Android之SAX解析Xml檔案實現

public class JokeBean {
private String id;
private String title;
private StringBuilder text=new StringBuilder();
public JokeBean(){
    }

public String getId() {
return id;
    }

public void setId(String id) {
this.id = id;
    }

public String getTitle() {
return title;
    }

public void setTitle(String title) {
this.title = title;
    }

public String getText() {
return text.toString();
    }

public void setText(String text) {
this.text.append(text);
    }
}

然後是解析類，繼承DefaultHandler類：

public class SAXHandler extends DefaultHandler{
private static final String TAG = "SAXHandler";
private List<JokeBean> data;
private JokeBean joke;
private String preTAG;

private static final String JOKE="joke";
private static final String JOKE_ID="id";
private static final String JOKE_TITLE="title";
private static final String JOKE_TEXT="text";

public SAXHandler(List<JokeBean> data){
super();
this.data = data;
    }

    @Override
public void startDocument() throws SAXException {
if(data==null)
            data=new ArrayList<JokeBean>();
        Log.d(TAG, "startDocument ------- :");
super.startDocument();
    }
    @Override
public void endDocument() throws SAXException {
        Log.d(TAG, "endDocument ------- :");
super.endDocument();
    }

    @Override
public void startElement(String uri, String localName, String qName,
            Attributes attributes) throws SAXException {
        Log.d(TAG, "endDocument ------- :localName "+localName);

        preTAG = localName;
if(JOKE.equals(localName)){
            joke=new JokeBean();
        }

super.startElement(uri, localName, qName, attributes);
    }

    @Override
public void endElement(String uri, String localName, String qName)
throws SAXException {
        preTAG = "";
if(JOKE.equals(localName)){
            data.add(joke);
            Log.d(TAG, "endElement ------- :一個解析對象完成 。。。。 ");
        }
super.endElement(uri, localName, qName);
    }

    @Override
public void characters(char[] ch, int start, int length)
throws SAXException {
        String info = new String(ch,start,length);  
        Log.d(TAG, "characters ------- : info" +info);
if(preTAG.equals(JOKE_ID)){
            joke.setId(info);
        }else if(preTAG.equals(JOKE_TITLE)){
            joke.setTitle(info);
        }else if(preTAG.equals(JOKE_TEXT)){
            joke.setText(info);
        }
super.characters(ch, start, length);
    }

public List<JokeBean> getdata(){
return data;
    }
}

封裝解析xml的工具類，方便用戶端調用：

public class XMLUtil {

public static List<JokeBean> parserXML(Context context,int rawId){
        List<JokeBean> data = new ArrayList<JokeBean>();
        SAXParserFactory factory=SAXParserFactory.newInstance();
        XMLReader reader;
try {
            reader = factory.newSAXParser().getXMLReader();
            reader.setContentHandler(new SAXHandler(data)); 
            InputSource is = new InputSource(context.getResources().openRawResource(rawId));
            is.setEncoding("utf-8");
            reader.parse(is); 
        } catch (Exception e) {
            e.printStackTrace();
        } 
return data;
    }
}

用戶端主類代碼：

public class MainActivity extends Activity implements OnClickListener {
/** Called when the activity is first created. */
    Button btnSAX, btnOutput;
    EditText memo;
private List<JokeBean> data;

    @Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        memo = (EditText)findViewById(R.id.EditText01);
        findViewById(R.id.btnOutput).setOnClickListener(this);
    }

public void onClick(View v) {
if(v.getId()==R.id.btnOutput){
            mHandler.post(new Runnable() {
public void run() {
                     data=XMLUtil.parserXML(MainActivity.this,R.raw.joke2);
                     memo.setText(data.get(0).getText());
                }
            });
        }
    }
private Handler mHandler = new Handler();
}

xml的格式：

<?xml version="1.0" encoding="UTF-8" ?> 
<jokes>
<joke>
<id>1</id>
<title>笑話一</title>
<text><![CDATA[我愛人民]]></text>
</joke>
</jokes>

參考：

http://blog.csdn.net/boyupeng/article/details/6304827