ProgressBar in asynctask is not showing on upload

Question

Can someone tell me, why progressbar isnt showing when picture is being uploaded. I copied asynctask structure from my old project where it works. In my old project i use as

Answer 1

I found this library which is perfect to accomplish the upload task and also provide a progress handler which could be used to set the value of a ProgressBar:

https://github.com/nadam/android-async-http

It could be used like the following... Set onClickHandler for the upload Button:

@Override
public void onClick(View arg0) {
    try {
        String url = Uri.parse("YOUR UPLOAD URL GOES HERE")
                .buildUpon()
                .appendQueryParameter("SOME PARAMETER IF NEEDED 01", "VALUE 01")
                .appendQueryParameter("SOME PARAMETER IF NEEDED 02", "VALUE 02")
                .build().toString();

        AsyncHttpResponseHandler httpResponseHandler = createHTTPResponseHandler();

        RequestParams params = new RequestParams();
        // this path could be retrieved from library or camera
        String imageFilePath = "/storage/sdcard/DCIM/Camera/IMG.jpg";
        params.put("data", new File(imageFilePath));

        AsyncHttpClient client = new AsyncHttpClient();
        client.post(url, params, httpResponseHandler);
    } catch (IOException e) {
        e.printStackTrace();                
    }
}

then add this method to your activity code:

public AsyncHttpResponseHandler createHTTPResponseHandler() {
    AsyncHttpResponseHandler handler = new AsyncHttpResponseHandler() {
        @Override
        public void onStart() {
            super.onStart();
        }

        @Override
        public void onProgress(int position, int length) {
            super.onProgress(position, length);

            progressBar.setProgress(position);
            progressBar.setMax(length);
        }

        @Override
        public void onSuccess(String content) {
            super.onSuccess(content);
        }

        @Override
        public void onFailure(Throwable error, String content) {
            super.onFailure(error, content);
        }

        @Override
        public void onFinish() {
            super.onFinish();
        }
    };

    return handler;
}