@Override
    protected Void doInBackground(String... params) {
        InputStream inputStream =  null;
        FileOutputStream fileOutput =  null;
        try {
            URL url = new URL(params[0]);
            File file = new File(path);
            URLConnection urlConnection = url.openConnection();

            inputStream = urlConnection.getInputStream();
            fileOutput = new FileOutputStream(file);

            int totalSize = urlConnection.getContentLength();
            int downloadedSize = 0;

            byte[] buffer = new byte[16384];
            int bufferLength = 0;

            while ((bufferLength = inputStream.read(buffer)) > 0 ) {

                while(isPaused) {
                    sleep();
                }

                if(isCancelled()) {
                    if(file.exists())
                        file.delete();
                    return null;
                }

                fileOutput.write(buffer, 0, bufferLength);
                downloadedSize += bufferLength;
                publishProgress(downloadedSize, totalSize);
            }

            if(totalSize > getFreeMemorySize()) {
            //if(true) {
                if(errorHandler != null)
                    errorHandler.onMemorySizeException();
                cancel(true);
            }
        } catch (IOException e) {
            int i = e.hashCode();
            e.getStackTrace();
        }
        finally {
            try {

                if(inputStream != null)
                    inputStream.close();
                if(fileOutput != null)
                    fileOutput.close();

            } catch (IOException e) {
                int i = e.hashCode();
                e.getStackTrace();
            }
        }
        return null;
    }