Android XML阅读器出错
[英]Error with Android XML reader
问题描述
I have an XML parser that works correctly, but if the User is connected to a network that are not browsing the app breaks. 
我有一个XML解析器，可以正常工作，但是如果用户连接到未浏览应用程序的网络，则会中断。 To put a function to detect whether or not the User is connected, but the problem mentioned above, the User would be connected but no browsing. 为了放置检测用户是否已连接但上述问题的功能，用户将被连接但没有浏览。
My code follows in full: 我的代码完全如下：
public void chamaParser(){
Boolean conected = Conectado(this);
if(conected == true){
new DoInBackground().execute();
} else {
mPullRefreshListViewRSS.onRefreshComplete();
new AlertDialog.Builder(PullToRefreshListActivityRSS.this)
.setTitle("Alerta!")
.setMessage("Não foi possível estabelecer uma conexão com a Internet, verifique sua rede ou tente novamente mais tarde.")
.setNeutralButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {}
}).show();
}
}
public void do_update() {
RssParser.parse();
}
public static boolean Conectado(Context context) {
try {
ConnectivityManager cm = (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);
String LogSync = null;
String LogToUserTitle = null;
if (cm.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).isConnected()) {
LogSync += "\nConectado a Internet 3G ";
LogToUserTitle += "Conectado a Internet 3G ";
return true;
} else if(cm.getNetworkInfo(ConnectivityManager.TYPE_WIFI).isConnected()) {
LogSync += "\nConectado a Internet WIFI ";
LogToUserTitle += "Conectado a Internet WIFI ";
return true;
} else {
LogSync += "\nNão possui conexão com a internet ";
LogToUserTitle += "Não possui conexão com a internet ";
return false;
}
} catch (Exception e) {
return false;
}
}
private class DoInBackground extends AsyncTask<Void, Void, Void> implements DialogInterface.OnCancelListener {
private ProgressDialog dialog;
protected void onPreExecute() {
//dialog = ProgressDialog.show(PullToRefreshListActivityRSS.this, "", "Carregando...", true);
dialog = ProgressDialog.show(PullToRefreshListActivityRSS.this, "", "Carregando...", true, true, new DialogInterface.OnCancelListener(){
@Override
public void onCancel(DialogInterface dialog) {
mPullRefreshListViewRSS.onRefreshComplete();
DoInBackground.this.cancel(true);
// finish();
}
});
}
protected Void doInBackground(Void... unused) {
PodcastAdapterRSS.topBarRSS=true;
do_update();
return null;
}
Parser XML: 解析器XML：
public class RssParser {
public static void parse() {
URL url;
try {
url = new URL("http://www.xxxx.com.br/feed/");
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
if(conn.getResponseCode() == HttpURLConnection.HTTP_OK) {
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
Document doc;
doc = db.parse(url.openStream());
doc.getDocumentElement().normalize();
NodeList itemLst = doc.getElementsByTagName("item");
arrays.Title = new String[itemLst.getLength()];
arrays.Link = new String[itemLst.getLength()];
arrays.Description = new String[itemLst.getLength()];
// arrays.PodcastMedia = new String[itemLst.getLength()];
for(int i=0; i < itemLst.getLength(); i++){
Node item = itemLst.item(i);
if(item.getNodeType() == Node.ELEMENT_NODE){
Element ielem = (Element)item;
NodeList title = ielem.getElementsByTagName("title");
NodeList link = ielem.getElementsByTagName("link");
//NodeList description = ielem.getElementsByTagName("description");
NodeList content = ielem.getElementsByTagName("description");
// NodeList media = ielem.getElementsByTagName("media:content");
// String mediaurl = media.item(0).getAttributes().getNamedItem("url").getNodeValue();
arrays.Title[i] = title.item(0).getChildNodes().item(0).getNodeValue();
arrays.Link[i] = link.item(0).getChildNodes().item(0).getNodeValue();
arrays.Description[i] = content.item(0).getChildNodes().item(0).getNodeValue();
}
}
}
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (DOMException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException 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();
}
}
}
Log Cat: 日志猫：
07-30 15:20:48.319: W/System.err(10997): java.net.UnknownHostException: www.xxxx.com.br 07-30 15:20:48.319: W/System.err(10997): at java.net.InetAddress.lookupHostByName(InetAddress.java:508) 07-30 15:20:48.319: W/System.err(10997): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:296) 07-30 15:20:48.319: W/System.err(10997): at java.net.InetAddress.getAllByName(InetAddress.java:258) 07-30 15:20:48.319: W/System.err(10997): at org.apache.harmony.luni.internal.net.www.protocol.http.HttpConnection.(HttpConnection.java:69) 07-30 15:20:48.319: W/System.err(10997): at org.apache.harmony.luni.internal.net.www.protocol.http.HttpConnection.(HttpConnection.java:48) 07-30 15:20:48.319: W/System.err(10997): at org.apache.harmony.luni.internal.net.www.protocol.http.HttpConnection$Address.connect(HttpConnection.java:322) 07-30 15:20:48.319: W/System.err(10997): at org.apache.harmony.luni.internal.net.www.protocol.http.HttpConnectionPool.get(HttpConnectionPool.java:89) 07-30 15:20:48.319: W
2 个解决方案
解决方案1
0 2012-07-30 18:38:54
Try adding this to your manifest: 尝试将其添加到清单中：
<uses-permission android:name="android.permission.INTERNET" />
If that doesn't work, consult the answers to these two questions: 如果这不起作用，请参考以下两个问题的答案：
Android java.net.UnknownHostException: Host is unresolved Android java.net.UnknownHostException：无法解析主机
Android java.net.UnknownHostException: Host is unresolved (strategy question) Android java.net.UnknownHostException：无法解析主机（策略问题）
解决方案2
0 2012-07-30 19:14:30
You will need to give your asynctask a timeout handler, since you are connected but not downloading anything. 您将需要为asynctask提供一个超时处理程序，因为您已连接但未下载任何内容。 Put a timeout for around 3000 - 5000ms 设置大约3000-5000ms的超时时间
How to create a timeout handler: 如何创建超时处理程序：
Android - Setting a Timeout for an AsyncTask? Android-为AsyncTask设置超时？
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