@Override
    public boolean onCreateOptionsMenu(final Menu menu) {
        getMenuInflater().inflate(R.menu.menu_ok_cancel, menu);
        menu.findItem(R.id.menu_item_delete).setVisible(true);
        return true;
    }
Show a filter selection using an {@code ExpandableListView}.
main/src/main/java/cgeo/geocaching/filters/gui/GeocacheFilterActivity.java