Android-如何为ExpandableListView的每个子级设置不同的图标

我有这个java代码，我有两个问题：

我想为每个家长的每个孩子设置一个不同的图标，但使用此代码，我只能为所有孩子设置相同的图标，或者为位于X位置的孩子设置一个图标，为另一个孩子设置另一个图标

例如，当我按下名为“Apple”的项目时，我是如何开始一项活动的

我怎样才能解决我的问题？多谢各位

public class sedactivity extends ExpandableListActivity { 
    ExpandableListAdapter mAdapter;
    private final static String NAME = "NAME";
    private final static String SURNAME = "SURNAME";
    private Resources res;
    private Drawable photo, photo2, photo3, photo4;
    private List<Drawable> albumCovers;


    @Override
    public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.list_main);

            // Create a List of Drawables to insert into the Expandable List
            // This can be completely dynamic
            res = this.getResources();
            photo = (Drawable) res.getDrawable(R.drawable.bee);
            photo2 = (Drawable) res.getDrawable(R.drawable.astro);
            photo3 = (Drawable) res.getDrawable(R.drawable.bomb);
            photo4 = (Drawable) res.getDrawable(R.drawable.apple);
            albumCovers = new ArrayList<Drawable>();
            albumCovers.add(photo);
            albumCovers.add(photo2);

            // The following code simply generates the Expandable Lists content (Strings)
            List<Map<String, String>> groupData = new ArrayList<Map<String, String>>();
            List<List<Map<String, String>>> childData = new ArrayList<List<Map<String, String>>>();
            Map<String, String>


            //List A
            curGroupMap = new HashMap<String, String>();
            groupData.add(curGroupMap);

            curGroupMap.put(NAME, "A");
            curGroupMap.put(SURNAME, "(2 Photos)");



            List<Map<String, String>> children = new ArrayList<Map<String, String>>();
            Map<String, String> curChildMap = new HashMap<String, String>();
            children.add(curChildMap);


            curChildMap.put(NAME, "Apple");


            curChildMap = new HashMap<String, String>();
            children.add(curChildMap);

            curChildMap.put(NAME, "Astro");

            curChildMap = new HashMap<String, String>();
            children.add(curChildMap);


            childData.add(children);


            //List B
            curGroupMap = new HashMap<String, String>();
            groupData.add(curGroupMap);


            curGroupMap.put(NAME, "B");
            curGroupMap.put(SURNAME, "(2 Photos)");

            children = new ArrayList<Map<String, String>>();

            curChildMap = new HashMap<String, String>();
            children.add(curChildMap);

            curChildMap.put(NAME, "Bee");

            curChildMap = new HashMap<String, String>();
            children.add(curChildMap);

            curChildMap.put(NAME, "Bomb");

            curChildMap = new HashMap<String, String>();
            children.add(curChildMap);


            childData.add(children);


            //List C
            curGroupMap = new HashMap<String, String>();
            groupData.add(curGroupMap);


            curGroupMap.put(NAME, "C");
            curGroupMap.put(SURNAME, "(0 Photo)");

            children = new ArrayList<Map<String, String>>();


            childData.add(children);

            // Set up our adapter
            mAdapter = new MyExpandableListAdapter(
                            this,
                            groupData,
                            R.layout.list_parent,
                            new String[] { NAME, SURNAME },
                            new int[] { R.id.rowText1, R.id.rowText2,R.id.photoAlbumImg },
                            childData,
                            R.layout.list_child,
                            new String[] { NAME, SURNAME },
                            new int[] { R.id.rowText1, R.id.photoAlbumImg }
                    );
            setListAdapter(mAdapter);
            registerForContextMenu(getExpandableListView());
    }


    /**
     * A simple adapter which allows you to bind data to specific
     * Views defined within the layout of an Expandable Lists children
     * (Implement getGroupView() to define the layout of parents)
     */


    public class MyExpandableListAdapter extends SimpleExpandableListAdapter {

            private List<? extends List<? extends Map<String, ?>>> mChildData;
            private String[] mChildFrom;
            private int[] mChildTo;

            public MyExpandableListAdapter(Context context,
                            List<? extends Map<String, ?>> groupData, int groupLayout,
                            String[] groupFrom, int[] groupTo,
                            List<? extends List<? extends Map<String, ?>>> childData,
                            int childLayout, String[] childFrom, int[] childTo) {
                    super(context, groupData, groupLayout, groupFrom, groupTo,
                          childData, childLayout, childFrom, childTo);

                    mChildData = childData;
                    mChildFrom = childFrom;
                    mChildTo = childTo;

