java.lang.ClassCastException:java.util.Vector无法转换为org.ksoap2.serialization.SoapPrimitive [英] java.lang.ClassCastException: java.util.Vector cannot be cast to org.ksoap2.serialization.SoapPrimitive

问题描述

我正在尝试将我的Android APP开发连接到Web服务，但似乎无法捕获响应(引发上面的错误)；我的APP代码的片段如下:

I am trying to connect my Android APP development to a Web Service and cannot seem to capture the response (throws the above error); the snippet of my APP code, follows:

@Override
protected String doInBackground(String... params) {

    String URL = "https://MyDomain/Services/AccountManager.asmx";
    String NAMESPACE = "http://tempuri.org/";
    String METHOD_NAME = parameters.get("METHOD_NAME");
    String ReturnValue;

    SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);

    // addProperty for each KeyPair in the Parameters HashMap
    for (Map.Entry<String, String> parameter : parameters.entrySet()) {
        if (!parameter.getKey().startsWith("_") && parameter.getKey() != "METHOD_NAME") {
        request.addProperty(parameter.getKey() , parameter.getValue());
        }
    }

    SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
    envelope.dotNet = true;
    envelope.implicitTypes = true;
    envelope.setOutputSoapObject(request);

    HttpTransportSE httpTransportSE = new HttpTransportSE(URL);

    try {
        httpTransportSE.call(NAMESPACE + METHOD_NAME, envelope);
        SoapPrimitive soapPrimitive = (SoapPrimitive) envelope.getResponse();
        ReturnValue = soapPrimitive.getAttribute("StatusCode").toString();
    } catch (Exception ex) {
        ReturnValue = "Error: " + ex.getMessage();
    }
    return ReturnValue;
}

该错误由行引发

SoapPrimitive soapPrimitive = (SoapPrimitive) envelope.getResponse();

我阅读了许多文章/帖子，建议将上一行更改为下一行:

I read a number of articles/posts which suggests changing the previous line, to the following line:

Object soapPrimitive = (Object) envelope.getResponse();

尽管这样做可以解决"错误，但是服务的返回值却未命名:

Whilst this does "workaround" the error, the return values from the service are then unnamed:

1. 确定
2. 2119100
3. 278
4. E

...而不是处于可用的配对"状态； <​​/p>

... rather than, being in a usable "pairing";

response.getAttribute("AccountNumber") = 2119100
response.getAttribute("AccountBalance") = 278
response.getAttribute("StatusCode") = "E"

我确实可以控制Web服务，因此如果可以的话，可以在那里进行编辑.服务的C#代码段:

I do have control of the Web Service, so it's possible to make edits there, if that's the solution; a snippet of the C# code for the service:

[WebMethod(
    Description = "Account Lookup", 
    MessageName = "Account",
    EnableSession = false)]
public string Account(
    string PostCode, 
    string Surname, 
    out double? AccountBalance, 
    out string AccountNumber, 
    out string StatusCode)
    {
        // MY STUFF HERE
        AccountBalance = 50;
        AccountNumber = 123456;
        StatusCode = "A";
        Return "OK";
    }

以上是实际服务的大幅缩减版本，(用于生产)该服务将返回[例如]金融交易的完整明细，包括期初余额，当期余额，增值税，利息，折扣，等，因此跟踪未命名的索引列表将逐渐成为维护的噩梦.

The above is a significantly cut-down version of the actual service, which (for production) would return [for example] a complete breakdown of a financial transaction, with the opening balance, current balance, VAT, interest, discounts, etc., so keeping track of an unnamed indexed list will gradually become a maintenance nightmare.

我已经更改(并简化了)WebService，使其仅使用INPUT值

I have changed (and simplified)the WebService so that it ONLY takes the INPUT values

[WebMethod(
    Description = "Account Lookup", 
    MessageName = "Account",
    EnableSession = false)]
public string Account(
    string PostCode, 
    string Surname)

..并从该方法中更深入地调用处理输出"参数的私有方法.然后，WebMethod将这些参数转换为JSON字符串并返回.这个方法(相当丑陋的方法)奏效了，直到我想返回一个数据数组，然后直接回到原始错误.

.. and from within that method, I make the more in-depth call to a private method that handled the "out" parameters. The WebMethod then turns those parameters into a JSON string and return it. This (rather ugly method) worked, until I wanted to return an array of data, which dropped straight back to the original error.

...下一步(由于无法找到有效的解决方案)将尝试与XML响应相同.

... next step (as I cannot locate a working solution) will be to try the same with and XML response.

推荐答案

可能是envelope.getResponse()调用返回了SoapPrimitive s的集合.

It could be that envelope.getResponse() call returns a collection of SoapPrimitives.

尝试类似

Vector responseVector = (Vector) envelope.getResponse();
for (Vector res : responseVector) {
    SoapPrimitive soapPrimitive = (SoapPrimitive) res;
    // your code here using soapPrimitives
}

如果元素的类型仍然不同于SoapPrimitive，则将出现一个新的Exception，您可以进行相应的投射.

If the type of elements is still different than SoapPrimitive, there will be a new Exception and you can cast accordingly.

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