Android ExpandableListView简单例子（附加时间模拟器）-FenGKun

 android中常常要用到ListView，有时也要用到ExpandableListView，如在手机设置中，对于分类有很好的效果，会用ListView的人一定会用ExpandableListView，因为 
 ExpandableListView extends ListView的，下面来看个简单的例子 

运行效果图：

一、创建布局文件main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/LinearLayout1"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_gravity="center"
    android:background="#ccc"
    android:orientation="vertical"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin" >
    <TextView
        android:id="@+id/tvTime"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />

    <ExpandableListView android:id="@+id/expendlist"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
    </ExpandableListView>

</LinearLayout>

二、父控件栏的控件布局title_content.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="horizontal" >
    
    <!-- 标题名 -->
    <TextView android:id="@+id/tvName"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="25sp"/>
    
</LinearLayout>

三、子控件栏的控件布局context_content.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="horizontal"
    android:gravity="center_vertical" >
    
    <!-- 内容图片 -->
    <ImageView android:id="@+id/contextImage"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>
    
    <!-- 内容文本 -->
    <TextView android:id="@+id/contextText"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="20sp"/>

</LinearLayout>

四、在主Activity中，MainActivity.java

package com.example.mytime;

import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;

import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.app.Activity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.ExpandableListView;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {

	/** 现实时间控件 */
	private TextView m_tvTime;
	Handler handler;
	
	/** 可扩展ListView */
	private ExpandableListView m_expandableListView;
	
	/** 标题文本 */
	private List<String> list1 = new ArrayList<String>();
	
	/** 内容文本 */
	private List<String> contextList = new ArrayList<String>();
	
	/** 内容图片 */
	private List<Integer> contextList1 = new ArrayList<Integer>();
	
	/** 文本集合 */
	private List<List<String>> text_list = new ArrayList<List<String>>();
	
	/** 图片集合 */
	private List<List<Integer>> img_list = new ArrayList<List<Integer>>();
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		initUi();
	}

	/**
	 * 初始化数据
	 */
	private void initUi() {
		m_tvTime=(TextView) findViewById(R.id.tvTime);
		startAutoFlowTimer();
		
		// 赋值文本
		list1.add("A");
		list1.add("B");
		list1.add("C");
		
		// 内容文本
		contextList.add("Q");
		contextList.add("W");
		contextList.add("E");
		
		// 文本集合
		text_list.add(contextList);
		text_list.add(contextList);
		text_list.add(contextList);
		
		// 内容图片
		contextList1.add(R.drawable.ic_launcher);
		contextList1.add(R.drawable.ic_launcher);
		contextList1.add(R.drawable.ic_launcher);
		
		// 图片集合
		img_list.add(contextList1);
		img_list.add(contextList1);
		img_list.add(contextList1);
		
		// 可扩展ListView
		m_expandableListView = (ExpandableListView) findViewById(R.id.expendlist);
		MyAdapter myAdapter = new MyAdapter();
		m_expandableListView.setAdapter(myAdapter);
		
	}
	
	/**
	 * 自定义适配器
	 */
	class MyAdapter extends BaseExpandableListAdapter {

		// 子控件的内容
		public Object getChild(int arg0, int arg1) {
			// TODO Auto-generated method stub
			return text_list.get(arg0).get(arg1);
		}

		// 子控件的位置
		public long getChildId(int arg0, int arg1) {
			// TODO Auto-generated method stub
			return arg1;
		}

		// 子控件内的控件赋值
		public View getChildView(int arg0, int arg1, boolean arg2, View arg3,
				ViewGroup arg4) {
			if(arg3 == null) {
				arg3 = LayoutInflater.from(MainActivity.this).inflate(R.layout.context_content, null);
			}
			// 内容图片
			ImageView contextImg = (ImageView) arg3.findViewById(R.id.contextImage);
			contextImg.setImageResource(img_list.get(arg0).get(arg1));
			// 内容文本
			TextView contextText = (TextView) arg3.findViewById(R.id.contextText);
			contextText.setText(text_list.get(arg0).get(arg1));
			
			return arg3;
		}

		// 子控件的个数
		public int getChildrenCount(int arg0) {
			// TODO Auto-generated method stub
			return text_list.get(arg0).size();
		}

		// 父控件的内容
		public Object getGroup(int arg0) {
			// TODO Auto-generated method stub
			return list1.get(arg0);
		}

		// 父控件的个数
		public int getGroupCount() {
			// TODO Auto-generated method stub
			return list1.size();
		}

		// 父控件的位置
		public long getGroupId(int arg0) {
			// TODO Auto-generated method stub
			return arg0;
		}

		// 父控件内的控件赋值
		public View getGroupView(int arg0, boolean arg1, View arg2,
				ViewGroup arg3) {
			if(arg2 == null) {
				arg2 = LayoutInflater.from(MainActivity.this).inflate(R.layout.title_content, null);
			}
			TextView titText = (TextView) arg2.findViewById(R.id.tvName);
			titText.setText(list1.get(arg0));
			return arg2;
		}

		@Override
		public boolean hasStableIds() {
			// TODO Auto-generated method stub
			return true;
		}

		@Override
		public boolean isChildSelectable(int arg0, int arg1) {
			// TODO Auto-generated method stub
			return true;
		}
		
	}
	
	public void startAutoFlowTimer(){
		handler = new Handler() {
			@Override
			public void handleMessage(Message msg) {
				// TODO Auto-generated method stub
				super.handleMessage(msg);
				String times = "";
					times = times();
				if(!m_tvTime.getText().toString().equals(times)) {
					m_tvTime.setText(times);
				}
		        sendEmptyMessageDelayed(1, 1000); 
			}
		};
	    handler.sendEmptyMessage(1);
	}
	
	public String times(){
		SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");       
		Date curDate = new Date(System.currentTimeMillis());//获取当前时间       
		String str = formatter.format(curDate);
		Calendar calendar = Calendar.getInstance(); 
		int week = calendar.get(Calendar.DAY_OF_WEEK);
		switch (week) {
		case 1:
			str = str+" 星期日";
			break;
		case 2:
			str = str+" 星期一";
			break;
		case 3:
			str = str+" 星期二";
			break;
		case 4:
			str = str+" 星期三";
			break;
		case 5:
			str = str+" 星期四";
			break;
		case 6:
			str = str+" 星期五";
			break;
		case 7:
			str = str+" 星期六";
			break;
		default:
			break;
		}
		return str;
	}
	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

}