            }

            public View getChildView(int groupPosition, int childPosition,
                    boolean isLastChild, View convertView, ViewGroup parent) {

            View v;
            if (convertView == null) {
                    v = newChildView(isLastChild, parent);
            } else {
                    v = convertView;
            }
            bindView(v, mChildData.get(groupPosition).get(childPosition), mChildFrom,
                            mChildTo, groupPosition, childPosition);
            return v;

            }

         // This method binds my data to the Views specified in the child xml layout
            private void bindView(View view, Map<String, ?> data, String[] from, int[] to, int groupPosition, int childPosition) {
                    int len = to.length - 1;
                    // Apply TextViews
                    for (int i = 0; i < len; ++i) {
                            TextView v = (TextView) view.findViewById(to[i]);
                            if (v != null) {
                                    v.setText((String) data.get(from[i]));
                            }
                            // Apply ImageView
                            ImageView imgV = (ImageView) view.findViewById(to[1]);
                            if (imgV != null) {
                                if(childPosition % 1 == 0) imgV.setImageDrawable(albumCovers.get(0));
                                else imgV.setImageDrawable(albumCovers.get(1));
                        }


                    }

            }
    }
}

公共类sedactivity扩展了ExpandableListActivity{
可扩展列表适配器；
私有最终静态字符串NAME=“NAME”；
私有最终静态字符串姓氏=“姓氏”；
私人资源；
私人可画照片，照片2，照片3，照片4；
私人名单封面；
@凌驾
创建时的公共void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.list_main）；
//创建要插入到可展开列表中的可展开列表
//这可以是完全动态的
res=this.getResources（）；
photo=（Drawable）res.getDrawable（R.Drawable.bee）；
photo2=（可绘制）res.getDrawable（R.Drawable.astro）；
photo3=（可绘制）res.getDrawable（R.Drawable.bomb）；
photo4=（可绘制）res.getDrawable（R.Drawable.apple）；
albumCovers=新的ArrayList（）；
相册封面。添加（照片）；
专辑封面。添加（照片2）；
//下面的代码只是生成可扩展的列表内容（字符串）
List groupData=new ArrayList（）；
List childData=new ArrayList（）；
地图
//列举
curGroupMap=newhashmap（）；
groupData.add（curGroupMap）；
curGroupMap.put（名称“A”）；
curGroupMap.put（姓氏，“（2张照片）”）；
List children=new ArrayList（）；
Map curChildMap=newhashmap（）；
添加（curChildMap）；
curChildMap.put（名称“Apple”）；
curChildMap=newhashmap（）；
添加（curChildMap）；
curChildMap.put（名称“Astro”）；
curChildMap=newhashmap（）；
添加（curChildMap）；
添加（子项）；
//名单B
curGroupMap=newhashmap（）；
groupData.add（curGroupMap）；
curGroupMap.put（名称“B”）；
curGroupMap.put（姓氏，“（2张照片）”）；
children=newarraylist（）；
curChildMap=newhashmap（）；
添加（curChildMap）；
curChildMap.put（名称“Bee”）；
curChildMap=newhashmap（）；
添加（curChildMap）；
curChildMap.put（名称“炸弹”）；
curChildMap=newhashmap（）；
添加（curChildMap）；
添加（子项）；
//清单C
curGroupMap=newhashmap（）；
groupData.add（curGroupMap）；
curGroupMap.put（名称“C”）；
curGroupMap.put（姓氏，“（0张照片）”）；
children=newarraylist（）；
添加（子项）；
//设置适配器
mAdapter=新的MyExpandableListAdapter(
这
分组数据，
R.layout.list\u父级，
新字符串[]{名称，姓氏}，
新int[]{R.id.rowText1，R.id.rowText2，R.id.photoAlbumImg}，
儿童数据，
R.layout.list_子对象，
新字符串[]{名称，姓氏}，
新int[]{R.id.rowText1，R.id.photoAlbumImg}
);
setListAdapter（mAdapter）；
registerForContextMenu（getExpandableListView（））；
}
/**
*一个简单的适配器，允许您将数据绑定到特定的
*在可展开列表的布局中定义的视图列出了子视图
*（实现getGroupView（）以定义父级的布局）
*/
公共类MyExpandableListAdapter扩展了SimpleExpandableListAdapter{
私人列表>>麦克希尔达；
私有字符串[]mChildFrom；
私人机构【】mChildTo；
公共MyExpandableListAdapter（上下文，
列表>组数据，int-groupLayout，
字符串[]groupFrom，int[]groupTo，
列表>>儿童数据，
int childLayout，字符串[]childFrom，int[]childTo）{
超级（上下文、groupData、groupLayout、groupFrom、groupTo、，
childData、childLayout、childFrom、childTo）；
mChildData=childData；
mChildFrom=childFrom；
mChildTo=childTo；
}
公共视图getChildView（int-groupPosition、int-childPosition、，
布尔值isLastChild、视图转换视图、视图组父级）{
观点五；
if（convertView==null）{
v=newChildView（isLastChild，父级）；
}否则{
v=转换视图；
}
bindView（v，mChildData.get（groupPosition）.get（childPosition），mChildFrom，
mChildTo、groupPosition、childPosition）；
返回v；
}
//此方法将我的数据绑定到子xml布局中指定的视图
私有void bindView（视图视图，映射数据，字符串[]from，int[]to，int groupPosition，int childPosition）{
int len=to.length-1；
//应用文本视图
对于（int i=0；iimgV.setImageDrawable(albumCovers.get(1))

