Apps Create 2 groups in android expandable listview

[krishnaveni]

Hi i have try to develop expandable listview in android application.now i have one doubts.how is creating 2 groups ion below my code for separate child details...For Eg:
Group name:
OrderInfo,CustomerInfo.
Childname(OrderInfo)ayment_method.
Childname(CustomerInfo):name,email.How is to do.Please help me.

My code is:

 SimpleExpandableListAdapter expListAdapter =
            new SimpleExpandableListAdapter(
                    this,
                    
                    createGroupList(),              // Creating group List.
                    R.layout.group_row,  
                  // Group item layout XML.
                    new String[] { "OrderInfo","CustomerInfo"},  // the key of group item.
                    new int[] { R.id.order,R.id.customer},
                    
                    // ID of each group item.-Data under the key goes into this TextView.
                    createChildList(),              // childData describes second-level entries.
                    R.layout.single_list_item,  
                  //  new String[] {"KEY_ARTIST"},  
                   // new int[] { R.id.payment_label}  // Keys in childData maps to display.
                      // Layout for sub-level entries(second level).
                   new String[] {"KEY_ARTIST","KEY_DURATION","KEY_SUBTOTAL","KEY_DISCOUNT","KEY_COUPON","KEY_COST"},  
                   new int[] { R.id.payment_label,R.id.total_label,R.id.discount_label,R.id.discount_label,R.id.coupon_label,R.id.cost_label}// Keys in childData maps to display.
                 //   new int[] { R.id.payment_label,R.id.total_label}     // Data under the keys above go into these TextViews.
                );
            setListAdapter( expListAdapter );       // setting the adapter in the list.
 
        }catch(Exception e){
            System.out.println("Errrr +++ " + e.getMessage());
        }
    }
   
    /* Creating the Hashmap for the row */
    @SuppressWarnings("unchecked")
    private List createGroupList() {
          ArrayList result = new ArrayList();
          for( int i = 0 ; i < 1 ; ++i ) { // 15 groups........
            HashMap m = new HashMap();
           m.put( "CustomerInfo","CustomerInfo"); // the key and it's value.
           m.put( "OrderInfo", OrderInfo);
         
            result.add( m );
          }
          return (List)result;
          
    }

Here my above code is not worked..so please help me i have to change what line.