package com.lxt008;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.widget.AdapterView;import android.widget.Gallery;import android.widget.Toast;import android.widget.AdapterView.OnItemClickListener;public class Activity01 extends Activity{    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState)    {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        //获得Gallery对象        Gallery g = (Gallery) findViewById(R.id.Gallery01);        //添加ImageAdapter给Gallery对象        g.setAdapter(new ImageAdapter(this));        //设置Gallery的背景        g.setBackgroundResource(R.drawable.bg0);                //设置Gallery的事件监听        g.setOnItemClickListener(new OnItemClickListener() {            public void onItemClick(AdapterView<?> parent, View v, int position, long id)            {                Toast.makeText(Activity01.this,"你选择了"+(position+1)+" 号图片",                     Toast.LENGTH_SHORT).show();            }        });    }}

package com.lxt008;import android.content.Context;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.Gallery;import android.widget.ImageView;public class ImageAdapter extends BaseAdapter{    // 定义Context    private Context        mContext;            // 定义整型数组 即图片源    private Integer[]    mImageIds =     {                                     R.drawable.img1,             R.drawable.img2,             R.drawable.img3,             R.drawable.img4,             R.drawable.img5,             R.drawable.img6,             R.drawable.img7,            R.drawable.img8,            };    // 声明 ImageAdapter    public ImageAdapter(Context c)    {        mContext = c;    }    // 获取图片的个数    public int getCount()    {        return mImageIds.length;    }    // 获取图片在库中的位置    public Object getItem(int position)    {        return position;    }    // 获取图片ID    public long getItemId(int position)    {        return position;    }    public View getView(int position, View convertView, ViewGroup parent)    {        ImageView imageview = new ImageView(mContext);        // 给ImageView设置资源        imageview.setImageResource(mImageIds[position]);        // 设置布局 图片120×120显示        imageview.setLayoutParams(new Gallery.LayoutParams(120, 120));        // 设置显示比例类型        imageview.setScaleType(ImageView.ScaleType.FIT_CENTER);        return imageview;    }}

<?xml version="1.0" encoding="utf-8"?><Gallery xmlns:android="http://schemas.android.com/apk/res/android"   android:id="@+id/Gallery01"  android:layout_width="fill_parent"  android:layout_height="wrap_content"/>