Android :: Unserializing Objects Via The Hessian Web Protocol Leads To ClassNotFoundException
Aug 24, 2010
I am using the Hessian web protocol[1] or rather more the Android port Hessdroid[2] to fetch and unserialize objects from a web server. It works quite well but unfortunately I get this message:
CODE:......
When actually unserializing an object. The code within the library that throws the warning is:
CODE:.......
I guess the problem is that the class NewsSetCategory resides in a package and so cannot be loaded without the whole package name by the ClassLoader but this is a bling guess.
Is there a way to adapt the class path or to easily create a new PathClassLoader that will load classes directly from the package? Or does anybody else have any experience with Hessian on Android?
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Oct 26, 2010
The FAQ mentions a method of passing objects around activities. (It is not clear to me): "A HashMap of WeakReferences to Objects. You can also use a HashMap of WeakReferences to Objects with Long keys. When an activity wants to pass an object to another activity, it simply puts the object in the map and sends the key (which is a unique Long based on a counter or time stamp) to the recipient activity via intent extras. The recipient activity retrieves the object using this key.".................
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Jun 15, 2010
I have an application that have a Google map on Google Android 1.5 since we have been working on the application for a long time, we are not in stage of upgrading to the newest framework, so we are using 1.5. Now, I have map locations that are dynamically generated and drawn on the map at run-time to visualize some streams, Up to this point the application is working fine, Now my problem is that I am trying to filter the objects ( addresses) to visualize only the on-screen ones. I do NOT want to visualize the addresses that are off-screen. The way I am trying to do this is to check the screen-coordinates of each object (address) before visualizing it, then it the coordinates (x,y) more than (0,0) and less than (320, 460). I should visualize it. I am trying to use this approach, but it is not working for some reasons, I have tried many posts but could not understand why, there must be something missing somewhere that I am not aware of.
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Jan 11, 2010
A component I have created works fine if I put it in the main project and reference it from any res/layout xml, but when I put it in a project on which the main project depends, I get a ClassNotFoundException in the xml.
Whilst after compiling the interface works fine, it is a pain in the * to design an interface without seeing what I am doing because of the error. Does anyone know how to solve it?
Stacktrace:
CODE:.........................
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Feb 21, 2010
I use a custom Parcelable to carry some data to a BroadcastReceiver. Here is what i do:
I register my intent and set the extra Parcelable on it along with an extra classloader (intent.setExtraClassLoader(..)). Next i schedule the execution of the broadcast via an AlarmManager.
So when the AlarmManager fires it looks at my intent with its parcel which it can not process since it doesn't use the supplied classloader (as it seams).
I think the classloader gets lost when Inten.fillIn copys the intent to a new one (see stack trace).
CODE:.......................
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Jun 11, 2009
I have a problem and cant realize a reason. I have ClassNotFoundException when starting Intent i = new Intent(EventInfo.this, AndricoMap.class); i.putExtra("address", address); startActivity(i);
There are log and class below
CODE:.....................
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May 7, 2010
I'm writing an app that has a foreground service, content provider, and a Activity front end that binds to the service and gets back a List of objects using AIDL. The service does work and updates a database.
If I leave the activity open for 4-8+ hours, and go to the "Running Services" section under settings on the phone (Nexus One) an unusually large amount of memory being used is shown (~42MB).
I figure there is a leak. When I check the heap memory i get Heap size:~18MB, ~2MB allocated, ~16MB free. Analyzing the hprof in Eclipse MAT seems fine, which leads me to theorize that memory is leaking on the stack. Is this even possible? If it is, what can I do to stop or investigate the leak? Is the reported memory usage on the "Running Services" section of android even correct (I assume it is)?
Another note: I have been unable to reproduce this issue when the UI is not up (with only the service running)
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Sep 23, 2010
I have created and published my first android app. It's very simple. It works fine on simulator and some phones, but I am getting this error:
CODE:.......................
