checkbox的单选全选，反选，计算价格，删除

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:text="反 选"
         android:layout_weight="1"
        />
    <Button
        android:id="@+id/button3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="全不选"
         android:layout_weight="1"
        />
    <Button
        android:id="@+id/button4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="删除"
         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>

　

listveiw.xml

如果ListView的Item中包含CheckBox，由于CheckBox的焦点优先级高于ListView，所以当选中ListView时，ListView将不会有选中的状态，解决的方法就是在checkbox组件中加一属性：android:focusable="false"

　

<?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>

　　MainActivity.java

package com.bawei.day04_listview;

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

import com.bawei.day04_listview.Adper.ViewHolder;
import com.bawei.vo.Good;

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 {

    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;
    private Button button4;
    private List<Good> li;
    @Override
    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
        button4 = (Button) findViewById(R.id.button4);//删除
        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 < 60; i++) {
            list.add(new Good(i+"", false));
        }
        //适配
        adapter = new Adper(list,MainActivity.this);
        listView.setAdapter(adapter);
        //全选
        button1.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {
                // TODO Auto-generated method stub

                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");

            }
        });
        //反选
        button2.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {
                // TODO Auto-generated method stub
                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");
            }
        });
        //全不选
        button3.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {
                // TODO Auto-generated method stub
                 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");
            }
        });
        //删除1
        /*li = new ArrayList<Good>();
        button4.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {
                // TODO Auto-generated method stub
                for (int i = 0; i < list.size(); i++) {
                    if(list.get(i).getBo()){
                        //把要删除的保存起来
                    li.add(list.get(i));

                    }

                }
                //删除
                list.removeAll(li);
                adapter.notifyDataSetChanged();
                 num = 0;
                 pric = 0;
                price.setText("一共选了"+num+"件,"+"价格是"+pric+"元");
            }
        });*/
        //删除2
        button4.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {
                // TODO Auto-generated method stub
                //获取list集合对应的迭代器
                Iterator it=list.iterator();
                while (it.hasNext()) {
                    //得到对应集合元素
                    Good g=(Good) it.next();
                    //判断
                    if(g.getBo()){
                        //从集合中删除上一次next方法返回的元素
                        it.remove();
                    }
                }
                //刷新
                adapter.notifyDataSetChanged();
                 num = 0;
                 pric = 0;
                 //显示
                price.setText("一共选了"+num+"件,"+"价格是"+pric+"元");
            }
        });
        // 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");
            }
        });

    }

}

　　List的Vo类Good.java

package com.bawei.vo;

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;
}
@Override
public String toString() {
    return "Good [name=" + name + ", bo=" + bo + "]";
}
public Good(String name, boolean bo) {
    super();
    this.name = name;
    this.bo = bo;
}
public Good() {
    super();
}

}

　　适配Adper.java

package com.bawei.day04_listview;

import java.util.List;

import com.bawei.vo.Good;

import android.content.Context;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
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 null;
    }

    public long getItemId(int position) {
        // TODO Auto-generated method stub
        return 0;
    }

    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.listveiw, 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;
}
}