如何使用android从互联网上检索xml的所有值。我找到了一个很好的教程并实现了它http://www.anddev.org/novice-tutorials-f8/parsing-xml-from-the-net-using-the-saxparser-t353.html，但我只能检索我的xml的最后一项:(我想在简单的ListView中显示结果
这是我在互联网http://www.rahmanrahim.com/webservicekos/allkos托管的xml文件（抱歉，我无法正确发布）
这是我的MainActivity.java
package com.example.cobaxmlparser;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.InputSource;
import org.xml.sax.XMLReader;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.os.Bundle;
import android.os.StrictMode;
import android.util.Log;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
public class MainActivity extends Activity {
/** Called when the activity is first created. */
@SuppressLint("NewApi")
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.activity_main);
/* Create a new TextView to display the parsingresult later. */
TextView tv = new TextView(this);
ListView view = (ListView) findViewById(R.id.view);
String[] hasilXml = new String[21];
int x = 0;
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
try {
/* Create a URL we want to load some xml-data from. */
URL url = new URL("http://www.rahmanrahim.com/webservicekos/allkos");
HttpURLConnection urlConnection = (HttpURLConnection)url.openConnection();
//URLConnection urlConnection = url.openConnection();
urlConnection.setRequestMethod("GET");
urlConnection.setDoOutput(true);
urlConnection.connect();
/* Get a SAXParser from the SAXPArserFactory. */
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*/
ExampleHandler myExampleHandler = new ExampleHandler();
xr.setContentHandler(myExampleHandler);
/* Parse the xml-data from our URL. */
xr.parse(new InputSource(url.openStream()));
/* Parsing has finished. */
/* Our ExampleHandler now provides the parsed data to us. */
ParsedExampleDataSet parsedExampleDataSet =
myExampleHandler.getParsedData();
/* Set the result to be displayed in our GUI. */
//tv.setText(parsedExampleDataSet.toString());
//String cek = parsedExampleDataSet.toString(x);
hasilXml[x] = parsedExampleDataSet.toString();
x++;
System.out.println("nilai x adalah : " + x);
//tv.setText(cek);
} catch (Exception e) {
/* Display any Error to the GUI. */
tv.setText("Error: " + e.getMessage());
Log.e(MY_DEBUG_TAG, "WeatherQueryError", e);
}
/* Display the TextView. */
//this.setContentView(tv);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, hasilXml);
view.setAdapter(adapter);
}
}
这是我的ExampleHandler.java
package com.example.cobaxmlparser;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
public class ExampleHandler extends DefaultHandler{
// ===========================================================
// Fields
// ===========================================================
private boolean in_outertag = false;
private boolean in_innertag = false;
private boolean in_id_kos = false;
private boolean in_nama = false;
private boolean in_latitude = false;
private boolean in_longitude = false;
private boolean in_harga = false;
private boolean in_tampakdepan = false;
private boolean in_streetview = false;
private boolean in_alamat = false;
private ParsedExampleDataSet myParsedExampleDataSet = new ParsedExampleDataSet();
// ===========================================================
// Getter & Setter
// ===========================================================
public ParsedExampleDataSet getParsedData() {
return this.myParsedExampleDataSet;
}
// ===========================================================
// Methods
// ===========================================================
@Override
public void startDocument() throws SAXException {
this.myParsedExampleDataSet = new ParsedExampleDataSet();
}
@Override
public void endDocument() throws SAXException {
// Nothing to do
}
/** Gets be called on opening tags like:
* <tag>
* Can provide attribute(s), when xml was like:
* <tag attribute="attributeValue">*/
@Override
public void startElement(String namespaceURI, String localName,
