package com.example.expandtutorial;

import java.util.ArrayList;

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.graphics.Typeface;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.ImageView;
import android.widget.TextView;

public class CustomerAdapter extends BaseExpandableListAdapter{
	private ArrayList<ParentObj> datas;
	private Context context;
	
	public CustomerAdapter(ArrayList<ParentObj> datas, Context context) {
		super();
		this.datas = datas;
		this.context = context;
	}

	@Override
	public int getGroupCount() {
		return datas.size();
	}

	@Override
	public int getChildrenCount(int groupPosition) {
		return datas.get(groupPosition).getChilds().size();
	}

	@Override
	public Object getGroup(int groupPosition) {
		return datas.get(groupPosition);
	}

	@Override
	public Object getChild(int groupPosition, int childPosition) {
		return datas.get(groupPosition).getChilds().get(childPosition);
	}

	@Override
	public long getGroupId(int groupPosition) {
		return groupPosition;
	}

	@Override
	public long getChildId(int groupPosition, int childPosition) {
		return childPosition;
	}

	@Override
	// 是否有稳定的id。跟刷新顺序有关
	public boolean hasStableIds() {
		return false;
	}

	@Override
	public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
		ParentViewHolder pviewHolder;
		
		if (convertView == null) {
			convertView = LayoutInflater.from(context).inflate(R.layout.group_item, parent, false);
			pviewHolder = new ParentViewHolder();
			pviewHolder.pTextView = (TextView) convertView.findViewById(R.id.group_text);
			pviewHolder.pImageView = (ImageView) convertView.findViewById(R.id.group_indicator);
			convertView.setTag(pviewHolder);
		}
		
		pviewHolder = (ParentViewHolder)convertView.getTag();
		pviewHolder.pTextView.setTypeface(null, Typeface.BOLD);
		pviewHolder.pTextView.setText(datas.get(groupPosition).getpName());
		
		if (isExpanded) {
			pviewHolder.pImageView.setImageResource(R.drawable.ic_guide_listview_up);
		} else {
			pviewHolder.pImageView.setImageResource(R.drawable.ic_guide_listview_down);
		}
		
		return convertView;
	}

	@Override
	public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView,
			ViewGroup parent) {
		ChildViewHolder cViewHolder;
		
		if (convertView == null) {
			convertView = LayoutInflater.from(context).inflate(R.layout.child_item, parent, false);
			cViewHolder = new ChildViewHolder();
			cViewHolder.cTextView = (TextView)convertView.findViewById(R.id.child_item);
			cViewHolder.cImageView = (ImageView) convertView.findViewById(R.id.child_delete);
			convertView.setTag(cViewHolder);
		}
		
		cViewHolder = (ChildViewHolder)convertView.getTag();
		cViewHolder.cTextView.setText(datas.get(groupPosition).getChilds().get(childPosition).getcName());
		
		final int gPosition = groupPosition;
		final int cPosition = childPosition;
		cViewHolder.cImageView.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View v) {
				AlertDialog.Builder builder = new AlertDialog.Builder(context);
				builder.setMessage("Do you want to remove?");
				builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
					
					@Override
					public void onClick(DialogInterface dialog, int which) {
						datas.get(gPosition).getChilds().remove(cPosition);
						notifyDataSetChanged();
					}
				});
				builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
					
					@Override
					public void onClick(DialogInterface dialog, int which) {
						dialog.cancel();
					}
				});
				AlertDialog alertDialog = builder.create();
				alertDialog.show();
			}
		});
		
		return convertView;
	}

	@Override
	public boolean isChildSelectable(int groupPosition, int childPosition) {
		return true;
	}
	
	static class ParentViewHolder {
		TextView pTextView;
		ImageView pImageView;
	}
	
	static class ChildViewHolder {
		TextView cTextView;
		ImageView cImageView;
	}
}

Activity

• ExpandableListView须要和自己定义adapter进行绑定，通过setAdapter方法。

• 默认ExpandableListView带了一个指示箭头。我们自己定义布局是不须要这个指示箭头的。能够使用expandableListView.setGroupIndicator(null);方法将其去掉。
• 设置setOnGroupExpandListener，当展开一个特定的group时，关闭其它group。
• 设置setOnChildClickListener，监听孩子点击事件。

package com.example.expandtutorial;

import java.util.ArrayList;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.ExpandableListView;
import android.widget.ExpandableListView.OnChildClickListener;
import android.widget.ExpandableListView.OnGroupExpandListener;
import android.widget.Toast;

public class MainActivity extends Activity {
	private ExpandableListView expandableListView;
	private CustomerAdapter customerAdapter;
	private ArrayList<ParentObj> listData = http://www.mamicode.com/new ArrayList();>
源代码