How to get FB User ID using Facebook Login Button in android application

问题

I'm developing an application in which I'm using Facebook log in button from SDK. I'm able to get access_token of the user but I want userID too. I have tried almost everything but was not successful. I have used facebook tutorial for achieving that. Here is the link: Facebook Login Button

Please help me in getting userID from the same login button.

Any kind of help will be appreciated.

回答1:

After successful login, you need to call following code. You can get the logged-in user details with id in response.

Session session = Session.getActiveSession();
Request request = Request.newGraphPathRequest(session, "me", null);
com.facebook.Response response = Request.executeAndWait(request)

回答2:

Use the getId method of FB Profile class( Facebook SDK 4.0).

  Profile profile = Profile.getCurrentProfile();
  System.out.println(profile.getFirstName());
  System.out.println(profile.getId());

回答3:

loginResult.getAccessToken().getUserId()

回答4:

You should be used new facebook sdk 3.0 and

@Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        Session.getActiveSession().onActivityResult(this, requestCode, resultCode, data);
        if (Session.getActiveSession().isOpened()) {
            // Request user data and show the results
            Request.executeMeRequestAsync(Session.getActiveSession(), new Request.GraphUserCallback() {

                @Override
                public void onCompleted(GraphUser user, Response response) {
                    // TODO Auto-generated method stub
                    if (user != null) {
                        // Display the parsed user info
                        Log.v(TAG, "Response : " + response);
                        Log.v(TAG, "UserID : " + user.getId());
                        Log.v(TAG, "User FirstName : " + user.getFirstName());

                    }
                }

            });
        }
    }

回答5:

Based on answer from @Ketan Mehta (https://stackoverflow.com/a/17397931/624109) that uses a deprecated API, you should use the following code:

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

    Session.getActiveSession().onActivityResult(this, requestCode, resultCode, data);

    if (Session.getActiveSession().isOpened())
    {
        // Request user data and show the results
        Request.newMeRequest(Session.getActiveSession(), new GraphUserCallback()
        {
            @Override
            public void onCompleted(GraphUser user, Response response)
            {
                if (null != user)
                {
                    // Display the parsed user info
                    Log.v(TAG, "Response : " + response);
                    Log.v(TAG, "UserID : " + user.getId());
                    Log.v(TAG, "User FirstName : " + user.getFirstName());

                }
            }
        }).executeAsync();
    }
}

回答6:

As these all answers are for older SDK , for SDK 4.0 here is the code

loginButton.registerCallback(callbackManager, new    FacebookCallback<LoginResult>() {
        @Override
        public void onSuccess(LoginResult loginResult) {
            // App code
            Profile profile = Profile.getCurrentProfile();

            Log.d("facebook",profile.getId());
        }

        @Override
        public void onCancel() {
            // App code
            Log.d("facebook","failed");
        }

        @Override
        public void onError(FacebookException exception) {
            // App code
            Log.d("facebook","failed");
        }
    });

i was searching for the same thing looks like the Session object is no more accessible so above is the new way to get user profile and user id.

回答7:

The Facebook graph API lets you make calls that return JSON, which you can parse in Android with a JSONObject like this below code.

JSONObject me = new JSONObject(fb.request("me"));
String id = me.getString("id");

回答8:

You can get the user ID with this code :

document.getElementById('status').innerHTML =
   'Welcome ' + response.name + '!' + "<br />"+
   'Your user ID is : ' + response.id;

来源：https://stackoverflow.com/questions/15568159/how-to-get-fb-user-id-using-facebook-login-button-in-android-application