String qName, Attributes atts) throws SAXException {
if(localName.equals("xml"))
{
this.in_outertag = true;
}
else if (localName.equals("item")) {
this.in_innertag = true;
}else if (localName.equals("id_kos")) {
this.in_id_kos = true;
}else if (localName.equals("nama"))
{
this.in_nama = true;
}else if (localName.equals("alamat"))
{
this.in_alamat = true;
}else if (localName.equals("latitude"))
{
this.in_latitude = true;
}else if (localName.equals("longitude"))
{
this.in_longitude = true;
}else if (localName.equals("harga"))
{
this.in_harga = true;
}else if (localName.equals("tampakdepan"))
{
this.in_tampakdepan = true;
}else if (localName.equals("streetview"))
{
this.in_streetview = true;
}
}
/** Gets be called on closing tags like:
* </tag> */
@Override
public void endElement(String namespaceURI, String localName, String qName)
throws SAXException {
if(localName.equals("xml"))
{
this.in_outertag = false;
}
else if (localName.equals("item")) {
this.in_innertag = false;
}else if (localName.equals("id_kos")) {
this.in_id_kos = false;
}else if (localName.equals("nama"))
{
this.in_nama = false;
}else if (localName.equals("alamat"))
{
this.in_alamat = false;
}else if (localName.equals("latitude"))
{
this.in_latitude = false;
}else if (localName.equals("longitude"))
{
this.in_longitude = false;
}else if (localName.equals("harga"))
{
this.in_harga = false;
}else if (localName.equals("tampakdepan"))
{
this.in_tampakdepan = false;
}else if (localName.equals("streetview"))
{
this.in_streetview = false;
}
}
/** Gets be called on the following structure:
* <tag>characters</tag> */
@Override
public void characters(char ch[], int start, int length) {
if(this.in_id_kos){
myParsedExampleDataSet.setId_kos(new String(ch, start, length));
}if(this.in_nama){
myParsedExampleDataSet.setNama(new String(ch, start, length));
}if(this.in_alamat){
myParsedExampleDataSet.setAlamat(new String(ch, start, length));
}if(this.in_latitude){
myParsedExampleDataSet.setLatitude(new String(ch, start, length));
}if(this.in_longitude){
myParsedExampleDataSet.setLongitude(new String(ch, start, length));
}if(this.in_harga){
myParsedExampleDataSet.setHarga(new String(ch, start, length));
}if(this.in_tampakdepan){
myParsedExampleDataSet.setTampakdepan(new String(ch, start, length));
}if(this.in_streetview){
myParsedExampleDataSet.setStreetview(new String(ch, start, length));
}
}
}
和最后一个ParsedExampleDataSet.java
public class ParsedExampleDataSet
{
private String id_kos = null;
private String nama = null;
private String alamat = null;
private String latitude = null;
private String longitude = null;
private String harga = null;
private String tampakdepan = "";
private String streetview = "";
public String getId_kos() {
return id_kos;
}
public void setId_kos(String id_kos) {
this.id_kos = id_kos;
}
public String getNama() {
return nama;
}
public void setNama(String nama) {
this.nama = nama;
}
public String getAlamat() {
return alamat;
}
public void setAlamat(String alamat) {
this.alamat = alamat;
}
public String getLatitude() {
return latitude;
}
public void setLatitude(String latitude) {
this.latitude = latitude;
}
public String getLongitude() {
return longitude;
}
public void setLongitude(String longitude) {
this.longitude = longitude;
}
public String getHarga() {
return harga;
}
public void setHarga(String harga) {
this.harga = harga;
}
public String getTampakdepan() {
return tampakdepan;
}
public void setTampakdepan(String tampakdepan) {
this.tampakdepan = tampakdepan;
}
public String getStreetview() {
return streetview;
}
public void setStreetview(String streetview) {
this.streetview = streetview;
}
public String toString(){
return "id_kos "+this.id_kos+" nama "+this.nama+" alamat "+this.alamat+" latitude "+this.latitude+" longitude "+this.longitude+" harga "+this.harga+" tampak depan "+this.tampakdepan+" street view "+this.streetview;
}
}
从上面的代码我只能得到最后一项 任何帮助都会很棒。我是android的新手，抱歉我的英文不好。 感谢
答案 0 :(得分：1)
试试这个..
