Android :: Import Org.apache.commons.httpclient.HttpClient Library Error

Jul 2, 2009

I got one blog which interacts with servlets... Link as follows

In that program 2 libraries were used..

1---> import org.apache.commons.httpclient.HttpClient; 2---> import org.apache.commons.httpclient.methods.GetMethod;

When i check these libraries in my program, its show to resolve this error?

Android :: import org.apache.commons.httpclient.HttpClient library error

Android :: External Library Needs Org.apache.commons.httpclient Instead Of Org.apache.commons.http.client

Sep 28, 2010

I'm trying to use the Amazon Web Services java sdk jar but it has references to org.apache.commons.httpclient. All I seem to have in my Android sdk is org.apache.commons.http.client, which is a different namespace and obviously causes the build to fail. I'm new to Java and Android dev... is there a way to "map" one to the other or create some sort of symbolic link? If not, does that mean I have to import a "standard" org.apache.commons library?

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Android :: How To Enable Logging For Apache Commons HttpClient

Jul 14, 2010

To enable logging for apache commons HttpClient in normal Java application I used:


But on android I don't see logs in LogCat.

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Android :: Apache HttpClient 4.1?

Aug 26, 2010

Has anyone tried to use a newer version of Apache HttpClient on Android? There's an annoying bug in the HttpClient used by Android and I was wondering if I would run into problems trying to redistribute HttpClient 4.1 with my app.

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Android :: Apache HttpClient Digest Authentication?

Jun 2, 2010

Basically what I need to do is to perform digest authentication. First thing I tried is the official example available here.

But when I try to execute it(with some small changes, Post instead of the the Get method) I get a


When this failed I tried using:


At first I have only overridden "realm" and "nonce" DigestScheme parameters. But it turned out that PHP script running on the server requires all other params, but no matter if I specify them or not DigestScheme doesn't generate them in the Authorization RequestPreperty when I call its authenticate() method. And PHP script returns HTTP response code 200 with a message that PHP script requires cnonce, nc and qop parameters.

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Android :: Projects Classhpath - Org.apache.http.httpclient Package?

Aug 19, 2010

I am trying to import the code from this tutorial

Into my eclipse,the tutorial is oldand I have trouble importing the packages that it referes.

Are those packages deprecated? or I have to manually download and install them into my projects classhpath? if so can someone give me a link on where to find them?

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Android :: Implement A Java-written WebService To Consume With The Apache HttpClient?

Jun 18, 2010

I would like to create a Java-written RESTFul Web Service, possibly using an eclipse plugin.

This service should be consumed by an android application, using the apache HttpClient.

But my question is, which is the best/ideal technology (server side) to implement this kind of web service?

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Android :: Project Using Httpclient - Http.client - Apache - Post/get Method

May 17, 2009

I'm doing a Get and Post method for an android project and I need to "translate" HttpClient 3.x to HttpClient 4.x (using by android).

My problem is that I'm not sure of what I have done and I don't find the "translation" of some methods...

This is the HttpClient 3.x I have done and (-->) the HttpClient 4.x "translation" if I have found it (Only parties who ask me problems) :


I don't know if that is correct. This has caused problems because the packages are not named similarly, and some methods too. I just need documentation (I haven't found) and little help.

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Android :: BigFraction Class In The Apache-Commons-Math Library Return Incorrect Division Results?

May 14, 2010

In the spirit of using existing, tested and stable libraries of code, I started using the Apache-Commons-Math library and its BigFraction class to perform some rational calculations for an Android app I'm writing called RationalCalc.

It works great for every task that I have thrown at it, except for one nagging problem. When dividing certain BigFraction values, I am getting incorrect results.

If I create a BigFraction with the inverse of the divisor and multiply instead, I get the same incorrect answer but perhaps that is what the library is doing internally anyway.

Does anyone know what I am doing wrong?

The division works correctly with a BigFraction of 2.5 but not 2.51, 2.49, etc...


This was indeed a bug in the apache-commons-math 2.0 libraries. The bug is fixed in v.2.1.

It is now listed in the Fixed Issues section of the bug tracker:

When multiplying two BigFraction objects with numerators larger than will fit in an java-primitive int the result of BigFraction.ZERO is incorrectly returned..attempting to reproduce the issue and setting me on the right track.


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Android :: Apache HttpClient In Android Extremely Slow Downloading Attachment

Aug 1, 2010

I am trying to download a zip file using HttpCLient 4 and it is going at around .5 (kilobytes/kilobits)? per minute. The file is less than a MB large, and the download will probably take an hour! Am I doing something wrong? How else should I do this?

Here is my current implementation:


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Android :: Unzip -

Jan 24, 2010

Where do I unzip so that the import statement can find

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Android :: Localhost HttpClient Connection Refused Error?

