Expandablelistview中的奇怪行为-Android

我的活动是为了记录用户指定的食物摄入量。他们有菜单可供选择(早餐、午餐和晚餐-外部组),这些菜单可以扩展以显示其内容。 当用户单击内部菜单项时,会出现一个对话框,询问用户数量。一旦他们输入一个数量并关闭对话框,菜单项上的文本就会改变,以反映该项已消耗的数量

上图显示处于关闭状态的列表。

以下是我打开午餐菜单,点击“薯片”后的列表,显示数量为1。如您所见,“Potato”itemtext现在已更改为反映数量1。

奇怪的部分现在发生了。如果我单击“午餐”并关闭列表,然后再次单击它重新打开,则“数量X 1”文本已跳转到另一项(牛奶)

相关的代码位如下:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content">

    <TextView android:id="@+id/childname"
         android:paddingLeft="50dip"

         android:textSize="14dip"
         android:textStyle="italic"
         android:layout_width="200dip"
         android:textColor="@color/black"
         android:layout_height="40dip"/>

    <TextView android:id="@+id/qty_display"
         android:text="-"
         android:textSize="14dip"
         android:textStyle="italic"
         android:layout_width="50dip"
         android:textColor="@color/black"
         android:layout_height="wrap_content"/>
</LinearLayout>

单击子元素时触发的代码:

public boolean onChildClick(
            ExpandableListView parent, 
            View v, 
            int groupPosition,
            int childPosition,
            long id) {

           // open the dialog and inflate the buttons
     myDialog  = new Dialog(this);
  myDialog.setTitle("Food Item Qty");
  myDialog.setContentView(R.layout.food_intake_dialog);
  final Button ok = (Button)myDialog.findViewById(R.id.fi_ok_but);
     Button cancel = (Button)myDialog.findViewById(R.id.fi_cancel_but); 

     //the id for this item is stored as a hash key in a map (say, item_id01)
     String key = "item_id"+groupPosition+""+childPosition;
     current_selected_food_item_id = Integer.parseInt(itemMap.get(key));

       // inflate the textview that shows the qty for this item on the expandablelist
     barQty = (TextView) v.findViewById(R.id.qty_display);

        // set the ok button to record teh quantity on press
     ok.setOnClickListener(new OnClickListener() {
   public void onClick(View viewParam) {

                             //inflate the input box that receives quantity from user
    EditText fiQty = (EditText) myDialog.findViewById(R.id.fiQty);
    // get the quantity and append the text on hte list item
    String qty = fiQty.getText().toString();
    barQty.setText("Qty X "+qty);

                            //open the database and save state 
                FoodIntake.this.application.getFoodIntakeHelper().open();   
 FoodIntake.this.application.getFoodIntakeHelper().storeFoodIntakeLog(current_selected_food_item_id,qty,visit_id,remote_visit_id);
    String log = FoodIntake.this.application.getFoodIntakeHelper().getFoodIntakeLog(visit_id);
    FoodIntake.this.application.getFoodIntakeHelper().close();

                        //    append the main food intake list and close the dialog
                            list.setText("Food Intake Log:\n\n"+log);
    myDialog.cancel();
   }
     });

上面的代码打开一个对话框,接受一个quantity值,附加list元素以反映这一点,还保存到数据库并设置一个包含所选项目和数量的textview。