android的liveview装载数据

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >
    
    <TextView
        android:id="@+id/itemsTitle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_vertical"
        android:paddingLeft="10dip"
        android:paddingTop="5dip"
        android:textColor="@color/gray_black"
        android:textSize="18dip" />
    <TextView
        android:id="@+id/itemsText"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/itemsTitle"
        android:gravity="left"
        android:paddingBottom="2dip"
        android:paddingLeft="10dip"
        android:textColor="@color/gray"
        android:textSize="15dip" />

</RelativeLayout>

		//获取数据
		Intent intent = getIntent();
		Bundle bundle = intent.getExtras();
		SerializableMaplist SerializableMaplist = (SerializableMaplist) bundle.get("listdata");
		maplist =SerializableMaplist.getMap();  
		//填充数据
		ListView mListView = (ListView)findViewById(R.id.listview);
		//使用自定义的Adapter
		MyListViewAdapter myListViewAdapter = new MyListViewAdapter(this, maplist,R.layout.list_items,
						new String[] {"rqsj","s","f" ,"JLR"}, 
						new int[] {R.id.itemsTitle,R.id.itemsText });
			 mListView.setAdapter(myListViewAdapter);

package com.xjx.adapter;

import java.util.List;
import java.util.Map;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

/**
 * Copyright (c) 2011 All rights reserved 
 * 名称：MyListViewAdapter 
 * 描述：ListView自定义Adapter例子
 * @author zhaoqp
 * @date 2011-11-8
 * @version
 */
public class MyListViewAdapter extends BaseAdapter{
  
	private Context mContext;
    //单行的布局
    private int mResource;
    //列表展现的数据
    private List<? extends Map<String, ?>> mData;
    //Map中的key
    private String[] mFrom;
    //view的id
    private int[] mTo;
    
   /**
    * 构造方法
    * @param context
    * @param data 列表展现的数据
    * @param resource 单行的布局
    * @param from Map中的key
    * @param to view的id
    */
    public MyListViewAdapter(Context context, List<? extends Map<String, ?>> data,
            int resource, String[] from, int[] to){
    	 mContext = context;
    	 mData = data;
         mResource = resource;
         mFrom = from;
         mTo = to;
    }   
    
    @Override
    public int getCount() {
        return mData.size();
    }
    
    @Override
    public Object getItem(int position) {
        return mData.get(position);
    }

    @Override
    public long getItemId(int position){
      return position;
    }
    
    @Override
    public View getView(int position, View convertView, ViewGroup parent){
    	  final ViewHolder holder;
          if(convertView == null){
	          //使用自定义的list_items作为Layout
	          convertView = LayoutInflater.from(mContext).inflate(mResource, parent, false);
	          //使用减少findView的次数
			  holder = new ViewHolder();
			  holder.itemsTitle = ((TextView) convertView.findViewById(mTo[0]));
			  holder.itemsText = ((TextView) convertView.findViewById(mTo[1]));
			  //设置标记
			  convertView.setTag(holder);
          }else{
        	  holder = (ViewHolder) convertView.getTag();
          }
	      //设置数据
          final Map<String, ?> dataSet = mData.get(position);
          if (dataSet == null) {
              return null;
          }
          //获取该行数据
          final Object data1 = dataSet.get(mFrom[0]);
          final Object data2 = dataSet.get(mFrom[1]);
          final Object data3 = dataSet.get(mFrom[2]);
          final Object data4 = dataSet.get(mFrom[3]);
          //设置数据到View
          holder.itemsTitle.setText(data1.toString()+"  "+data2.toString()+":"+data3.toString());
          holder.itemsText.setText(data4.toString());
          return convertView;
    }
    
    /**
	 * ViewHolder类
	 */
	static class ViewHolder {
		TextView itemsTitle;
		TextView itemsText;
	}
}