CheckBox与ListView的结合方法一

    最近这段时间比较闲，每天都无所事事。不再想重复这样的生活，于是申请了新的ITeye博客，给自己一个新的开始。今天是第一天写博客。
    在Android下，ListView是使用较为频繁的一个组件，经常和很多其他组件结合完成很多功能。下面是本人使用的方法之一，以后会陆续编写其他的结合方法。可能有些人认为没必要，但是本人做过一段时间讲师，再有就是打发无聊的日子，所以有时间就倒腾倒腾。不再废话了，代码如下：

    

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

public class ListViewOfCheCheckBoxActivity extends Activity {
	private static final String TAG = ListViewOfCheCheckBoxActivity.class
			.getName();
	private ListView listView;
	private String items[] = { "Java编程思想", "程序员修炼之道", "JUnit实践","UML实践","Mysql","Oracle","PowerDesigner","PowerBuilder","Eclipse","Netbeans", "极限编程之我行",
			"Java网络编程", "Java并发编程", "Java算法", "性能分析","压力测试","软件工程","线性代数","微积分","离散数学","统计学","VM概述","操作系统原理","C语言","Spring","Hibernate","Spring MVC","Groovy","Grails","Struts2","Seam","JYpthon" };

	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		final TextView messageTV = (TextView) findViewById(R.id.messageTV);
		Button printSelectedCheckBoxButton = (Button) findViewById(R.id.printSelectedCheckBoxButton);
		listView = (ListView) findViewById(R.id.simpleListViewOfCheckBox);
		listView.setAdapter(new ArrayAdapter<String>(this,
				android.R.layout.simple_list_item_multiple_choice, items));
		listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
		
		
		printSelectedCheckBoxButton.setOnClickListener(new OnClickListener() {			
			@Override
			public void onClick(View v) {				
				StringBuilder sb = new StringBuilder();
				SparseBooleanArray selectedtems = listView.getCheckedItemPositions();
				int selectItemCounts = selectedtems.size();
				sb.append("节点总数：").append(items.length).append("、选中节点数：").append(selectItemCounts).append("。选中的节点有：");
				
				for(int i=0;i<selectItemCounts;i++){					
					if(selectedtems.valueAt(i)){
						int index = selectedtems.keyAt(i);
						sb.append(index).append(" -> ").append(items[index]);
						if(i<selectItemCounts -1){
							sb.append("、");
						}
						String selectedItem =(String) listView.getAdapter().getItem(index);
						Log.i(TAG, "选中的对象是："+selectedItem);
						
					}
				}
                             selectedtems.clear();//需要清除以前的选中节点，否则选中节点数会不断累加下去，供下载的代码力没有这行代码，对不住了！


				messageTV.setText(sb.toString());

			}
		});
	}
}

布局较为简单，只是为了输出选中的值

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
	android:orientation="vertical" android:layout_width="fill_parent"
	android:layout_height="fill_parent">
	<TextView android:id="@+id/messageTV" android:layout_width="fill_parent"
		android:layout_height="wrap_content" android:text="@string/hello" />
	<Button android:text="打印选中的复选框" android:id="@+id/printSelectedCheckBoxButton"
		android:layout_width="wrap_content" android:layout_height="wrap_content"></Button>
	<ListView android:id="@+id/simpleListViewOfCheckBox"
		android:layout_height="wrap_content" android:layout_width="match_parent"></ListView>

</LinearLayout>