Android：导航抽屉SubMenu：如何折叠导航项目

Question

我有一个带有10个选项的导航抽屉 选项＃5 shoudl有另外7种可扩展/可折叠的选项（如子菜单）

如何创建“可折叠导航项”，如here所述？

Answer 1

以下是一个示例应用程序：

  

PrashamTrivedi / DrawerLayoutTest

@Override
    public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent)
    {
        if (convertView == null)
        {
            LayoutInflater layoutInflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = layoutInflater.inflate(R.layout.drawer_group_item,parent,false);
        }

        ((TextView) convertView).setText(groupItem.get(groupPosition));
        convertView.setTag(groupItem.get(groupPosition));
        return convertView;
    }

---

@Override
    public View getChildView(int groupPosition, final int childPosition, boolean isLastChild, View convertView, ViewGroup parent)
    {
        tempChild = (ArrayList<String>) children.get(groupPosition);
        TextView text = null;

        if (convertView == null)
        {
            LayoutInflater layoutInflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = layoutInflater.inflate(R.layout.drawer_submenu_item,parent,false);
        }

        text = (TextView) convertView;
        text.setText(tempChild.get(childPosition));

        convertView.setTag(tempChild.get(childPosition));
        return convertView;
}

您必须在布局文件夹中创建新的xml文件（提示：创建两个，一个用于组视图，另一个用于子菜单）

毕竟您的侧面导航必须如下所示：

  

编辑：Simple Navigational Drawer Layout in Android