关于ExpandableListAdapter的一个比较二的问题，求指导啊

package com.dailyreport.main;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.List;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.ExpandableListActivity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.widget.AbsListView;
import android.widget.BaseExpandableListAdapter;
import android.widget.TextView;
import com.example.dailyreport.R;
public class Organization extends ExpandableListActivity {

	List<String> group; // 组列表
	List<List<String>> child; // 子列表
	ContactsInfoAdapter adapter; // 数据适配器
	/**
	 * 初始化组、子列表数据
	 */
	private void initializeData() {
		group = new ArrayList<String>();
		child = new ArrayList<List<String>>();
		addInfo("Andy", new String[] { "male", "138123***", "GuangZhou" });
		addInfo("Fairy", new String[] { "female", "138123***", "GuangZhou" });
		addInfo("Jerry", new String[] { "male", "138123***", "ShenZhen" });
		addInfo("Tom", new String[] { "female", "138123***", "ShangHai" });
		addInfo("Bill", new String[] { "male", "138231***", "ZhanJiang" });
	}

//handle取网络线程的数据
	protected static final int SET_ORGANIZATION = 1;
	private Handler myhandler = new Handler() {
		public void handleMessage(android.os.Message msg) {
			if (msg.what == SET_ORGANIZATION) {
				String depart_json_array = (String) msg.obj;
				JSONArray depart_json_arr = null;
				try {
					depart_json_arr = new JSONArray(depart_json_array);
				} catch (JSONException e1) {
					// TODO 自动生成的 catch 块
					e1.printStackTrace();
				}
				try {
					JSONObject depart_info = (JSONObject) depart_json_arr
							.get(0);
					String depart_info_s = depart_info.get(
							"contact_depart_json").toString();
					String[] armtypes = depart_info_s.split(",");
					JSONObject departdetail_info = (JSONObject) depart_json_arr
							.get(1);
					String contact_departdetail_s = departdetail_info.get(
							"contact_departdetail_json").toString();
					String[] departdetail_arr = contact_departdetail_s
							.split("#");

					initializeData();
					for (int i = 0; i < armtypes.length; i++) {
						 String[] arrarr = new String[]{};
						 arrarr = departdetail_arr[i].split(",");
						 addInfo(armtypes[i], arrarr);
						 
						 System.out.println(armtypes[i]);//检查数组！
						 for (int j = 0; j < arrarr.length; j++) {
							 System.out.println(arrarr[j]); // 检查二维数组！
							 }
					}
//					 addInfo(armtypes[0], departdetail_arr[0].split(","));

//					addInfo("Andy", new String[] { "male", "138123***", "GuangZhou" });
//					addInfo("Fairy", new String[] { "female", "138123***", "GuangZhou" });
//					addInfo("Jerry", new String[] { "male", "138123***", "ShenZhen" });
//					addInfo("Tom", new String[] { "female", "138123***", "ShangHai" });
//					addInfo("Bill", new String[] { "male", "138231***", "ZhanJiang" });
					 
				} catch (JSONException e) {
					// TODO 自动生成的 catch 块
					e.printStackTrace();
				}

				Log.v("depart_json_array", depart_json_array);
			}
		};
	};
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		requestWindowFeature(Window.FEATURE_NO_TITLE); // 设置为无标题
		setContentView(R.layout.organization);
		getExpandableListView().setBackgroundResource(
				R.drawable.contact_background);

		new URLConnectionThread().start();

		initializeData();

		getExpandableListView().setAdapter(new ContactsInfoAdapter());
		getExpandableListView().setCacheColorHint(0); // 设置拖动列表的时候防止出现黑色背景
		// getExpandableListView().setGroupIndicator(null);//去箭头
	}
	/**
	 * 模拟给组、子列表添加数据
	 * 
	 * @param g
	 *            -group
	 * @param c
	 *            -child
	 */
	private void addInfo(String g, String[] c) {
		group.add(g);
		List<String> childitem = new ArrayList<String>();
		for (int i = 0; i < c.length; i++) {
			childitem.add(c[i]);
		}
		child.add(childitem);
	}
//列表
	class ContactsInfoAdapter extends BaseExpandableListAdapter {
		// --Child--//
		@Override
		public Object getChild(int groupPosition, int childPosition) {
			return child.get(groupPosition).get(childPosition);
		}
		@Override
		public long getChildId(int groupPosition, int childPosition) {
			return childPosition;
		}
		@Override
		public int getChildrenCount(int groupPosition) {
			return child.get(groupPosition).size();
		}
		@Override
		public View getChildView(int groupPosition, int childPosition,
				boolean isLastChild, View convertView, ViewGroup parent) {
			String string = child.get(groupPosition).get(childPosition);
			return getGenericView(string);
		}
		// --Group--//
		@Override
		public Object getGroup(int groupPosition) {
			return group.get(groupPosition);
		}
		@Override
		public long getGroupId(int groupPosition) {
			return groupPosition;
		}
		@Override
		public int getGroupCount() {
			return group.size();
		}
		@Override
		public View getGroupView(int groupPosition, boolean isExpanded,
				View convertView, ViewGroup parent) {
			String string = group.get(groupPosition);
			return getGenericView(string);
		}
		// 创建组/子视图
		public TextView getGenericView(String s) {
			// Layout parameters for the ExpandableListView
			AbsListView.LayoutParams lp = new AbsListView.LayoutParams(
					ViewGroup.LayoutParams.FILL_PARENT, 64); // 框架行间距
			TextView text = new TextView(Organization.this);
			text.setLayoutParams(lp);
			// Center the text vertically
			text.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT);
			// Set the text starting position
			text.setPadding(36, 0, 0, 0);
			text.setTextSize(20);
			text.setText(s);
			return text;
		}
		@Override
		public boolean hasStableIds() {
			// TODO Auto-generated method stub
			return false;
		}
		@Override
		public boolean isChildSelectable(int groupPosition, int childPosition) {
			// TODO Auto-generated method stub
			return true;
		}
	}
//网络请求数据
	class URLConnectionThread extends Thread {
		@Override
		public void run() {
			// TODO Auto-generated method stub
			super.run();
			String contact_json = null;
			URL url;
			try {
				url = new URL(
						"http://42.51.5.89:9380/DailyReport_contact/servlet/DailyReportInfoServlet_contact");
				URLConnection conn = url.openConnection();
				InputStream is = conn.getInputStream();
				BufferedReader br = new BufferedReader(new InputStreamReader(
						is, "UTF-8"));
				String line;
				while ((line = br.readLine()) != null) {
					contact_json = new String(line);// 读取页面字符串转换为json
				}
				System.out.println("get depart ok is:" + contact_json);
				br.close();
			} catch (MalformedURLException e) {
				// TODO 自动生成的 catch 块
				e.printStackTrace();
			} catch (IOException e) {
				// TODO 自动生成的 catch 块
				e.printStackTrace();
			}
			Message msg = new Message();
			msg.what = SET_ORGANIZATION;
			msg.obj = contact_json;
			myhandler.sendMessage(msg);
			Log.v("contact_json", contact_json);
		}
	}
}