Android ExpandableListView執行個體Demo

標籤：android expandableli

前幾篇文章介紹了Listview，但在實際開發中也經常會用到多層的Listview來展示資料，比如qq中的好友展示，所以這張來瞭解一下ExpandableListview，基本思想與Listview大致是相同的，所以用起來會比較方便。

實現：

程式碼：

布局檔案：

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=".MainActivity" >    <ExpandableListView        android:id="@+id/expandableListView"        android:layout_width="wrap_content"        android:layout_height="wrap_content" >    </ExpandableListView></RelativeLayout>

group和child共同使用的布局(當然也可以使用不同的布局來實現)，這的布局比較簡單，只有一個Textview：

list_item:

<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=".MainActivity" >    <TextView        android:id="@+id/textView"        android:layout_width="wrap_content"        android:layout_height="wrap_content" /></RelativeLayout>

MainActivity：

package com.listviewdemo_expandablelistview;import java.util.ArrayList;import java.util.List;import android.app.Activity;import android.os.Bundle;import android.widget.ExpandableListView;public class MainActivity extends Activity {private ExpandableListView listView;private List<String> group;private List<List<String>> child;private MyAdapter adapter;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);listView = (ExpandableListView) findViewById(R.id.expandableListView);/** * 初始化資料  */initData();adapter = new MyAdapter(this,group,child);listView.setAdapter(adapter);}private void initData() {group = new ArrayList<String>();child = new ArrayList<List<String>>();addInfo("北京",new String[]{"朝陽","海澱","東城區","西城區"});addInfo("河北", new String[]{"邯鄲","石家莊","邢台"});addInfo("廣東", new String[]{"廣州","深圳","珠海"});}/** * 添加資料資訊 * @param g * @param c */private void addInfo(String g,String[] c) {group.add(g);List<String> list = new ArrayList<String>();for (int i = 0; i < c.length; i++) {list.add(c[i]);}child.add(list);}}

MyAdapter：

package com.listviewdemo_expandablelistview;import java.util.List;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseExpandableListAdapter;import android.widget.TextView;/** * expandableListView適配器 * */public class MyAdapter extends BaseExpandableListAdapter {private Context context;private List<String> group;private List<List<String>> child;public MyAdapter(Context context, List<String> group,List<List<String>> child) {this.context = context;this.group = group;this.child = child;}@Overridepublic int getGroupCount() {return group.size();}@Overridepublic int getChildrenCount(int groupPosition) {return child.size();}@Overridepublic Object getGroup(int groupPosition) {return group.get(groupPosition);}@Overridepublic Object getChild(int groupPosition, int childPosition) {return child.get(childPosition).get(childPosition);}@Overridepublic long getGroupId(int groupPosition) {return groupPosition;}@Overridepublic long getChildId(int groupPosition, int childPosition) {return childPosition;}@Overridepublic boolean hasStableIds() {return false;}/** * 顯示：group */@Overridepublic View getGroupView(int groupPosition, boolean isExpanded,View convertView, ViewGroup parent) {ViewHolder holder;if (convertView == null) {convertView = LayoutInflater.from(context).inflate(R.layout.list_item, null);holder = new ViewHolder();holder.textView = (TextView) convertView.findViewById(R.id.textView);convertView.setTag(holder);} else {holder = (ViewHolder) convertView.getTag();}holder.textView.setText(group.get(groupPosition));holder.textView.setTextSize(25);holder.textView.setPadding(36, 10, 0, 10);return convertView;}/** * 顯示：child */@Overridepublic View getChildView(int groupPosition, int childPosition,boolean isLastChild, View convertView, ViewGroup parent) {ViewHolder holder;if (convertView == null) {convertView = LayoutInflater.from(context).inflate(R.layout.list_item, null);holder = new ViewHolder();holder.textView = (TextView) convertView.findViewById(R.id.textView);convertView.setTag(holder);} else {holder = (ViewHolder) convertView.getTag();}holder.textView.setText(child.get(groupPosition).get(childPosition));holder.textView.setTextSize(20);holder.textView.setPadding(72, 10, 0, 10);return convertView;}class ViewHolder {TextView textView;}@Overridepublic boolean isChildSelectable(int groupPosition, int childPosition) {return false;}}

現在CSDN部落格中加入連結需要審核後才能發表，所以需要源碼的可以到我上傳的資源中尋找。