我在www.ravaana.ml/webservice/1.xml中获得了一个xml 我在这里得到了另一个xml http://www.ravaana.ml/webservice/2.xml 我的应用程序无法读取它。我不知道该怎么做。
以下是代码：
公共类BeritaTerbaru扩展了Fragment {
// All variables
XMLParser parser;
Document doc;
String xml;
ListView lv;
ListViewAdapter adapter;
ArrayList<HashMap<String, String>> menuItems;
ProgressDialog pDialog;
// XML node keys
static final String KEY_ITEM = "item"; // parent node
static final String KEY_ID = "id";
static final String KEY_JUDUL = "judul";
static final String KEY_BERITA = "berita";
// Flag for current page
int current_page = 0;
public void onStart() {
super.onStart();
lv = (ListView) getView().findViewById(R.id.list);
menuItems = new ArrayList<HashMap<String, String>>();
new loadMoreListView().execute();
// LoadMore button
Button btnLoadMore = new Button(getActivity());
btnLoadMore.setText("Load More");
// Adding Load More button to lisview at bottom
lv.addFooterView(btnLoadMore);
// Getting adapter
adapter = new ListViewAdapter(getActivity(), menuItems);
lv.setAdapter(adapter);
/**
* Listening to Load More button click event
* */
btnLoadMore.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// Starting a new async task
new loadMoreListView().execute();
}
});
/**
* Listening to listview single row selected
* **/
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// getting values from selected ListItem
String name = ((TextView) view.findViewById(R.id.name))
.getText().toString();
// Starting new intent
Intent in = new Intent(getActivity(),
SingleMenuItemActivity.class);
in.putExtra(KEY_JUDUL, name);
startActivity(in);
}
});
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_beritaterbaru,
container, false);
return view;
}
/**
* Async Task that send a request to url Gets new list view data Appends to
* list view
* */
private class loadMoreListView extends AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
// Showing progress dialog before sending http request
pDialog = new ProgressDialog(getActivity());
pDialog.setMessage("Please wait..");
pDialog.setIndeterminate(true);
pDialog.setCancelable(false);
pDialog.show();
}
protected Void doInBackground(Void... unused) {
// increment current page
current_page += 1;
// Next page request
String URL = "http://www.ravaana.ml/webservice/" + current_page
+ ".xml";
parser = new XMLParser();
xml = parser.getXmlFromUrl(URL); // getting XML
doc = parser.getDomElement(xml); // getting DOM element
NodeList nl = doc.getElementsByTagName(KEY_ITEM);
// looping through all item nodes <item>
for (int i = 0; i < nl.getLength(); i++) {
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
Element e = (Element) nl.item(i);
// adding each child node to HashMap key => value
map.put(KEY_ID, parser.getValue(e, KEY_ID));
map.put(KEY_JUDUL, parser.getValue(e, KEY_JUDUL));
map.put(KEY_BERITA, parser.getValue(e, KEY_BERITA));
// adding HashList to ArrayList
menuItems.add(map);
}
return null;
}
protected void onPostExecute(Void unused) {
// closing progress dialog
pDialog.dismiss();
// get listview current position - used to maintain scroll position
int currentPosition = lv.getFirstVisiblePosition();
// Appending new data to menuItems ArrayList
adapter = new ListViewAdapter(getActivity(), menuItems);
lv.setAdapter(adapter);
// Setting new scroll position
lv.setSelectionFromTop(currentPosition + 0, 0);
}
}
}
这是logcat
06-26 00:57:30.050: D/dalvikvm(808): GC_FOR_ALLOC freed 206K, 6% free 5068K/5372K, paused 32ms, total 32ms
06-26 00:57:30.060: E/Error:(808): Unexpected token (position:TEXT @1:4 in java.io.StringReader@b4fbbbf0)
06-26 00:57:30.060: W/dalvikvm(808): threadid=11: thread exiting with uncaught exception (group=0xb4aa7b90)
06-26 00:57:30.060: E/AndroidRuntime(808): FATAL EXCEPTION: AsyncTask #1
06-26 00:57:30.060: E/AndroidRuntime(808): Process: info.androidhive.slidingmenu, PID: 808
06-26 00:57:30.060: E/AndroidRuntime(808): java.lang.RuntimeException: An error occured while executing doInBackground()
06-26 00:57:30.060: E/AndroidRuntime(808): at android.os.AsyncTask$3.done(AsyncTask.java:300)
06-26 00:57:30.060: E/AndroidRuntime(808): at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
06-26 00:57:30.060: E/AndroidRuntime(808): at java.util.concurrent.FutureTask.setException(FutureTask.java:222)
06-26 00:57:30.060: E/AndroidRuntime(808): at java.util.concurrent.FutureTask.run(FutureTask.java:242)
06-26 00:57:30.060: E/AndroidRuntime(808): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
06-26 00:57:30.060: E/AndroidRuntime(808): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
06-26 00:57:30.060: E/AndroidRuntime(808): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
06-26 00:57:30.060: E/AndroidRuntime(808): at java.lang.Thread.run(Thread.java:841)
06-26 00:57:30.060: E/AndroidRuntime(808): Caused by: java.lang.NullPointerException
