listview check

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 {
	private ArrayList list;
	// 用来控制CheckBox的选中状况
	private static HashMap isSelected;
	private Context context;
	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) {
			holder = new ViewHolder();
			convertView = inflater.inflate(R.layout.item, null);
			holder.tv = (TextView) convertView.findViewById(R.id.item_tv);
			holder.cb = (CheckBox) convertView.findViewById(R.id.item_cb);
			convertView.setTag(holder);
		} else {
			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;
	}

}

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

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;

public class MainAct 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
	private TextView header;
	Set headerList = null;
	HashMap map = new HashMap();

	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		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);
		header = (TextView) findViewById(R.id.header);
		
		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();

			}
		});
		// 取消按钮的回调接口
		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();

			}
		});

		// 反选按钮的回调接口
		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();
			}
		});

		// 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++; 
					map.put(arg2, holder.tv.getText().toString());
				} else {
					checkNum--;
					map.remove(arg2);
				}
				headerList = map.keySet();
				for(Iterator it = headerList.iterator(); it.hasNext();){
					int ii = it.next();
					Log.i("main", "---" + map.size() + ", " + ii + ", " + map.get(ii));
				}
				// 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");
	}

}