Oct 8, 2009

I was just wondering if anyone solved this problem. Googling gives tons of posts having this question but not one with a proper reply. I tried literally every combination of the following two pieces of code with and without proxy:


I am trying to connect to a site on my intranet (its not localhost). I've tried the following:

Setting Proxy inside Eclipse settings. Setting my own localhost and writing a small php script that takes the url, connects to it and then gets the file from the intranet site - This works from the Browser though! It does not work when I use the IP address

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Android :: How To Use Apache Commons In Application

Aug 19, 2009

How to use apache.commons in my android application.

I put the right import, but when I compile it I get the following error:

: package does not exist import;

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Android :: Sending Email With Apache Commons

Sep 16, 2009

I am trying a simple send mail application using apache commons library.

Here is the code.

The email sending code is working fine in a standalone application.However when I try to run it as android application

It gave following error message. trouble processing "javax/naming/AuthenticationException.class": [2009-09-17 05:33:20 - Commons]

Attempt to include a core VM class in something other than a core library. It is likely that you have attempted to include the core library from a desktop virtual machine into an application, which will most assuredly not work. If you really intend to build a core library -- which is only appropriate as part of creating a full virtual machine binary, as opposed to compiling an application -- then use the "--core-library" option to suppress this error message. If you go ahead and use "--core-library" but are in fact building an application, then please be aware that your build will still fail at some point; you will simply be denied the pleasure of reading this helpful error message. [2009-09-17 05:33:20 - Commons] 1 error; aborting [2009-09-17 05:33:20 - Commons] Conversion to Dalvik format failed with error 1

I have added mail.jar,commons jars and jndi.jar to the references of eclipse If anybody know a resolution let me know.


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Android :: Crashing

Jan 27, 2010

I'm using to connect to a nntp server, however running a simple nntp.connect(host, port) crashes the android.

Anyone got any ideas? Do java packages work with android straight out of the box? or do they need editing?

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Android :: No Files Return From Apache Commons Net FTPClient

Dec 6, 2009

I am writing a ftp client on android sdk 1.5 with apache-commons-net- ftp-2.0. I can successfully connect to my testing ftp server but with I use listFiles() it return an empty FTPFile[].

I put the same code in a normal java program and it works fine. I don't know where is wrong. Any compatible problem when apache-commons- net-ftp-2.0 and android works together?

Here is my test code:


It is actually 4 files and 1 directory in the ftp root!

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Android :: Concise Example Of File Upload Via Java Lib Apache Commons

Sep 13, 2010

I've removed my convoluted and badly malformed question so that it doesn't detract from the very neat and correct answer beneath. Given the (surprising) difficulty of finding an on-line example for doing this incredibly common task, I hope Yoni gets a few more up-ticks for his response.

So the question...How do I use Apache.Commons to upload a file to some destination. I'm using it in Android and uploading to a PHP script, but obviously it can work from any Java program and to any HTTP based listener.

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Android :: Using HttpClient

Aug 24, 2010

I haven't used the Java HttpClient before and the documentation is confusing. Say I want to send a POST to the URL "https://domain/foo/ bar". I'm accessing a server with an XML API that defines the message to send like this:


And the response to expect like this:


Now, I can build and parse the portion inside the serverapi tags but I'm not sure how the HttpClient handles the header. If I use the standard code like this:


In the area shown as "not sure", should I pre-pend the entire header in front of the xml section, just as it's shown in the server API document or does the client take care of the first line, since it knows the URL?

Is there a way to see exactly what is about to be sent right before I call HttpClient.execute?

As for parsing the response, I believe I can just do this:


Or do I need to strip anything off the response content before I start parsing the xml? I took a few stabs at this and it looks like there's some HTTP bookkeeping information at the start of the response content.

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Android :: Best Httpclient Re-use Stategy

Jun 21, 2010

I'm writing a small application which needs httpclient lib, basically to manage the cookie/session automatically. The website I'm targeting needs a valid session, so, between each http call, I need to send the cookie. Httpclient does it well. This is a tv stream application and I have to fetch the channel url, the url has a token parameter and I have to be logged / authenticated / (=> have a valid cookie/sessionid) to fetch the channel url.

I got the first cookie/sessionid with the first connection to the website. The cookie is valid for a certain amount of time, there is no "expires" but I don't know if there is any server cron to cleanup the sessions. I assume I have to "ping" every x secondes to maintain the session valid.

Between each http call, the time could be from 1 sec to several minutes, it depends if the user wants to change the watched tv channel. The http call (to fetch the url) is not made by the UI Thread.

There are several possibilities to manage the httpclient : - a single httpclient static singleton instance accessed by a custom synchronized getClient() on an helper class => when / how to release the http connection ? How to handle that correctly if the user got a phone call / does not use the application for now (unvalidate during onResume, etc)? - Save the cookie (String serialized into SharedPreferences) and create every time a new httpclient instance (then set the cookie to the new instance) => overhead to get the http connection - other ?

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Android :: Use HTTP/1.0 In HttpClient

May 26, 2010

By default HttpClient use HTTP/1.1 protocol, is there any way to change it to HTTP/1.0?

