Android 带checkbox的listView 兑现多选，全选，反选

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;	}}