如何从Android应用程序中的Facebook sdk获取电子邮件ID？

Question

我在我的Android应用程序中集成了Facebook登录.我想获取登录用户的电子邮件ID.我怎么得到它？

private void loginToFacebook() {
    Session.openActiveSession(this, true, new Session.StatusCallback() {

        @Override
        public void call(Session session, SessionState state, Exception exception) {
            if (session.isOpened()) {
                Log.i(TAG, "Access Token" + session.getAccessToken());
                Request.executeMeRequestAsync(session, new Request.GraphUserCallback() {
                    @Override
                    public void onCompleted(GraphUser user, Response response) {
                        if (user != null) {
                            try {

                                 userID =user.getId();
                                 provider="facebook";
                                 userName=user.getUsername();
                                 firstName=user.getFirstName();
                                 lastName=user.getLastName();
                                 Log.d("****User****", "details:" + user);
                                 }catch(Exception e){

这是我的代码.我使用 Request.GraphUserCallback()方法,但此方法没有电子邮件的回复.

Answer 1

在调用之前Session.openActiveSession执行此操作以获取权限添加此:

List<String> permissions = new ArrayList<String>();
permissions.add("email");

Session.openActiveSession()应该是最后一个参数permissions.现在你可以访问了user.getProperty("email").toString().

编辑:

这是我正在进行Facebook授权的方式:

List<String> permissions = new ArrayList<String>();
permissions.add("email");

loginProgress.setVisibility(View.VISIBLE);

//start Facebook session
openActiveSession(this, true, new Session.StatusCallback() {
    @Override
    public void call(Session session, SessionState state, Exception exception) {
        if (session.isOpened()) {
            //make request to the /me API
            Log.e("sessionopened", "true");
            Request.executeMeRequestAsync(session, new Request.GraphUserCallback() {
                @Override
                public void onCompleted(GraphUser user, Response response) {
                    if (user != null) {
                        String firstName = user.getFirstName();
                        String lastName = user.getLastName();
                        String id = user.getId();
                        String email = user.getProperty("email").toString();

                        Log.e("facebookid", id);
                        Log.e("firstName", firstName);
                        Log.e("lastName", lastName);
                        Log.e("email", email);
                    }
                }
            });
         }
     }
 }, permissions);

将此方法添加到您的活动中:

private static Session openActiveSession(Activity activity, boolean allowLoginUI, Session.StatusCallback callback, List<String> permissions) {
    Session.OpenRequest openRequest = new Session.OpenRequest(activity).setPermissions(permissions).setCallback(callback);
    Session session = new Session.Builder(activity).build();
    if (SessionState.CREATED_TOKEN_LOADED.equals(session.getState()) || allowLoginUI) {
        Session.setActiveSession(session);
        session.openForRead(openRequest);
        return session;
    }
    return null;
}