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Android :: SSL Certificate HTTPClient

May 28, 2009

I had configure a Tomcat webserver with SSL and client autification. So I need a clienKey.p12 File to visit the site. If I import the key into Firefox, it works fine.

So I tried to develop a Client from "normal" Java. That works:


Now I try to develope a Client into Android and I am getting crazy....

Here my two Android implementation:


I always geht the following Exception:


But the key is the same that I use for the "normal" java Client and for the import into firefox. So the key is valid. But it is signed by me... I don't want to sign it by a commercial Company like verisign.

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Android :: HttpClient And HTTPS?

Apr 8, 2010

I'm new to implementing HTTPS connections in Android. Essentially, I'm trying to connect to a server using the org.apache.http.client.HttpClient. I believe, at some point, I'll need to access the application's keystore in order to authorize my client with a private key. But, for the moment, I'm just trying to connect and see what happens; I keep getting an HTTP/1.1 400 Bad Request error.

I can't seem to make heads or tails of this despite many examples (none of them seem to work for me). My code looks like this (the BODY constant is XmlRPC):


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Android :: Get Web Results From HttpClient?

Jun 19, 2010

For example: Say I searched something on the Walmart homepage. Like this. How would I retrieve the information from the first product listed. Information like product name, price, details, rating, model. And how would I search in the box.

The only way it seems like to me is to replace


Then replace someProduct with the seach and call it in an HttpClient.

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Android :: Httpclient And Selfsigned Certificates

Jun 25, 2010

I am using httpclient for my android app and I have a local site which has a few https pages. Since default httpclient doesnot allow self-signed certificates I am using "EasySSLFactory" and "EasyX509TrustManager", which are mentioned in httpclient documentation.


The problem is if I use this SSLFactory in my android app, I am getting correct response from my site's https pages, but I get "SSL handshake failure: I/O error during system call, Unknown error: 0" for sites such as "", "". If I don't use. "EasySSLSocketFactory" I get response from these sites but get exception for my site.

This page fetch code works fine as a standalone java application.

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Android :: How To Set Up An SSL Cert That HttpClient Will Accept?

May 7, 2010

I'm connecting to a REST service using HttpClient under Android. I'd like to be able to write code where I could pull the host, port, etc. out of a properties file and not have to write fake Schemes and other things like that in order to do the development work. In other words, the live site will have a cert. The dev site will have a self-signed cert or a CA cert. Either way, I need the code to seamlessly work with both kinds of certs if possible. Can someone point me in the right direction?

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Android :: Disable XSL Transforms In HTTPClient

Apr 21, 2009

Does anyone know how to avoid the XSL transforming that is taking place in the HTTPClient? I just want the raw xml.

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Android :: HTTPClient Post Delay?

Nov 16, 2010

I am having a hugely annoying issue with delays using HTTPClient and post the first time I call execute on the client the response takes 5 seconds to come back. Subsequent calls take around 100 to 200 ms. I am using the Apache client so does anyone know why this takes so long? The client setup looks like below


The timing for this look like below.


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Android :: Httpclient Redirect Handler

Nov 9, 2010

I'm trying to call a web server that is using relative URL redirects for some of the calls. This of course isn't working with DefaultHttpClient as it isn't treating it as a relative URL. I've gotten as far as implementing a RedirectHandler in an attempt to catch the redirect and add in the base call but I can't work out how to get the location of the redirect.

With the following method how do I go about finding out where I am being redirected to? I can't find any fields on either response or context that have what I need and I don't know where else to look.

public URI getLocationURI(HttpResponse response, HttpContext context)

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Android :: One Vs Many Instances Of HttpClient Per Application

Oct 23, 2009

Until recently, our app shared a single Apache HttpClient instance using the ThreadSafeClientConnManager across the whole application. The http client instance was held by a singleton class.

Since I dislike the singleton pattern for its numerous problems, I refactored our API accessor to be a per-thread object, but now for every thread (which mostly means per Activity/Service in our case) a new HttpClient instance is created.

It's not that I have problems with this new approach, but I've read that the Apache folks suggest to only have one instance per app for performance reasons.

Visually, what we did before was this:

HttpClient (thread safe)

Now, we do this:

Activity1 ... ActivityN
| |
| |
HttpClient1 HttpClientN

How do you guys do this in your applications? If you share one single HttpClient across your app and potentially many concurrent threads, how do you handle access to it?

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Android :: Network Access With HttpClient Using AsyncTask

Mar 16, 2010

I am trying to use a certain wrapper of HttpClient, called HTTPRequestHelper with an associated responseHandler as the basic class for my wrapper to a web service which is implemented as a singleton.

HTTPRequestHelper and samples of usage are described in chapter 6 of "Unlocking Android" published by Manning.

My problem is that invoking both the helper and the handler from a thread started on the main UI thread (either from an AsyncTask or directly) works only sporadically.

Here is the basic setup.

public class APIService { private ArrayList<Something> myThing;


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