expandableListView 子项之间的干扰

Posted 2023-05-07

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【中文标题】expandableListView 子项之间的干扰【英文标题】：Interference between expandableListView children 【发布时间】：2015-12-15 13:03:09 【问题描述】：

我在实现可扩展列表视图时遇到了一些问题。我已经实现了我的 ExpandableListAdapter

公共类 ExpandableListAdapter 扩展 BaseExpandableListAdapter

private static final int SUM = 1;
private static final int SUB = 2;

private Context context;
private List<String> listDataHeader;    //Header titles
private HashMap<String, List<Article>> listDataChild;
private HashMap<Integer, Bitmap> productImagesHashMap;

public ExpandableListAdapter (Context context, List<String> listDataHeader, HashMap<String, List<Article>> listDataChild, HashMap<Integer, Bitmap> productImagesHashMap) 
    this.context = context;
    this.listDataHeader = listDataHeader;
    this.listDataChild = listDataChild;
    this.productImagesHashMap = productImagesHashMap;


@Override
public int getGroupCount() 
    return this.listDataHeader.size();


@Override
public int getChildrenCount(int groupPosition) 
    return this.listDataChild.get(this.listDataHeader.get(groupPosition)).size();


@Override
public Object getGroup(int groupPosition) 
    return this.listDataHeader.get(groupPosition);


@Override
public Object getChild(int groupPosition, int childPosition) 
    return this.listDataChild.get(this.listDataHeader.get(groupPosition)).get(childPosition);


@Override
public long getGroupId(int groupPosition) 
    return groupPosition;


@Override
public long getChildId(int groupPosition, int childPosition) 
    return childPosition;


@Override
public boolean hasStableIds() 
    return false;


@Override
public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) 

    String headerTitle = (String) getGroup(groupPosition);
    if (convertView == null) 
        LayoutInflater layoutInflater = (LayoutInflater) this.context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        convertView = layoutInflater.inflate(R.layout.user_expand_listview_header, null);
    

    TextView listHeaderTextView = (TextView) convertView.findViewById(R.id.list_header);
    listHeaderTextView.setTypeface(null, Typeface.BOLD);
    listHeaderTextView.setText(headerTitle);

    return convertView;


@Override
public View getChildView(final int groupPosition, final int childPosition,
                         boolean isLastChild, View convertView, ViewGroup parent) 

    final Article childValues = (Article) getChild(groupPosition, childPosition);

    if (convertView == null) 
        LayoutInflater layoutInflater = (LayoutInflater) this.context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        convertView = layoutInflater.inflate(R.layout.product_row, null);
    

    Integer articleId = childValues.getId();

    final TextView articleIdTextView = (TextView) convertView.findViewById(R.id.product_id);
    ImageView productImageTextView = (ImageView) convertView.findViewById(R.id.product_image);
    TextView productNameTextView = (TextView) convertView.findViewById(R.id.product_name);
    TextView productDescriptionTextView = (TextView) convertView.findViewById(R.id.product_description);
    final TextView productPriceTextView = (TextView) convertView.findViewById(R.id.product_price);

    articleIdTextView.setText(articleId.toString());
    productImageTextView.setImageBitmap(productImagesHashMap.get(articleId));
    productNameTextView.setText(childValues.getNome());
    productDescriptionTextView.setText(childValues.getDescrizione());
    productPriceTextView.setText(childValues.getPrezzo());

    ImageButton addButton = (ImageButton) convertView.findViewById(R.id.add_btn);
    final TextView articleQty =(TextView) convertView.findViewById(R.id.product_qnty);
    ImageButton removeButton = (ImageButton) convertView.findViewById(R.id.remove_btn);

    addButton.setOnClickListener(new Button.OnClickListener() 

        @Override
        public void onClick(View view) 
            if (context instanceof UserActivity) 
                ((UserActivity) context).updateTotal(
                        Integer.parseInt(articleIdTextView.getText().toString()),
                        productPriceTextView.getText().toString(),
                        SUM);
                articleQty.setText(updateProductQty(articleQty, SUM));
            
        
    );

    removeButton.setOnClickListener(new Button.OnClickListener() 

        @Override
        public void onClick(View view) 
            if (context instanceof UserActivity) 
                ((UserActivity) context).updateTotal(
                        Integer.parseInt(articleIdTextView.getText().toString()),
                        productPriceTextView.getText().toString(),
                        SUB);
                articleQty.setText(updateProductQty(articleQty, SUB));
            
        
    );

    return convertView;


@Override
public boolean isChildSelectable(int i, int i1) 
    return true;


private String updateProductQty(TextView productQty, int operation) 
    Integer qty = Integer.parseInt(productQty.getText().toString());
    switch (operation) 
        case 1: //SUM
            qty += 1;
            break;
        case 2: //SUB
            if (qty > 0)
                qty -= 1;
            break;
    
    return qty.toString();

有些产品从数据库中读取并按类型（实际上是笔、笔记本和纸）插入 ExpandableListView。然后有两个按钮允许选择用户想要购买的数量，数量由 TextView 跟踪。现在，当我使用普通的 ListView 实现这一点时，一切正常，但使用 ExpandableListView 时，子项的数量 TextView 之间存在干扰。

例如，ExpandableListView的实际组成是这样的：

笔

-- 黑笔

-- 蓝笔

-- 红笔

笔记本

-- 黑色笔记本

-- 蓝色笔记本

-- 红色笔记本

纸

-- A4纸

如果用户添加了黑色笔记本，则还添加了蓝色笔