Android中ExpandableListView控件基本使用

本文采用一个Demo来展示Android中ExpandableListView控件的使用，如如何在组/子ListView中绑定数据源。直接上代码如下：

程序结构图：

layout目录下的 main.xml 文件源码如下：

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <!-- 我们会自己定义listview的显示方式（在另外一个布局文件里边）不用默认的方式 如果自定义listview的显示方式这里这个android:id="@id/android:list" 必须这样写 --> <!-- android:drawSelectOnTop="false"此属性用来设置listview上的背景颜色会不会 挡住（覆盖）内容 , 如果这是为false就表示不会覆盖掉 --> <ExpandableListView android:id="@id/android:list" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_weight="1" android:drawSelectorOnTop="false"/> </LinearLayout>

包 com.andyidea.demo中ContactsActivity.java源码如下：

package com.andyidea.demo; import java.util.ArrayList; import java.util.List; import android.app.ExpandableListActivity; import android.os.Bundle; import android.view.Gravity; import android.view.View; import android.view.ViewGroup; import android.view.Window; import android.widget.AbsListView; import android.widget.BaseExpandableListAdapter; import android.widget.TextView; public class ContactsActivity extends ExpandableListActivity { List<String> group; //组列表 List<List<String>> child; //子列表 ContactsInfoAdapter adapter; //数据适配器 /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); //设置为无标题 setContentView(R.layout.main); getExpandableListView().setBackgroundResource(R.drawable.default_bg); initializeData(); getExpandableListView().setAdapter(new ContactsInfoAdapter()); getExpandableListView().setCacheColorHint(0); //设置拖动列表的时候防止出现黑色背景 } /** * 初始化组、子列表数据 */ private void initializeData(){ group = new ArrayList<String>(); child = new ArrayList<List<String>>(); addInfo("Andy",new String[]{"male","138123***","GuangZhou"}); addInfo("Fairy",new String[]{"female","138123***","GuangZhou"}); addInfo("Jerry",new String[]{"male","138123***","ShenZhen"}); addInfo("Tom",new String[]{"female","138123***","ShangHai"}); addInfo("Bill",new String[]{"male","138231***","ZhanJiang"}); } /** * 模拟给组、子列表添加数据 * @param g-group * @param c-child */ private void addInfo(String g,String[] c){ group.add(g); List<String> childitem = new ArrayList<String>(); for(int i=0;i<c.length;i++){ childitem.add(c[i]); } child.add(childitem); } class ContactsInfoAdapter extends BaseExpandableListAdapter{ //-----------------Child----------------// @Override public Object getChild(int groupPosition, int childPosition) { return child.get(groupPosition).get(childPosition); } @Override public long getChildId(int groupPosition, int childPosition) { return childPosition; } @Override public int getChildrenCount(int groupPosition) { return child.get(groupPosition).size(); } @Override public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) { String string = child.get(groupPosition).get(childPosition); return getGenericView(string); } //----------------Group----------------// @Override public Object getGroup(int groupPosition) { return group.get(groupPosition); } @Override public long getGroupId(int groupPosition) { return groupPosition; } @Override public int getGroupCount() { return group.size(); } @Override public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) { String string = group.get(groupPosition); return getGenericView(string); } //创建组/子视图 public TextView getGenericView(String s) { // Layout parameters for the ExpandableListView AbsListView.LayoutParams lp = new AbsListView.LayoutParams( ViewGroup.LayoutParams.FILL_PARENT, 40); TextView text = new TextView(ContactsActivity.this); text.setLayoutParams(lp); // Center the text vertically text.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT); // Set the text starting position text.setPadding(36, 0, 0, 0); text.setText(s); return text; } @Override public boolean hasStableIds() { // TODO Auto-generated method stub return false; } @Override public boolean isChildSelectable(int groupPosition, int childPosition) { // TODO Auto-generated method stub return true; } } }

最后，程序运行后截图如下：