I’m using KSoap to acess .net webservice from my android programme. When the webservice is either down or webservice url is wrong my application crashes.
Can someone tell me a way to handle this issue.
My code goes as below
public String logOut(String prefURL){
String Desc = "logging out";
String NAMESPACE="http://tempuri.org/";
String METHOD_NAME = "Logout";
String SOAP_ACTION = "http://tempuri.org/Logout";
String URL = prefURL+"/Authentication.asmx";
//creating soap object
SoapObject Request = new SoapObject(NAMESPACE, METHOD_NAME);
//adding properties to Request Soap Object
Request.addProperty("resourceID", ResourceID);
Request.addProperty("organisationID", OrganisatoinID);
Request.addProperty("description", Desc);
Request.addProperty("sessionID", SessionID);
Request.addProperty("imei", LoginActivity.deviceid);
Request.addProperty("longtitude", String.valueOf(LoginActivity.RDMSLon));
Request.addProperty("langtitude", String.valueOf(LoginActivity.RDMSLat));
Request.addProperty("deviceType", 4);
//creating soap envelop
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
envelope.dotNet=true;
envelope.setOutputSoapObject(Request);
//creating transport object
AndroidHttpTransport androidHttpTransport = new AndroidHttpTransport(URL);
try {
androidHttpTransport.call(SOAP_ACTION, envelope);
SoapPrimitive resultString = (SoapPrimitive)envelope.getResponse();
//jason array stored into a string
jstringarray = String.valueOf(resultString);
Log.v(TAG, "Logout" + jstringarray);
jArray = new JSONArray(String.valueOf(jstringarray));
JSONObject json_data = null;
json_data = jArray.getJSONObject(0);
Status = json_data.getString("Status");
Log.v(TAG, "Logout: "+ Status);
} catch (IOException e) {
e.printStackTrace();
} catch (XmlPullParserException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
}
return Status;
}
logcat extract
10-26 16:39:39.174: V/Login2(791): Inside preexecute
10-26 16:39:40.204: W/System.err(791): org.xmlpull.v1.XmlPullParserException: expected: START_TAG {http://schemas.xmlsoap.org/soap/envelope/}Envelope (position:START_TAG <HTML>@1:6 in java.io.InputStreamReader@44f1f8e8)
10-26 16:39:40.248: W/System.err(791): at org.kxml2.io.KXmlParser.exception(KXmlParser.java:273)
10-26 16:39:40.254: W/System.err(791): at org.kxml2.io.KXmlParser.require(KXmlParser.java:1431)
10-26 16:39:40.254: W/System.err(791): at org.ksoap2.SoapEnvelope.parse(SoapEnvelope.java:127)
10-26 16:39:40.254: W/System.err(791): at org.ksoap2.transport.Transport.parseResponse(Transport.java:63)
10-26 16:39:40.254: W/System.err(791): at org.ksoap2.transport.HttpTransportSE.call(HttpTransportSE.java:100)
10-26 16:39:40.254: W/System.err(791): at com.eyepax.rdms.service.ValidateUser.validate(ValidateUser.java:69)
10-26 16:39:40.254: W/System.err(791): at com.eyepax.rdms.LoginActivity$LoginTask.doInBackground(LoginActivity.java:434)
10-26 16:39:40.265: W/System.err(791): at com.eyepax.rdms.LoginActivity$LoginTask.doInBackground(LoginActivity.java:1)
10-26 16:39:40.265: W/System.err(791): at android.os.AsyncTask$2.call(AsyncTask.java:185)
10-26 16:39:40.265: W/System.err(791): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
10-26 16:39:40.265: W/System.err(791): at java.util.concurrent.FutureTask.run(FutureTask.java:137)
10-26 16:39:40.265: W/System.err(791): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1068)
10-26 16:39:40.265: W/System.err(791): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:561)
10-26 16:39:40.265: W/System.err(791): at java.lang.Thread.run(Thread.java:1096)
10-26 16:39:40.265: V/validate_user(791): Excepion
10-26 16:39:40.265: V/Login2(791): Inside doingback
10-26 16:39:40.265: V/Login2(791): Inside onPost
10-26 16:39:40.265: D/AndroidRuntime(791): Shutting down VM
10-26 16:39:40.265: W/dalvikvm(791): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
10-26 16:39:40.284: E/AndroidRuntime(791): FATAL EXCEPTION: main
10-26 16:39:40.284: E/AndroidRuntime(791): java.lang.NullPointerException
10-26 16:39:40.284: E/AndroidRuntime(791): at com.eyepax.rdms.LoginActivity$LoginTask.onPostExecute(LoginActivity.java:443)
10-26 16:39:40.284: E/AndroidRuntime(791): at com.eyepax.rdms.LoginActivity$LoginTask.onPostExecute(LoginActivity.java:1)
10-26 16:39:40.284: E/AndroidRuntime(791): at android.os.AsyncTask.finish(AsyncTask.java:417)
10-26 16:39:40.284: E/AndroidRuntime(791): at android.os.AsyncTask.access$300(AsyncTask.java:127)
10-26 16:39:40.284: E/AndroidRuntime(791): at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:429)
10-26 16:39:40.284: E/AndroidRuntime(791): at android.os.Handler.dispatchMessage(Handler.java:99)
10-26 16:39:40.284: E/AndroidRuntime(791): at android.os.Looper.loop(Looper.java:123)
10-26 16:39:40.284: E/AndroidRuntime(791): at android.app.ActivityThread.main(ActivityThread.java:4627)
10-26 16:39:40.284: E/AndroidRuntime(791): at java.lang.reflect.Method.invokeNative(Native Method)
10-26 16:39:40.284: E/AndroidRuntime(791): at java.lang.reflect.Method.invoke(Method.java:521)
10-26 16:39:40.284: E/AndroidRuntime(791): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
10-26 16:39:40.284: E/AndroidRuntime(791): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
10-26 16:39:40.284: E/AndroidRuntime(791): at dalvik.system.NativeStart.main(Native Method)
Thanks in advance.
Figured out the issue. When exception occured there are no message to be returned to main thread. I added a string value “failed” inside excepton block I added a value to the variable. so no more null pointer.