XML pullparser异常意外令牌

Question

我正在使用kso​​ap2库来调用Web服务方法。以下代码用于它

    SoapObject request = new SoapObject(SOAP_ACTION, SOAP_METHOD);
        for (Map.Entry<String, String> entry : params.entrySet()) {
            // Use this to add parameters
            request.addProperty(entry.getKey(), entry.getValue());
        }
        SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(
                SoapEnvelope.VER11);
        envelope.setOutputSoapObject(request);
        envelope.dotNet = false;

        HttpTransportSE androidHttpTransport = new HttpTransportSE(SOAP_URL);

        // this is the actual part that will call the webservice

        androidHttpTransport.call(SOAP_ACTION, envelope);

它给了我XML拉解析器异常“意外令牌（位置：TEXT”。但我使用相同的库来调用同一服务URL中的另一个方法而没有任何错误。 我的android os版本是4.0