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MainActivity如下:

import java.util.HashMap;import android.app.Activity;import android.content.Context;import android.os.Bundle;import android.view.ContextMenu;import android.view.Gravity;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.view.ContextMenu.ContextMenuInfo;import android.widget.AbsListView;import android.widget.BaseExpandableListAdapter;import android.widget.CheckBox;import android.widget.ExpandableListAdapter;import android.widget.ExpandableListView;import android.widget.TextView;import android.widget.ExpandableListView.OnChildClickListener;import android.widget.ExpandableListView.OnGroupClickListener;import android.widget.ExpandableListView.OnGroupCollapseListener;import android.widget.ExpandableListView.OnGroupExpandListener;public class ExpandableListViewTestActivity extends Activity {	private ExpandableListView elistview = null; // 定义树型组件	private ExpandableListAdapter adapter = null; // 定义适配器对象	CheckBox childBox;	TextView childTextView;	private HashMap
   
     statusHashMap;	View childItem = null;	@Override	public void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		super.setContentView(R.layout.main); // 默认布局管理器		this.elistview = (ExpandableListView) super.findViewById(R.id.elistview); // 取得组件		this.adapter = new MyExpandableListAdapter(this); // 实例化适配器		this.elistview.setAdapter(this.adapter); // 设置适配器		this.elistview.setOnChildClickListener(new OnChildClickListenerImpl()); // 设置子项单击事件		this.elistview.setOnGroupClickListener(new OnGroupClickListenerImpl());// 设置组项单击事件		this.elistview.setOnGroupCollapseListener(new OnGroupCollapseListenerImpl());// 关闭分组事件		this.elistview.setOnGroupExpandListener(new OnGroupExpandListenerImpl()); // 展开分组事件	}	private class OnChildClickListenerImpl implements OnChildClickListener {// 监听子项点击事件		@Override		public boolean onChildClick(ExpandableListView parent, View v,int groupPosition, int childPosition, long id) {						int gourpsSum = adapter.getGroupCount();//组的数量			for(int i = 0; i < gourpsSum; i++) {				int childSum = adapter.getChildrenCount(i);//组中子项的数量				for(int k = 0; k < childSum;k++) {					boolean isLast = false;					if (k == (childSum - 1)){ 						isLast = true;					}										CheckBox cBox = (CheckBox) adapter.getChildView(i, k, isLast, null, null).findViewById(R.id.checkBox);					cBox.toggle();//切换CheckBox状态！！！！！！！！！！					boolean itemIsCheck=cBox.isChecked();					TextView tView=(TextView) adapter.getChildView(i, k, isLast, null, null).findViewById(R.id.textView);					String gameName=tView.getText().toString();					if (i == groupPosition && k == childPosition) {						statusHashMap.put(gameName, itemIsCheck);					} else {						 statusHashMap.put(gameName, false);					}					((BaseExpandableListAdapter) adapter).notifyDataSetChanged();//通知数据发生了变化				}							}							return true;		}	}	private class OnGroupClickListenerImpl implements OnGroupClickListener {// 组被点击事件		@Override		public boolean onGroupClick(ExpandableListView parent, View v,int groupPosition, long id) {			return false;		}	}	private class OnGroupCollapseListenerImpl implements OnGroupCollapseListener {// 组收缩事件		@Override		public void onGroupCollapse(int groupPosition) {		}	}	private class OnGroupExpandListenerImpl implements OnGroupExpandListener {// 打开组事件		@Override		public void onGroupExpand(int groupPosition) {		}	}	@Override	public void onCreateContextMenu(ContextMenu menu, View view,ContextMenuInfo menuInfo) {// 处理长按事件	}	// 自定义适配器！！！！	private class MyExpandableListAdapter extends BaseExpandableListAdapter {		private Context context = null;		public String[] groups = { "扑克", "麻将" }; // 组名称		public String[][] children = { { "斗地主", "炸金花", "推火车" },{ "四川麻将", "北京麻将", "湖南麻将" } }; // 定义子选项		public MyExpandableListAdapter(Context context) {			this.context = context;			statusHashMap = new HashMap
    
     ();			for (int i = 0; i < children.length; i++) {// 初始时,让所有的子选项均未被选中				for (int a = 0; a < children[i].length; a++) {					statusHashMap.put(children[i][a], false);				}			}		}		@Override		public Object getChild(int groupPosition, int childPosition) { // 取得指定的子项			return this.children[groupPosition][childPosition];		}		@Override		public long getChildId(int groupPosition, int childPosition) { // 取得子项ID			return childPosition;		}		public TextView buildTextView() { // 自定义方法，建立文本.用于显示组			AbsListView.LayoutParams param = new AbsListView.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, 35); // 指定布局参数			TextView textView = new TextView(this.context); // 创建TextView			textView.setLayoutParams(param); // 设置布局参数			textView.setTextSize(14.0f); // 设置文字大小			textView.setGravity(Gravity.LEFT); // 左对齐			textView.setPadding(40, 8, 3, 3); // 间距			return textView; // 返回组件		}		//点击事件发生后:先执行事件监听,然后调用此getChildView()		@Override		public View getChildView(int groupPosition, int childPosition,boolean isLastChild, View convertView, ViewGroup parent) {// 返回子项组件			if (convertView == null) {// 第一次的时候convertView是空,所以要生成convertView				LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);				convertView = inflater.inflate(R.layout.item, null);			}						childTextView = (TextView) convertView.findViewById(R.id.textView);			childTextView.setText(getChild(groupPosition, childPosition).toString());			childBox = (CheckBox) convertView.findViewById(R.id.checkBox);			Boolean nowStatus = statusHashMap.get(children[groupPosition][childPosition]);//当前状态			childBox.setChecked(nowStatus);			return convertView;		}		@Override		public int getChildrenCount(int groupPosition) { // 取得子项个数			return this.children[groupPosition].length;		}		@Override		public Object getGroup(int groupPosition) { // 取得组对象			return this.groups[groupPosition];		}		@Override		public int getGroupCount() { // 取得组个数			return this.groups.length;		}		@Override		public long getGroupId(int groupPosition) { // 取得组ID			return groupPosition;		}		@Override		public View getGroupView(int groupPosition, boolean isExpanded,View convertView, ViewGroup parent) {// 取得组显示组件			TextView textView = buildTextView(); // 建立组件			textView.setText(this.getGroup(groupPosition).toString()); // 设置文字			return textView;		}		@Override		public boolean hasStableIds() {			return true;		}		@Override		public void notifyDataSetChanged() {//通知数据发生变化			super.notifyDataSetChanged();		}		@Override		public boolean isChildSelectable(int groupPosition, int childPosition) {			return true;		}	}}
    
   

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