java

final int fileId = 2641910;

QBContent.downloadFileTask(fileId, new QBEntityCallbackImpl<InputStream>(){

    @Override
    public void onSuccess(final InputStream inputStream, Bundle params) {
        long length = params.getLong(Consts.CONTENT_LENGTH_TAG);
        Log.i(TAG, "content.length: " + length);
        
            Thread thread = new Thread() {
                @Override
                public void run() {
                    try {
                        while(true) {
                            byte[] data = ByteStreams.toByteArray(inputStream);
                        }
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            };

            thread.start();
    }

    @Override
    public void onError(List<String> errors) {
                   handleErrors(errors);
    }
}, new QBProgressCallback() {
    @Override
    public void onProgressUpdate(int progress) {
        Log.i(TAG, "progress: " + progress);
    }
});