android 二级ListVew--ExpandableListView

首先进行模拟数据
List list = null;
Map

list = new ArrayList<String>();        list.add("A");        list.add("B");        list.add("C");        list.add("D");        map = new HashMap<String, List<String>>();        List<String> list1 = new ArrayList<String>();        list1.add("a");        list1.add("a");        list1.add("a");        list1.add("a");        map.put("A", list1);        List<String> list2 = new ArrayList<String>();        list2.add("b");        list2.add("b");        list2.add("b");        list2.add("b");        map.put("B", list2);        List<String> list3 = new ArrayList<String>();        list3.add("c");        list3.add("c");        list3.add("c");        list3.add("c");        map.put("C", list3);        List<String> list4 = new ArrayList<String>();        list4.add("d");        list4.add("d");        list4.add("d");        list4.add("d");        map.put("D", list4);

自定义适配器，这里继承BaseExpandableListAdapter

public class MyAdapter extends BaseExpandableListAdapter {    private List<String> list;    private Map<String, List<String>> map;    private Context context;    private LayoutInflater inflater;    public MyAdapter(Context context, List<String> list,            Map<String, List<String>> map) {        // TODO Auto-generated constructor stub        this.context = context;        this.inflater = inflater.from(context);        this.list = list;        this.map = map;    }    // 得到子item需要关联的数据，即父item    @Override    public Object getChild(int groupPosition, int childPosition) {        // TODO Auto-generated method stub        String key = list.get(groupPosition);        return map.get(key).get(childPosition);    }    // 得到子item的id    @Override    public long getChildId(int groupPosition, int childPosition) {        // TODO Auto-generated method stub        return childPosition;    }    // 设置子items的控件    @Override    public View getChildView(int groupPosition, int childPosition,            boolean islastChild, View converView, ViewGroup parent) {        // TODO Auto-generated method stub        String key = list.get(groupPosition);        String info = map.get(key).get(childPosition);        ViewHolder holder = new ViewHolder();        if (converView == null) {            converView = inflater.inflate(R.layout.items_sun, null, false);            holder.textView2 = (TextView) converView                    .findViewById(R.id.textView2);            converView.setTag(holder);        } else {            holder = (ViewHolder) converView.getTag();        }        holder.textView2.setText(info);        return converView;    }    // 获取父items下子items的个数    @Override    public int getChildrenCount(int groupPosition) {        // TODO Auto-generated method stub        String key = list.get(groupPosition);        return map.get(key).size();    }    // 获取父items的数据    @Override    public Object getGroup(int groupPosition) {        // TODO Auto-generated method stub        return list.get(groupPosition);    }    @Override    public int getGroupCount() {        // TODO Auto-generated method stub        return list.size();    }    @Override    public long getGroupId(int groupPosition) {        // TODO Auto-generated method stub        return groupPosition;    }    @Override    public View getGroupView(int groupPosition, boolean is, View converView,            ViewGroup parent) {        // TODO Auto-generated method stub        ViewHolder holder = new ViewHolder();        if (converView == null) {            converView = inflater.inflate(R.layout.items_parent, null, false);            holder.textView1 = (TextView) converView                    .findViewById(R.id.textView1);            converView.setTag(holder);        } else {            holder = (ViewHolder) converView.getTag();        }        holder.textView1.setText(list.get(groupPosition));        return converView;    }    @Override    public boolean hasStableIds() {        // TODO Auto-generated method stub        return true;    }    @Override    public boolean isChildSelectable(int groupPosition, int childPosition) {        // TODO Auto-generated method stub        return true;    }    class ViewHolder {        TextView textView1, textView2;    }}

这里我用了listView的优化处理，熟悉BaseAdapter的同学一定很熟悉，如果不熟悉的同学可以看一下我之前写的关于BaseAdapter的详解

地址：http://blog.csdn.net/wu996489865/article/details/46884317