Android : Im trying to send invite to use my android application but invite notification is not shown on facebook app and mobile browser

this is the code to invite friends on the facebook to use my app.Thanx in advance.Please help me. I configure developer console also but dont know where Im stuck. notification only show in computer browser.

  private void showDialogWithoutNotificationBar(String action, Bundle params) {
        // Create the dialog
            dialog = new WebDialog.Builder(getActivity(),
    Session.getActiveSession(), action, params)
                .setOnCompleteListener(new WebDialog.OnCompleteListener() {

                @Override
                    public void onComplete(Bundle values,
                            FacebookException error) {

                    if (error != null) {
                            if (error instanceof FacebookOperationCanceledException) {
                                Toast.makeText(
                                        getActivity().getApplicationContext(),
                                        error.getMessage(), Toast.LENGTH_SHORT)
                                    .show();
                        } else {
                                Toast.makeText(
                                        getActivity().getApplicationContext(),
                                       error.getMessage(), Toast.LENGTH_SHORT)
                                    .show();
                        }
                    } else {
                            String requestId = values.getString("request");

                            // DatabaseActivity.insert(requestId);

                            if (requestId != null) {
                                Toast.makeText(
                                        getActivity().getApplicationContext(),
                                    "Request Send", Toast.LENGTH_SHORT)
                                    .show();
                        } else {
                                Toast.makeText(
                                        getActivity().getApplicationContext(),
                                    "Request cancelled", Toast.LENGTH_SHORT)
                                    .show();

                        }

                            dialog = null;
                            dialogAction = null;
                            dialogParams = null;
                    }
                }
                }).build();

    // Hide the notification bar and resize to full screen
        Window dialog_window = dialog.getWindow();
        dialog_window.setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);

    // Store the dialog information in attributes
        dialogAction = action;
        dialogParams = params;

        // Show the dialog
        dialog.show();
}

    private void sendDirectedInvite() {
        Bundle params = new Bundle();
        params.putString("message", "Come join me in the friend smash times!");

        showDialogWithoutNotificationBar("apprequests", params);
}