CODEWITHSUNDEEP
androidimagehttpmultipart
Marcelo
Marcelo

Reputation: 2095

NoClassDefFoundError on MultiPart compilable method in Android

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?

Upvotes: 1

Views: 1469

Answers (3)

Gaurav Agarwal
Gaurav Agarwal

Reputation: 19102

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)

Upvotes: 4

Sergey Vakulenko
Sergey Vakulenko

Reputation: 1667

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

Upvotes: 1

Phix
Phix

Reputation: 9910

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

Upvotes: 0

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