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Jun 22, 2010
So I ran into a problem today while working on my Android program. I have a class that turns that an XML string into a Java object (third party) and it works fine in as a regular java project but on Android I get this weird error:
CODE:.......
I hide my application name and my package for obvious reasons but I was wondering if anyone has ever encountered problems like this. Class is in the correct package, which is a library I have added. Other classes that I reference before are there and those can be made. Are there any other reasons a ClassNotFound Exception is thrown?
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Sep 19, 2010
Every time I flash a different Kernel my Evo goes into a boot loop. I am using RA-Recovery, and wiping Data/cahe and dalvik before flashing. I flashed a new ROM and was able to install Kernel one time, any more than that and the Boot loop starts, even if i flash the first kernel that did work it still loops on me. I was on Clockwork and changed over to RA, that did not help, tried both BFS and CFS and no change. Tried Kingx 8 and 9, netarchys 4.18 and 4.19. I flashed 3.28.651.1 then netarchy's 4.1.9 and it started the BL, then reflashed 3.28 and tried kingx 9 and it worked, I'm beginning to wonder if there is something with netarchy's kernels that my Evo doesnt care for? I should add that this time when wiping i only wiped cache and dalvik and left the data alone. I suppose the only real way to find the culprit is to test out all the variables.
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Sep 27, 2010
Sometimes when I launch the "Messaging" application, it randomly opens a random app that I have been currently using.
Sometimes it works and just shows all of my messages. This is quite annoying and this has happened to me even after several factory resets.
Am I the only one with this issue? I have searched the forum but couldn't find a related thread.
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Mar 22, 2010
Well I was trying to get sprint to understand my frustration over a lack of MMS messaging for my Hero, and the call got disconnected. While I spoke with another rep, I got a voice mail. With some info I desperatly hope is true.
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Nov 3, 2010
Im going to develop one android application which transfer music file, contact exchange, voice chat, text chat etc.through WiFi. Which protocol will suit my application UDP or TCP. Because both protocol having some merits and demerits. Can u give me some suggestion, it will helpful for me.
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Oct 12, 2010
How can i implement SIP protocol in android.I want to make video conferencing application using SIP protocol.So is it feasible using SIP protocol and how to start.
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Apr 27, 2010
Do you know any way on how to play a stream using mmsh protocol? It seems android at default cannot play mmsh streams. Any idea or inputs on how to start?-- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscribe @googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
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Nov 11, 2009
i want to do the following thing - when a user navigates to a web page, I want to have a link in there that looks like this: <p><a href="myprotocol://blah=42">Click here for fun.</a></p> Then when the user clicks on that from the phone browser, I want it to launch my intent with that full url. In my AndroidManifest.xml file, I have the following info: <activity android:name="com.test.MyActivity" style="@style/ MyStyle"> <!-- custom protocol association --><intent-filter><action android:name="android.intent.action.VIEW"></action> <category android:name="android.intent.category.DEFAULT"></category><category android:name="android.intent. category. BROWSABLE"> </category><data android:scheme="myprotocol"/></intent-filter></activity>When I try this, when I click on the link on the web page from the phone browser, it says -- Web page not available The Web page at myprotocol://blah=42 might be temporarily down or it may have moved permanently to a new web address.
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Jul 21, 2009
When using Protocol Buffers with Android (running in the Windows VM) I'm noticing that the first time I instantiate a protocol buffer based class Android lags for some time. When I step through it looks like it's spending a lot of time dynamically loading the protocol buffer classes. Is there something I can do to speed up this process? I haven't tested yet on a physical device, so the delay might not be as bad but in the VM it takes about 30 - 45 seconds to load all the classes and get past that first message instantiation. What I did was downloaded the Protocol Buffers source code. Compiled the.java files. Stuffed them into a .jar. Added the .jar as an external library to my Eclipse project. Generated the .java classes from the .proto files. Added the generated .java files to my project. Ran my project. I'm not sure if I'm doing something wrong it terms of how to reference external libraries with an Android project, but 30-45 seconds seems like a very long time to wait on a 2.6GHz machine. Also, I recently learned that android uses Protocol Buffers internally. Will this cause any sort of conflicts with my included .jar that could be the problem? I *think* the namespace is different but I'm not entirely sure. Lastly. Why did Google use Protocol Buffers internally and not make it available to SDK developers. This makes me very sad knowing that it's all right there and I can't use it.
