全选，反选，全不选以及计算价格

代码如下：实现购物车类似的功能，分为两个class，两个xml：

activity_main.xml:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >
  <LinearLayout
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      >
    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="全选"
        android:layout_weight="1"
        />

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="反 选" />

    <Button
        android:id="@+id/button3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="全不选"
         android:layout_weight="1"
        />
</LinearLayout>
<TextView
    android:id="@+id/price"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    />
<ListView
    android:id="@+id/listveiw"
    android:layout_width="match_parent"
    android:layout_height="match_parent"

    ></ListView>

</LinearLayout>

MainActivity.class主页面，重要代码存在处：

package com.example.day_all_button;

import java.util.ArrayList;
import java.util.List;

import com.example.day_all_button.Adper.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.BaseAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;

public class MainActivity extends Activity implements OnClickListener{

     private Button button1;
        private Button button2;
        private Button button3;
        private ListView listView;
        private List<Good> list;
        private TextView price;
        private int num=0;
        private int pric=0;
        private BaseAdapter adapter;
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
          button1 = (Button) findViewById(R.id.button1);//全选
            button2 = (Button) findViewById(R.id.button2);//反选
            button3 = (Button) findViewById(R.id.button3);//全不选
            listView = (ListView) findViewById(R.id.listveiw);//价格
            price = (TextView) findViewById(R.id.price);
            list = new ArrayList<Good>();
            //赋值
            for (int i = 0; i < 80; i++) {
                list.add(new Good(i+"", false));
            }
            //适配
            adapter = new Adper(list,MainActivity.this);
            listView.setAdapter(adapter);
            button1.setOnClickListener(this);
            button2.setOnClickListener(this);
            button3.setOnClickListener(this);
            // 绑定listView的监听器
            listView.setOnItemClickListener(new OnItemClickListener() {

                public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
                        long arg3) {
                    // TODO Auto-generated method stub
                     // 取得ViewHolder对象
                    ViewHolder viewHolder = (ViewHolder) arg1.getTag();
                     // 改变CheckBox的状态
                    viewHolder.checkBox.toggle();
                     // 将CheckBox的选中状况记录下来
                    list.get(arg2).setBo(viewHolder.checkBox.isChecked());
                     // 调整选定条目
                    if (viewHolder.checkBox.isChecked() == true) {
                        num++;
                        pric+=Integer.parseInt(list.get(arg2).getName());
                    } else {
                        num--;
                        pric-=Integer.parseInt(list.get(arg2).getName());
                    }
                    // 用TextView显示
                    price.setText("一共选了"+num+"件,"+"价格是"+pric+"元");
                }
            });

    }
    @Override
    public void onClick(View arg0) {
        // TODO Auto-generated method stub
        switch (arg0.getId()) {
        case R.id.button1:
              num = 0;
              pric = 0;

             for (int i = 0; i < list.size(); i++) {
                 //改变boolean
                 list.get(i).setBo(true);
                 //如果为选中
                      if(list.get(i).getBo()){

                      num++;
                      pric+=Integer.parseInt(list.get(i).getName());

                 }
             }
             //刷新
             adapter.notifyDataSetChanged();
             //显示
             price.setText("一共选了"+num+"件,"+"价格是"+pric+"元");
             break;
        case R.id.button2:
               num = 0;
               pric = 0;
              for (int i = 0; i < list.size(); i++) {
                  //改值
                  if(list.get(i).getBo()){
                      list.get(i).setBo(false);
                  }else{
                      list.get(i).setBo(true);
                  }
                  //刷新
                  adapter.notifyDataSetChanged();
                  //如果为选中
                  if(list.get(i).getBo()){

                       num++;
                       pric+=Integer.parseInt(list.get(i).getName());

                  }
              }
              // 用TextView显示
              price.setText("一共选了"+num+"件,"+"价格是"+pric+"元");
              break;
        case R.id.button3:
              num = 0;
              pric = 0;
             for (int i = 0; i < list.size(); i++) {
                 //改值
                 list.get(i).setBo(false);
                 //刷新
                 adapter.notifyDataSetChanged();
                 //如果为选中
                 if(list.get(i).getBo()){
                      num++;
                      pric+=Integer.parseInt(list.get(i).getName());
                 } 

             }
             price.setText("一共选了"+num+"件,"+"价格是"+pric+"元");
            break;
        }
          }

}

需要定义一个vo类，泳衣存放boolean类型的值，判断是否选中：

package com.example.day_all_button;

public class Good {
    private String name;
    private boolean bo;
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public boolean getBo() {
        return bo;
    }
    public void setBo(boolean bo) {
        this.bo = bo;
    }
    public Good(String name, boolean bo) {
        super();
        this.name = name;
        this.bo = bo;
    }

}

加下来事适配器：

package com.example.day_all_button;

import java.util.List;

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.TextView;

public class Adper extends BaseAdapter {
    List<Good> list;
    Context context;

    public Adper(List<Good> list, Context context) {
        // TODO Auto-generated constructor stub
    this.list=list;
    this.context=context;

    }

    public int getCount() {
        // TODO Auto-generated method stub
        return list.size();
    }

    public Object getItem(int position) {
        // TODO Auto-generated method stub
        return list.get(position);
    }

    public long getItemId(int position) {
        // TODO Auto-generated method stub
        return position;
    }

    public View getView(final int position, View convertView, ViewGroup parent) {
        // TODO Auto-generated method stub
        final ViewHolder viewHolder;
        if(convertView==null){
            convertView=View.inflate(context, R.layout.item, null);
         viewHolder=new ViewHolder();
         viewHolder.textView=(TextView) convertView.findViewById(R.id.text);
        viewHolder.checkBox=(CheckBox) convertView.findViewById(R.id.checkbox);
        convertView.setTag(viewHolder);
        }else{
            viewHolder=(ViewHolder) convertView.getTag();
        }
        viewHolder.textView.setText("价格："+list.get(position).getName());

        //显示checkBox
        viewHolder.checkBox.setChecked(list.get(position).getBo());

        return convertView;

    }
class ViewHolder{
    TextView textView;
    CheckBox checkBox;
}
}

适配器的xml：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >
   <TextView
       android:id="@+id/text"
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:text="ddd"

       />

   <CheckBox
       android:id="@+id/checkbox"
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"

        android:focusable="false"
        android:clickable="false"

       android:layout_alignParentRight="true"
       android:layout_alignParentTop="true" />

</RelativeLayout>