Android aplikacija i dohvat podataka

Code:

public static Bitmap getBitmapFromUrl(String url, String imageName, int module, int topic) {
        if (url == null) {
            return null;
        }
        File SDCardRoot = Environment.getExternalStorageDirectory();
        
        Bitmap bm = BitmapFactory.decodeFile(SDCardRoot.toString()+SDCARD_PHOTOS_FOLDER+"/"+module+"/"+topic+"/"+imageName);
        if(bm!=null) {
            return bm;
        }
        HttpGet httpGet = null;
        httpGet = new HttpGet(URI.create(url + imageName));
        HttpClient httpClient = getThreadSafeClient();

        try {
            HttpResponse response = (HttpResponse) httpClient.execute(httpGet);
            HttpEntity entity = response.getEntity();
            BufferedHttpEntity bufHttpEntity = new BufferedHttpEntity(entity);
            InputStream inputStream = bufHttpEntity.getContent();
            Bitmap bitmap = BitmapFactory.decodeStream(inputStream);
            if (bitmap == null) {
                return null;
            }
            
            File dir = new File(SDCardRoot.toString()+SDCARD_PHOTOS_FOLDER+"/"+module+"/"+topic);
            dir.mkdirs();
            File file = new File(dir,imageName);
            FileOutputStream fileOutput = new FileOutputStream(file);
            bitmap.compress(CompressFormat.JPEG, 100, fileOutput);
            //close the output stream when done
            fileOutput.flush();
            fileOutput.close();
            getDatabaseUtilities().setPhotoDownlaoded(imageName, true);
            
            return bitmap;
        } catch (ClientProtocolException e) {
             e.printStackTrace();
        } catch (IOException e) {
             e.printStackTrace();
        }
        return null;
    }

Code:

public static DefaultHttpClient getThreadSafeClient()  {

        DefaultHttpClient client = new DefaultHttpClient();
        ClientConnectionManager mgr = client.getConnectionManager();
        HttpParams params = client.getParams();
        client = new DefaultHttpClient(new ThreadSafeClientConnManager(params, 
                mgr.getSchemeRegistry()), params);
        return client;
    }