如何使用Facebook Android sdk 4.0中的图形请求获取记录用户的电子邮件地址

Question

我试图通过Facebook(sdk 4.0)登录我的Android应用程序后获取用户的电子邮件地址.我读过很多帖子都在问同样的事情,但我仍然无法让它发挥作用.我只需使用代码登录用户

LoginManager.getInstance().logInWithReadPermissions(this, Arrays.asList("public_profile", "user_friends", "email"));

然后我用.做了Graph API请求

LoginManager.getInstance().registerCallback(fbCallbackManager,
            new FacebookCallback<LoginResult>() {
                @Override
                public void onSuccess(LoginResult loginResult) {
                    System.out.println(loginResult.getAccessToken().toString());

                    GraphRequest request = GraphRequest.newMeRequest(
                            loginResult.getAccessToken(),
                            new GraphRequest.GraphJSONObjectCallback() {
                                @Override
                                public void onCompleted(
                                        JSONObject object,
                                        GraphResponse response) {
                                    System.out.println(object.toString());

                                }
                            });
                    Bundle parameters = new Bundle();
                    parameters.putString("fields", "email");
                    request.setParameters(parameters);
                    request.executeAsync();
                }

                @Override
                public void onCancel() {
                    // App code
                }

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

输出就是

{AccessToken token:ACCESS_TOKEN_REMOVED permissions:[public_profile, contact_email, user_friends, email, basic_info]}
{"id":"xxxxxxxxxxxxxxx"}

即使我删除了"fields"部分,我也会获得一个带有一堆用户公共信息的JSON,但从未收到电子邮件字段.我正在我自己的Facebook帐户上测试这个,我确实有一个与之关联的电子邮件地址.

Answer 1

您可以按如下方式获取已登录的用户电子邮件,但请注意,

1. 他们不保证您会在此处阅读电子邮件地址.

2. 在某些情况下,虽然用户提供了电子邮件,但如果电子邮件无效,则不会通过请求进行.

   @Override
   public void onSuccess(LoginResult loginResult) {
   
   
   GraphRequest request = GraphRequest.newMeRequest( AccessToken.getCurrentAccessToken(),
           new GraphRequest.GraphJSONObjectCallback() {
               @Override
               public void onCompleted(JSONObject object,GraphResponse response) {
               try {
                   String  email=object.getString("email");
                   Log.d(TAG + "user email ", email);
                   } catch (JSONException e) {
                       // TODO Auto-generated catch block
                       e.printStackTrace();
                   }
   
               }
   
               });
   
               request.executeAsync();                        
    }
   

Answer 2

这是完整的代码,通过它我可以从facebook获得我们需要的所有数据

 login_facebook_button = (LoginButton) findViewById(R.id.login_facebook_button);
    login_facebook_button.setReadPermissions(Arrays.asList("public_profile", "user_friends", "email", "user_birthday"));
    //LoginManager.getInstance().logInWithReadPermissions(this, Arrays.asList("public_profile", "user_friends"));
    // Callback registration
    login_facebook_button.registerCallback(callbackManager, new FacebookCallback<LoginResult>() {
        @Override
        public void onSuccess(LoginResult loginResult) {
            // App code
            Log.e("onSuccess", "--------" + loginResult.getAccessToken());
            Log.e("Token", "--------" + loginResult.getAccessToken().getToken());
            Log.e("Permision", "--------" + loginResult.getRecentlyGrantedPermissions());
            Profile profile = Profile.getCurrentProfile();
            Log.e("ProfileDataNameF", "--" + profile.getFirstName());
            Log.e("ProfileDataNameL", "--" + profile.getLastName());

            Log.e("Image URI", "--" + profile.getLinkUri());

            Log.e("OnGraph", "------------------------");
            GraphRequest request = GraphRequest.newMeRequest(
                    loginResult.getAccessToken(),
                    new GraphRequest.GraphJSONObjectCallback() {
                        @Override
                        public void onCompleted(
                                JSONObject object,
                                GraphResponse response) {
                            // Application code
                            Log.e("GraphResponse", "-------------" + response.toString());
                        }
                    });
            Bundle parameters = new Bundle();
            parameters.putString("fields", "id,name,link,gender,birthday,email");
            request.setParameters(parameters);
            request.executeAsync();

        }

        @Override
        public void onCancel() {
            // App code
        }

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

并且日志中的呼叫响应是:

{Response:  responseCode: 200, graphObject: {"id":"896337040431723","name":"Aneh Thakur","link":"https:\/\/www.facebook.com\/app_scoped_user_id\/896337040431723\/","gender":"male","birthday":"08\/05\/1992","email":"anehkumar@gmail.com"}, error: null}

希望这会帮助你.

• TrinityTuts