = GraphRequest.newMeRequest(accessToken, new GraphRequest.GraphJSONObjectCallback() {
                @Override
                public void onCompleted(JSONObject user, GraphResponse graphResponse) {
                    fbUser.setEmail(user.optString("email"));
                    fbUser.setName(user.optString("name"));
                    fbUser.setId(user.optString("id"));
                }
            }).executeAsync();
        }