androidHttpTransport.call(..，..)在使用ex.getMessage()打印时抛出null异

Question

我从使用eclipse开发的andriod应用程序调用webservice，但调用时出现异常androidHttpTransport.call（SOAP_ACTION，信封）；

例如，getMessage（）打印"null"异常消息

在manifist文件中，我指定了

 <uses-permission android:name="android.permission.INTERNET" />
   <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

以下是完整的代码

///////////////////
public class Yasir1Activity extends Activity {
    TextView tv;  

            private final String NAMESPACE = "http://www.webserviceX.NET/"; 
            private final String URL = "http://www.webservicex.net/ConvertWeight.asmx"; 
            private final String SOAP_ACTION = "http://www.webserviceX.NET/ConvertWeight"; 
            private final String METHOD_NAME = "ConvertWeight"; 
            /** Called when the activity is first created. */
            @Override
            public void onCreate(Bundle savedInstanceState) {  
                super.onCreate(savedInstanceState);  
                setContentView(R.layout.main);  
                tv=(TextView)findViewById(R.id.txt); 
            String msg="";
            SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME); 
            String weight = "3700"; 
            String fromUnit = "Grams"; 
            String toUnit = "Kilograms"; 
            PropertyInfo weightProp =new PropertyInfo(); 
            weightProp.setName("Weight"); 
            weightProp.setValue(weight); 
            weightProp.setType(double.class); 
            request.addProperty(weightProp); 
            PropertyInfo fromProp =new PropertyInfo(); 
            fromProp.setName("FromUnit"); 
            fromProp.setValue(fromUnit); 
            fromProp.setType(String.class); 
            request.addProperty(fromProp); 
            PropertyInfo toProp =new PropertyInfo(); 
            toProp.setName("ToUnit"); 
            toProp.setValue(toUnit); 
            toProp.setType(String.class); 
            request.addProperty(toProp); 
            SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11); 
            envelope.dotNet = true; 
            envelope.setOutputSoapObject(request); 
            HttpTransportSE androidHttpTransport = new HttpTransportSE(URL); 
            try 
            { 
                msg="before call";
                androidHttpTransport.call(SOAP_ACTION, envelope); //throwing exception
                msg+="call success";

                SoapPrimitive response = (SoapPrimitive)envelope.getResponse(); 
                //Log.i("myApp", response.toString()); 
                //TextView tv = new TextView(this); 
                msg+=response.toString();
                tv.setText(response.toString());//weight+" "+fromUnit+" equal "+response.toString()+ " "+toUnit); 
            } 
            catch(SocketException ex)
               {
                 msg+="Error on soapPrimitiveData() " + ex.getMessage();
                   ex.printStackTrace();
               }
            catch (Exception e) 
            { 
                e.printStackTrace(); 
                msg += "Exception " +e.getMessage(); //"Exception null" is printing
            }

            tv.setText( msg);
            } 
            }

Answer 1

我也遇到了同样的问题。我得到了一个null异常，因为我正在主线程中尝试。Honeycomb SDK或更高版本出现问题。http://developer.android.com/reference/android/os/NetworkOnMainThreadException.html

解决方案，在新线程中运行进程。

问候！

Answer 2

你应该在Android上看到这个带有ksoap2的Double吗？将Double属性添加到ksoap2中的soap请求中。