Android checkbox的listView(多选,全选,反选)具体实现方法

<?xml version="1.0" encoding="utf-8"?> 
<relativelayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:orientation="horizontal" > 

    <textview 
        android:id="@+id/tv" 
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content" 
        android:layout_gravity="center_vertical" /> 

    <linearlayout 
        android:id="@+id/line" 
        android:layout_width="fill_parent" 
        android:layout_height="50dp" 
        android:layout_below="@+id/tv" 
        android:orientation="horizontal" > 

        <button 
            android:id="@+id/bt_selectall" 
            android:layout_width="80dp" 
            android:layout_height="fill_parent" 
            android:text="全选" /> 

             <button 
            android:id="@+id/bt_cancleselectall" 
            android:layout_width="80dp" 
            android:layout_height="fill_parent" 
            android:text="反选" /> 

         
        <button 
            android:id="@+id/bt_deselectall" 
            android:layout_width="80dp" 
            android:layout_height="fill_parent" 
            android:text="取消选择" /> 

    </linearlayout> 

    <listview 
        android:id="@+id/lv" 
        android:layout_width="fill_parent" 
        android:layout_height="fill_parent" 
        android:layout_below="@+id/line" /> 

</relativelayout> 
 

<?xml version="1.0" encoding="utf-8"?> 
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:orientation="horizontal" > 

    <textview 
        android:id="@+id/item_tv" 
        android:layout_width="0dp" 
        android:layout_height="wrap_content" 
        android:layout_gravity="center_vertical" 
        android:layout_weight="1" /> 

    <checkbox 
        android:id="@+id/item_cb" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:clickable="false" 
        android:focusable="false" 
        android:focusableintouchmode="false" 
        android:gravity="center_vertical" /> 

</linearlayout> 
 

public class ex_checkboxactivity extends activity { 
    private listview lv; 
    private myadapter madapter; 
    private arraylist<string> list; 
    private button bt_selectall; 
    private button bt_cancel; 
    private button bt_deselectall; 
    private int checknum; // 记录选中的条目数量 
    private textview tv_show;// 用于显示选中的条目数量 

    /** called when the activity is first created. */ 

    @override 
    public void oncreate(bundle savedinstancestate) { 
        super.oncreate(savedinstancestate); 
        setcontentview(r.layout.main); 
        /* 实例化各个控件 */ 
        lv = (listview) findviewbyid(r.id.lv); 
        bt_selectall = (button) findviewbyid(r.id.bt_selectall); 
        bt_cancel = (button) findviewbyid(r.id.bt_cancelselectall); 
        bt_deselectall = (button) findviewbyid(r.id.bt_deselectall); 
        tv_show = (textview) findviewbyid(r.id.tv); 
        list = new arraylist<string>(); 
        // 为adapter准备数据 
        initdate(); 
        // 实例化自定义的myadapter 
        madapter = new myadapter(list, this); 
        // 绑定adapter 
        lv.setadapter(madapter); 

        // 全选按钮的回调接口 
        bt_selectall.setonclicklistener(new onclicklistener() { 
            @override 
            public void onclick(view v) { 
                // 遍历list的长度，将myadapter中的map值全部设为true 
                for (int i = 0; i < list.size(); i++) { 
                    myadapter.getisselected().put(i, true); 
                } 
                // 数量设为list的长度 
                checknum = list.size(); 
                // 刷新listview和textview的显示 
                datachanged(); 
            } 
        }); 

        // 反选按钮的回调接口 
        bt_cancel.setonclicklistener(new onclicklistener() { 
            @override 
            public void onclick(view v) { 
                // 遍历list的长度，将已选的设为未选，未选的设为已选 
                for (int i = 0; i < list.size(); i++) { 
                    if (myadapter.getisselected().get(i)) { 
                        myadapter.getisselected().put(i, false); 
                        checknum--; 
                    } else { 
                        myadapter.getisselected().put(i, true); 
                        checknum++; 
                    } 
                } 
                // 刷新listview和textview的显示 
                datachanged(); 
            } 
        }); 

