Gallery可拖动的图标

package com.zgj;

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 GalleryActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
       
        Gallery gallery = (Gallery) findViewById(R.id.Gallery1);
        //将存放图片的ImageAdapter给gallery对象
        gallery.setAdapter(new ImageAdapter(this));
       
        //设置gallery 的背景图片
        gallery.setBackgroundResource(R.drawable.back);
       
        //设置Gallery的监听事件
        gallery.setOnItemClickListener(new OnItemClickListener(){

   public void onItemClick(AdapterView> parent, View view,
     int position, long id) {
    // TODO Auto-generated method stub
    Toast.makeText(GalleryActivity.this, "您选择的是："+(position+1)+"号图片", Toast.LENGTH_SHORT).show();
   }
        
        });
    }
}



package com.zgj;

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Content
private Context mContext;
//定义一个数组，存放图片资源
private Integer[] mImageIds = {
   R.drawable.img1,
   R.drawable.img2,
   R.drawable.img3,
   R.drawable.img4,
   R.drawable.img5,
   R.drawable.img6,
   R.drawable.img7,
};

//构造
public ImageAdapter(Context c){
  mContext = c;
}
//获取图片的个数
public int getCount() {
  // TODO Auto-generated method stub
  return mImageIds.length;
}
//获取图片在库中的位置
public Object getItem(int position) {
  // TODO Auto-generated method stub
  return position;
}
//获取图片在库中的ID
public long getItemId(int position) {
  // TODO Auto-generated method stub
  return position;
}
//将图片取出来
public View getView(int position, View convertView, ViewGroup parent) {
  //要取出图片，即要定义一个ImageView来存
  ImageView imageView = new ImageView(mContext);
  imageView.setImageResource(mImageIds[position]);
  //设置布局图片以120*120显示
  imageView.setLayoutParams(new Gallery.LayoutParams(80, 80));
  //设置显示比例类型
  imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);
  return imageView;
}

}