view.setOnClickListener(new View.OnClickListener()
{
    @Override
    public void onClick(View v)
    {
        // TODO: Implement the tasks to be done here 
    }
});

for (int i = 0; i < len; ++i) {
        TextView v = (TextView) view.findViewById(to[i]);
        if (v != null) {
                v.setText((String) data.get(from[i]));
        }
        ImageView imgV = (ImageView) view.findViewById(to[1]);
        imgV.setImageResource(getResources().getIdentifier((String) 
            data.get(from[i]), "drawable", "yourdefaultpackage"));
    }
}

<?xml version="1.0" encoding="UTF-8"?>
<data>
    <group letter="A">
        <child name="American Bull" img="american_bull" />
        <child name="Arco's" img="arcos" />
    </group>
    <group letter="B">
        <child name="Barter" img="barter" />
        <child name="Bitter B." img="bitter_b" />
        <child name="Bull Hunter" img="bull_hunter" />
        <child name="Bull In Cuba" img="bull_in_cuba" />
        <child name="Bullito" img="bullito" />
    </group>
    <group letter="C">
        <child name="Cackle" img="cackle" />
        <child name="Cheapstake" img="cheapstake" />
        <child name="Checco's Bull" img="checcos_bull" />
        <child name="Cheeriness" img="cheeriness" />
        <child name="Cross Current" img="cross_current" />
        <child name="Cruel" img="cruel" />
    </group>
    <group letter="D"></group>
    <group letter="E"></group>
    <group letter="F">
        <child name="Firearm" img="firearm" />
        <child name="First Of All" img="first_of_all" />
        <child name="First Apple" img="first_apple" />
    </group>
    <group letter="G">
        <child name="Golden" img="golden" />
        <child name="Green Bull" img="green_bull" />
    </group>
    <group letter="H">
        <child name="Hollywood Passion" img="hollywood_passion" />
    </group>
    <group letter="I"></group>
    <group letter="J"></group>
    <group letter="K">
        <child name="Kind Bull" img="kind_bull" />
        <child name="Kingling" img="kingling" />
    </group>
    <group letter="L">
        <child name="Lab" img="lab" />
        <child name="Leary" img="leary" />
        <child name="Leg Pull" img="leg_pull" />
        <child name="Long Bull" img="long_bull" />
        <child name="Lucy" img="lucy" />
    </group>
    <group letter="M">
        <child name="Mayla" img="mayla" />
    </group>
    <group letter="N">
        <child name="New Red Bull Fantasy" img="new_red_bull_fantasy" />
        <child name="Nu Energy" img="nu_energy" />
    </group>
    <group letter="O"></group>
    <group letter="P">
        <child name="Passion" img="passion" />
        <child name="Power" img="power" />
    </group>
    <group letter="Q"></group>
    <group letter="R">
        <child name="Rebellion Red Peach" img="rebellion_red_peach" />
        <child name="Red Bulloska" img="red_bulloska" />
        <child name="Red 28" img="red_28" />
        <child name="Red Bull Wallbanger" img="red_bull_wallbanger" />
        <child name="Red Cell" img="red_cell" />
        <child name="Red Hothead" img="red_hothead" />
        <child name="Red Lime" img="red_lime" />
    </group>
    <group letter="S">
        <child name="Speedy" img="speedy" />
        <child name="Spritz Power" img="spritz_power" />
        <child name="Stiff-Necked" img="stiff_necked" />
    </group>
    <group letter="T"></group>
    <group letter="U"></group>
    <group letter="V">
        <child name="Vedi O' Mare Come E' Bull" img="vedi_o_mare_come_e_bull" />
    </group>
    <group letter="W"></group>
    <group letter="X"></group>
    <group letter="Y"></group>
    <group letter="Z"></group>
    <group letter="#"></group>
</data>

