Android请求电子邮件权限的Facebook SDK 3.7

我正在使用Facebook Android SDK来允许用户注册和使用应用程序。我想得到一些关于用户的基本信息，比如用户名和电子邮件。无论如何，我有问题，因为我得到空指针异常时，试图获取用户电子邮件

String email = user.getProperty("email").toString();

我假设我得到这个错误是因为我没有请求电子邮件许可。我怎么能做到

以下是完整的代码：

public class RegisterActivity extends ActionBarActivity{

Button btnFacebook;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_register);

    getSupportActionBar().hide();

    btnFacebook = (Button) findViewById(R.id.btn_facebook);


    btnFacebook.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {
            Log.d("FACEBOOK", "Prije sesije");
            // start Facebook Login
                        Session.openActiveSession(RegisterActivity.this, true, new Session.StatusCallback() {
                            // callback when session changes state
                            @SuppressWarnings("deprecation")
                            @Override
                            public void call(Session session, SessionState state,
                                    Exception exception) {
                                Log.d("FACEBOOK", "U call");
                                if(session.isOpened()){                     

                                    Log.d("FACEBOOK", "ako je sesija otvorena");

                                    // make request to the /me API
                                    Request.executeMeRequestAsync(session, new Request.GraphUserCallback() {

                                        @Override
                                        public void onCompleted(GraphUser user, Response response) {
                                            Log.d("FACEBOOK", "onCompleted");

                                            if(user != null){
                                                Log.d("FACEBOOK", "user razlicit od null");
                                                 String email = user.getProperty("email").toString();
                                                Toast.makeText(getApplicationContext(), "Ime "+user.getUsername().toString()+ "Email "+ email , 
                                                        Toast.LENGTH_SHORT).show();

                                                String userId = user.getId();


                                                //new DownloadImageTask(ivProfile).execute("http://graph.facebook.com/"+userId+"/picture?type=large");



                                                Log.d("ID", userId);



                                            }
                                            Log.d("ID", user.getId());


                                        }
                                    });
                                }
                                Log.d("FACEBOOK", "nije u sesisji");


                            }

                        });

        }
    });

}

 @Override
  public void onActivityResult(int requestCode, int resultCode, Intent data) {
      super.onActivityResult(requestCode, resultCode, data);
      Session.getActiveSession().onActivityResult(this, requestCode, resultCode, data);
  }

---

嘿，你可以这样试试

session.openForRead(new Session.OpenRequest(this).setPermissions(Arrays.asList("id", "name", "picture","installed" )).setCallback(statusCallback));

---

嘿，你可以这样试试

session.openForRead(new Session.OpenRequest(this).setPermissions(Arrays.asList("id", "name", "picture","installed" )).setCallback(statusCallback));

---

首先获取权限

private static final List<String> PERMISSIONS = Arrays.asList(
        "email","user_location");

    @Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    Log.d("Activity result","  "+requestCode+"   "+resultCode+"    "+data.toString());
    Session.getActiveSession().onActivityResult(this, requestCode,
            resultCode, data);
}

将互联网权限放入清单

   <uses-permission android:name="android.permission.INTERNET" />

在清单中声明Facebook登录活动

---

首先获取权限

private static final List<String> PERMISSIONS = Arrays.asList(
        "email","user_location");

    @Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    Log.d("Activity result","  "+requestCode+"   "+resultCode+"    "+data.toString());
    Session.getActiveSession().onActivityResult(this, requestCode,
            resultCode, data);
}

将互联网权限放入清单

   <uses-permission android:name="android.permission.INTERNET" />

在清单中声明Facebook登录活动

当我添加一个以上的权限（生日）如下时，它不起作用。多次加载RegisterActivity.private static final List PERMISSIONS=Arrays.asList（“电子邮件”、“用户位置”、“生日”）；嗨，我也面临同样的问题。你的回答很好，但facebook首先要求获得基本权限，如果我接受了，弹出窗口会再次打开并要求获得邮件权限。你知道我怎么能只有一个弹出窗口来请求邮件权限吗？thx:）@Maxime no您不能，使用Facebook 3.0登录时，您不能请求超过默认提供的public_profile权限。此解决方案是完美的，当我添加一个权限（生日）时，如下所示，它不起作用。多次加载RegisterActivity.private static final List PERMISSIONS=Arrays.asList（“电子邮件”、“用户位置”、“生日”）；嗨，我也面临同样的问题。你的回答很好，但facebook首先要求获得基本权限，如果我接受了，弹出窗口会再次打开并要求获得邮件权限。你知道我怎么能只有一个弹出窗口来请求邮件权限吗？thx:）@Maxime no您不能，使用Facebook 3.0登录时，您不能请求超过默认提供的public_profile权限。此解决方案非常完美