protected void checkIntentHideNavigationBar(final boolean defaultValue) {
        final Intent intent = getIntent();
        hideNavigationBar = (intent != null && intent.hasExtra(BUNDLE_HIDENAVIGATIONBAR)) ? intent.getBooleanExtra(BUNDLE_HIDENAVIGATIONBAR, defaultValue) : defaultValue;
    }
@return the menu item id which should be selected
main/src/main/java/cgeo/geocaching/activity/AbstractNavigationBarActivity.java