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

布局文件：
[html] 
代码如下:
<?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> 
 
 
listView 的item布局文件：
[html]
代码如下:
<?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" 
        a ndroid: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> 
 
Activity:
[java]
代码如下:
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 
     
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState); 
        setContentView(R.layout.main); 
         
        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 
   &nb sp;            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 
         &nbs p;          } 
                } 
                // 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");      }; 
} 

列表适配器：
[java] 
代码如下:
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 { 
        & nbsp;   // 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; 
    } 
} 
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