06-26 00:57:30.060: E/AndroidRuntime(808): at info.androidhive.slidingmenu.BeritaTerbaru$loadMoreListView.doInBackground(BeritaTerbaru.java:129)
06-26 00:57:30.060: E/AndroidRuntime(808): at info.androidhive.slidingmenu.BeritaTerbaru$loadMoreListView.doInBackground(BeritaTerbaru.java:1)
06-26 00:57:30.060: E/AndroidRuntime(808): at android.os.AsyncTask$2.call(AsyncTask.java:288)
06-26 00:57:30.060: E/AndroidRuntime(808): at java.util.concurrent.FutureTask.run(FutureTask.java:237)
06-26 00:57:30.060: E/AndroidRuntime(808): ... 4 more
06-26 00:57:32.400: E/WindowManager(808): android.view.WindowLeaked: Activity info.androidhive.slidingmenu.MainActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView{b4f5d9e0 V.E..... R......D 0,0-383,96} that was originally added here
06-26 00:57:32.400: E/WindowManager(808): at android.view.ViewRootImpl.<init>(ViewRootImpl.java:346)
06-26 00:57:32.400: E/WindowManager(808): at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:248)
06-26 00:57:32.400: E/WindowManager(808): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:69)
06-26 00:57:32.400: E/WindowManager(808): at android.app.Dialog.show(Dialog.java:286)
06-26 00:57:32.400: E/WindowManager(808): at info.androidhive.slidingmenu.BeritaTerbaru$loadMoreListView.onPreExecute(BeritaTerbaru.java:116)
06-26 00:57:32.400: E/WindowManager(808): at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:587)
06-26 00:57:32.400: E/WindowManager(808): at android.os.AsyncTask.execute(AsyncTask.java:535)
06-26 00:57:32.400: E/WindowManager(808): at info.androidhive.slidingmenu.BeritaTerbaru.onStart(BeritaTerbaru.java:48)
06-26 00:57:32.400: E/WindowManager(808): at android.app.Fragment.performStart(Fragment.java:1724)
06-26 00:57:32.400: E/WindowManager(808): at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:918)
06-26 00:57:32.400: E/WindowManager(808): at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1062)
06-26 00:57:32.400: E/WindowManager(808): at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1044)
06-26 00:57:32.400: E/WindowManager(808): at android.app.FragmentManagerImpl.dispatchStart(FragmentManager.java:1858)
06-26 00:57:32.400: E/WindowManager(808): at android.app.Activity.performStart(Activity.java:5259)
06-26 00:57:32.400: E/WindowManager(808): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2149)
06-26 00:57:32.400: E/WindowManager(808): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2226)
06-26 00:57:32.400: E/WindowManager(808): at android.app.ActivityThread.access$700(ActivityThread.java:135)
06-26 00:57:32.400: E/WindowManager(808): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1397)
06-26 00:57:32.400: E/WindowManager(808): at android.os.Handler.dispatchMessage(Handler.java:102)
06-26 00:57:32.400: E/WindowManager(808): at android.os.Looper.loop(Looper.java:137)
06-26 00:57:32.400: E/WindowManager(808): at android.app.ActivityThread.main(ActivityThread.java:4998)
06-26 00:57:32.400: E/WindowManager(808): at java.lang.reflect.Method.invokeNative(Native Method)
06-26 00:57:32.400: E/WindowManager(808): at java.lang.reflect.Method.invoke(Method.java:515)
06-26 00:57:32.400: E/WindowManager(808): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:777)
06-26 00:57:32.400: E/WindowManager(808): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:593)
06-26 00:57:32.400: E/WindowManager(808): at dalvik.system.NativeStart.main(Native Method)
06-26 00:57:32.560: I/Process(808): Sending signal. PID: 808 SIG: 9
我已经包含了所需的所有课程，但仍无法运行它。
答案 0 :(得分：0)
试试这个..
protected Void doInBackground(Void... unused) {
current_page += 1;
try {
String urls = "http://www.ravaana.ml/webservice/" + current_page + ".xml";
URL 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(KEY_ITEM);
for (int i = 0; i < nodeList.getLength(); i++) {
HashMap<String, String> map = new HashMap<String, String>();
Node node = nodeList.item(i);
Element fstElmnt = (Element) node;
NodeList nameList = fstElmnt.getElementsByTagName(KEY_ID);
Element nameElement = (Element) nameList.item(0);
nameList = nameElement.getChildNodes();
map.put(KEY_ID, (((Node) nameList.item(0)).getNodeValue()));
Element fstElmnt1 = (Element) node;
NodeList nameList1 = fstElmnt1.getElementsByTagName(KEY_JUDUL);
Element nameElement1 = (Element) nameList1.item(0);
nameList1 = nameElement1.getChildNodes();
map.put(KEY_JUDUL, (((Node) nameList1.item(0)).getNodeValue()));
Element fstElmnt2 = (Element) node;
NodeList nameList2 = fstElmnt2.getElementsByTagName(KEY_BERITA);
Element nameElement2 = (Element) nameList2.item(0);
nameList2 = nameElement2.getChildNodes();
map.put(KEY_BERITA, (((Node) nameElement2.item(0)).getNodeValue()));
menuItems.add(map);
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (ParserConfigurationException e) {
e.printStackTrace();
} catch (SAXException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}