android 2级listview的实现

android开发中，会遇见分类下面还有小分类的情况，这个可以很简单的用ExpandableListView来实现.

截图如下：

实现代码：主界面,main.java

package com.expandablelistview;

import java.util.ArrayList;
import java.util.List;

import com.hck.adpter.AllAdpter;


import android.app.Activity;
import android.os.Bundle;
import android.widget.ExpandableListView;

public class MainActivity extends Activity {
    private AllAdpter adpter;  //绑定数据的adpter
	private ExpandableListView listView; //控件
	private ArrayList fatherList;   //放置父类数据
	private List> childList;  //子类数据
	private List list;   //中间数据保存量
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		listView = (ExpandableListView) findViewById(R.id.all);  //获取控件对象
		initDate(); //初始化数据
		setAdpter();  //绑定数据
	}
	private void initDate() {
		fatherList=new ArrayList();
		childList=new ArrayList>();
		/**
		 * 初始化父listview
		 */
			fatherList.add("搞笑");
			fatherList.add("原创");
			fatherList.add("娱乐");
			fatherList.add("资讯");
			fatherList.add("汽车");
			fatherList.add("体育");
		/**
		 * 初始化子listview
		 */
		for (int i = 0; i < fatherList.size(); i++) {
			initChild(i);  //为每一个父类增加子类数据
		}
	}

	private void initChild(int id) {
		list=new ArrayList();
		switch (id) {
		case 0:
			list.add("疯狂搞笑");
			list.add("搞笑综艺");
			list.add("原创搞笑");
			list.add("经典搞笑");
		  childList.add(list);
			break;
    case 1:
    	list.add("原创影视");
		list.add("音乐动画");
		list.add("火星搞笑");
		list.add("网络红人");
	  childList.add(list);
	  break;
    case 2:
    	list.add("明星八卦");
		list.add("影视资讯");
	  childList.add(list);
	  break;
    case 3:
    	list.add("社会");
		list.add("国内");
	  childList.add(list);
		default:
			break;
		}
	}
	private void setAdpter()  //绑定数据
	{
		if (adpter==null) {
			 adpter = new AllAdpter(fatherList, childList, this);
			 listView.setAdapter(adpter);
		}
		
		
	}

}

适配器：AllAdpter

package com.hck.adpter;

import java.util.List;

import android.content.Context;
import android.content.Intent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.TextView;
import android.widget.Toast;

import com.expandablelistview.R;

public class AllAdpter extends BaseExpandableListAdapter {
    public List father;
	public List> chilerd;
	private Context context;

	public AllAdpter(List faList, List> chList,
			Context context) {  //初始化数据
		this.father = faList;
		this.chilerd = chList;
		this.context = context;
	}

	@Override
	public Object getChild(int groupPosition, int childPosition) {
		return chilerd.get(groupPosition).get(childPosition);   //获取父类下面的每一个子类项
	}

	@Override
	public long getChildId(int groupPosition, int childPosition) {
		return childPosition;  //子类位置
	}

	@Override
	public View getChildView(int groupPosition, int childPosition,
			boolean isLastChild, View convertView, ViewGroup parent) { //显示子类数据的iew
		View view = null;
		view = LayoutInflater.from(context).inflate(
				R.layout.all_expand_list_item, null);
		TextView textView = (TextView) view
				.findViewById(R.id.all_list_text_item_id);
		textView.setText(chilerd.get(groupPosition).get(childPosition));
		return view;
	}

	@Override
	public int getChildrenCount(int groupPosition) {
		return chilerd.get(groupPosition).size();  //子类item的总数
	}

	@Override
	public Object getGroup(int groupPosition) {   //父类数据
		return father.get(groupPosition);
	}

	@Override
	public int getGroupCount() {
		return father.size();  ////父类item总数
	}

	@Override
	public long getGroupId(int groupPosition) {
		return groupPosition;   //父类位置
	}

	@Override
	public View getGroupView(int groupPosition, boolean isExpanded,
			View convertView, ViewGroup parent) {
		View view = LayoutInflater.from(context).inflate(
				R.layout.all_expand_list, null);
		TextView textView = (TextView) view.findViewById(R.id.all_list_text_id);
		textView.setText(father.get(groupPosition));
		return view;
	}

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

	@Override
	public boolean isChildSelectable(int groupPosition, int childPosition) {  //点击子类触发事件
		Toast.makeText(context,
				"第" + groupPosition + "大项，第" + childPosition + "小项被点击了",
				Toast.LENGTH_LONG).show();
		return true;

	}

}

xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:background="#EBEBEB"
    >
<TextView
     android:gravity="center_vertical"
    android:paddingLeft="25dp"
    android:textColor="#000000"
    android:layout_width="fill_parent"
    android:layout_height="45dp"
    android:textSize="16sp"
    android:id="@+id/all_list_text_item_id"
    />
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >
    
<TextView
    android:gravity="center_vertical"
    android:textColor="#000000"
    android:paddingLeft="3dp"
    android:layout_width="fill_parent"
    android:layout_height="35dp"
    android:textSize="20sp"
    android:id="@+id/all_list_text_id"
    />
</LinearLayout>

<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"
    android:background="#ffffff"
     >

   <ExpandableListView
        android:paddingLeft="3dp"
        android:cacheColorHint="#00000000"
        android:groupIndicator="@null"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:id="@+id/all"
        />
</RelativeLayout>