Android sending image to Server via MultipartEntity - setting Content-type?

Question

I've read many many posts about sending an image to the server from an Android app and Content-type-wise, they are divided in three categories:

a) they dont set the content-type at all and probably somehow their code works

b) they are using deprecated methods

c) they are using completely different approach from the one I've selected.

I would like to send the file over to the server and store it in a folder.

My code is a total patchwork, a butchery job that I managed to come up with after reading lots of posts and articles, here is it:

public void uploadImageToServer(String imagePath) throws Exception {

    try {

        // set the http handlers
        httpClient = new DefaultHttpClient();
        localContext = new BasicHttpContext(); // why do I need this?
        postRequest = new HttpPost("http://asd.com/asd.php"); 
        //postRequest.addHeader("Content-type", "image/jpeg"); // - this didnt work

        // deal with the file
        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
        bitmap = BitmapFactory.decodeFile(imagePath);
        bitmap.compress(CompressFormat.JPEG, 75, byteArrayOutputStream); 
        byte[] byteData = byteArrayOutputStream.toByteArray();
        //String strData = Base64.encodeToString(data, Base64.DEFAULT); // I have no idea why Im doing this
        ByteArrayBody byteArrayBody = new ByteArrayBody(byteData, "image"); // second parameter is the name of the image (//TODO HOW DO I MAKE IT USE THE IMAGE FILENAME?)

        // send the package
        multipartEntity = MultipartEntityBuilder.create();
        multipartEntity.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
        multipartEntity.addPart("uploaded_file", byteArrayBody);

        postRequest.setEntity(multipartEntity.build());

        // get the response. we will deal with it in onPostExecute.
        response = httpClient.execute(postRequest, localContext);
        bitmap.recycle();
    } catch (Exception e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}

And the error is:

 FATAL EXCEPTION: AsyncTask #1
 java.lang.RuntimeException: An error occured while executing doInBackground()
android.os.AsyncTask$3.done(AsyncTask.java:200)
 java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:274)
java.util.concurrent.FutureTask.setException(FutureTask.java:125)
java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:308)
java.util.concurrent.FutureTask.run(FutureTask.java:138)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088)
 java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581)
 java.lang.Thread.run(Thread.java:1019)
Caused by: java.lang.NoClassDefFoundError: org.apache.http.entity.ContentType
 org.apache.http.entity.mime.content.ByteArrayBody.<init>(ByteArrayBody.java:67)
 org.apache.http.entity.mime.content.ByteArrayBody.<init>(ByteArrayBody.java:87)

Answer 1

If you are using a library, you need to put it into /libs folder.

EDIT:

download httpmime, httpcore and httpclient library from http://hc.apache.org/downloads.cgi