xml分析与可扩展的细节

Question

嗨，我有一个XML解析example.here我必须添加可扩展listview.how是添加here.please帮助我。

这是我的代码：

public class SingleMenuItemActivity extends ExpandableListActivity { 
static final String KEY_ARTIST = "payment_method"; 
static final String KEY_SUBTOTAL = "subtotal"; 
static final String KEY_DISCOUNT = "discount"; 

@SuppressWarnings("unchecked") 
public void onCreate(Bundle savedInstanceState) { 
    try{ 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 
     Intent in = getIntent(); 
     String subtotal = in.getStringExtra(KEY_SUBTOTAL); 
     String discount = in.getStringExtra(KEY_DISCOUNT); 
     String payment_method = in.getStringExtra(KEY_ARTIST); 

     TextView lblSub = (TextView) findViewById(R.id.subtotal_label); 
     TextView lblTotal = (TextView) findViewById(R.id.total_label); 
     TextView lblPayment = (TextView) findViewById(R.id.payment_label); 

     lblSub.setText(subtotal); 
     lbldiscount.setText(discount); 
     lblPayment.setText(payment_method); 

    SimpleExpandableListAdapter expListAdapter = 
     new SimpleExpandableListAdapter(
       this, 
       createGroupList(),    // Creating group List. 
       R.layout.group_row,    // Group item layout XML. 
       new String[] { "Order Info" }, // the key of group item. 
       new int[] { R.id.order}, 

       // ID of each group item.-Data under the key goes into this TextView. 
       createChildList(),    // childData describes second-level entries. 
       R.layout.single_list_item,    // Layout for sub-level entries(second level). 
       new String[] {"payment_label:"},  // Keys in childData maps to display. 
       new int[] { R.id.payment_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("Order Info","Order Info " + i); // the key and it's value. 
     result.add(m); 
     } 
     return (List)result; 

} 

/* creatin the HashMap for the children */ 
@SuppressWarnings("unchecked") 
private List createChildList() { 

    ArrayList result = new ArrayList(); 
    for(int i = 0 ; i < 2 ; ++i) { // this -15 is the number of groups(Here it's fifteen) 
     /* each group need each HashMap-Here for each group we have 3 subgroups */ 
     ArrayList secList = new ArrayList(); 
     for(int n = 0 ; n < 1 ; n++) { 
     HashMap child = new HashMap(); 
     child.put("payment_label", "payment_label " + n); 

     secList.add(child); 
     } 
    result.add(secList); 
    } 
    return result; 
} 
public void onContentChanged () { 
    System.out.println("onContentChanged"); 
    super.onContentChanged(); 
} 
/* This function is called on each child click */ 
public boolean onChildClick(ExpandableListView parent, View v, int groupPosition,int childPosition,long id) { 
    System.out.println("Inside onChildClick at groupPosition = " + groupPosition +" Child clicked at position " + childPosition); 
    return true; 
} 

/* This function is called on expansion of the group */ 
public void onGroupExpand (int groupPosition) { 
    try{ 
     System.out.println("Group exapanding Listener => groupPosition = " + groupPosition); 
    }catch(Exception e){ 
     System.out.println(" groupPosition Errrr +++ " + e.getMessage()); 
    } 
} 

} 如果我必须点击特定的产品意味着它是进入下一活性。下一个活动都有详细的说明与扩张button.if我必须点击详细描述意味着它是扩展和显示payment_method，小计，折扣，否则它停留在less.please帮助我.how是要做.... ....如何开发我的代码与上述应用程序。

我main.xml中的文件是：

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:orientation="vertical" 
android:layout_width="fill_parent" 
android:layout_height="fill_parent" 
> 
    <ExpandableListView android:id="@+id/android:list" 
      android:layout_width="fill_parent" 
      android:layout_height="fill_parent" 
      android:background="@drawable/bkg"/> 

<TextView android:id="@+id/android:empty" 
      android:layout_width="fill_parent" 
      android:layout_height="fill_parent" 
      android:text="No items"/> 

这里我得到了输出为零......什么样的变化是我能做到here.please帮助我。

Answer 1

check the below code snippet: 
ListView lv; 
lv = (ListView) findViewById(R.id.ListView01); 
lv.setAdapter(adapter); 
    lv.setOnItemClickListener(new OnItemClickListener() { 
      public void onItemClick(AdapterView<?> parent, View view, 
        int position, long id) { 
gotoActivity(); 

      } 
     }); 

start your activity in gotoactivity method using startActivityforResult method to take the values