学步园

http://blog.csdn.net/manymore13/article/details/6877955

本次代码是利用ListView+CheckBox批量删除item

利用CheckBox选中一个或多个item，最后批量删除它们。 

程序运行效果图如下：

下面开始上码：

(代码已更正,已解决滚动时紊乱的问题)

package com.test.adapter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import android.app.ListActivity;
import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import com.test.adapter.ArrayAdapterActivity.ListVIewAdapter.ViewHolder;


/**
 * ListView 批量删除Item
 * @author manymore13
 *
 */
public class ArrayAdapterActivity extends ListActivity {  
     
	private ListVIewAdapter ladapter;
    private List<String> strList = new ArrayList<String>();
    private List<Boolean> boolList = new ArrayList<Boolean>();
      
    boolean visflag = false;  
    ListView lv;  
    static String str[] ={"1苹果","2香蕉","3桔子","4猕猴桃","5李子","6甘蔗","7荔枝","8桃子","9香瓜","10葡萄","11哈密瓜","12桂圆","13龙眼","14","15","16","17","18","19","20"};  
    CheckBox cb;  
    {  
        for(int i=0;i<str.length;i++)  
        {  
        	strList.add(str[i]);
        	boolList.add(false);
        }  
    }  
  
      
    @Override  
    protected void onCreate(Bundle savedInstanceState)  
    {  
          
        super.onCreate(savedInstanceState);  
              
        ladapter = new ListVIewAdapter(this);  
          
        lv = this.getListView();  
        lv.setAdapter(ladapter);  
        
        lv.setScrollBarStyle(1);  
  
        lv.setOnItemClickListener(new OnItemClickListener()  
        {  
  
            @Override  
            public void onItemClick(AdapterView<?> parent,  
                    View view, int position, long id)  
            {  
            	if(visflag)
            	{
	                ViewHolder viewHolder = (ViewHolder) view.getTag();
	                viewHolder.cb.toggle();
 	                if(viewHolder.cb.isChecked())
	                {

	                	boolList.set(position, true);
	                }else{
	                	boolList.set(position, false);
	                }
             	}
            }  
        });  
          
    }  
      
    class ListVIewAdapter extends BaseAdapter  
    {  
          
        Context c;  
        LayoutInflater mInflater ;  
        ListVIewAdapter(Context context)  
        {  
            c = context;  
            mInflater = getLayoutInflater();  
        }  
        @Override  
        public int getCount()  
        {  
            return strList.size();  
        }  
  
        @Override  
        public Object getItem(int position)  
        {  
            return strList.get(position);  
        }  
  
        @Override  
        public long getItemId(int position)  
        {  
            return position;  
        }  
          
  
        @Override  
        public View getView(final int position, View convertView,  
                ViewGroup parent)  
        {  
            ViewHolder holder = null ;  
            if(convertView == null)  
            {  
            	
                holder = new ViewHolder();
                convertView  = mInflater.inflate(R.layout.list_item, null);
                holder.tv = (TextView)convertView.findViewById(R.id.textView);  
                holder.cb = (CheckBox)convertView.findViewById(R.id.checkBox);
                convertView.setTag(holder);
                
            }else{
            	holder = (ViewHolder) convertView.getTag();
            } 
            holder.tv.setText(strList.get(position));  
            holder.cb.setChecked(boolList.get(position));  
              
            if(visflag)  
            {  
                holder.cb.setVisibility(View.VISIBLE);  
            }  
            else  
            {  
                holder.cb.setVisibility(View.INVISIBLE);  
            }  
          
            return convertView;  
        }  
        class ViewHolder  
        {  
            TextView tv;  
            CheckBox cb;  
        }  
          
    }  
  
    @Override  
    public boolean onCreateOptionsMenu(Menu menu)  
    {  
          
        menu.add(0, 0, 0, "批量处理");  
        menu.add(0, 1, 0, "确定删除");  
        return super.onCreateOptionsMenu(menu);  
    }  
  
    @Override  
    public boolean onOptionsItemSelected(MenuItem item)  
    {  
        switch(item.getItemId())  
        {  
            case 0:  // 批量处理  
                {  
                    if(visflag)  
                    {  
                        visflag = false;  
                        for(int i=0; i<boolList.size();i++)
                        {
                        	boolList.set(i, false);
                        }
                    }  
                    else  
                    {  
                        visflag = true;  
                    }  
                    this.ladapter.notifyDataSetInvalidated();  
                    break;  
                }  
            case 1: //确定删除  
                {  
                    if(boolList.size()>0)  
                    {  
                    	if(visflag)
                    	{
	                    	for(int location=0; location<boolList.size(); )
	                    	{
	                    		if(boolList.get(location))
	                    		{
	                    			boolList.remove(location);
	                    			strList.remove(location);
	                    			continue;
	                    		}
	                    		location++;
	                    	}
                    	}
                          
                    }
                    this.ladapter.notifyDataSetChanged();
                    break;  
                }  
        }  
        return super.onOptionsItemSelected(item);  
    }  
      
      
}