Android Facebook SDK 4.X , how to get Email address and Facebook Access Token to pass it to Web Service

Question

EDIT : My Question is how to get Email , UserId , Facebook Authentication with Facebook SDK 4.X , at this moment , with Ming Respond , i know how can i get Email , User Id

Answer 1

I must add extra field for user Email.

    //register facebook login callback
    LoginManager.getInstance().registerCallback(mCallbackManager, new FacebookCallback()
    {
        @Override
        public void onSuccess (LoginResult loginResult)
        {
            Log.d(TAG, "FB: login success");
            showLoading(true);

            final String token = loginResult.getAccessToken().getToken();

            //prepare fields with email
            String[] requiredFields = new String[]{"email"};
            Bundle parameters = new Bundle();
            parameters.putString("fields", TextUtils.join(",", requiredFields));

            GraphRequest requestEmail = new GraphRequest(loginResult.getAccessToken(), "me", parameters, null, new GraphRequest.Callback()
            {
                @Override
                public void onCompleted (GraphResponse response)
                {
                    if (response != null)
                    {
                        GraphRequest.GraphJSONObjectCallback callbackEmail = new GraphRequest.GraphJSONObjectCallback()
                        {
                            @Override
                            public void onCompleted (JSONObject me, GraphResponse response)
                            {
                                if (response.getError() != null)
                                {
                                    Log.d(TAG, "FB: cannot parse email");
                                    showDialog(getString(R.string.dialog_message_unknown_error));
                                    showLoading(false);
                                }
                                else
                                {
                                    String email = me.optString("email");

                                    // send email and id to your web server
                                    //...
                                }
                            }
                        };

                        callbackEmail.onCompleted(response.getJSONObject(), response);
                    }
                }
            });

            requestEmail.executeAsync();
        }

        @Override
        public void onCancel ()
        {
            Log.d(TAG, "FB: login cancel");
            showDialog(getString(R.string.dialog_message_unknown_error));
        }

        @Override
        public void onError (FacebookException e)
        {
            Log.d(TAG, "FB: login error " + e.getMessage());
            showDialog(getString(R.string.dialog_message_unknown_error));
        }
    });