二级列表

最新推荐文章于 2019-04-06 18:49:41 发布

都是神经病

最新推荐文章于 2019-04-06 18:49:41 发布

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CC 4.0 BY-SA版权

本文链接：https://blog.youkuaiyun.com/JLCBDXS/article/details/79500051

本文介绍了一种使用自定义适配器实现的二级列表视图展示方式，通过BaseExpandableListAdapter实现了列表项的展开与折叠功能，并展示了如何初始化并设置列表数据。

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//先获取到集合

List<ErJiLieBiao.DataBean> data = erJiLieBiao.getData();


mElist.setAdapter(new ErJiLieBiaoAdapter(getActivity(),data));

//默认打开
int count = mElist.getCount();
for (int i=0; i<count; i++)
{
    mElist.expandGroup(i);
};


//适配器
public class ErJiLieBiaoAdapter extends BaseExpandableListAdapter {
    Context context;
 /*   List<String> list1;
    List<List<ImgText>> list2;*/
    private List<ImgText> imgTexts;
    List<ErJiLieBiao.DataBean> data;

    public ErJiLieBiaoAdapter(Context context, List<ErJiLieBiao.DataBean> data) {
        this.context = context;

        this.data = data;
    }

    @Override
    public int getGroupCount() {
        return data.size();
    }

    @Override
    public int getChildrenCount(int i) {
        return 1;
    }

    @Override
    public Object getGroup(int i) {
        return data.get(i);
    }

    @Override
    public Object getChild(int i, int i1) {
        return data.get(i).getList().get(i1);
    }

    @Override
    public long getGroupId(int i) {
        return i;
    }

    @Override
    public long getChildId(int i, int i1) {
        return i1;
    }

    @Override
    public boolean hasStableIds() {
        return false;
    }

    @Override
    public View getGroupView(int groupPosition, boolean isExpanded,
                             View convertView, ViewGroup parent) {
        gViewHolder gHolder ;
        if (convertView== null) {
            convertView = View.inflate(context, R.layout.erjiliebaiitem1, null);

            gHolder = new gViewHolder();


            gHolder.group_text = (TextView) convertView.findViewById(R.id.text);
            //绑定
            convertView.setTag(gHolder);
        }else {
            gHolder = (gViewHolder) convertView.getTag();
        }
        gHolder.group_text.setText(data.get(groupPosition).getName());
        return convertView;
    }
    @Override
    public View getChildView(int groupPosition, int childPosition,boolean isLastChild, View convertView, ViewGroup parent) {
        convertView = View.inflate(context, R.layout.erjiliebaiitem2, null);

        RecyclerView recyclerView = (RecyclerView) convertView.findViewById(R.id.rlv);
            //绑定
        List<ErJiLieBiao.DataBean.ListBean> list = data.get(groupPosition).getList();

        recyclerView.setLayoutManager(new GridLayoutManager(context,3));
        MyAdaptera myAdaptera=new MyAdaptera(context,list);
        recyclerView.setAdapter(myAdaptera);
        return convertView;
    }

    @Override
    public boolean isChildSelectable(int i, int i1) {
        return true;
    }
    //组的优化
    public class gViewHolder{

        private TextView group_text;
    }
    //子条目的优化
    public class cViewHolder{
     private RecyclerView rlv;

    }

}