Facebook API Question posted in
The official documentation for the Facebook APIs can be found here.

How to fetch email from Facebook API, when user used their mobile no. for login?

Iam using facebook login for android app. I Am getting email and other details using Facebook API. I have following questions:

1) How to fetch email from Facebook API, when user used their mobile no. for login.

2) How we know that the user logged in with mobile number or email in Facebook login API in android?

Please Guide.

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2

Answers


  1. 0

    If the user logged in with his mobile phone, you will not get an email. You can present an input field and ask the user for his email right after login.

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  2. 0

    You can get the user email id which user has used in facebook by:-

    loginButton.setReadPermissions("email");

loginButton.registerCallback(callbackManager, new FacebookCallback<LoginResult>() {
        @Override
        public void onSuccess(LoginResult loginResult) {
            // App code
            GraphRequest request = GraphRequest.newMeRequest(
                    loginResult.getAccessToken(),
                    new GraphRequest.GraphJSONObjectCallback() {
                        @Override
                        public void onCompleted(JSONObject object, GraphResponse response) {
                            Log.v("LoginActivity", response.toString());

                            // Application code
                            String email = object.getString("email");

                        }
                    });

    You can redirect to another activity by:-

    private FacebookCallback<LoginResult> callback = new FacebookCallback<LoginResult>() {
        @Override
        public void onSuccess(LoginResult loginResult) {
            //call your activity here
        }

        @Override
        public void onCancel() {

        }

        @Override
        public void onError(FacebookException e) {
            Log.d("Exception",e.getMessage());

        }
    };
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