Android 高仿QQ 好友分组列表

实现的效果如下：

用ExpandableListView实现，

先看Activity的代码：

public class BuddyAdapter extends BaseExpandableListAdapter {       private String[] group;     private String[][] buddy;    private Context context;    LayoutInflater inflater;        public BuddyAdapter(Context context,String[] group,String[][] buddy){    this.context=context;    inflater = LayoutInflater.from(context);    this.group=group;    this.buddy=buddy;    }public Object getChild(int groupPosition, int childPosition) {return buddy[groupPosition][childPosition];}public long getChildId(int groupPosition, int childPosition) {return childPosition;}public View getChildView(int groupPosition, int childPosition, boolean arg2, View convertView,ViewGroup arg4) {convertView = inflater.inflate(R.layout.buddy_listview_child_item, null);TextView nickTextView=(TextView) convertView.findViewById(R.id.buddy_listview_child_nick);nickTextView.setText(getChild(groupPosition, childPosition).toString());return convertView;}public int getChildrenCount(int groupPosition) {return buddy[groupPosition].length;}public Object getGroup(int groupPosition) {return group[groupPosition];}public int getGroupCount() {return group.length;}public long getGroupId(int groupPosition) {return groupPosition;}public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup arg3) {convertView = inflater.inflate(R.layout.buddy_listview_group_item, null);TextView groupNameTextView=(TextView) convertView.findViewById(R.id.buddy_listview_group_name);groupNameTextView.setText(getGroup(groupPosition).toString());ImageView image = (ImageView) convertView.findViewById(R.id.buddy_listview_image);image.setImageResource(R.drawable.group_unfold_arrow);//更换展开分组图片if(!isExpanded){image.setImageResource(R.drawable.group_fold_arrow);}return convertView;}public boolean hasStableIds() {return true;}// 子选项是否可以选择  public boolean isChildSelectable(int arg0, int arg1) {// TODO Auto-generated method stubreturn true;}}