1. exListView.setAdapter(exlvAdapter);   
2. //遍歷所有group,將所有項設定成預設展開
3.  intgroupCount = exListView.getCount();   
4. for (inti=0; i<groupCount; i++)  
5.  {   
6.        exListView.expandGroup(i);  
7.  };   

1. <?xmlversion="1.0"encoding="utf-8"?>
2. <selectorxmlns:android="http://schemas.android.com/apk/res/android">
3.      <itemandroid:state_expanded
   ="true"android:drawable="@drawable/expandablelistviewindicatordown"/>
4.       <itemandroid:drawable="@drawable/expandablelistviewindicator"/>
5.  </selector>

加一句程式碼如下： 

1. settingLists.setGroupIndicator(this.getResources().getDrawable(R.layout.expandablelistviewselector));    
2. 或xml設定：  
3.     android:groupIndicator="@drawable/groupIndicator_selector"

大功告成 

elistview.setGroupIndicator(null);//將控制元件預設的左邊箭頭去掉，

 2在自定義的繼承自BaseExpandableListAdapter的adapter中有一個方法

1. /** * 父類view */@Override
2. ublic View getGroupView(intgroupPosition, booleanisExpanded, View convertView, ViewGroup parent)  
3. { Log.i("zhaoxiong","parent view");   
4.      LinearLayoutparentLayout=(LinearLayout) View.inflate(context, R.layout.wowocoupons_parent_item, null);   
5.     TextViewparentTextView=(TextView)parentLayout.findViewById(R.id.parentitem);  
6.     parentTextView.setText(parentlist.get(groupPosition));   
7.     ImageViewparentImageViw=(ImageView) parentLayout.findViewById(R.id.arrow);   
8.     //判斷isExpanded就可以控制是按下還是關閉，同時更換圖片
9.    if(isExpanded){   
10.        parentImageViw.setBackgroundResource(R.drawable.arrow_down);   
11.     }else{   
12.         parentImageViw.setBackgroundResource(R.drawable.arrow_up); }    
13.      return parentLayout;  
14. }  

1. exList.setOnGroupExpandListener(new OnGroupExpandListener() {    
2.         @Override
3.         publicvoid onGroupExpand(int groupPosition) {    
4.             for (int i = 0; i < getData().size(); i++) {    
5.                 if (groupPosition != i) {    
6.                     exList.collapseGroup(i);    
7.                 }    
8.             }    
9.         }    
10.     });  

1.          tt_list.setOnGroupClickListener(new OnGroupClickListener() {  
2.             @Override
3.             publicboolean onGroupClick(ExpandableListView parent, View v,  
4.                     int groupPosition, long id) {  
5.                 IsFlag=true;  
6.                 if(adapter.getGroupData().get(groupPosition).getList().size()==1){  
7.                     Bundle b=new Bundle();  
8.                     b.putInt("saveIndex", 0);  
9. //                  b.putString("mac", mac);
10. //                  b.putString("deviceId", mDeviceId);
11.                     b.putSerializable("datalist", adapter.getGroupData().get(groupPosition).getList());  
12.                     Intent i=new Intent(WappushBindingActivity.this,VideoPlayerActivity.class);  
13.                     i.putExtras(b);   
14.                     startActivity(i);  
15.                 }  
16. //              int groupCount = tt_list.getCount();   
17. //              for (int i=0; i<groupCount; i++){   
18. //                  if(i!=GroupPosition)
19. //                      tt_list.collapseGroup(i);  
20. //               }; 
21. //              Log.v("xulongheng*WappushBind*tt_list", "onGroupClick:"+previousX+"/"+previousY);
22.                 returntrue;   //預設為false，設為true時，點選事件不會展開Group
23.             }  
24.         });