Android使用ListView批量删除item的方法

本文实例讲述了android使用listview批量删除item的方法。分享给大家供大家参考，具体如下：

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);
  }
}

还有list_item.xml

<?xml version="1.0" encoding="utf-8"?>
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  >
  <relativelayout
    android:layout_width="fill_parent"
    android:layout_height="wrap_content">
    <textview
      android:id="@+id/textview"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="@string/hello"
      android:layout_alignparentleft="true"
      android:layout_centervertical="true"
      />
    <checkbox
      android:id="@+id/checkbox"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_alignparentright="true"
      android:visibility="gone"
      android:focusable="false"
      android:focusableintouchmode="false"
      android:clickable="false"
      />
  </relativelayout>
</linearlayout>

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