Facebook login in Android fires callback before permissions popup

Question

When I'm using Facebook login in an Android app, the callback is called before the permissions popup is shown. In my code, the expected behaviour should be:

1. User opens app
2. User clicks "sign in" button
3. FB permissions dialog pops up
4. User accepts FB permissions
5. A "hi there!" toast message is shown

However, the actual flow is:

1. User opens app
2. User clicks "sign in" button
3. A "hi there!" toast message is shown
4. FB permissions dialog pops up

I basically used the code from this answer and added a button to perform the login when the user clicks on it, instead of on activity creation:

public class MainActivity extends Activity implements StatusCallback {
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
  }

  public void signIn(View view) {
    OpenRequest open = new OpenRequest(this);
    open.setLoginBehavior(SessionLoginBehavior.SUPPRESS_SSO);
    open.setPermissions(Arrays.asList(new String[] { "email", "user_hometown" }));
    open.setCallback(this);
    Session s = new Session(this);
    s.openForRead(open);
  }

  @Override
  public void call(Session session, SessionState state, Exception exception) {
    CharSequence text = "Hi there!";
    int duration = Toast.LENGTH_SHORT;
    Toast toast = Toast.makeText(getApplicationContext(), text, duration);
    toast.show();
  }

  @Override
  protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (Session.getActiveSession() != null)
      Session.getActiveSession().onActivityResult(this, requestCode,
          resultCode, data);
  }
}

Thanks

Answer 1

You have to check when comes correct SessionState value for you.

public void call(Session session, SessionState state, Exception exception) {
    if (state.isOpened()) {
        if (exception == null) {
            //Success
        } else if (state == SessionState.CLOSED_LOGIN_FAILED) {
            //Login fail
        } else if (state.isClosed()) {
            //Logged out...
        }
    }
}