GridView中item 单选、多选

效果如图：

单选

多选

GriaView的适配器：

import java.util.List;
import java.util.Map;
import java.util.Vector;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.LayerDrawable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TextView;
 
public class GridRadioAdapter extends BaseAdapter{   
    private Context mContext;           // 定义Context
//    private Vector<Integer> mImageIds = new Vector<Integer>();  // 定义一个向量作为图片源
    private Vector<Boolean> mImage_bs = new Vector<Boolean>();  // 定义一个向量作为选中与否容器
    private List<Map<String,Object>> gridTextList;
     
    private int lastPosition = -1;      //记录上一次选中的图片位置，-1表示未选中任何图片
    private boolean multiChoose;        //表示当前适配器是否允许多选
    private int flag = 0;//0：套餐 1：首月资费 2：业务包 3：优惠
    
    private LayoutInflater inflate;
     
    /**
     * 
     * @param c 上下文
     * @param gridTextList 填充数据
     * @param index 默认选中位置 -1为什么都不选
     * @param isMulti 是否为多选 true多选，false单选
     * @param flag 0：套餐，1：首月资费，2：可选业务包，3：优惠
     */
    public GridRadioAdapter(Context c,List<Map<String,Object>> gridTextList,int index, boolean isMulti,int flag){
        mContext = c;
        multiChoose = isMulti;
        this.gridTextList = gridTextList;
        inflate = LayoutInflater.from(mContext);
        lastPosition = index;
        this.flag = flag;
        
        // 装入资源
        for(int i = 0 ;i<gridTextList.size();i++){
         if(i == lastPosition){
          mImage_bs.add(true);
         }else{
          mImage_bs.add(false);
         }
        }
    }
     
    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return gridTextList.size();
    }
 
    @Override
    public Object getItem(int position) {
        // TODO Auto-generated method stub
        return position;
    }
 
    @Override
    public long getItemId(int position) {
        // TODO Auto-generated method stub
         return position;
    }
 
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {

     ViewHolder holder ;
     if (convertView == null)
        {
      holder = new ViewHolder();
         convertView = inflate.inflate(R.layout.grid_item, null);
         holder.grid_iv = (ImageView) convertView.findViewById(R.id.img_checked);
         holder.grid_tv = (TextView) convertView.findViewById(R.id.grid_text);
         holder.grid_ll = (RelativeLayout) convertView.findViewById(R.id.grid_relative);
         convertView.setTag(holder);
        }
        else
        {
            holder = (ViewHolder) convertView.getTag();
        }
        
        if(mImage_bs.elementAt(position)){
         holder.grid_iv.setVisibility(View.VISIBLE);
         holder.grid_ll.setBackgroundResource(R.drawable.new_add_item_bg_2);
        }else{
         holder.grid_iv.setVisibility(View.GONE);
         holder.grid_ll.setBackgroundResource(R.drawable.new_add_item_bg_1);
        }
        String obj = "";
        switch(flag){
        case 0:
         obj = gridTextList.get(position).get("PACKAGE_NAME").toString();
         break;
        case 1:
         obj = gridTextList.get(position).get("FIRSTMONPRICE_NAME").toString();
         break;
        case 2:
         obj = gridTextList.get(position).get("BUSINESSPACKAGE_NAME").toString();
         break;
        case 3:
         obj = gridTextList.get(position).get("PROMOTIONS_NAME").toString();
         break;
        }
        
        holder.grid_tv.setText(obj);
        
        return convertView;
    }
    
    
    
    private LayerDrawable makeBmp(int id, boolean isChosen){
        Bitmap mainBmp = ((BitmapDrawable)mContext.getResources().getDrawable(id)).getBitmap();
         
        // 根据isChosen来选取对勾的图片
        Bitmap seletedBmp = null;
        if(isChosen == true)
            seletedBmp = BitmapFactory.decodeResource(mContext.getResources(),
                    R.drawable.checkbox_checked);
        else
            seletedBmp = BitmapFactory.decodeResource(mContext.getResources(),
                    R.drawable.checkbox_unchecked);
         
        // 产生叠加图
        Drawable[] array = new Drawable[2];
        array[0] = new BitmapDrawable(mainBmp);
        array[1] = new BitmapDrawable(seletedBmp);
        LayerDrawable la = new LayerDrawable(array);
        la.setLayerInset(0, 0, 0, 0, 0);
        la.setLayerInset(1, 0, -5, 60, 45 );
          
        return la;  //返回叠加后的图
    }
 
    // 修改选中的状态
    public void changeState(int position){
        // 多选时
        if(multiChoose == true){   
         if(position == gridTextList.size()-1){//当选择的是最后一项时，取消 其他选中状态
//          mImage_bs.setElementAt(true,position);
          for(int i = 0;i<gridTextList.size()-1;i++){
           mImage_bs.setElementAt(false,i);
          }
         }else{
             
          mImage_bs.setElementAt(false, gridTextList.size()-1);
         }
         mImage_bs.setElementAt(!mImage_bs.elementAt(position), position);   //直接取反即可
        }
        // 单选时
        else{                      
            if(lastPosition != -1)
                mImage_bs.setElementAt(false, lastPosition);    //取消上一次的选中状态
            mImage_bs.setElementAt(!mImage_bs.elementAt(position), position);   //直接取反即可
            lastPosition = position;        //记录本次选中的位置
        }
        notifyDataSetChanged();     //通知适配器进行更新
    }
    
    /**
     * 返回选中与否容器
     * @author 
     */
    public Vector<Boolean> getSelectedVector(){
  return mImage_bs;
     
    }
    
    class ViewHolder{
     public TextView grid_tv;
     public ImageView grid_iv;
     public RelativeLayout grid_ll;
    }
}

注意：由于我们的项目对多选要求是这样的：当选择最后一项时，其他项都不可选；当选择的是其他项时，最后一项不可选，其他可多选。
如果是普通多选的话，只要changeState方法中当 multiChoose为true时，设置取反即可：

public void changeState(int position){
        // 多选时
        if(multiChoose == true){   
mImage_bs.setElementAt(!mImage_bs.elementAt(position), position);   //直接取反即可
  }
}

activity调用：

busPackAdpater = new GridRadioAdapter(BusinessAddActivity.this,businessPackContentList,businessPackContentList.size()-1,false,2);
       business_gv.setAdapter(busPackAdpater);