<?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;      }  }