Facebook Share Dialog not Functioning

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Java

Mobile

Android

I have the following code for my Share Dialog inside the fragment:

TabFour.java

public class TabFour extends Fragment {
private UiLifecycleHelper uiHelper;
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.activity_tab_four, container, false);

    return rootView;
}

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    uiHelper = new UiLifecycleHelper(getActivity(), callback);
    uiHelper.onCreate(savedInstanceState);

    OpenGraphAction action = GraphObject.Factory.create(OpenGraphAction.class);
    action.setProperty("book", "https://example.com/book/Snow-Crash.html");

    @SuppressWarnings("deprecation")
    FacebookDialog shareDialog = new FacebookDialog.OpenGraphActionDialogBuilder(getActivity(), action, "books.reads", "book")
            .build();
    uiHelper.trackPendingDialogCall(shareDialog.present());
}


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

    uiHelper.onActivityResult(requestCode, resultCode, data, new FacebookDialog.Callback() {
        @Override
        public void onError(FacebookDialog.PendingCall pendingCall, Exception error, Bundle data) {
            Log.e("Activity", String.format("Error: %s", error.toString()));
        }

        @Override
        public void onComplete(FacebookDialog.PendingCall pendingCall, Bundle data) {
            Log.i("Activity", "Success!");
        }
    });
}



@Override
public void onResume() {
    super.onResume();
    uiHelper.onResume();
}

@Override
public void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    uiHelper.onSaveInstanceState(outState);
}

@Override
public void onPause() {
    super.onPause();
    uiHelper.onPause();
}

@Override
public void onDestroy() {
    super.onDestroy();
    uiHelper.onDestroy();
}
private Session.StatusCallback callback = new Session.StatusCallback() {


    @Override
    public void call(Session session, SessionState state,
            Exception exception) {
        // TODO Auto-generated method stub

    }
};
}

The Facebok Share loads on the emulator, however it does not on a phone. Also when the Share Dialog loads on the emulator, you can't share it because the share button on the upper left is disabled(visible but can't be clicked). Also, the emulator displays a toast message "Share Preview could not be fetched." Please help!

I hope someone can explain this to me. Thanks!