Android 带checkbox的listView 实现多选，全选，反选

由于listview的一些特性，刚开始写这种需求的功能的时候都会碰到一些问题，重点就是存储每个checkbox的状态值，在这里分享出了完美解决方法：

布局文件：

 

 

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：

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>

Activity:

public class Ex_checkboxActivity extends Activity {
    private ListView lv;
    private MyAdapter mAdapter;
    private ArrayList 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();
        // 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");
    };
}

列表适配器：

 

 
       
       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 list;   
           // 用来控制CheckBox的选中状况   
           private static HashMap isSelected;   
           // 上下文   
           private Context context;   
           // 用来导入布局   
           private LayoutInflater inflater = null;   
          
           // 构造器   
           public MyAdapter(ArrayList list, Context context) {   
               this.context = context;   
               this.list = list;   
               inflater = LayoutInflater.from(context);   
               isSelected = new HashMap();   
               // 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 getIsSelected() {   
               return isSelected;   
           }   
          
           public static void setIsSelected(HashMap isSelected) {   
               MyAdapter.isSelected = isSelected;   
           }   
          
           public static class ViewHolder {   
               TextView tv;   
               CheckBox cb;   
           }   
       }
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 list;
    // 用来控制CheckBox的选中状况
    private static HashMap isSelected;
    // 上下文
    private Context context;
    // 用来导入布局
    private LayoutInflater inflater = null;

    // 构造器
    public MyAdapter(ArrayList list, Context context) {
        this.context = context;
        this.list = list;
        inflater = LayoutInflater.from(context);
        isSelected = new HashMap();
        // 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 getIsSelected() {
        return isSelected;
    }

    public static void setIsSelected(HashMap isSelected) {
        MyAdapter.isSelected = isSelected;
    }

    public static class ViewHolder {
        TextView tv;
        CheckBox cb;
    }
}

转载于:https://www.cnblogs.com/tianshidechibang234/p/3441106.html