Android使用ListView大量刪除item的方法_Android

本文執行個體講述了Android使用ListView大量刪除item的方法。分享給大家供大家參考，具體如下：

利用CheckBox選中一個或多個item，最後大量刪除它們。

程式運行效果圖如下：

 

下面開始上碼：

(代碼已更正,已解決滾動時紊亂的問題)

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 大量刪除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蘋果","2香蕉","3桔子","4奇異果","5李子","6甘蔗","7荔枝","8桃子","9香瓜","10葡萄","11哈密瓜","12桂圓","13龍眼","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, "批量處理");    menu.add(0, 1, 0, "確定刪除");    return super.onCreateOptionsMenu(menu);  }  @Override  public boolean onOptionsItemSelected(MenuItem item)  {    switch(item.getItemId())    {      case 0: // 批量處理        {          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: //確定刪除        {          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);  }}

還有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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