public class Group
{
    private String letter;
    private ArrayList<Child> children;

    /**
     * @return the letter
     */
    public String getLetter()
    {
        return letter;
    }

    /**
     * @param letter the letter to set
     */
    public void setLetter(String letter)
    {
        this.letter = letter;
    }

    /**
     * @return the children
     */
    public ArrayList<Child> getChildren()
    {
        return children;
    }

    /**
     * @param children the children to set
     */
    public void setChildren(ArrayList<Child> children)
    {
        this.children = children;
    }
}

public class Child
{
    private String name;
    private String image;

    /**
     * @return the name
     */
    public String getName()
    {
        return name;
    }

    /**
     * @param name the name to set
     */
    public void setName(String name)
    {
        this.name = name;
    }

    /**
     * @return the image
     */
    public String getImage()
    {
        return image;
    }

    /**
     * @param image the image to set
     */
    public void setImage(String image)
    {
        this.image = image;
    }
}

import java.util.ArrayList;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

public class XmlHandler extends DefaultHandler
{
    /**
     * The tag- and attribute names in the xml data
     */
    private static final String TAG_GROUP = "group";
    private static final String TAG_CHILD = "child";
    private static final String ATTR_LETTER = "letter";
    private static final String ATTR_NAME = "name";
    private static final String ATTR_IMG = "img";

    /**
     * holds the currently processing Group instance
     */
    private Group currentGroup;
    /**
     * holds the currently processing Child instance
     */
    private Child currentChild;
    /**
     * the list of Group objects parsed from the xml
     */
    private ArrayList<Group> records = null;

    /**
     * @return the list of Group parsed from the xml
     */
    public ArrayList<Group> getGroups()
    {
        return records;
    }

    @Override
    public void startDocument() throws SAXException
    {
        super.startDocument();
        this.records = new ArrayList<Group>();
    }

    @Override
    public void startElement(final String Uri, final String localName, final String qName, 
            final Attributes attributes) throws SAXException
    {
        if (localName == null)
            return;
        if (localName.equals(TAG_GROUP))//examining a group tag
        {
            currentGroup = new Group();
            currentGroup.setLetter(attributes.getValue(ATTR_LETTER));//the letter attribute
            currentGroup.setChildren(new ArrayList<Child>());
            records.add(currentGroup);
        }
        else if (localName.equals(TAG_CHILD))//examining a child tag
        {
            currentChild = new Child();
            currentChild.setName(attributes.getValue(ATTR_NAME));//the name attribute
            currentChild.setImage(attributes.getValue(ATTR_IMG));//the img attribute
            currentGroup.getChildren().add(currentChild);
        }
    }
}

import java.util.ArrayList;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.ImageView;
import android.widget.TextView;

public class MyExpandableListAdapter extends BaseExpandableListAdapter
{
    private final LayoutInflater inflater;
    private final ArrayList<Group> groups;

    public MyExpandableListAdapter(LayoutInflater inflater, final ArrayList<Group> groups)
    {
        this.inflater = inflater;
        this.groups = groups;
    }

    @Override
    public View getGroupView(int groupPosition, boolean isExpanded, 
            View convertView, ViewGroup parentView)
    {
        final Group parent = groups.get(groupPosition);
        if (convertView == null) //if the row is null, we create it (by inflation)
            convertView = inflater.inflate(R.layout.list_parent, parentView, false);
        // display the letter of the group:
        ((TextView) convertView.findViewById(R.id.rowText1)).
            setText(parent.getLetter());
        // display the children count of the group:
        ((TextView) convertView.findViewById(R.id.rowText2)).
            setText("(" + parent.getChildren().size() + " Ricette)");
        return convertView;
    }

