Android 带checkbox的listView 实现多选，全选，反选

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Demo地址（0分资源）：http://download.csdn.net/detail/onlyonecoder/5154352

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<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");
};
}

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<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;
}
}