HttpUtils Problem

[salmander]

hello All,

I have recently started working with HttpUtils, as I was working with manual HttpClient method earlier. Now after few testing I am encountering this error.

Starting Job: search
httputils_internalcheckifcanstart (java line: 131)
java.lang.NullPointerException
   at com.home.cafiq.test.httputils._internalcheckifcanstart(httputils.java:131)
   at com.home.cafiq.test.httputils._downloadlist(httputils.java:50)
   at com.home.cafiq.test.httputils._download(httputils.java:43)
   at com.home.cafiq.test.search._btnsearch_click(search.java:921)
   at java.lang.reflect.Method.invokeNative(Native Method)
   at java.lang.reflect.Method.invoke(Method.java:511)
   at anywheresoftware.b4a.BA.raiseEvent2(BA.java:170)
   at anywheresoftware.b4a.BA.raiseEvent2(BA.java:158)
   at anywheresoftware.b4a.BA.raiseEvent(BA.java:154)
   at anywheresoftware.b4a.objects.ViewWrapper$1.onClick(ViewWrapper.java:54)
   at android.view.View.performClick(View.java:3538)
   at android.view.View$PerformClick.run(View.java:14330)
   at android.os.Handler.handleCallback(Handler.java:607)
   at android.os.Handler.dispatchMessage(Handler.java:92)
   at android.os.Looper.loop(Looper.java:156)
   at android.app.ActivityThread.main(ActivityThread.java:5005)
   at java.lang.reflect.Method.invokeNative(Native Method)
   at java.lang.reflect.Method.invoke(Method.java:511)
   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
   at dalvik.system.NativeStart.main(Native Method)
java.lang.NullPointerException

any help much appreciated?

 

[salmander]

By playing around with the code more, I have found a clue. I have several activities and services which uses HttpClients to download data from the server in my project, and I have started converting HttpClient method to HttpUtils method. After successfully converting one Activity, when I tried using the httpUtils in service module, it was causing problems.

Can I not use httpUtils from a service module?
i have configured the service module like this.

'Service module
Sub Process_Globals
   'These global variables will be declared once when the application starts.
   'These variables can be accessed from all modules.
'   Dim httpClient1 As HttpClient
   Dim app_version, server_version As String
'   Dim url As String
   Dim preferences_set As Boolean
   
   HttpUtils.CallbackActivity = "RemoteManagement" ' Service Name
   HttpUtils.CallbackJobDoneSub = "JobDone"
   HttpUtils.CallbackUrlDoneSub = "URLdone"
   Dim MainUrl As String
End Sub


sub functionOne
'   httpClient1.InitializeAcceptAll("httpClient1")
'   Dim req As HttpRequest
'   req.InitializeGet(url & "update.txt")
'   httpClient1.Execute(req, 1)
   MainUrl = url & "update.txt"
   HttpUtils.Download("checkUpdate", MainUrl)
end sub
.
.
.
.
.
etc

But i think in one post it is mentioned that you can't run two jobs at one time. So this service runs in the background of the activity, could this be the problem? If yes, how can I re-solve it please?

And presumably it is ok to use the Service Name in "HttpUtils.CallbackActivity" method.
As mentioned in my earlier post I was using HttpClient Method to communicate with the servers. It was all working fine until I started using Android 4.0 layout. Every time my app tries to connect to the server, it was giving me the error message. Then I read in one post that you can't use Http communication on the main thread, Android 4.0 doesn't allow it and was suggested to use the HttpUtil code module.

Help me please.

 

[DeerBear]

Can I not use httpUtils from a service module?

Take this with a pinch of salt, I am no expert and I might be wrong.
However, the HTTPUtils code module uses a service to
actually do downloads and I think this could potentially be related to the
issues you're having.

Regards,

A

 

[salmander]

Thanks for your reply. I don't understand why there would be a problem calling a service module from a service module.

 

[Erel]

There is no problem with using HttpUtils from a service. However I plan to update HttpUtils and add support for multiple jobs. I recommend you to wait for this update.

 

[salmander]

Thanks a lot Erel. will be waiting. if you don't mind can I ask ETA please?

 

[Erel]

Hopefully today.

 

[pluton]

Update of HttpUtils is online

HttpUtils2 - Web services are now even simpler

Thank you Erel

 

[salmander]

cheers mate...haven't tried it yet. will test it first thing in the morning tomorrow.

 

[salmander]

just tried HttpUtil2. And it works like a charm.