SAX解析器从SAX元素获取属性

Question

我使用SAX解析器，当我使用：

public void startElement(String uri, String localName, String qName,
        Attributes attributes) throws SAXException

我可以得到属性。但我需要从public endElement获取属性。

要解析类似的内容：

<item name="test" value="somedata" />

代码：

公共类SAXXMLHandler扩展DefaultHandler {

private ArrayList<itemsList> items;
private String tempVal;
private itemsList tempEmp;

private PackageManager manager;
private String packName;

public SAXXMLHandler(PackageManager manager, String packName) {
    items = new ArrayList<itemsList>();

    this.manager = manager;
    this.packName = packName;

}

public void characters(char[] ch, int start, int length)
        throws SAXException {
    tempVal = new String(ch, start, length);
}

// Event Handlers
public void startElement(String uri, String localName, String qName,
        Attributes attributes) throws SAXException {
    Log.d("INFO", "startElement " + localName + ", " + qName + ", " + attributes);
    // reset
    tempVal = "";
    if (qName.equalsIgnoreCase("item")) {
        // create a new instance of employee
        tempEmp = new itemsList();
        tempEmp.setName(attributes.getValue("name"));
    }
}

public void endElement(String uri, String localName, String qName)
        throws SAXException {
    Log.d("INFO", "endElement " + localName + ", " + qName);

}

也不要在startElement上写日志

更新

我用零碎的：

SAXXMLHandler handler = new SAXXMLHandler();
            SAXParserFactory factory = SAXParserFactory.newInstance();
            SAXParser saxParser = factory.newSAXParser();
            saxParser.parse(asset, handler);
            items = SAXXMLHandler.icons;

            Util.l(String.valueOf(SAXXMLHandler.icons.size())); //log
            for(itemList item:SAXXMLHandler.icons)
            {
                Util.l(item.getComponent()+"\t\t"+item.getComponent()); //log
            }

SAXXMLHandler看：

public class SAXXMLHandler extends DefaultHandler {

    public static ArrayList<itemsList> items;
    private itemsList item;

    public SAXXMLHandler() {
        items = new ArrayList<itemsList>();
    }

    public void characters(char[] ch, int start, int length)
            throws SAXException {

    }

    public void startElement(String uri, String localName, String qName,
            Attributes attributes) throws SAXException {
        item = new itemsList();
        Log.d("INFO", "startElement " + localName + ", " + qName);
        if (qName.equalsIgnoreCase("item")) {
            item.setComponent(attributes.getValue("component"));
            items.add(item);
        }
    }

    public void endElement(String uri, String localName, String qName)
            throws SAXException {

    }
}

仍然什么也没有/

我解析http://pastebin.com/5GEthfmU的其他应用程序中的XML文件

Answer 1

将System.out.println更改为ur Log.ins .

项目.java

package com.rofl;

public class Item {

    private String component;

    private String  drawable;

    public String getComponent() {
        return component;
    }

    public void setComponent(String component) {
        this.component = component;
    }

    public String getDrawable() {
        return drawable;
    }

    public void setDrawable(String drawable) {
        this.drawable = drawable;
    }



}

SAXXMLHandler .java

    package com.rofl;

import java.util.ArrayList;
import java.util.List;

import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

public class SAXXMLHandler extends DefaultHandler {



    public static void main(String argv[]) {

        try {

            SAXParserFactory factory = SAXParserFactory.newInstance();
            SAXParser saxParser = factory.newSAXParser();
            SAXXMLHandler handler = new SAXXMLHandler();
            saxParser.parse("src/file.xml", handler);
            System.out.println(SAXXMLHandler.itemList.size());
            for(Item item:itemList)
            {
                System.out.println(item.getComponent()+"\t\t"+item.getDrawable());
            }
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

    public static List<Item> itemList = new ArrayList<Item>();

    private Item item;

    public SAXXMLHandler() {
        itemList = new ArrayList<Item>();

    }

    public void characters(char[] ch, int start, int length)
            throws SAXException {

    }

    public void startElement(String uri, String localName, String qName,
            Attributes attributes) throws SAXException {
        item = new Item();
        if (qName.equalsIgnoreCase("item")) {
            item.setComponent(attributes.getValue("component"));
            item.setDrawable(attributes.getValue("drawable"));
            itemList.add(item);

        }
    }

    public void endElement(String uri, String localName, String qName)
            throws SAXException {

    }
}

产出如下：

8
ComponentInfo{com.designrifts.ultimatethemeui/ultimatethemeui.themeactivity}        icon
ComponentInfo{com.chrislacy.actionlauncher.pro/com.chrislacy.launcher.Launcher}     apps_actionlauncherpro
ComponentInfo{com.teslacoilsw.launcher/com.android.launcher2.Launcher}      apps_novalauncher
ComponentInfo{com.teslacoilsw.launcher.prime/.NovaLauncherPrimeActivity}        apps_novalauncher
ComponentInfo{com.anddoes.launcher/com.anddoes.launcher.Launcher}       apps_apexlauncher
ComponentInfo{com.anddoes.launcher.pro/com.anddoes.launcher.pro.ApexLauncherProActivity}        apps_apexlauncher
ComponentInfo{org.adw.launcher/org.adw.launcherlib.Launcher}        apps_adwlauncher
ComponentInfo{org.adwfreak.launcher/org.adw.launcherlib.Launcher}       apps_adwex

Answer 2

在给定的XML行中。

<item name="test" value="somedata" />

name和value是只能在startElement()方法中检索的属性。因为，Attributes attributes参数只传递给startElement(String uri, String localName, String qName, Attributes attributes)方法。如果您查看endElement(String uri, String localName, String qName)方法，就会发现没有Attributes attributes。这就是为什么不能从endElement()方法中检索任何属性的原因。因此，如果您想从一个attributes中检索任何XML，那么就必须在startElement(String uri, String localName, String qName, Attributes attributes)方法中检索它们。