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
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.os.AsyncTask;
import android.os.Build;
import android.os.Bundle;
import android.annotation.TargetApi;
import android.app.Activity;
import android.app.ProgressDialog;
import android.view.Menu;
import android.widget.ArrayAdapter;
import android.widget.ListView;
public class MainActivity extends Activity {
String url = "http://www.rahmanrahim.com/webservicekos/allkos";
ProgressDialog pDialog;
ArrayList<String> hasilXml = new ArrayList<String>();
ListView view;
@TargetApi(Build.VERSION_CODES.HONEYCOMB)
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
view = (ListView) findViewById(R.id.view);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB)
new XmlParsing(url).executeOnExecutor(
AsyncTask.THREAD_POOL_EXECUTOR, new String[] { null });
else
new XmlParsing(url).execute(new String[] { null });
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
public class XmlParsing extends AsyncTask<String, Void, String> {
// variables passed in:
String urls;
// constructor
public XmlParsing(String urls) {
this.urls = urls;
}
@Override
protected void onPreExecute() {
pDialog = ProgressDialog.show(NetActivity.this,
"Fetching Details..", "Please wait...", true);
}
@Override
protected String doInBackground(String... params) {
// TODO Auto-generated method stub
URL url;
try {
url = new URL(urls);
DocumentBuilderFactory dbf = DocumentBuilderFactory
.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
Document doc = db.parse(new InputSource(url.openStream()));
doc.getDocumentElement().normalize();
NodeList nodeList = doc.getElementsByTagName("item");
for (int i = 0; i < nodeList.getLength(); i++) {
Node node = nodeList.item(i);
Element fstElmnt = (Element) node;
NodeList nameList = fstElmnt.getElementsByTagName("id_kos");
Element nameElement = (Element) nameList.item(0);
nameList = nameElement.getChildNodes();
System.out.println("id_kos : "
+ ((Node) nameList.item(0)).getNodeValue());
Element fstElmnt1 = (Element) node;
NodeList nameList1 = fstElmnt1.getElementsByTagName("nama");
Element nameElement1 = (Element) nameList1.item(0);
nameList1 = nameElement1.getChildNodes();
System.out.println("nama : "
+ ((Node) nameList1.item(0)).getNodeValue());
Element fstElmnt2 = (Element) node;
NodeList nameList2 = fstElmnt2
.getElementsByTagName("alamat");
Element nameElement2 = (Element) nameList2.item(0);
nameList2 = nameElement2.getChildNodes();
System.out.println("alamat : "
+ ((Node) nameList2.item(0)).getNodeValue());
Element fstElmnt3 = (Element) node;
NodeList nameList3 = fstElmnt3
.getElementsByTagName("latitude");
Element nameElement3 = (Element) nameList3.item(0);
nameList3 = nameElement3.getChildNodes();
System.out.println("latitude : "
+ ((Node) nameList3.item(0)).getNodeValue());
Element fstElmnt4 = (Element) node;
NodeList nameList4 = fstElmnt4
.getElementsByTagName("longitude");
Element nameElement4 = (Element) nameList4.item(0);
nameList4 = nameElement4.getChildNodes();
System.out.println("longitude : "
+ ((Node) nameList4.item(0)).getNodeValue());
Element fstElmnt5 = (Element) node;
NodeList nameList5 = fstElmnt5
.getElementsByTagName("harga");
Element nameElement5 = (Element) nameList5.item(0);
nameList5 = nameElement5.getChildNodes();
System.out.println("harga : "
+ ((Node) nameList5.item(0)).getNodeValue());
Element fstElmnt6 = (Element) node;
NodeList nameList6 = fstElmnt6
.getElementsByTagName("tampakdepan");
Element nameElement6 = (Element) nameList6.item(0);
nameList6 = nameElement6.getChildNodes();
System.out.println("tampakdepan : "
+ ((Node) nameList6.item(0)).getNodeValue());
hasilXml.add("id_kos : "
+ ((Node) nameList.item(0)).getNodeValue()
+ "nama : "
+ ((Node) nameList1.item(0)).getNodeValue()
+ "alamat : "
+ ((Node) nameList2.item(0)).getNodeValue()
+ "latitude : "
+ ((Node) nameList3.item(0)).getNodeValue()
+ "longitude : "
+ ((Node) nameList4.item(0)).getNodeValue()
+ "harga : "
+ ((Node) nameList5.item(0)).getNodeValue()
+ "tampakdepan : "
+ ((Node) nameList6.item(0)).getNodeValue());
}
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ParserConfigurationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SAXException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(String result) {
// Now we have your JSONObject, play around with it.
if (pDialog.isShowing())
pDialog.dismiss();
ArrayAdapter<String> adapter = new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_list_item_1, hasilXml);
view.setAdapter(adapter);
}
}
}
答案 1 :(得分：0)
您正在ui线程上运行与网络相关的操作。
移动
HttpURLConnection urlConnection = (HttpURLConnection)url.openConnection();
到thread或AsyncTask
解析xml使用XmlPullParser。以下链接中有示例。
http://developer.android.com/training/basics/network-ops/xml.html