public class ODKortrijkWebservice extends AsyncTask < ODKortrijkInterface, Void, String > {
private ODKortrijkInterface listener;@
Override
protected String doInBackground(ODKortrijkInterface...arg0) {
listener = arg0[0];
InputStream is = null;
int len = 10000;
StringBuilder winkelBuilder = new StringBuilder();
// execute search
try {
URL url = new URL("http://data.kortrijk.be/middenstand/winkels_markten");
try {
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setReadTimeout(10000 /* milliseconds */ );
urlConnection.setConnectTimeout(15000 /* milliseconds */ );
urlConnection.setRequestMethod("GET");
urlConnection.setDoInput(true);
urlConnection.connect();
int response = urlConnection.getResponseCode();
Log.d("Inputstream", "The response is: " + response);
is = urlConnection.getInputStream();
// Todo: add every line to my winkelBuilder??
} finally {
if (is != null) {
is.close();
}
}
} catch (Exception e) {
e.printStackTrace();
}
return winkelBuilder.toString();
}
protected void onPostExecute(String result) {
ArrayList < Winkel > winkels = processResult(result);
listener.updateScreen(winkels);
}
private ArrayList < Winkel > processResult(String result) {
ArrayList < Winkel > winkels = new ArrayList < Winkel > ();
Winkel winkel = new Winkel();
try {
// parse XML
XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
factory.setNamespaceAware(true);
XmlPullParser xpp = factory.newPullParser();
xpp.setInput(new StringReader(result));
int eventType = xpp.getEventType();
boolean isItem = false;
while (eventType != XmlPullParser.END_DOCUMENT) {
if (eventType == XmlPullParser.START_TAG) {
if (xpp.getName().equalsIgnoreCase("company")) {
winkel = new Winkel();
isItem = true;
} else if (xpp.getName().equalsIgnoreCase("bedrijfsnaam") && isItem) {
xpp.next();
winkel.setNaam(xpp.getText());
} else if (xpp.getName().equalsIgnoreCase("postcde") && isItem) {
xpp.next();
winkel.setPostcode(xpp.getText());
} else if (xpp.getName().equalsIgnoreCase("deelgemeente") && isItem) {
xpp.next();
winkel.setGemeente(xpp.getText());
} else if (xpp.getName().equalsIgnoreCase("gemeente") && isItem) {
xpp.next();
winkel.setDeelGemeente(xpp.getText());
} else if (xpp.getName().equalsIgnoreCase("adres") && isItem) {
winkel.setAdres(xpp.getText());
winkels.add(winkel);
isItem = false;
}
}
eventType = xpp.next();
}
} catch (Exception e) {
e.printStackTrace();
}
return winkels;
}
}
我的解析器位于底部，我需要从webservice获取数据并读取每一行，放入我的stringbuilder中，以便解析器可以读取和解析它。我认为（???）我正确地连接到数据库，但是如何使数据变得可读？谢谢
编辑：尝试运行时，我收到此错误：
07-27 13:31:57.993 17259-17288/com.example.hoofdgebruiker.winkelskortrijk E/AndroidRuntime: FATAL EXCEPTION: AsyncTask #1
Process: com.example.hoofdgebruiker.winkelskortrijk, PID: 17259
java.lang.RuntimeException: An error occured while executing doInBackground()
at android.os.AsyncTask$3.done(AsyncTask.java:304)
at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
at java.util.concurrent.FutureTask.setException(FutureTask.java:222)
at java.util.concurrent.FutureTask.run(FutureTask.java:242)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:818)
Caused by: java.lang.ArrayIndexOutOfBoundsException: length=0; index=0
at com.example.hoofdgebruiker.winkelskortrijk.Utill.ODKortrijkWebservice.doInBackground(ODKortrijkWebservice.java:28)
at com.example.hoofdgebruiker.winkelskortrijk.Utill.ODKortrijkWebservice.doInBackground(ODKortrijkWebservice.java:24)
at android.os.AsyncTask$2.call(AsyncTask.java:292)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:818)
答案 0 :(得分：0)
您可以使用：
BufferedReader reader = new BufferedReader(new InputStreamReader(is, Charset.forName("UTF-8")));
String parseThis = reader.readLine();
那会给你一串输出。如果是JSON，请添加：
JSONObject jsonObj = new JSONObject(parseThis);
JSONArray arrayOfStuff = jsonObj.getJSONArray(array_tag);