SimpleAdapter adapter = new SimpleAdapter(this, getData(), R.layout.list_item, new String[]{"img","title","info",new int[]{R.id.img, R.id.title, R.id.info}});

class MyAdapter extends BaseAdapter
{
private Context context;
public MyAdapter(Context context)
{
this.context = context;
}
@Override
public int getCount() {
// How many items are in the data set represented by this Adapter.(在此适配器中所代表的数据集中的条目数)
            return 0;
}
@Override
public Object getItem(int position) {
// Get the data item associated with the specified position in the data set.(获取数据集中与指定索引对应的数据项)
            return null;
}
@Override
public long getItemId(int position) {
// Get the row id associated with the specified position in the list.(取在列表中与指定索引对应的行id)
            return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// Get a View that displays the data at the specified position in the data set.
            return null;
}
}

        @Override
public View getView(int position, View convertView, ViewGroup parent) {
View item = mInflater.inflate(R.layout.list_item, null);
ImageView img = (ImageView)item.findViewById(R.id.img)
TextView title = (TextView)item.findViewById(R.id.title);
TextView info = (TextView)item.findViewById(R.id.info);
img.setImageResource(R.drawable.ic_launcher);
title.setText("Hello");
info.setText("world");
return item;
}

        public View getView(int position, View convertView, ViewGroup parent) {
if(convertView == null)
{
convertView = mInflater.inflate(R.layout.list_item, null);
}
ImageView img = (ImageView)convertView.findViewById(R.id.img)
TextView title = (TextView)convertView.findViewById(R.id.title);
TextView info = (TextView)ConvertView.findViewById(R.id.info);
img.setImageResource(R.drawable.ic_launcher);
title.setText("Hello");
info.setText("world");
return convertView;
}

    //在外面先定义，ViewHolder静态类
    static class ViewHolder
{
public ImageView img;
public TextView title;
public TextView info;
}
//然后重写getView
        @Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if(convertView == null)
{
holder = new ViewHolder();
convertView = mInflater.inflate(R.layout.list_item, null);
holder.img = (ImageView)item.findViewById(R.id.img)
holder.title = (TextView)item.findViewById(R.id.title);
holder.info = (TextView)item.findViewById(R.id.info);
convertView.setTag(holder);
}else
{
holder = (ViewHolder)convertView.getTag();
holder.img.setImageResource(R.drawable.ic_launcher);
holder.title.setText("Hello");
holder.info.setText("World");
}
return convertView;
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<ListView
android:id="@+id/lv"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:fastScrollEnabled="true"
/>
</LinearLayout>

<?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="horizontal" >
<ImageView
android:id="@+id/img"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
>
<TextView
android:id="@+id/tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="20sp"
/>
<TextView
android:id="@+id/info"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="14sp"
/>
</LinearLayout>
</LinearLayout>

package com.loulijun.demo17;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
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 Demo17Activity extends Activity {
private ListView lv;
private List<Map<String, Object>> data;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
lv = (ListView)findViewById(R.id.lv);
//获取将要绑定的数据设置到data中
        data = getData();
MyAdapter adapter = new MyAdapter(this);
lv.setAdapter(adapter);
}
private List<Map<String, Object>> getData()
{
List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
Map<String, Object> map;
for(int i=0;i<10;i++)
{
map = new HashMap<String, Object>();
map.put("img", R.drawable.ic_launcher);
map.put("title", "跆拳道");
map.put("info", "快乐源于生活...");
list.add(map);
}
return list;
}
//ViewHolder静态类
    static class ViewHolder
{
public ImageView img;
public TextView title;
public TextView info;
}
public class MyAdapter extends BaseAdapter
{
private LayoutInflater mInflater = null;
private MyAdapter(Context context)
{
//根据context上下文加载布局，这里的是Demo17Activity本身，即this
            this.mInflater = LayoutInflater.from(context);
}
@Override
public int getCount() {
//How many items are in the data set represented by this Adapter.
//在此适配器中所代表的数据集中的条目数
            return data.size();
}
@Override
public Object getItem(int position) {
// Get the data item associated with the specified position in the data set.
//获取数据集中与指定索引对应的数据项
            return position;
}
@Override
public long getItemId(int position) {
//Get the row id associated with the specified position in the list.
//获取在列表中与指定索引对应的行id
            return position;
}
//Get a View that displays the data at the specified position in the data set.
//获取一个在数据集中指定索引的视图来显示数据
        @Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
//如果缓存convertView为空，则需要创建View
            if(convertView == null)
{
holder = new ViewHolder();
//根据自定义的Item布局加载布局
                convertView = mInflater.inflate(R.layout.list_item, null);
holder.img = (ImageView)convertView.findViewById(R.id.img);
holder.title = (TextView)convertView.findViewById(R.id.tv);
holder.info = (TextView)convertView.findViewById(R.id.info);
//将设置好的布局保存到缓存中，并将其设置在Tag里，以便后面方便取出Tag
                convertView.setTag(holder);
}else
{
holder = (ViewHolder)convertView.getTag();
}
holder.img.setBackgroundResource((Integer)data.get(position).get("img"));
holder.title.setText((String)data.get(position).get("title"));
holder.info.setText((String)data.get(position).get("info"));
return convertView;
}
}
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<ImageView
android:id="@+id/img"
android:layout_width="480px"
android:layout_height="480px"
android:layout_gravity="center"
/>
<Gallery
android:id="@+id/gallery"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:spacing="3dp"
android:layout_gravity="bottom"
/>
</LinearLayout>

package com.loulijun.demo16;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.ImageView;
public class Demo16Activity extends Activity {
private Gallery mGallery;
private ImageView mImg;
//图片数组
    private int[] pics = {
R.drawable.pic1,
R.drawable.pic2,
R.drawable.pic3,
R.drawable.pic4,
R.drawable.pic5,
R.drawable.pic6
};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mImg = (ImageView)findViewById(R.id.img);
mGallery = (Gallery)findViewById(R.id.gallery);
MyAdapter adapter = new MyAdapter(this);
mGallery.setAdapter(adapter);
mGallery.setOnItemClickListener(new Gallery.OnItemClickListener()
{
@Override
public void onItemClick(AdapterView<?> adapter, View view, int position,
long arg3) {
mImg.setImageResource(pics[position]);
}
});
}
//内部类
    class MyAdapter extends BaseAdapter
{
//用来接收传递过来的Context上下文对象
        private Context context;
//构造函数
        public MyAdapter(Context context)
{
this.context = context;
}
@Override
public int getCount() {
//返回图片数组大小
            return pics.length;
}
@Override
public Object getItem(int position) {
//根据选中项返回索引位置
            return position;
}
@Override
public long getItemId(int position) {
//根据选中项id返回索引位置
            return position;
}
//未优化的getView，这部分可以使用recycle()释放内存、或者BitmapFacotry.Options缩小，或者软引用，或者控制图片资源大小等等很多方法，找时间专门写
        @Override
public View getView(int position, View convertView, ViewGroup parent) {
ImageView img = new ImageView(context);
img.setAdjustViewBounds(true);
img.setImageResource(pics[position]);
img.setScaleType(ImageView.ScaleType.FIT_XY);
img.setLayoutParams(new Gallery.LayoutParams(120,120));
return img;
}
}
}