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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 --><ExpandableListViewandroid: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 ExpandableListViewAbsListView.LayoutParams lp = new AbsListView.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, 40); TextView text = new TextView(ContactsActivity.this);text.setLayoutParams(lp);// Center the text verticallytext.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT);// Set the text starting positiontext.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:


希望本文所述对大家学习Android软件编程有所帮助。