ExpandableListView使用示例

MainActivity如下:

package cn.testexpandablelistview1;
import android.os.Bundle;
import android.view.View;
import android.widget.BaseExpandableListAdapter;
import android.widget.CheckBox;
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;
import android.app.Activity;
/**
 * Demo描述:
 * ExpandableListView的基本使用
 * 
 * 注意:
 * 布局文件中android:groupIndicator="@null"
 * 去掉ExpandableListView的箭头图标
 */
public class MainActivity extends Activity {
    private ExpandableListView mExpandableListView;
    private ExpandableListAdapter mExpandableListviewAdapter;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		init();
	}
	private void init(){
		mExpandableListView=(ExpandableListView) findViewById(R.id.expandableListView);
		mExpandableListviewAdapter = new ExpandableListAdapter(MainActivity.this);
		mExpandableListView.setAdapter(mExpandableListviewAdapter);
		//为ExpandableListview监听子项单击事件
		mExpandableListView.setOnChildClickListener(new OnChildClickListenerImpl());
		//为ExpandableListview监听组项单击事件
		mExpandableListView.setOnGroupClickListener(new OnGroupClickListenerImpl());
		//为ExpandableListview监听关闭分组事件
		mExpandableListView.setOnGroupCollapseListener(new OnGroupCollapseListenerImpl());
		//为ExpandableListview监听展开分组事件	
		mExpandableListView.setOnGroupExpandListener(new OnGroupExpandListenerImpl());			
	}
	
	// 监听子项点击事件
	class OnChildClickListenerImpl implements OnChildClickListener {
		@Override
		public boolean onChildClick(ExpandableListView parent, View v,int groupPosition, int childPosition, long id) {
			// 组的数量
			int gourpsSum = mExpandableListviewAdapter.getGroupCount();
			for (int i = 0; i < gourpsSum; i++) {
				// 每组中子项的数量
				int childSum = mExpandableListviewAdapter.getChildrenCount(i);
				for (int k = 0; k < childSum; k++) {
					boolean isLastChild = false;
					if (k == (childSum - 1)) {
						isLastChild = true;
					}

					View childView=mExpandableListviewAdapter.getChildView(i, k, isLastChild, null, null);
					CheckBox checkBox = (CheckBox) childView.findViewById(R.id.checkBox);
					// 切换CheckBox状态!!!
					checkBox.toggle();
					boolean itemIsCheck = checkBox.isChecked();
					TextView textView = (TextView) childView.findViewById(R.id.textView);
					String gameName = textView.getText().toString();
					// 实现单选
					if (i == groupPosition && k == childPosition) {
						ExpandableListAdapter.statusHashMap.put(gameName, itemIsCheck);
					} else {
						ExpandableListAdapter.statusHashMap.put(gameName, false);
					}
					// 通知数据发生变化
					((BaseExpandableListAdapter) mExpandableListviewAdapter).notifyDataSetChanged();
				}
			}
			return true;
		}
	}

	// 组被点击事件
	class OnGroupClickListenerImpl implements OnGroupClickListener {
		@Override
		public boolean onGroupClick(ExpandableListView parent, View v,int groupPosition, long id) {
			return false;
		}
	}
	// 组收缩事件
	class OnGroupCollapseListenerImpl implements OnGroupCollapseListener {
		@Override
		public void onGroupCollapse(int groupPosition) {
		}
	}
	// 打开组事件
	class OnGroupExpandListenerImpl implements OnGroupExpandListener {
		@Override
		public void onGroupExpand(int groupPosition) {
		}
	}
	

}

ExpandableListAdapter如下:

package cn.testexpandablelistview1;

import java.util.HashMap;
import android.content.Context;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.BaseExpandableListAdapter;
import android.widget.CheckBox;
import android.widget.TextView;

public class ExpandableListAdapter extends BaseExpandableListAdapter {
		private Context context = null;
		public String[] groups = { "单价", "颜色" }; 
		public String[][] children = { { "一块", "二块", "三块" },{ "黄色", "绿色", "白色" } }; 
		public static  HashMap<String, Boolean> statusHashMap;
        private TextView childTextView;
        private CheckBox childBox;
		public ExpandableListAdapter(Context context) {
			this.context = context;
			statusHashMap = new HashMap<String, Boolean>();
			// 初始时,让所有的子选项均未被选中
			for (int i = 0; i < children.length; i++) {
				for (int a = 0; a < children[i].length; a++) {
					statusHashMap.put(children[i][a], false);
				}
			}
		}

		// 取得指定的子项
		@Override
		public Object getChild(int groupPosition, int childPosition) { 
			return this.children[groupPosition][childPosition];
		}

		// 取得子项ID
		@Override
		public long getChildId(int groupPosition, int childPosition) { 
			return childPosition;
		}

		//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) {
				LayoutInflater inflater = 
				(LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
				convertView = inflater.inflate(R.layout.expandablelistviewitem, null);
			}
			
			childTextView = (TextView) convertView.findViewById(R.id.textView);
			childTextView.setText(getChild(groupPosition, childPosition).toString());
			childBox = (CheckBox) convertView.findViewById(R.id.checkBox);
			//获取当前子项CheckBox的状态
			Boolean nowStatus = statusHashMap.get(children[groupPosition][childPosition]);
			childBox.setChecked(nowStatus);
			return convertView;
		}

		// 取得子项个数
		@Override
		public int getChildrenCount(int groupPosition) { 
			return this.children[groupPosition].length;
		}

		// 取得组对象
		@Override
		public Object getGroup(int groupPosition) {
			return this.groups[groupPosition];
		}

		// 取得组个数
		@Override
		public int getGroupCount() { 
			return this.groups.length;
		}

		// 取得组ID
		@Override
		public long getGroupId(int groupPosition) { 
			return groupPosition;
		}

		// 取得组显示组件
		@Override
		public View getGroupView(int groupPosition, boolean isExpanded,View convertView, ViewGroup parent) {
			// 建立TextView组件
			TextView textView = buildTextView(); 
			// 设置文字
			textView.setText(this.getGroup(groupPosition).toString());
			return textView;
		}

		@Override
		public boolean hasStableIds() {
			return true;
		}

		@Override
		public void notifyDataSetChanged() {
			super.notifyDataSetChanged();
		}

		@Override
		public boolean isChildSelectable(int groupPosition, int childPosition) {
			return true;
		}
		
		// 建立TextView,用于显示组
		public TextView buildTextView() { 
			AbsListView.LayoutParams param = new AbsListView.LayoutParams
		    (ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.FILL_PARENT);
			TextView textView = new TextView(this.context);
			textView.setLayoutParams(param);
			textView.setTextSize(25.0f);
			textView.setGravity(Gravity.LEFT);
			textView.setPadding(40, 8, 3, 3);
			return textView;
		}
	}

main.xml如下:

<RelativeLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <ExpandableListView
        android:id="@+id/expandableListView"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:groupIndicator="@null"
     />

</RelativeLayout>

expandablelistviewitem.xml如下:

<?xml version="1.0" encoding="utf-8"?>
<!-- 注意： 将复选框设置为不可点击，不可在触摸时点击，不可获得焦点 -->
<LinearLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal" >
    <TextView 
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="60dip"
    />
   <CheckBox
       android:id="@+id/checkBox"
       android:layout_width="fill_parent"
       android:layout_height="wrap_content"
       android:clickable="false"
       android:focusable="false"
       android:focusableInTouchMode="false"
       android:layout_marginLeft="100dip"
    />  
</LinearLayout>