android的ExpandableListView

activity_main.xml

<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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.expandablelistview.MainActivity" >

    <ExpandableListView 
        android:id="@+id/ExpandableListView1_1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
       android:layout_alignParentLeft="true"
       android:layout_alignParentTop="true"
       android:groupIndicator="@null"
        
                >
        
    </ExpandableListView>

</RelativeLayout>
<!--  android:groupIndicator="@null"去掉自带的箭头图标 -->

group_item.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="wrap_content"
    android:orientation="horizontal" >
    
    <ImageView
        android:id="@+id/p_w_picpathViewgroup_1" 
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/ic_launcher"
        />
    
	<TextView 
	    android:id="@+id/textViewgroup_1"
	    android:layout_width="wrap_content"
	    android:layout_height="wrap_content"
	  
	    />
</LinearLayout>

child_item.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="wrap_content"
    android:orientation="horizontal" >
    
    
     <ImageView
        android:id="@+id/p_w_picpathViewchild_1" 
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/ic_launcher"
        android:padding="10dp"
        />
    
	<TextView 
	    android:id="@+id/textViewchild_1"
	    android:layout_width="wrap_content"
	    android:layout_height="wrap_content"
	    android:text="sdfds"
	    android:padding="10dp"
	  
		/>
</LinearLayout>

MainActivity

package com.example.expandablelistview;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.ExpandableListView;
import android.widget.ImageView;
import android.widget.TextView;

public class MainActivity extends Activity {
	private ExpandableListView expandableListView;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		expandableListView=(ExpandableListView) findViewById(R.id.ExpandableListView1_1);
		expandableListView.setAdapter(new MyExpandableListAdapter());
	}

	@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;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		// Handle action bar item clicks here. The action bar will
		// automatically handle clicks on the Home/Up button, so long
		// as you specify a parent activity in AndroidManifest.xml.
		int id = item.getItemId();
		if (id == R.id.action_settings) {
			return true;
		}
		return super.onOptionsItemSelected(item);
	}
	
	class MyExpandableListAdapter extends BaseExpandableListAdapter{
		private String[] skills = new String[]{
	            "WORD", "EXCEL", "EMAIL", "PPT"
	    };
		private String[][] groups = new String[][]{
		            {"文档编辑", "文档排版", "文档处理", "文档打印"},
		            {"表格编辑", "表格排版", "表格处理", "表格打印"},
		            {"收发邮件", "管理邮箱", "登录登出", "注册绑定"},
		            {"演示编辑", "演示排版", "演示处理", "演示打印"},
		    };
		@Override
		public int getGroupCount() {
			// TODO Auto-generated method stub
			return skills.length;
		}
		//二级列表的数量
		@Override
		public int getChildrenCount(int groupPosition) {
			// TODO Auto-generated method stub
			return groups[groupPosition].length;
		}
		//返回每一组的对象
		@Override
		public Object getGroup(int groupPosition) {
			// TODO Auto-generated method stub
			return skills[groupPosition];
		}
		//返回每组中的列表项
		@Override
		public Object getChild(int groupPosition, int childPosition) {
			// TODO Auto-generated method stub
			return groups[groupPosition][childPosition];
		}

		@Override
		public long getGroupId(int groupPosition) {
			// TODO Auto-generated method stub
			return groupPosition;
		}

		@Override
		public long getChildId(int groupPosition, int childPosition) {
			// TODO Auto-generated method stub
			return childPosition;
		}

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

		@Override
		public View getGroupView(int groupPosition, boolean isExpanded,
				View convertView, ViewGroup parent) {
			// TODO Auto-generated method stub
			if(convertView==null){
				convertView=getLayoutInflater().inflate(R.layout.group_item, null);
				
			}
			ImageView p_w_picpathView=(ImageView) convertView.findViewById(R.id.p_w_picpathViewgroup_1);
			TextView textView=(TextView) convertView.findViewById(R.id.textViewgroup_1);
			p_w_picpathView.setImageResource(R.drawable.ic_launcher);
			textView.setText(skills[groupPosition]);
			return convertView;
		}

		@Override
		public View getChildView(int groupPosition, int childPosition,
				boolean isLastChild, View convertView, ViewGroup parent) {
			// TODO Auto-generated method stub
			if(convertView==null){
				convertView=getLayoutInflater().inflate(R.layout.child_item, null);
				ImageView p_w_picpathView=(ImageView) convertView.findViewById(R.id.p_w_picpathViewchild_1);
				TextView textView=(TextView) convertView.findViewById(R.id.textViewchild_1);
				p_w_picpathView.setImageResource(R.drawable.ic_launcher);
				textView.setText(groups[groupPosition][childPosition]);
			}
			return convertView;
		}

		@Override
		public boolean isChildSelectable(int groupPosition, int childPosition) {
			// TODO Auto-generated method stub
			return true;
		}
		
	}
}