Facebook throws a JSONException when fetching email value

Question

I'm writing a Facebook Android app and one of the problems I'm encountering is getting users' email addresses. For all Facebook accounts except one, the email address is throwing an exception. Here's my code:

    loginButton = (LoginButton) findViewById(R.id.login_button);
    callbackManager = CallbackManager.Factory.create();

    loginButton.registerCallback(callbackManager,
            new FacebookCallback<LoginResult>() {
                @Override
                public void onSuccess(LoginResult loginResult) {
                    String accessToken = 
                    loginResult.getAccessToken().getToken();
                    Log.i("accessToken", accessToken);

                    GraphRequest request = GraphRequest.newMeRequest
                            (loginResult.getAccessToken(), new 
                             GraphRequest.GraphJSONObjectCallback()
                            {
                                @Override
                                public void onCompleted(JSONObject object, 
                                  GraphResponse response)
                                {
                                    SharedPreferences.Editor editor = 
                                      sharedPref.edit();
                                    try
                                    {

                                        editor.putString("user_ID", 
                                          object.getString("id"));
                                        user_ID = object.getString("id");
                                        editor.putString("user_name." + 
                                          user_ID, object.isNull("name") ? 
                                          "" : object.getString("name"));
                                        editor.putString("email_addr." + 
                                          user_ID, object.isNull("email") ? 
                                          "" : object.getString("email"));
                                        editor.commit();
                                    }
                                    catch (Exception e)
                                    {
                                        Toast.makeText(LaunchPage.this, getString(R.string.login_error) + e.getMessage(), Toast.LENGTH_LONG).show();
                                        e.printStackTrace();
                                    }

                                }
                            });
                    Bundle parameters = new Bundle();
                    parameters.putString("fields", "id, name, email, gender, birthday, timezone, picture, locale, age_range");
                    request.setParameters(parameters);
                    request.executeAsync();
                }

I've spent several days on this problem and I think I'm doing what was suggested in several other solutions posted, but my code still fails. I tried making my email address public in the failing Facebook accounts, but that didn't help.

Answer 1

It suddenly occurred to me that the one account whose email address is being returned is my own and that maybe it was connected with the fact that I'm the developer. So I checked my Facebook Developer Console and discovered a section, Roles, that lets you identify testers. So I added a couple of my test FB IDs and lo and behold, I was able to get their email addresses. Life is good again.

Answer 2

Try this code:

add setReadPermissions in your LoginButton

 loginButton = (LoginButton) findViewById(R.id.login_button);
 loginButton.setReadPermissions(Arrays.asList(
            "public_profile", "email", "user_birthday", "user_friends"));

Also make sure your Email is public in your Fb Account. Otherwise Graph api will not return it.