在使用SDK 4.0成功登录android后,我需要用户的电子邮件地址

Question

我已经集成了最新的Facebook android sdk 4.0.在SDK 3.0+中,用户的电子邮件地址在成功登录后使用user.getProperty("email")进行检索.我在Facebook Android sdk 4.0中寻找相应的命令参考链接:

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);
}

Answer 1

是的,它有效.唯一需要的是在FacebookCallBack的onSuccess方法中将GraphRequest更改为GraphRequestAsyncTask,然后可以从JSONObject轻松获取用户详细信息.

        @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();
        }

FBUser模型类

public class FBUser {
private String name;
private String email;

public FBUser(String displayName, String email) {
    this.name= displayName;
    this.email = email;
}

public FBUser() {

}

public String getName() {
    return displayName;
}

public void setName(String displayName) {
    this.displayName = displayName;
}


public String getEmail() {
    return email;
}

public void setEmail(String email) {
    this.email = email;
}

}

Answer 2

在新的Facebook图表中,您需要请求访问该信息的权限.例如,在您放置LoginButton的活动中,您将此行添加到OnCreate方法中

loginButtonFacebook.setReadPermissions(Arrays.asList("public_profile", "email", "user_birthday"));

然后你得到那些信息

loginButtonFacebook.registerCallback(callbackManager, new FacebookCallback<LoginResult>() {
@Override
public void onSuccess(LoginResult loginResult) {
    GraphRequest.newMeRequest(
        loginResult.getAccessToken(), new GraphRequest.GraphJSONObjectCallback() {
            @Override
            public void onCompleted(JSONObject me, GraphResponse response) {
                if (response.getError() != null) {
                    // handle error
                } else {
                    String email = me.optString("email");
                }
            }
        }).executeAsync();
}