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Jul 20, 2010
For some reason, my Desire won't access any internet pages this morning. When I select any of my favourites it tries hard, but then flicks to a page that says:ERROR The requested URL could not be retrieved.The following error was encountered while trying to retrieve the URL: www.bbc.co.uk ICAP Protocol error The system returned: [No error]This means that some aspect of the ICAP communication failed.Some possible problems are:The ICAP server is not reachable.An illegal response was received from the ICAP server.I've cleared the cache, cookies and history. I'm with Orange if that helps! I've checked a number of sites. I've tried going via favourites and typing URL directly into the address bar. I use the standard Android browser.
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Mar 27, 2010
Using the Android SDK, is it possible to play a video stream using the MMS protocol I am streaming video from a PC using windows media. I can use Windows Media Player to play the stream by just inputting the following URL in Windows Media Player mms://192.168.223.194:8081. Is it possible to play the same stream using the Android SDK?
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Apr 7, 2010
We are designing an internal system that will have a .NET PC base station and many Android mobiles, communicating over WiFi. Can't decide between SOAP or XML-RPC protocol. Primary concerns are maturity, compatibility, and the minimizing of coding/integration, in that order. Which is best?
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Nov 1, 2011
which protocol Google Talk on Android uses? I know that for the Talk application on Gmail uses the Jabber/XMPP protocol. I need to know what protocol (or if it's the same protocol) that's the protocol being used on port 5228.
The reason being, my organization will open the port to the Android sync and push services but only for that specific protocol (for security purposes obviously).
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Feb 11, 2010
I would like to explain me better. In android once you receive an email on gmail you would get notified almost in realtime. How does it work? Thinking about an answer i had 1 idea: Android is connected to a gmail server which does not send anything untill it has new mails This solution , which is the only one i can think about, is a little bit expensive, in term of battery consumption. Do you have further ideas? If not do you know some opensource server that will accomplish my idea?
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Sep 21, 2010
Does Android Support OpenYmsg Api?
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Oct 12, 2010
are there any docs covering the filtering of the protocol specifier? Something like the market application does with "market://", i'd like to make with my application.
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Jan 21, 2010
I need to insert,update,delete events in google calendar using android. I tried using the protocol given at http://code.google.com /apis/calendar/data/2.0/developers_guide_protoc but I was unable to go beyond authenticating the user. I was able to authenticate the user and I extracted the Auth code using:- temp1 = EntityUtils.toString (response. getEntity ()); if(response.getStatusLine().getStatusCode()==200) auth = temp1. substring (temp1. indexOf ("Auth=")+5).trim (); After this I tried inserting an event which did not work. I was getting status code 200 in response and I am not sure even if I did get a proper response, how can I extract the cookie s and gsessionid for my next request. I tried creating a calendar instead and I received the same status code 200. I used the following code:- String messageBody="<entry xmlns= 'http://www. w3.org /2005/Atom'"+ " xmlns: gd='http:// schemas. google.com /g/2005'"+ " xmlns:gCal=' http://schemas.google.com /gCal/2005'>"+" <title type='text'>ABC Project Schedule</title>"+ " <summary type='text'>This calendar Type as otherwise I would get a ClientProtocol Exception (content- length was causing the exception, didn't put content-type since it is already mentioned in the entity not sure where it should be defined). I am sorry that I don't understand the basics correctly.
