CODEWITHSUNDEEP
androidfacebook-graph-apifacebook-android-sdk
francescop
francescop

Reputation: 72

Android - Facebook SDK get user name - Request.GraphUserCallback returns null

I want to display my Facebook name with this simple app that login after a button click that calls login().

The session is opened correctly, but the Request.GraphUserCallback does not work it seems that return null.

LogCat doesn't display any error when i launch my app, but i can't see my user.name() on the Toast that i showed on the onCompleted when the Graph API returns the user.

Here's my code without the imports and without the layout:

public class MainActivity extends Activity {

private Session.StatusCallback statusCallback;
private Request.GraphUserCallback requestGraphUserCallback;

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

    Toast.makeText(getApplicationContext(), "Ci siamo", Toast.LENGTH_SHORT).show();       

    statusCallback= new SessionStatusCallback();

    requestGraphUserCallback = new RequestGraphUserCallback();    

}


public void login(View view){


    Toast.makeText(getApplicationContext(), "Login", Toast.LENGTH_SHORT).show();

    // start Facebook Login
    Session.openActiveSession(this, true, statusCallback);

     Toast.makeText(getApplicationContext(), "finito login", Toast.LENGTH_SHORT).show();

}


//CLASSE SESSIONE
private class SessionStatusCallback implements Session.StatusCallback {

    @Override
    public void call(Session session, SessionState state, Exception exception) {

         if (session.isOpened()) {
          // make request to the /me API

             Request.newMeRequest(session, requestGraphUserCallback);
       }

    }
}


//CLASSE GRAPH

private class RequestGraphUserCallback implements Request.GraphUserCallback{

   // callback after Graph API response with user object
   @Override
   public void onCompleted(GraphUser user, Response response) {
       if (user != null) {
           Toast.makeText(getApplicationContext(), user.getName(), Toast.LENGTH_SHORT).show();
       }
     }
   }

}

What i'm doing wrong? Facebook documentation is very uncomprehensive. Already read this question and this tutorial (that use the contract version of my code).

Upvotes: 1

Views: 3813

Answers (1)

Mark Buikema
Mark Buikema

Reputation: 2540

You are not executing the request. In your SessionStatusCallback, after creating the request, you should call the executeAsync() method on it.

Upvotes: 6

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