Android多级列表ExpandableListView使用实例

      转载请注明出处：http://blog.csdn.net/coder_jone/article/details/39158601 

     为了方便识别和区分，人类习惯将各具特征的事物分为不同的类别。这在很多的手机应用中也得到了体现，如联系人分组、商品分类等等。Android提供了多级列表控件

ExpandableListView来满足开发的需求，接下来我们通过一个具体的实例来看看ExpandableListView的简单使用方法。

首先我们还是来编写一个用于显示的界面，界面布局文件很简单，只包含了一个简单的多级列表控件：

<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"    tools:context=".MainActivity" >    <ExpandableListView        android:id="@+id/activity_main_expandablelistview"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:cacheColorHint="#00000000"        android:groupIndicator="@null"        android:listSelector="#00000000" >    </ExpandableListView></RelativeLayout>

接下来看一下界面代码，在界面中主要是为多级列表设置适配器以及相应处理列表点击事件：

package com.jone.example.expandablelistdemo;import com.jone.example.expandablelistdemo.MyExpandableListViewAdapter.OnChildItemClickListener;import android.app.Activity;import android.os.Bundle;import android.widget.ExpandableListView;import android.widget.Toast;import android.widget.ExpandableListView.OnGroupExpandListener;/** * 多级列表测试界面 *  * @author Jone */public class MainActivity extends Activity implements OnGroupExpandListener, OnChildItemClickListener{private ExpandableListView mExpandableListView;@Overrideprotected void onCreate(Bundle savedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);mExpandableListView = (ExpandableListView) findViewById(R.id.activity_main_expandablelistview);mExpandableListView.setDivider(null);mExpandableListView.setOnGroupExpandListener(this);MyExpandableListViewAdapter adapter = new MyExpandableListViewAdapter(this);mExpandableListView.setAdapter(adapter);adapter.setOnChildItemClickListener(this);}@Overridepublic void onGroupExpand(int groupPosition){for (int i = 0, count = mExpandableListView.getExpandableListAdapter().getGroupCount(); i < count; i++){if (groupPosition != i){// 关闭其他分组mExpandableListView.collapseGroup(i);}}}@Overridepublic void onChildItemClicked(int groupPosition, int childPosition){Toast.makeText(this, "点击了" + groupPosition + "下的" + childPosition, Toast.LENGTH_SHORT).show();}}

针对多级列表控件ExpandableListView Android提供了对应的多级列表适配器类BaseExpandableListAdapter，我们需要编写一个继承自BaseExpandableListAdapter的子类，因为是多级列表这里需要定义两个布局文件，一个用于一级列表另一个用于子列表，接下来我们首先看看一级列表的布局文件代码：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:orientation="vertical" >    <RelativeLayout style="@style/ItemTheme" >        <TextView            android:id="@+id/expandablelistview_groupitem_info"            android:layout_width="wrap_content"            android:layout_height="53dip"            android:layout_alignParentLeft="true"            android:gravity="center_vertical"            android:textColor="#7c7f89"            android:textSize="18sp" />        <ImageView            android:id="@+id/expandablelistview_groupitem_icon"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_alignParentRight="true"            android:layout_centerVertical="true"            android:contentDescription="@string/app_name"            android:src="@drawable/ic_downarrows" />    </RelativeLayout>    <View        android:id="@+id/paylist_item_blank"        style="@style/BlankTheme" /></LinearLayout>

子列表布局如下：

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:id="@+id/paylist_item"    android:layout_width="fill_parent"    android:layout_height="match_parent" >    <RelativeLayout        android:id="@+id/paylist_item_info"        style="@style/ItemTheme" >        <ImageView            android:id="@+id/expandablelistview_groupitem_avatar"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_alignParentLeft="true"            android:layout_centerVertical="true"            android:contentDescription="@string/app_name"            android:src="@drawable/ic_avatar" />        <TextView            android:id="@+id/paylist_item_goldtv"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_centerVertical="true"            android:layout_marginLeft="10dp"            android:layout_toRightOf="@id/expandablelistview_groupitem_avatar"            android:textColor="#a1a3aa"            android:textSize="14sp" />    </RelativeLayout>    <View        android:id="@+id/paylist_item_blank"        style="@style/BlankTheme"        android:layout_below="@+id/paylist_item_info" /></RelativeLayout>

