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JAVA代码package com.example.wequst.test2;import android.app.Activity;import android.app.AlertDialog;import android.os.Bundle;import android.view.View;import android.view.ViewGroup;import android.widget.AbsListView;import android.widget.BaseExpandableListAdapter;import android.widget.ExpandableListAdapter;import android.widget.ExpandableListView;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.TextView;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;public class ExpandableListViewActivity extends Activity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_expandable_list_view);        /**BaseExpandableListAdapter实现了ExpandableListAdapter*/        final ExpandableListAdapter adapter = new BaseExpandableListAdapter(){            /**----------定义数组-------------------------------------------------------------------*/            private int[] images = new int[]{                    R.drawable.ic_launcher,                    R.drawable.ic_launcher,                    R.drawable.ic_launcher            };            private String[] armTypes = new String[]{                    "神族","虫族","人族"            };            private String[][] arms = new String[][]{                    {
    "狂战士","龙骑士","黑暗圣堂"},                    {
    "小狗","飞龙","自爆妃子"},                    {
    "步兵","伞兵","护士mm"}            };/*===========组元素表示可折叠的列表项，子元素表示列表项展开后看到的多个子元素项=============*/            /**----------得到armTypes和arms中每一个元素的ID-------------------------------------------*/            //获取组在给定的位置编号，即armTypes中元素的ID            @Override            public long getGroupId(int groupPosition) {                return groupPosition;            }            //获取在给定的组的儿童的ID，就是arms中元素的ID            @Override            public long getChildId(int groupPosition, int childPosition) {                return childPosition;            }            /**----------根据上面得到的ID的值，来得到armTypes和arms中元素的个数 ------------------------*/            //获取的群体数量，得到armTypes里元素的个数            @Override            public int getGroupCount() {                return armTypes.length;            }            //取得指定组中的儿童人数，就是armTypes中每一个种族它军种的个数            @Override            public int getChildrenCount(int groupPosition) {                return arms[groupPosition].length;            }            /**----------利用上面getGroupId得到ID，从而根据ID得到armTypes中的数据，并填到TextView中 -----*/            //获取与给定的组相关的数据，得到数组armTypes中元素的数据            @Override            public Object getGroup(int groupPosition) {                return armTypes[groupPosition];            }            //获取一个视图显示给定组，存放armTypes            @Override            public View getGroupView(int groupPosition, boolean isExpanded,                                     View convertView, ViewGroup parent) {                TextView textView = getTextView();//调用定义的getTextView()方法                textView.setText(getGroup(groupPosition).toString());//添加数据                return textView;            }            /**----------利用上面getChildId得到ID，从而根据ID得到arms中的数据，并填到TextView中---------*/            //获取与孩子在给定的组相关的数据,得到数组arms中元素的数据            @Override            public Object getChild(int groupPosition, int childPosition) {                return arms[groupPosition][childPosition];            }            //获取一个视图显示在给定的组 的儿童的数据，就是存放arms            @Override            public View getChildView(int groupPosition, int childPosition, boolean isLastChild,                                     View convertView, ViewGroup parent) {                LinearLayout ll = new LinearLayout(ExpandableListViewActivity.this);                ImageView logo = new ImageView(ExpandableListViewActivity.this);                logo.setImageResource(images[groupPosition]);//添加图片                ll.addView(logo);                TextView textView = getTextView();//调用定义的getTextView()方法                textView.setText(getChild(groupPosition,childPosition).toString());//添加数据                ll.addView(textView);                return ll;            }            /**------------------自定义一个设定TextView属性的方法----------------------------------------------*/            //定义一个TextView            private TextView getTextView(){                AbsListView.LayoutParams lp = new AbsListView.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT,100);                TextView textView = new TextView(ExpandableListViewActivity.this);                textView.setLayoutParams(lp);                textView.setPadding(70, 0, 0, 0);                textView.setTextSize(20);                return textView;            }            /**-------------------其他设置-------------------------------------------------------------------*/            //孩子在指定的位置是可选的，即：arms中的元素是可点击的            @Override            public boolean isChildSelectable(int groupPosition,                                             int childPosition) {                return true;            }            //表示孩子是否和组ID是跨基础数据的更改稳定            public boolean hasStableIds() {                return true;            }        };        /**使用适配器*/        final ExpandableListView expandListView = (ExpandableListView) this.findViewById(R.id.ecpandable);        expandListView.setAdapter(adapter);        expandListView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {            @Override            public boolean onChildClick(ExpandableListView parent, View v,                                        int groupPosition, int childPosition, long id) {                return true;            }        });        expandListView.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {            @Override            public boolean onGroupClick(ExpandableListView parent, View v,                                        int groupPosition, long id) {                int i=adapter.getChildrenCount(groupPosition);                if(i==0)                {                }                return false;   //默认为false，设为true时，点击事件不会展开Group            }        });    }}