我在运行RssReader的Android项目时出错。
代码：
URL url = new URL(urlToRssFeed);
SAXParserFactory factory = SAXParserFactory.newInstance();
SAXParser parser = factory.newSAXParser();
XMLReader xmlreader = parser.getXMLReader();
RssHandler theRSSHandler = new RssHandler();
xmlreader.setContentHandler(theRSSHandler);
InputSource is = new InputSource(url.openStream());
xmlreader.parse(is);
return theRSSHandler.getFeed();
它显示以下错误：
android.os.NetworkOnMainThreadException
如何解决此问题？
当前回答
尽管上面有一个巨大的解决方案池，但没有人提到com.koushikduta.ion：https://github.com/koush/ion
它也是异步的，使用起来非常简单：
Ion.with(context)
.load("http://example.com/thing.json")
.asJsonObject()
.setCallback(new FutureCallback<JsonObject>() {
@Override
public void onCompleted(Exception e, JsonObject result) {
// do stuff with the result or error
}
});
其他回答
我使用新线程解决了这个问题。
Thread thread = new Thread(new Runnable() {
@Override
public void run() {
try {
//Your code goes here
} catch (Exception e) {
e.printStackTrace();
}
}
});
thread.start();
您也可以使用以下代码使用严格模式来解决此问题。这也是解决这个问题的一个替代方案。
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
但最好的做法是使用AsyncTask。
在活动中使用此项
btnsub.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
new Thread(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
//Initialize soap request + add parameters
SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME1);
//Use this to add parameters
request.addProperty("pincode", txtpincode.getText().toString());
request.addProperty("bg", bloodgroup.getSelectedItem().toString());
//Declare the version of the SOAP request
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
envelope.setOutputSoapObject(request);
envelope.dotNet = true;
try {
HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
//this is the actual part that will call the webservice
androidHttpTransport.call(SOAP_ACTION1, envelope);
// Get the SoapResult from the envelope body.
SoapObject result = (SoapObject) envelope.getResponse();
Log.e("result data", "data" + result);
SoapObject root = (SoapObject) result.getProperty(0);
// SoapObject s_deals = (SoapObject) root.getProperty(0);
// SoapObject s_deals_1 = (SoapObject) s_deals.getProperty(0);
//
System.out.println("********Count : " + root.getPropertyCount());
value = new ArrayList<Detailinfo>();
for (int i = 0; i < root.getPropertyCount(); i++) {
SoapObject s_deals = (SoapObject) root.getProperty(i);
Detailinfo info = new Detailinfo();
info.setFirstName(s_deals.getProperty("Firstname").toString());
info.setLastName(s_deals.getProperty("Lastname").toString());
info.setDOB(s_deals.getProperty("DOB").toString());
info.setGender(s_deals.getProperty("Gender").toString());
info.setAddress(s_deals.getProperty("Address").toString());
info.setCity(s_deals.getProperty("City").toString());
info.setState(s_deals.getProperty("State").toString());
info.setPinecode(s_deals.getProperty("Pinecode").toString());
info.setMobile(s_deals.getProperty("Mobile").toString());
info.setEmail(s_deals.getProperty("Email").toString());
info.setBloodgroup(s_deals.getProperty("Bloodgroup").toString());
info.setAdddate(s_deals.getProperty("Adddate").toString());
info.setWaight(s_deals.getProperty("waight").toString());
value.add(info);
}
} catch (Exception e) {
e.printStackTrace();
}
Intent intent = new Intent(getApplicationContext(), ComposeMail.class);
//intent.putParcelableArrayListExtra("valuesList", value);
startActivity(intent);
}
}).start();
}
});
spektom的顶级答案非常完美。
如果您正在内联编写AsyncTask，而不是作为类扩展，并且在此基础上，如果需要从AsyncTask中获取响应，可以使用如下的get（）方法。
RSSFeed feed = new RetreiveFeedTask().execute(urlToRssFeed).get();
（从他的例子中。）
实际上，您可以启动一个新线程。我以前有过这个问题，并用这种方法解决了它。
