Android列表视图无法正常工作

时间:2011-02-14 14:02:10

标签: android xml listview sax

您好 我正在尝试从Web读取XML并将其显示在Listview中。在XML中我有3条记录,而我的Listview只显示最后一条记录。如果有人能帮助我识别错误,那将是很棒的! 我正在使用SAX从网上阅读。

处理程序:

public class SearchItemHandler extends DefaultHandler{
private boolean in_itemName=false;
private boolean in_itemAddress=false;
private boolean in_itemLatitude=false;
private boolean in_itemLongitude=false;
private boolean in_business=false;
private boolean in_local=false;

private SearchItem sItem=new SearchItem();
public SearchItem getParsedData(){
    return this.sItem;
}
    public static List<SearchItem> list=new ArrayList<SearchItem>();

@Override
public void startDocument() throws SAXException {
        this.sItem = new SearchItem();
}

@Override
public void endDocument() throws SAXException {
        // Nothing to do
}
@Override
public void startElement(String namespaceURI,String localname,String qName,Attributes atts)throws SAXException{
    if(localname.equalsIgnoreCase("Business")){
        this.in_business=true;
    }else if(localname.equalsIgnoreCase("local")){
        this.in_local=true;
    }else if(localname.equalsIgnoreCase("ItemName")){
        String itemname=atts.getValue("name");
        sItem.setItemName(itemname);
        this.in_itemName=true;
    }else if(localname.equalsIgnoreCase("ItemAddress")){
        String itemaddress=atts.getValue("address");
        sItem.setItemAddress(itemaddress);
        this.in_itemAddress=true;
    }else if(localname.equalsIgnoreCase("Latitude")){
        double lat=Double.parseDouble(atts.getValue("lat"));
        sItem.setLatitude(lat);
        this.in_itemLatitude=true;
    }else if(localname.equalsIgnoreCase("Longitude")){
        double lon=Double.parseDouble(atts.getValue("lon"));
        sItem.setLatitude(lon);
        this.in_itemLongitude=true;
}
 list.add(sItem);

}     @覆盖     public void endElement(String namespaceURI,String localname,String qName)throws SAXException {         如果(localname.equalsIgnoreCase( “业务”)){             this.in_business = FALSE;         } else if(localname.equalsIgnoreCase(“local”)){             this.in_local = FALSE;         } else if(localname.equalsIgnoreCase(“ItemName”)){             this.in_itemName = FALSE;         } else if(localname.equalsIgnoreCase(“ItemAddress”)){             this.in_itemAddress = FALSE;         } else if(localname.equalsIgnoreCase(“Latitude”)){             this.in_itemLatitude = FALSE;         } else if(localname.equalsIgnoreCase(“Longitude”)){             this.in_itemLongitude = FALSE;         }
}     @覆盖     public void characters(char ch [],int start,int length){                 如果(this.in_local){                 //currentCondition.(new String(ch,start,length));                // sItem.equals(new String(ch,start,length));         }     }

活动:

public class SearchItemListActivity extends ListActivity{
String param="Bar";
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.custom_list);

try {
    URL url = new URL("http://www.webitour.dk/service/localbusiness.aspx?cat="+param);
    SAXParserFactory spf = SAXParserFactory.newInstance();
    SAXParser sp = spf.newSAXParser();

    /* Get the XMLReader of the SAXParser we created. */
    XMLReader xr = sp.getXMLReader();
    /* Create a new ContentHandler and apply it to the XML-Reader*/
    SearchItemHandler searchHandler=new SearchItemHandler();
    xr.setContentHandler(searchHandler);
    xr.parse(new InputSource(url.openStream()));
    SearchItem sItem=searchHandler.getParsedData();

    ArrayList<HashMap<String,String>> list = new ArrayList<HashMap<String,String>>(); 
    HashMap<String,String> item = new HashMap<String,String>();
    item.put("Name",sItem.getItemName());
    item.put("Address", sItem.getItemAddress());
    list.add(item);

    SimpleAdapter adapter = new SimpleAdapter(
            this,
            list,
            R.layout.custom_text_view,
            new String[] {"Name","Address"},
            new int[] {R.id.text1,R.id.text2}
            );

    setListAdapter(adapter);

}catch(Exception e){
}

}

}

SearchItem类:

public class SearchItem {
private String itemName;
private String itemAddress;

public SearchItem(){}

public String getItemName(){
    return this.itemName;
}
public void setItemName(String itemName){
    this.itemName=itemName;
}
public String getItemAddress(){
    return this.itemAddress;
}
public void setItemAddress(String itemAddress){
    this.itemAddress=itemAddress;
}

}

1 个答案:

答案 0 :(得分:1)

我仔细阅读了你的代码然后我发现你犯了很严重的错误。

通过此代码,您只看到了列表中的最后一条记录。

这样做,我提一下。

1-:创建一个带变量的类   public String Name,Address ....

2-:在SearchItemHandler类中创建一个列表。   public static List = new List();   然后   在解析xml时你应该创建一个ClassName的Object(Create Above)   并通过xml getValue设置类的每个数据成员的值   然后把这个对象放在列表中。   在解析结束时,你会在列表中找到三个对象。

3-:在SearchItemListActivity类中访问此列表     并获取每个对象的值并创建一个数组适配器。

4-:将此适配器放入列表中,然后在列表中找到三个项目。

如果您发现任何问题,我希望这是有帮助的,请正确评论。