Question

我尝试使用KSoap2从WebService获取一些数据。

WebService响应一个非常大的XML文件，所以当我在做HttpTransportSE.call（）时，我得到一个ouOfMemory异常。

是否有可能从Soap Webservice获取剪切响应？或者有没有办法直接将其写入设备上的文件？这是获取数据的类：

    public static SoapObject GetItemData()
{

    SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME_ITEM_DATA);
    request.addProperty("Company", company);
    request.addProperty("SerialNumber", serialId);

    itemEnvelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
    itemEnvelope.dotNet = true;

    itemEnvelope.setOutputSoapObject(request);

    AndroidHttpTransportSE androidHttpTransport = new AndroidHttpTransportSE(URL);
    androidHttpTransport.debug = true;
    Log.d("==ITEM_URL==", URL);
    try
    {
       androidHttpTransport.call(SOAP_ACTION_ITEM_DATA, itemEnvelope);
       Log.d("==ItemVerbindung==", "Verbindung aufgebaut");
    }
    catch (Exception e)
    {
       e.printStackTrace();
       Log.d("==ItemVerbindung==", "HTTPCALL nicht ausgeführt");
    }

    try
    {
        itemResult = (SoapObject)itemEnvelope.getResponse();
        Log.d("==ItemResponse==", "PropertyCount: "+itemResult.getPropertyCount());
    }
    catch(ClassCastException e)
    {
        itemResult = (SoapObject)itemEnvelope.bodyIn;           
    } 
    catch (SoapFault e)
    {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    if(itemResult != null)
    {
        return itemResult;
    }   
    return null;
}

我还修改了HttpTransportSE.java并将其操作直接写入文件。但是我得到了一个无效的令牌错误。

Answer 1

我记得以前见过这个问题：

两项建议：

1）在下载时将SOAP XML流直接保存到磁盘。不要将其存储在内存中。

2）使用 SAX风格的解析器解析它，你不会在内存中加载整个DOM，而是以块的形式解析它。

编辑：检查 - ＆gt; Very large SOAP response - Android- out of memory error

Answer 2

我找到了一个不使用KSoap2库的解决方案。

以下是代码：

try {

    java.net.URL url = new java.net.URL(URL);
    HttpURLConnection rc = (HttpURLConnection) url.openConnection();
    rc.setRequestMethod("POST");

    rc.setDoOutput(true);
    rc.setDoInput(true);

    rc.setRequestProperty("Content-Type", "text/xml; charset=utf-8");
    rc.addRequestProperty("User-Agent", HTTP.USER_AGENT);
    rc.setRequestProperty("SOAPAction", SOAP_ACTION_ITEM_DATA);
    OutputStream out = rc.getOutputStream();
    Writer wout;
    wout = new OutputStreamWriter(out);
    wout.write("<?xml version=\"1.0\" encoding=\"utf-8\"?>");
    wout.write("<soap:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\">");
    wout.write("<soap:Body>");
    wout.write("<GetItemData2 xmlns=\"http://localhost/HSWebBL\">");
    wout.write("<Company>" + company + "</Company>");
    wout.write("<SerialNumber>" + serialId + "</SerialNumber>");
    wout.write("</GetItemData2>");
    wout.write("</soap:Body>");
    wout.write("</soap:Envelope>");
    wout.flush();
    wout.close();
    rc.connect();

    Log.d("==CLIENT==", "responsecode: " + rc.getResponseCode() + " " + rc.getResponseMessage());
    InputStream in = new BufferedInputStream(rc.getInputStream(), BUFFER_SIZE);
} catch (ProtocolException e) {
    e.printStackTrace();
} catch (MalformedURLException e) {
    e.printStackTrace();
} catch (IOException e) {
    e.printStackTrace();
}

我使用SAXParser来解析InputStream。这样我就不会得到outOfMemoryException并且不再出现解析错误。

在做Android调用时出现KSoap2 outOfMemoryError

2 个答案: