xml：
<?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="删除" /> </LinearLayout> <ListView android:id="@+id/lv" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_below="@+id/line" /> </RelativeLayout>
MainActivity.class
package com.example.zhoukao_one1; import java.util.ArrayList; import java.util.List; import com.example.zhoukao_one1.MyAdapter.ViewHolder; import android.os.Bundle; import android.app.Activity; import android.view.Menu; import android.view.View; import android.view.View.OnClickListener; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.Button; import android.widget.ListView; import android.widget.TextView; public class MainActivity extends Activity { private ListView lv; private MyAdapter mAdapter; // private ArrayList<String> list; private List<User> list; private Button bt_selectall; private Button bt_cancel; private Button bt_deselectall; private String[] name=new String[]{"马克思","*格斯","斯大林","***"}; 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.activity_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_cancleselectall); bt_deselectall = (Button) findViewById(R.id.bt_deselectall); tv_show = (TextView) findViewById(R.id.tv); // list = new ArrayList<String>(); list=new ArrayList<User>(); // 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* 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 < name.length; i++) { User u=new User(); u.setName(name[i]); list.add(u); } ; } // 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"); }; }