JavaNullPointer 异常填充数组

Question

我正在执行这段代码：

 HttpTransportSE transportSE = new HttpTransportSE(URL);
            try{
                //Web service call
                transportSE.call(SOAP_ACTION_BRING_NEEDS, envelope);

                //create SoapPrimitive and obtain response
                resultsRequestSOAP = (SoapObject)envelope.getResponse();

                int intPropertyCount = resultsRequestSOAP.getPropertyCount();
                strNeeds = new String[intPropertyCount];

                for(int i= 0;i< intPropertyCount; i++)
                {
                    //strNeeds[i]= resultsRequestSOAP.getPropertyAsString(i).toString();
                    //Format the information from the web service
                    Object property = resultsRequestSOAP.getProperty(i);
                    if (property instanceof SoapObject) {
                        SoapObject needsList = (SoapObject) property;
                        strNeeds[i] = needsList.getProperty("Descripcion").toString();
                        strCodeNeeds[i] = needsList.getProperty("Codigo").toString();
                    }
                }
            }catch (Exception e){
                exc = true;
                e.printStackTrace();
            }

及其在这行代码上的制动：

 strCodeNeeds[i] = needsList.getProperty("Codigo").toString();

异常错误java.lang.NullPointerException 和suppressedExceptions = {java.util.Collections$EmptyList@830033977576} = 0。

我将手表放在迭代“For”的“needList”上，它在position 0 = anyType{Codigo=3; CodigoClase=1; Descripcion=Acceso a puerto; }中包含此结果

并且数组strNeeds[i] 填充正确。

知道发生了什么吗？感谢您的建议。

Answer 1

这会导致教程错误！他们忘记初始化 strCodeNeeds，

strCodeNeeds = new String[intPropertyCount];