写完布局文件以后，我们开始编写适配器代码：

package com.jone.example.expandablelistdemo;import android.content.Context;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.RelativeLayout;import android.widget.TextView;/** * 多级列表适配器 *  * @author Jone */public class MyExpandableListViewAdapter extends BaseExpandableListAdapter{private String[] mGroupTypes = new String[] { "好友", "陌生人", "黑名单" };private String[][] mGroupMembers = new String[][] { { "好友一", "好友二", "好友三", "好友四", "好友五" }, { "陌生人一", "陌生人二", "陌生人三", "陌生人四", "陌生人五", "陌生人六" },{ "黑名单一", "黑名单二", "黑名单三", "黑名四" } };private LayoutInflater mLayoutInflater;private OnChildItemClickListener mOnChildItemClickListener;public MyExpandableListViewAdapter(Context context){mLayoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);}@Overridepublic int getGroupCount(){return mGroupTypes.length;}@Overridepublic Object getGroup(int groupPosition){return mGroupTypes[groupPosition];}@Overridepublic long getGroupId(int groupPosition){return groupPosition;}@Overridepublic int getChildrenCount(int groupPosition){return mGroupMembers[groupPosition].length;}@Overridepublic Object getChild(int groupPosition, int childPosition){return mGroupMembers[groupPosition][childPosition];}@Overridepublic long getChildId(int groupPosition, int childPosition){return childPosition;}@Overridepublic boolean hasStableIds(){return true;}@Overridepublic View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent){GroupViewHolder groupViewHolder;if (convertView == null){groupViewHolder = new GroupViewHolder();convertView = mLayoutInflater.inflate(R.layout.groupitem, null);groupViewHolder.mGroupInfo = (TextView) convertView.findViewById(R.id.expandablelistview_groupitem_info);groupViewHolder.mGroupIcon = (ImageView) convertView.findViewById(R.id.expandablelistview_groupitem_icon);convertView.setTag(groupViewHolder);}else{groupViewHolder = (GroupViewHolder) convertView.getTag();}if (isExpanded)groupViewHolder.mGroupIcon.setImageResource(R.drawable.ic_uparrows);elsegroupViewHolder.mGroupIcon.setImageResource(R.drawable.ic_downarrows);groupViewHolder.mGroupInfo.setText(mGroupTypes[groupPosition]);return convertView;}private final class GroupViewHolder{TextView mGroupInfo;ImageView mGroupIcon;}@Overridepublic View getChildView(final int groupPosition, final int childPosition, boolean isLastChild, View convertView, ViewGroup parent){ChildViewHolder viewHolder;if (convertView == null){viewHolder = new ChildViewHolder();convertView = mLayoutInflater.inflate(R.layout.childitem, null);viewHolder.mChildInfoItem = (RelativeLayout) convertView.findViewById(R.id.paylist_item);viewHolder.mChildItemInfo = (TextView) convertView.findViewById(R.id.paylist_item_goldtv);convertView.setTag(viewHolder);}else{viewHolder = (ChildViewHolder) convertView.getTag();}viewHolder.mChildItemInfo.setText(mGroupMembers[groupPosition][childPosition]);viewHolder.mChildInfoItem.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View view){mOnChildItemClickListener.onChildItemClicked(groupPosition, childPosition);}});return convertView;}private final class ChildViewHolder{RelativeLayout mChildInfoItem;TextView mChildItemInfo;}@Overridepublic boolean isChildSelectable(int groupPosition, int childPosition){return true;}public interface OnChildItemClickListener{public void onChildItemClicked(int groupPosition, int childPosition);}public void setOnChildItemClickListener(OnChildItemClickListener onChildItemClickListener){mOnChildItemClickListener = onChildItemClickListener;}}

主要代码编写完成，下面来看看运行效果吧！

源码地址：http://download.csdn.net/detail/coder_jone/7885521