Android Listview 实现Ios UItableView的分组模块功能 基础Adapter

改基类指在 更快捷的实现 ListView的分组功能

设计思想：
section：切片，分段
row ： 列
每个 section包含了 一个 Header 、n个Row 、一个Footer

getCount的方法在基础类进行了final（不能重写），开发使用时不再关心 count

    @Override    final public int getCount() {        int section = getSection();        int count = 0;        for (int i = 0; i < section; i++) {            int header = isGroupHeaderForSection(i)?1:0;            int footer = isGroupFooterForSection(i)?1:0;            count = count + getRow(i) + header + footer;        }        return count;    }

public abstract class ListGroupAdapter extends BaseAdapter {    public Context mContext;    public int getSection(){//获取切片        return 1;    }    /**     * 根据切片section 获取对应的 row item     * @param section     * @return     */    public abstract int getRow(int section);    @Override    final public int getCount() {        int section = getSection();        int count = 0;        for (int i = 0; i < section; i++) {            int header = isGroupHeaderForSection(i)?1:0;            int footer = isGroupFooterForSection(i)?1:0;            count = count + getRow(i) + header + footer;        }        return count;    }    @Override    final public int getItemViewType(int position) {         IndexPath indexPath = findIndexPathForPosition(position);         if (isGroupHeaderForSection(indexPath.section) && indexPath.row == 0 ) {//有头             return getItemHeaderViewType(indexPath);         }         if (isGroupFooterForSection(indexPath.section)) {//有尾             int row = getRow(indexPath.section);             int header = isGroupHeaderForSection(indexPath.section)?1:0;             if (row == indexPath.row - header) {//到尾部了                return getItemFooterViewType(indexPath);            }         }         return getItemViewType(indexPath);    }    /**     * 获取 view type的总数     */    @Override    public int getViewTypeCount() {        return 3;    }    /**     *      * @param indexPath 改位置的 view type     * @return     */    public int getItemViewType(IndexPath indexPath){        return 0;    }    /**     *      * @param indexPath section Footer 位置的 view type     * @return     */    public int getItemFooterViewType(IndexPath indexPath){        return 1;    }    /**     *      * @param indexPath  section Header position view type     * @return     */    public int getItemHeaderViewType(IndexPath indexPath){        return 2;    }    /**     * 根据 postion 计算 indexPath     * @param position     * @return     */    final public IndexPath findIndexPathForPosition(int position){        position -= getListHeadCount();        int section = getSection();        int count = 0;        int sec = 0;        for (int i = 0; i < section; i++) {            int header = isGroupHeaderForSection(i)?1:0;            int footer = isGroupFooterForSection(i)?1:0;            count = count + getRow(i) + header + footer;            if (count > position) {                sec = i;                count = count - getRow(i) - header - footer;                break;            }        }        IndexPath indexPath = new IndexPath();        indexPath.section = sec;        indexPath.row = position-count;        Log.d("demo", "" +indexPath +" po: "+ position +" getRow:"+getRow(indexPath.section));        return indexPath;    }    /**     * listview  header 的数量决定 position 的位置     * @return     */    public int getListHeadCount(){        return 0;    }    /**     * 次getview 不能被重写      */    @Override    final public View getView(int position, View convertView, ViewGroup parent) {         IndexPath indexPath = findIndexPathForPosition(position);         int header = isGroupHeaderForSection(indexPath.section)?1:0;         if (isGroupHeaderForSection(indexPath.section) && indexPath.row == 0) {//有头             return getHeaderView(position, indexPath.section, convertView, parent);         }         if (isGroupFooterForSection(indexPath.section)) {//有尾             int row = getRow(indexPath.section);             if (row == indexPath.row - header) {//到尾部了                return getFooterView(position, indexPath.section, convertView, parent);            }         }         if (isGroupHeaderForSection(indexPath.section)) {//包含header row位置 -1 和 list index 保持一致             indexPath.row -= 1;         }         //内容item         return getView(position, indexPath, convertView, parent);    }    /**     * 该组是否包含HeadView     * @param section     * @return     */    public boolean isGroupHeaderForSection(int section){        return false;    }    /**     * 该组是否包含FooterVew     * @param section     * @return     */    public boolean isGroupFooterForSection(int section){        return false;    }    /**     * body item的 view      * @param position     * @param indexPath     * @param convertView     * @param parent     * @return     */    public abstract View getView(int position,IndexPath indexPath,View convertView,ViewGroup parent);    public View getHeaderView(int position,int section,View convertView,ViewGroup parent){        if (isGroupHeaderForSection(section)) {            TextView header = null;            if (convertView!=null) {                header =(TextView) convertView;            }else {                header = new TextView(mContext);            }            header.setText("第:"+section+" header");            return header;        }        return null;    }    public View getFooterView(int position,int section,View convertView,ViewGroup parent){        if (isGroupFooterForSection(section)) {            TextView footer =null;            if (convertView != null) {                footer = (TextView) convertView;            }else {                footer = new TextView(mContext);                }            footer.setText("第:"+section +" footer");            return footer;        }        return null;    }    public static class IndexPath{        public int row;        public int section;        @Override        public String toString() {            return "IndexPath [row=" + row + ", section=" + section + "]";        }    }}

使用Demo 案例：

public class DemoAdapter  extends ListGroupAdapter implements OnClickListener{    public List<OrderBean> orderBeans;    LayoutInflater mInflater;    public DemoAdapter( List<OrderBean> orderBeans, Context context ){        mContext = context;        mInflater = LayoutInflater.from(context);        this.orderBeans = orderBeans;    }    @Override    public Object getItem(int position) {        return null;    }    @Override    public long getItemId(int position) {        // TODO Auto-generated method stub        return 0;    }    @Override    public int getSection() {        return orderBeans.size();    }    @Override    public int getRow(int section) {        OrderBean bean = orderBeans.get(section);        if (bean.isShowAll) {            return bean.goodsBeans.size();        }else {            return bean.goodsBeans.size()>2?2:bean.goodsBeans.size();        }    }    @Override    public View getView(int position, IndexPath indexPath, View convertView,            ViewGroup parent) {        View view = null;        if (convertView!=null) {            view = convertView;        }else{            view = mInflater.inflate(R.layout.goods_item_layout, null);        }        TextView goodsView = (TextView) view.findViewById(R.id.goods_name);        goodsView.setText(orderBeans.get(indexPath.section).goodsBeans.get(indexPath.row).goodsName);        return view;    }    @Override    public boolean isGroupHeaderForSection(int section) {//      if (section%2==0) {//          return false;//      }        return true;    }    @Override    public boolean isGroupFooterForSection(int section) {        if (orderBeans.get(section).goodsBeans.size()<=2) {            return false ;        }        return true;    }    @Override    public View getFooterView(int position, int section, View conView,            ViewGroup parent) {        View view = null;        if (conView!=null) {            view = conView ;        }else{            view = mInflater.inflate(R.layout.footer_item_layout, null);        }        Button button = (Button) view.findViewById(R.id.button1);        button.setTag(section);        OrderBean bean = orderBeans.get(section);        if (bean.isShowAll) {            button.setText("关闭 - " + bean.goodsBeans.size());           }else {            button.setText("打开 - "+bean.goodsBeans.size());        }        button.setOnClickListener(this);        return view;    }    @Override    public void onClick(View v) {        switch (v.getId()) {        case R.id.button1:            int section = (Integer) v.getTag();            OrderBean bean = orderBeans.get(section);            bean.isShowAll = !bean.isShowAll;            notifyDataSetChanged();            break;        default:            break;        }    }}