1.準備一個xml檔，放置網路上，輸入資訊如網址內容
http://terryyamg.3eeweb.com/ea_103052/drink.xml
2./res/layout/main.xml
3./res/layout/list_item.xml --自訂ListView的layout
4.XMLParser.java --解析頁
package com.androidhive.xmlparsing;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.StringReader;
import java.io.UnsupportedEncodingException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import android.util.Log;
public class XMLParser {
// constructor
public XMLParser() {
}
/**
* Getting XML from URL making HTTP request
* @param url string
* */
public String getXmlFromUrl(String url) {
String xml = null;
try {
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
/*處理編碼問題*/
InputStream inputStream = httpEntity.getContent();
BufferedReader bufReader = new BufferedReader(new InputStreamReader(inputStream, "utf-8"), 8);
Log.i("bufReader", bufReader+"");
StringBuilder builder = new StringBuilder();
String line = null;
while((line = bufReader.readLine()) != null) {
builder.append(line + "\n");
}
inputStream.close();
xml = builder.toString();
// xml = EntityUtils.toString(httpEntity);
Log.i("xml", xml+"");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
// return XML
return xml;
}
/**
* Getting XML DOM element
* @param XML string
* */
public Document getDomElement(String xml){
Document doc = null;
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
try {
DocumentBuilder db = dbf.newDocumentBuilder();
InputSource is = new InputSource();
is.setCharacterStream(new StringReader(xml));
doc = db.parse(is);
} catch (ParserConfigurationException e) {
Log.e("Error: ", e.getMessage());
return null;
} catch (SAXException e) {
Log.e("Error: ", e.getMessage());
return null;
} catch (IOException e) {
Log.e("Error: ", e.getMessage());
return null;
}
return doc;
}
/** Getting node value
* @param elem element
*/
public final String getElementValue( Node elem ) {
Node child;
if( elem != null){
if (elem.hasChildNodes()){
for( child = elem.getFirstChild(); child != null; child = child.getNextSibling() ){
if( child.getNodeType() == Node.TEXT_NODE ){
return child.getNodeValue();
}
}
}
}
return "";
}
/**
* Getting node value
* @param Element node
* @param key string
* */
public String getValue(Element item, String str) {
NodeList n = item.getElementsByTagName(str);
return this.getElementValue(n.item(0));
}
}
5.AndroidXMLParsingActivity.java --主頁
package com.androidhive.xmlparsing;
import java.util.ArrayList;
import java.util.HashMap;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import android.app.ListActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
import android.widget.Toast;
public class AndroidXMLParsingActivity extends ListActivity {
static final String URL = "http://terryyamg.3eeweb.com/ea_103052/drink.xml"; // 資料網址
// XML node keys
static final String KEY_ITEM = "item"; // 網址上的<item> node
static final String KEY_ID = "id"; // 網址上的<id> node
static final String KEY_NAME = "name"; // 網址上的<name> node
static final String KEY_COST = "cost"; // 網址上的<cost> node
static final String KEY_DESC = "description"; // 網址上的<description> node
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ArrayList<HashMap<String, String>> menuItems = new ArrayList<HashMap<String, String>>();
XMLParser parser = new XMLParser();
String xml = parser.getXmlFromUrl(URL); // 從網路上drink.xml取得資訊
Document doc = parser.getDomElement(xml); // 從xml取得DOM元素
NodeList nl = doc.getElementsByTagName(KEY_ITEM); // 取得<item>裡的資訊
/* 迴圈取得幾筆(nl.getLength())資料並對應放至map */
for (int i = 0; i < nl.getLength(); i++) {
HashMap<String, String> map = new HashMap<String, String>(); // 建立HashMap
Element e = (Element) nl.item(i);
/* 對應值 key => value */
map.put(KEY_ID, parser.getValue(e, KEY_ID));
map.put(KEY_NAME, parser.getValue(e, KEY_NAME));
map.put(KEY_COST, "NT." + parser.getValue(e, KEY_COST));
map.put(KEY_DESC, parser.getValue(e, KEY_DESC));
Log.i("map", map + "");
menuItems.add(map); // map加入到menuItems
}
/* menuItems加入到ListView */
ListAdapter adapter = new SimpleAdapter(this, menuItems,
R.layout.list_item, // 對應自訂的layout
new String[] { KEY_NAME, KEY_DESC, KEY_COST }, new int[] {
R.id.name, R.id.desciption, R.id.cost });
setListAdapter(adapter);
/* 選中ListView項目 */
ListView lv = getListView();
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
/* 取得選中的項目值 */
String name = ((TextView) view.findViewById(R.id.name))
.getText().toString();
String cost = ((TextView) view.findViewById(R.id.cost))
.getText().toString();
String description = ((TextView) view
.findViewById(R.id.desciption)).getText().toString();
Toast.makeText(view.getContext(),
"您點選的是" + name + "\n總共" + cost + "\n注意:" + description,
Toast.LENGTH_LONG).show();
}
});
}
}
檔案下載:
https://github.com/terryyamg/AndroidXMLParsing
參考來源:
http://www.androidhive.info/2011/11/android-xml-parsing-tutorial/
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