Android:ExpandableListView使用

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 = new ArrayList<ParentObj>();

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		createGroupData();
		
		createChildData();
		
		expandableListView = (ExpandableListView) findViewById(R.id.expandable_list_view_id);
		customerAdapter = new CustomerAdapter(listData, this);
		expandableListView.setAdapter(customerAdapter);
		expandableListView.setGroupIndicator(null);
		
		expandableListView.setOnGroupExpandListener(new OnGroupExpandListener() {
			
			@Override
			public void onGroupExpand(int groupPosition) {
				for (int i = 0; i < customerAdapter.getGroupCount(); i ++) {
					if (i != groupPosition) {
						expandableListView.collapseGroup(i);
					}
				}
			}
		});
		
		expandableListView.setOnChildClickListener(new OnChildClickListener() {
			
			@Override
			public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) {
				Toast.makeText(MainActivity.this, listData.get(groupPosition).getChilds().get(childPosition).getcName(), Toast.LENGTH_LONG).show();
				return true;
			}
		});
	}

	private void createGroupData() {
		ParentObj p1 = new ParentObj();
		p1.setpName("HP");
		listData.add(p1);

		ParentObj p2 = new ParentObj();
		p2.setpName("DELL");
		listData.add(p2);

		ParentObj p3 = new ParentObj();
		p3.setpName("Lenovo");
		listData.add(p3);

		ParentObj p4 = new ParentObj();
		p4.setpName("Sony");
		listData.add(p4);

		ParentObj p5 = new ParentObj();
		p5.setpName("HCL");
		listData.add(p5);

		ParentObj p6 = new ParentObj();
		p6.setpName("Samsung");
		listData.add(p6);
	}

	private void createChildData() {
		// preparing laptops collection(child)
		String[] hpModels = { "HP Pavilion G6-2014TX", "ProBook HP 4540", "HP Envy 4-1025TX" };
		String[] hclModels = { "HCL S2101", "HCL L2102", "HCL V2002" };
		String[] lenovoModels = { "IdeaPad Z Series", "Essential G Series", "ThinkPad X Series", "Ideapad Z Series" };
		String[] sonyModels = { "VAIO E Series", "VAIO Z Series", "VAIO S Series", "VAIO YB Series" };
		String[] dellModels = { "Inspiron", "Vostro", "XPS" };
		String[] samsungModels = { "NP Series", "Series 5", "SF Series" };
		
		for (ParentObj p : listData) {
			if (p.getpName().equals("HP")) {
				ArrayList<ChildObj> clists = new ArrayList<ChildObj>();
				for (int i = 0; i < hpModels.length; i ++) {
					ChildObj cObj = new ChildObj();
					cObj.setcName(hpModels[i]);
					clists.add(cObj);
				}
				p.setChilds(clists);
			} else if (p.getpName().equals("DELL")) {
				ArrayList<ChildObj> clists = new ArrayList<ChildObj>();
				for (int i = 0; i < dellModels.length; i ++) {
					ChildObj cObj = new ChildObj();
					cObj.setcName(dellModels[i]);
					clists.add(cObj);
				}
				p.setChilds(clists);
			} else if (p.getpName().equals("Lenovo")) {
				ArrayList<ChildObj> clists = new ArrayList<ChildObj>();
				for (int i = 0; i < lenovoModels.length; i ++) {
					ChildObj cObj = new ChildObj();
					cObj.setcName(lenovoModels[i]);
					clists.add(cObj);
				}
				p.setChilds(clists);
			} else if (p.getpName().equals("Sony")) {
				ArrayList<ChildObj> clists = new ArrayList<ChildObj>();
				for (int i = 0; i < sonyModels.length; i ++) {
					ChildObj cObj = new ChildObj();
					cObj.setcName(sonyModels[i]);
					clists.add(cObj);
				}
				p.setChilds(clists);
			} else if (p.getpName().equals("HCL")) {
				ArrayList<ChildObj> clists = new ArrayList<ChildObj>();
				for (int i = 0; i < hclModels.length; i ++) {
					ChildObj cObj = new ChildObj();
					cObj.setcName(hclModels[i]);
					clists.add(cObj);
				}
				p.setChilds(clists);
			} else {
				ArrayList<ChildObj> clists = new ArrayList<ChildObj>();
				for (int i = 0; i < samsungModels.length; i ++) {
					ChildObj cObj = new ChildObj();
					cObj.setcName(samsungModels[i]);
					clists.add(cObj);
				}
				p.setChilds(clists);
			}
		}
	}
}

class ParentObj {
	private String pName;
	private ArrayList<ChildObj> childs = new ArrayList<ChildObj>();

	public String getpName() {
		return pName;
	}

	public void setpName(String pName) {
		this.pName = pName;
	}

	public ArrayList<ChildObj> getChilds() {
		return childs;
	}

	public void setChilds(ArrayList<ChildObj> childs) {
		this.childs.clear();
		this.childs.addAll(childs);
	}
}

class ChildObj {
	private String cName;

	public String getcName() {
		return cName;
	}

	public void setcName(String cName) {
		this.cName = cName;
	}
}

源代码