@Override
                      public void onClick(DialogInterface dialog, int whichButton) {
                        saveSecretAndRefreshUserList(
                            saveKeyDialogParams.index,
                            saveKeyDialogParams.secret,
                            saveKeyDialogParams.type,
                            saveKeyDialogParams.counter);
                      }
Prompt to download Google Play Services from Google Play.
java/com/google/android/apps/authenticator/AuthenticatorActivity.java