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Feb 11, 2009
How does Android provide support for traditional TCP or UDP sockets? Is there a wireless IP protocol using just the cell phone? If so, how does this work? Or, do I need an 802.11 chipset in the handset (assuming this isn't standard)?
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Dec 21, 2009
I was wondering if there is an app that allows you to name your phone. For example lets say i named my Droid. Optimus Prime And then i could use voice protocol after saying my phone's name For example Optimus Prime please text autobots (contact group), "Autobots Transform and roll out!" After saying its name the phone would automatically know that Autobots is a contact group and that the message i want texted is "Autobots Assemble!" Is there an app like this already? If there isn't it would be a great idea for one.
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Nov 6, 2010
I am hoping to create my own protocol handler for urls in a webview. I have tried two approaches already. The first was to attempt something similar to the approach defined here to create a customer protocol handler. http://java.sun.com/developer /onlineTraining/ protocol handlers / This works in a command-line Java program if I correctly set the system property java.protocol.handler.pkgs, but it does not work in Android, probably because I cannot figure out where to define this system property. Defining the system property in the code does not work. I assume this is because it needs to be loaded when the application first starts. I have also attempted to use URL.setURLStreamHandlerFactory. This works for creating URL objects within the code, but it does not seem to be associated with the WebView. Any ideas on how to get this working?
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Jul 8, 2010
i have a camera Activity after which i take a picture and saving it to gallery and uploading to the server My upload code is not working, i need help on this? // image capture
Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
startActivityForResult(intent, 0);
//image Saving
if (requestCode == 0 && resultCode == RESULT_OK)
{ Bundle extras = data.getExtras();
Bitmap b = (Bitmap) extras.get("data");
ImageView mImg;
mImg = (ImageView) findViewById(R.id.head);
mImg.setImageBitmap(b);
// save image to gallery
Shot = "HeadShot"; //Long.toString(System.currentTimeMillis());
MediaStore.Images.Media.insertImage(getContentResolver(), b, Shot, NAME);
//Upload to the server public void Upload(String url, HttpEntity imgdata) throws Exception, Exception {
DefaultHttpClient client = new DefaultHttpClient();
HttpPost post = new HttpPost(url);
post.setHeader("Content-Type", "bitmap; charset=utf-8");
post.setURI(new URI(url));
post.setEntity(imgdata);
HttpUriRequest request = post;
HttpResponse response = client.execute(request);
HttpEntity entity = response.getEntity();
return entity.getContent();
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Jul 15, 2010
I'm trying to implement some basic functionality for Google Spreadsheets,using the protocol specification with requests.The reason i'm doing this because it is for Android, and gdata-java library doesn't really work and the alpha android one doesn't really cut it.I managed to implement authentication, and get for lists, and delete, but for editing updating a row i can't really wrap my mind around it.For example i want to change the contents of a cell here is the specification for the protocol From my understanding of it, i have to send some sort of atom or xml formatted request to the edit URL. I never sent such type of requests. I also found this, which gives a clue on how it should be done (also an unanswered question on a forum), but didn't really managed it.Here is my authentication function if you need it, so you don't implement it again, if you want to try and code it.
/*** Logs in to the Google service using the ClientLogin HttpRequest API and returns an authentication token */ private String getAuthToken() {HttpClient httpclient = new DefaultHttpClient();HttpPost httppost = new HttpPost(CLIENT_LOGIN_ADDRESS);
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("accountType", "GOOGLE"));
nameValuePairs.add(new BasicNameValuePair("Email", "username@gmail.com"));
nameValuePairs.add(new BasicNameValuePair("Passwd", "password"));
nameValuePairs.add(new BasicNameValuePair("service", "wise"));
nameValuePairs.add(new BasicNameValuePair("source", SERVICE_NAME));
try {httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));This currently gives a 400 Bad request.Also I'm trying to achieve this using Apache HttpClient. Does anyone have any idea on how this might be achieved implemented how what request i should send?
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