Android ExpandableListView 樣式自定義

最經搞Android的項目，需要使用ExpandableListView,需要使用XML定制每個選項的樣式。具體步驟如下：

       <ExpandableListView
         android:id="@+id/widget30"
         android:layout_width="317px"


android:layout_height="321px"
         android:layout_x="2px"
         android:layout_y="70px"
         android:drawSelectorOnTop="false">
      </ExpandableListView>

    public class ExpandableAdapter extends BaseExpandableListAdapter
{
    Activity activity;
    private List<String> group;  
    private List<List<String>> child;  
    public ExpandableAdapter(Activity a)
    {  
     activity = a;
     initialData(); //初始化顯示的數據
    }  
@Override
public Object getChild(int groupPosition, int childPosition) {
// TODO Auto-generated method stub
return child.get(groupPosition).get(childPosition); 
}
@Override
public long getChildId(int groupPosition, int childPosition) {
// TODO Auto-generated method stub
return childPosition;  
}
@Override //設置子選項樣式
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
String string = child.get(groupPosition).get(childPosition);  
        return getGenericView(string); 
}
@Override
public int getChildrenCount(int groupPosition) {
// TODO Auto-generated method stub
return child.get(groupPosition).size();  
}
@Override
public Object getGroup(int groupPosition) {
// TODO Auto-generated method stub
return group.get(groupPosition); 
}
@Override
public int getGroupCount() {
// TODO Auto-generated method stub
return group.size();  
}
@Override
public long getGroupId(int groupPosition) {
// TODO Auto-generated method stub
return groupPosition;  
}
@Override //使用LayoutInflater解析定制的XML文件,然后設置相應的樣式
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) 
{
// TODO Auto-generated method stub
String string = group.get(groupPosition); 
Context mContext = activity;   
     //LayoutInflater inflater = (LayoutInflater)mContext.getSystemService(LAYOUT_INFLATER_SERVICE);
     //View layout = inflater.inflate(R.layout.main_listview,null); 
     LayoutInflater inflater = LayoutInflater.from(mContext);
     View layout = inflater.inflate(R.layout.main_listview,null);
     TextView my_text = (TextView)layout.findViewById(R.id.ItemTitle);
     my_text.setText(string);
     //my_text.set
     ImageView my_image = (ImageView)layout.findViewById(R.id.ItemImage);
     my_image.setImageResource(R.drawable.icon_online);
     return layout;
        //return getGenericView(string);  
}
@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;
}
public void initialData()
{  
        group = new ArrayList<String>();  

        child = new ArrayList<List<String>>();  

        addInfo("Jerry  18718672108", new String[]{"呼叫"});  
        addInfo("Kim  18718672108",new String[]{"呼叫"});  
        addInfo("Landy  18718672108",new String[]{"呼叫"});  
    }  

    public void addInfo(String p,String[] c)
    {  
        group.add(p);  

        List<String> item = new ArrayList<String>();  

        for(int i=0;i<c.length;i++){  
            item.add(c[i]);  
        }    
        child.add(item);  
    }  
  //View stub to create Group/Children 's View  
    public TextView getGenericView(String s) 
    {  
        // Layout parameters for the ExpandableListView  
        AbsListView.LayoutParams lp = new AbsListView.LayoutParams(  
                ViewGroup.LayoutParams.FILL_PARENT, 64);  
        TextView text = new TextView(activity);  
        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;  
    }  
    public String GetGroupData(int pos)
    {
     return group.get(pos);
    }
}