        // 取消按钮的回调接口 
        bt_deselectall.setonclicklistener(new onclicklistener() { 
            @override 
            public void onclick(view v) { 
                // 遍历list的长度，将已选的按钮设为未选 
                for (int i = 0; i < list.size(); i++) { 
                    if (myadapter.getisselected().get(i)) { 
                        myadapter.getisselected().put(i, false); 
                        checknum--;// 数量减1 
                    } 
                } 
                // 刷新listview和textview的显示 
                datachanged(); 
            } 
        }); 

        // 绑定listview的监听器 
        lv.setonitemclicklistener(new onitemclicklistener() { 
            @override 
            public void onitemclick(adapterview<?> arg0, view arg1, int arg2, 
                    long arg3) { 
                // 取得viewholder对象，这样就省去了通过层层的findviewbyid去实例化我们需要的cb实例的步骤 
                viewholder holder = (viewholder) arg1.gettag(); 
                // 改变checkbox的状态 
                holder.cb.toggle(); 
                // 将checkbox的选中状况记录下来 
                myadapter.getisselected().put(arg2, holder.cb.ischecked()); 
                // 调整选定条目 
                if (holder.cb.ischecked() == true) { 
                    checknum++; 
                } else { 
                    checknum--; 
                } 
                // 用textview显示 
                tv_show.settext("已选中" + checknum + "项"); 
            } 
        }); 
    } 

    // 初始化数据 
    private void initdate() { 
        for (int i = 0; i < 15; i++) { 
            list.add("data" + " " + i); 
        } 

    } 
    // 刷新listview和textview的显示 
    private void datachanged() { 
        // 通知listview刷新 
        madapter.notifydatasetchanged(); 
        // textview显示最新的选中数目 
        tv_show.settext("已选中" + checknum + "项"); 
    }; 
} 

package com.notice.listcheck; 

import java.util.arraylist; 
import java.util.hashmap; 

import android.content.context; 
import android.view.layoutinflater; 
import android.view.view; 
import android.view.viewgroup; 
import android.widget.baseadapter; 
import android.widget.checkbox; 
import android.widget.textview; 

public class myadapter extends baseadapter { 
    // 填充数据的list 
    private arraylist<string> list; 
    // 用来控制checkbox的选中状况 
    private static hashmap<integer, boolean> isselected; 
    // 上下文 
    private context context; 
    // 用来导入布局 
    private layoutinflater inflater = null; 

    // 构造器 
    public myadapter(arraylist<string> list, context context) { 
        this.context = context; 
        this.list = list; 
        inflater = layoutinflater.from(context); 
        isselected = new hashmap<integer, boolean>(); 
        // 初始化数据 
        initdate(); 
    } 

    // 初始化isselected的数据 
    private void initdate() { 
        for (int i = 0; i < list.size(); i++) { 
            getisselected().put(i, false); 
        } 
    } 

    @override 
    public int getcount() { 
        return list.size(); 
    } 

    @override 
    public object getitem(int position) { 
        return list.get(position); 
    } 

    @override 
    public long getitemid(int position) { 
        return position; 
    } 

    @override 
    public view getview(int position, view convertview, viewgroup parent) { 
        viewholder holder = null; 
        if (convertview == null) { 
            // 获得viewholder对象 
            holder = new viewholder(); 
            // 导入布局并赋值给convertview 
            convertview = inflater.inflate(r.layout.listviewitem, null); 
            holder.tv = (textview) convertview.findviewbyid(r.id.item_tv); 
            holder.cb = (checkbox) convertview.findviewbyid(r.id.item_cb); 
            // 为view设置标签 
            convertview.settag(holder); 
        } else { 
            // 取出holder 
            holder = (viewholder) convertview.gettag(); 
        } 
        // 设置list中textview的显示 
        holder.tv.settext(list.get(position)); 
        // 根据isselected来设置checkbox的选中状况 
        holder.cb.setchecked(getisselected().get(position)); 
        return convertview; 
    } 

    public static hashmap<integer, boolean> getisselected() { 
        return isselected; 
    } 

    public static void setisselected(hashmap<integer, boolean> isselected) { 
        myadapter.isselected = isselected; 
    } 

    public static class viewholder { 
        textview tv; 
        checkbox cb; 
    } 
}