    @Override
    public View getChildView(int groupPosition, int childPosition, boolean isLastChild, 
            View convertView, ViewGroup parentView)
    {
        final Group group = groups.get(groupPosition);
        final Child child = group.getChildren().get(childPosition);
        if (convertView == null)//if the child row is null, we inflate it
            convertView = inflater.inflate(R.layout.list_child, parentView, false);
        // display the name of the child on the row:
        ((TextView) convertView.findViewById(R.id.rowText1)).setText(child.getName());
        // set the proper icon of the child on the child row:
        ((ImageView) convertView.findViewById(R.id.photoAlbumImg)).
            setImageResource(parentView.getResources().
            getIdentifier(child.getImage(), "drawable", "com.test.com"));
        return convertView;
    }

    @Override
    public Object getChild(int groupPosition, int childPosition)
    {
        return groups.get(groupPosition).getChildren().get(childPosition);
    }

    @Override
    public long getChildId(int groupPosition, int childPosition)
    {
        return childPosition;
    }

    @Override
    public int getChildrenCount(int groupPosition)
    {
        return groups.get(groupPosition).getChildren().size();
    }

    @Override
    public Object getGroup(int groupPosition)
    {
        return groups.get(groupPosition);
    }

    @Override
    public int getGroupCount()
    {
        return groups.size();
    }

    @Override
    public long getGroupId(int groupPosition)
    {
        return groupPosition;
    }

    @Override
    public void notifyDataSetChanged()
    {
        super.notifyDataSetChanged();
    }

    @Override
    public boolean isEmpty()
    {
        return ((groups == null) || groups.isEmpty());
    }

    @Override
    public boolean isChildSelectable(int groupPosition, int childPosition)
    {
        return true;
    }

    @Override
    public boolean hasStableIds()
    {
        return true;
    }

    @Override
    public boolean areAllItemsEnabled()
    {
        return true;
    }
}

import java.util.ArrayList;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import android.app.ExpandableListActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.widget.ExpandableListAdapter;

/**
 * Demonstrates expandable lists using a custom {...@link ExpandableListAdapter} 
 * from {...@link BaseExpandableListAdapter}.
 */
public class testactivity extends ExpandableListActivity
{
    ExpandableListAdapter mAdapter;

    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.list_main);
        // the next line removes the arrow from the expandable list's group rows,
        // that indicates whether the group is expanded or not.
        // I've removed, because this way it looks nicer.
        getExpandableListView().setGroupIndicator(null);

        // read in the list of groups from the xml data
        final ArrayList<Group> groups = readGroupsFromXml();

        // Set up our adapter
        mAdapter = new MyExpandableListAdapter(getLayoutInflater(), groups);
        setListAdapter(mAdapter);
        registerForContextMenu(getExpandableListView());
    }

    /**
     * Parses the data.xml file located in the /res/raw/ folder, 
     * and builds up the list of Group.
     * @return the list of Group instances to display in the list
     */
    public ArrayList<Group> readGroupsFromXml()
    {
        try
        {
            // initialize our handler
            final XmlHandler handler = new XmlHandler();
            // instantiate a SAXParser for parsing the xml document
            final SAXParser sp = SAXParserFactory.newInstance().newSAXParser();
            // parse the /res/raw/data.xml file 
            // (referenced by R.raw.data) using our handler
            sp.parse(getApplicationContext().getResources().
                    openRawResource(R.raw.data), handler);
            // return the list of Group built inside the handler
            return handler.getGroups();
        }
        catch (Exception e)
        {
            Log.e("Error", "xml", e);
        }
        return null;
    }

    // Creo il menu
    @Override
    public boolean onCreateOptionsMenu(Menu menu)
    {
        super.onCreateOptionsMenu(menu);
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.menu, menu);
        return true;
    }

    // Creo le azioni per i tasti del menu
    @Override
    public boolean onOptionsItemSelected(MenuItem item)
    {
        super.onOptionsItemSelected(item);
        switch (item.getItemId())
        {
            case R.id.Home:
                return true;
            case R.id.Cerca:
                return true;
            case R.id.Glossario:
                // Inserire azione
                return true;
            default:
                return super.onOptionsItemSelected(item);
        }
    }
}