アンドロイドの最良の方法で解析XMLのは、SAXParserのを使用することです。私はデモで腹を立てて説明しました....
まず、bellwのようなアクティビティクラスを作成します。
public class ActivityForSax extends ListActivity {
private ProgressDialog pDialog;
private ItemXMLHandler myXMLHandler;
private String rssFeed = "https://www.dropbox.com/s/t4o5wo6gdcnhgj8/imagelistview.xml?dl=1";
private TextView textview;
private ListView mListView;
private ArrayList<HashMap<String, String>> menuItems;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.xml_dom);
textview = (TextView)findViewById(R.id.textView1);
doParsing();
mListView = getListView();
}
public void doParsing(){
if (isNetworkAvailable()) {
textview.setText("Loading...Please wait...");
new AsyncData().execute(rssFeed);
} else {
showToast("No Network Connection!!!");
}
}
class AsyncData extends AsyncTask<String, Void, Void> {
@Override
protected void onPreExecute() {
menuItems = new ArrayList<HashMap<String, String>>();
pDialog = new ProgressDialog(ActivityForSax.this);
pDialog.setTitle("Loading....");
pDialog.setMessage("Please wait...");
pDialog.show();
super.onPreExecute();
}
@Override
protected Void doInBackground(String... params) {
try {
SAXParserFactory spf = SAXParserFactory.newInstance();
SAXParser sp = spf.newSAXParser();
XMLReader xr = sp.getXMLReader();
myXMLHandler = new ItemXMLHandler();
xr.setContentHandler(myXMLHandler);
URL _url = new URL(params[0]);
xr.parse(new InputSource(_url.openStream()));
} catch (ParserConfigurationException pce) {
Log.e("SAX XML", "sax parse error", pce);
} catch (SAXException se) {
Log.e("SAX XML", "sax error", se);
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
textview.setText("Done!!!");
if (pDialog != null && pDialog.isShowing()) {
pDialog.dismiss();
}
ArrayList<Bean> itemsList = myXMLHandler.getItemsList();
for (int i = 0; i < itemsList.size(); i++) {
Bean objBean = itemsList.get(i);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
map.put("TITLE :: ", objBean.getTitle());
map.put("DESC :: ", objBean.getDesc());
map.put("PUBDATE :: ", objBean.getPubDate());
// adding HashList to ArrayList
menuItems.add(map);
}
// Adding menuItems to ListView
ListAdapter adapter = new SimpleAdapter(ActivityForSax.this, menuItems,
R.layout.list_item,
new String[] { "TITLE :: ", "DESC :: ", "PUBDATE :: " }, new int[] {
R.id.name, R.id.email, R.id.mobile });
mListView.setAdapter(adapter);
}
}
public void showToast(String msg) {
Toast.makeText(ActivityForSax.this, msg, Toast.LENGTH_LONG).show();
}
public boolean isNetworkAvailable() {
ConnectivityManager connectivity = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
if (connectivity == null) {
return false;
} else {
NetworkInfo[] info = connectivity.getAllNetworkInfo();
if (info != null) {
for (int i = 0; i < info.length; i++) {
if (info[i].getState() == NetworkInfo.State.CONNECTED) {
return true;
}
}
}
}
return false;
}
}
xmlデータを解析するためのデフォルトハンドラクラスを作成する必要があります。
public class ItemXMLHandler extends DefaultHandler {
Boolean currentElement = false;
String currentValue = "";
Bean item = null;
private ArrayList<Bean> itemsList = new ArrayList<Bean>();
public ArrayList<Bean> getItemsList() {
return itemsList;
}
// Called when tag starts
@Override
public void startElement(String uri, String localName, String qName,
Attributes attributes) throws SAXException {
currentElement = true;
currentValue = "";
if (localName.equals("item")) {
item = new Bean();
}
}
// Called when tag closing
@Override
public void endElement(String uri, String localName, String qName)
throws SAXException {
currentElement = false;
if (localName.equals("id")) {
item.setId(currentValue);
} else if (localName.equals("title")) {
item.setTitle(currentValue);
} else if (localName.equals("desc")) {
item.setDesc(currentValue);
} else if (localName.equals("pubDate")) {
item.setPubDate(currentValue);
} else if (localName.equals("link")) {
item.setLink(currentValue);
} else if (localName.equals("item")) {
itemsList.add(item);
}
}
// Called to get tag characters
@Override
public void characters(char[] ch, int start, int length)
throws SAXException {
if (currentElement) {
currentValue = currentValue + new String(ch, start, length);
}
}
}
、最終的にはあなたのBeanクラスなどのような...
public class Bean {
private String id;
private String title;
private String desc;
private String pubDate;
private String link;
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 getDesc() {
return desc;
}
public void setDesc(String desc) {
this.desc = desc;
}
public String getPubDate() {
return pubDate;
}
public void setPubDate(String pubDate) {
this.pubDate = pubDate;
}
public String getLink() {
return link;
}
public void setLink(String link) {
this.link = link;
}
}
これは、DOMパーサに関して私の質問とはまったく関係ありませんでした。 –
私の答えの始めにSAX Parserを使うことができるのはなぜなのでしょう？ – Nitin