NoClassDefFoundError on MultiPart compilable method in Android

Question

I'm dealing with the following problem: when trying to upload an image through MultiPart Entity and it seems that the several updates on HttpClient/MIME are cracking everything. I'm trying the following code, but it fails with a NoClassDefFoundError:

public static void executeMultipartPost(File image, ArrayList<Cookie> cookies, String myUrlToPost) {
    try {
        // my post instance
        HttpPost httppost = new HttpPost(myUrlToPost);
        // setting cookies for the connection session
        if (cookies != null && cookies.size() > 0) {
            String cookieString = "";
            for (int i=0; i<cookies.size(); ++i) {
                cookieString += cookies.get(i).getName()+"="+cookies.get(i).getValue()+";";
            }
            cookieString += "domain=" + BaseUrl + "; " + "path=/";
            httppost.addHeader("Cookie", cookieString);
        }
        // creating the http client
        HttpClient httpclient = new DefaultHttpClient();
        // creating the multientity part [ERROR OCCURS IN THIS BELLOW LINE]
        MultipartEntity multipartEntity = new MultipartEntity();
        multipartEntity.addPart("photoupload", new FileBody(image));
        httppost.setEntity(multipartEntity);
        HttpResponse response = httpclient.execute(httppost);
        HttpEntity resEntity = response.getEntity();
    } catch (Exception e) {}
}

This method is fully compilable and uses the httpclient-4.0.1.jar and httpmime-4.2.jar libs, but again, it crashes on the commented line for me.

Am I missing something?

Hi dark, thanks for the fast answer. Yeah, I seens to be reasonable to try a project cleaning. I've also cleaned it before, with no results. I believe (but not so sure) that he error comes from the updates in .jars, where it is in method missings or in conflicted versions. — Marcelo, Jun 05 '12 at 17:09
Interesting post, gtumca. I have just removed (unchecked) all my .jar files from the project and coincidentally, I'm getting a compile-time error in the line that I receive the error in the run/execution time. I gonna check it... — Marcelo, Jun 05 '12 at 17:32

score 4 · Accepted Answer · answered Jun 05 '12 at 18:26

Ok, here you have libraries needed for Multipart post, all credits to Satya Komatineni and David Maclean, writers of Pro Android 3 and now 4 and I quote from their book

To do multipart POST calls, you need to get three additional Apache open source projects: Apache Commons IO, Mime4j, and HttpMime. You can download these projects from the following web sites: Commons IO: http://commons.apache.org/io/ Mime4j: http://james.apache.org/mime4j/ HttpMime: http://hc.apache.org/downloads.cgi (inside of HttpClient)

score 1 · Answer 2 · answered Jun 05 '12 at 16:56

1

I have the same problem and it was fixed by moving jars files into 'libs' directory in your android project.

answered Jun 05 '12 at 16:56

Sergey Vakulenko

1,655
18
23

Hi Sergey, thanks for the answer. My .jar files are already in the "libs" folder. Have you succeded in this multipart implementation? Which jars have you used? Thanks in advance. – Marcelo Jun 05 '12 at 17:13
I mean same problem with jar files and httpclient jar. I'm using httpClient indirectly, with asyncHttp project http://loopj.com/android-async-http/ which delivery jar library. – Sergey Vakulenko Jun 06 '12 at 07:27

score 0 · Answer 3 · answered Jun 05 '12 at 16:36

0

Make sure the jar is checked in the projects build path. (Project -> Properties)

answered Jun 05 '12 at 16:36

Phix

9,364
4
35
62

Hi Phyx, thanks for the answer. My .jars are already all checked (inserted/integrated) in my project. – Marcelo Jun 05 '12 at 17:15

NoClassDefFoundError on MultiPart compilable method in Android

3 Answers3