Android 4.0 Ice Cream Sandwich 解析器错误

Question

我制作了一个从 Api 读取信息的应用程序。

链接:http://api.amp.active.com/camping/campground/details?contractCode=CO&parkId=50032&api_key=2chxq68efd4azrpygt5hh2qu

以下是我的代码:

NodeList list = element.getElementsByTagName("detailDescription");

        Log.i("ZealDeveloper","I M In detail   "+list.getLength());             
        if(list != null && list.getLength() > 0){


            for(int i = 0; i < list.getLength(); i++){

                entry = (Element) list.item(i);

                description = entry.getAttribute("description");
                drivingDirection = entry.getAttribute("drivingDirection");
                latitude=entry.getAttribute("latitude");
                longitude=entry.getAttribute("longitude");

            }               
        }

        NodeList list1 = element.getElementsByTagName("amenity");

        Log.i("ZealDeveloper","I M In 2   "+list1.getLength());

        if(list1 != null && list1.getLength() > 0){

            for(int i = 0; i < list1.getLength(); i++){
            entry = (Element) list1.item(i);

            nameAmenity = entry.getAttribute("name");

            listAmenity.add(nameAmenity);

            }               

            arrAmenity = listAmenity.toArray(new String[listAmenity.size()]);

            StringBuilder builder = new StringBuilder();

            for ( int i = 0; i < arrAmenity.length; i++ ){

                 builder.append(arrAmenity[i]+"\n");

            }
            txtAmenity.setText(builder);
    }

#

我正在获取 list.getLength() 作为 0(在以前的 android 版本中获取 1)，所以解析器这个条件.对于便利设施标签，我正在获得所需的列表大小。

Answer 1

我能想到的唯一原因是“detailDescription”已经是文档的根，所以 element 可能是您正在寻找的标签。它没有任何名为“detailDescription”的子项，因此 getElementsByTagName("detailDescription") 返回空列表。因此，请按如下方式更改代码的前半部分:

    Log.i("ZealDeveloper","I M In detail   " + element.getTagName()); 
    if(element.getTagName().equalsIgnoreCase("detailDescription")) {

            description = element.getAttribute("description");
            drivingDirection = element.getAttribute("drivingDirection");
            latitude = element.getAttribute("latitude");
            longitude = element.getAttribute("longitude");
    }  

    /* rest of your code...*/