Android:导航抽屉子菜单:如何折叠导航项 [英] Android: Navigation Drawer SubMenu: How to Collapsible navigation items

问题描述

我有一个带有 10 个选项的导航抽屉选项 #5 应该有另外 7 个选项(如子菜单)，可以展开/折叠

如何创建一个可折叠导航项"，就像它描述的那样

I have a Navigation Drawer with 10 options Option #5 shoudl have another 7 options (like a sub menu) of some sort that is expandable/collapsible

How do I create a "Collapsible navigation items" like it is described here?

解决方案

Here is a sample application which makes it:

PrashamTrivedi / DrawerLayoutTest: Link is dead

EDIT: Simple Navigational Drawer Layout in Android

@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;
}

And you have to create the new xml files in the layout folder (hint: create two, one for the group view and other for the submenu)

After all your side navigation must look like as below:

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