Listview加载不同布局

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity" >

    <ListView
        android:id="@+id/lv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
       />

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >
    <TextView 
        android:id="@+id/title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="36sp"
        android:background="#f00"
        />

</LinearLayout>

package com.ch.baseadapterdemo;

import java.util.ArrayList;

import android.os.Bundle;
import android.app.Activity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;

public class MainActivity extends Activity {
    private ListView lv;
    ArrayList<ItemB> bs = new ArrayList<ItemB>();    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        lv = (ListView) findViewById(R.id.lv);
        getData();
        lv.setAdapter(new MyAdapter());
    }
    
    public void getData(){
        bs.add(new ItemB(R.drawable.ic_launcher, "zzz0", 1));
        bs.add(new ItemB(R.drawable.ic_launcher, "zzz1", 1));
        bs.add(new ItemB(R.drawable.ic_launcher, "zzz2", 0));
        bs.add(new ItemB(R.drawable.ic_launcher, "zzz3", 1));
        bs.add(new ItemB(R.drawable.ic_launcher, "zzz4", 0));
        bs.add(new ItemB(R.drawable.ic_launcher, "zzz5", 1));
        bs.add(new ItemB(R.drawable.ic_launcher, "zzz6", 1));
        bs.add(new ItemB(R.drawable.ic_launcher, "zzz7", 1));
        bs.add(new ItemB(R.drawable.ic_launcher, "zzz8", 1));
        bs.add(new ItemB(R.drawable.ic_launcher, "zzz9", 0));
        bs.add(new ItemB(R.drawable.ic_launcher, "zzz10", 1));
        bs.add(new ItemB(R.drawable.ic_launcher, "zzz11", 1));
        bs.add(new ItemB(R.drawable.ic_launcher, "zzz13", 1));
        bs.add(new ItemB(R.drawable.ic_launcher, "zzz14", 0));
        bs.add(new ItemB(R.drawable.ic_launcher, "zzz15", 1));
        bs.add(new ItemB(R.drawable.ic_launcher, "zzz16", 0));
        bs.add(new ItemB(R.drawable.ic_launcher, "zzz17", 1));
        bs.add(new ItemB(R.drawable.ic_launcher, "zzz18", 0));
        bs.add(new ItemB(R.drawable.ic_launcher, "zzz19", 1));
    
    }
    
    class MyAdapter extends BaseAdapter{
        
          public static final int ITEM_TITLE = 0;
          public static final int ITEM_INTRODUCE = 1;
          LayoutInflater inflater = LayoutInflater.from(getApplicationContext());
        @Override
        public int getCount() {
            // TODO Auto-generated method stub
            return bs.size();
        }

        @Override
        public Object getItem(int position) {
            // TODO Auto-generated method stub
            return bs.get(position);
        }
        
        @Override
        public int getItemViewType(int position) {
            // TODO Auto-generated method stub
            //判断依据
            return bs.get(position).getType();
        }
        
        @Override
        public int getViewTypeCount() {
            // TODO Auto-generated method stub
            //布局个数
            return 2;
        }

        @Override
        public long getItemId(int position) {
            // TODO Auto-generated method stub
            return position;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            // TODO Auto-generated method stub
            int type = getItemViewType(position);

            Holder1 holder1 = null;
            Holder2 holder2 = null;
            //优化
            if (convertView == null) {
                //选择某一个样式。。
                switch (type) {
                case ITEM_TITLE:
                  convertView = inflater.inflate(R.layout.item_title, null);
                  holder1 = new Holder1();
                  holder1.play_title = (TextView) convertView.findViewById(R.id.title);
                   //赋值
                  holder1.play_title.setText(bs.get(position).getName());

                  convertView.setTag(holder1);
                  break;
                case ITEM_INTRODUCE:
                  convertView = inflater.inflate(R.layout.item_children,null);
                  holder2 = new Holder2();
                  holder2.play_info = (TextView) convertView.findViewById(R.id.info);
                  holder2.play_img = (ImageView) convertView.findViewById(R.id.img); 
                  //赋值
                  holder2.play_img.setBackgroundResource(bs.get(position).getImg());
                 holder2.play_info.setText(bs.get(position).getName());
                  convertView.setTag(holder2);
                  break;
               
                }
              } else {
                switch (type) {
                case ITEM_TITLE:
                  holder1 = (Holder1) convertView.getTag();
                  holder1.play_title.setText(bs.get(position).getName());
                  break;
                case ITEM_INTRODUCE:
                  holder2 = (Holder2) convertView.getTag();
                  holder2.play_info.setText(bs.get(position).getName());
                  holder2.play_img.setBackgroundResource(bs.get(position).getImg());
                  break;

                default:
                  break;
                }

              }

              return convertView;
        }
        
    }
    
    // 两个样式 两个holder。100就写100holder。。当然你何以把他抽离出来这里先只为了说明问题
      class Holder1 {
        TextView play_title;
      }

      class Holder2 {
        TextView play_info;
        ImageView play_img;
      }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }

}

package com.ch.baseadapterdemo;

public class ItemB {
    private int img;
    private String name;
    private int type;
    public ItemB(int img, String name, int type) {
        super();
        this.img = img;
        this.name = name;
        this.type = type;
    }
    public int getImg() {
        return img;
    }
    public void setImg(int img) {
        this.img = img;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getType() {
        return type;
    }
    public void setType(int type) {
        this.type = type;
    }