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KSOAP：当 Web 服务 url 错误时 Android 应用程序崩溃

发布于 2024-12-12 03:47:11 字数 5583 浏览 4 评论 0原文

我正在使用 KSoap 从我的 android 程序访问 .net web 服务。当 Web 服务关闭或 Web 服务 url 错误时，我的应用程序崩溃。

有人可以告诉我一种方法来处理这个问题。

我的代码如下

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)

提前致谢。

原文

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.

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评论（1）

云雾 2024-12-19 03:47:11

弄清楚了问题。当异常发生时，没有消息返回到主线程。我在异常块内添加了一个字符串值“失败”，我向变量添加了一个值。所以不再有空指针。

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.

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