如何获得与图请求在Facebook的Andr​​oid SDK中4.0登录用户的电子邮件地址 [英] How to get the logged user's email address with Graph Request in Facebook Android sdk 4.0

问题描述

我试图获取用户的电子邮件地址，一旦他登录到我的Andr​​oid应用程序与Facebook（SDK 4.0）。我看了很多帖子问同样的事情，但我还是不能使它发挥作用。我只需登录用户与code

I'm trying to get the user's email address once he's logged into my Android app with Facebook (sdk 4.0). I've read many posts asking the same thing but I still couldn't make it work. I simply log the user in with the code

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

然后，我让以

Then I make the Graph API request with

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"}

即使我删除了域的一部分，我得到一个JSON一堆的用户的公开信息，但从来没有在电子邮件领域。我对我自己的Facebook账户测试这一点，我有一个电子邮件地址与其关联。

Even if I remove the "fields" part, I get a JSON with a bunch of the user's public info, but never the email field. I'm testing this on my own Facebook account, and I do have an email address associated to it.

推荐答案

您可以按如下获取登录用户的电子邮件，但需要注意的是，

You can get the logged user email as follows , But note that ,

1. 他们不保证你会得到一个电子邮件地址<一个href="https://developers.facebook.com/docs/facebook-login/permissions/v2.3#reference-public_profile">read这里。

在某些情况下，虽然用户已经提供了电子邮件，它不会请求来通过，如果电子邮件是无效

In some cases, though user has provided an email, it will not come through request, if the email is not valid.

@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();

 }

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