如何加载图像从远程php mysql blob与毕加索

我有一个MySQL数据库，那里有我想加载到Listview的图像blobs。

我正试图利用毕加索。但问题是我如何做一个POST请求，发送参数($_POST在PHP中)-将其转换为url，最后库加载到一个imageview?哪个是最好的选择?

我当前获取图像的实现如下:

 public View getView(final int position, View convertView, ViewGroup parent) {
    // TODO Auto-generated method stub
    ----------------------------
    ----------------------------

    if (!"N".equalsIgnoreCase(listOfPosts.get(position).getHasImage()) ) {
        if(mMemoryCache.get(postId)== null )
            new GetPrimaryImages(position, holder).execute(image);
        else
             holder.ivPrimaryImage.setImageBitmap(mMemoryCache.get(postId));
    }else {
        holder.ivPrimaryImage.setImageResource(R.drawable.search);
    }
    return rowView;
}

GetPrimaryImages类如下所示:

  public class GetPrimaryImages extends AsyncTask<Image, Void, Bitmap> {

    int mPosition;
    Holder mHolder;
    public GetPrimaryImages(int position, Holder holder){
        mPosition = position;
        mHolder = holder;
    }

    ImageView imageView = null;
    protected Bitmap doInBackground(Image... images) {
    this.imageView=images[0].getImg();

        // Building Parameters
        List<NameValuePair> params = new ArrayList<NameValuePair>();
        params.add(new BasicNameValuePair("postid",(String)(this.imageView.getTag()) ));
        JSONObject json;
        if(mHolder.position == mPosition)
             json = jsonParser.makeHttpRequest(CommonResources.getURL("get_primary_image"),
                    "POST", params);
        else {
            json = null;
            cancel(true);
        }

        if(json == null){
            //latch.countDown();
            return null;
        }
        Log.d("Fetching Image",imageView.getTag()+ json.toString());
        // check for success tag
        String TAG_SUCCESS = "success";
        try {
            int success = json.getInt(TAG_SUCCESS);
            if (success == 0) {
               image =  json.getString("primaryimage");
            }
        } catch (JSONException e) {
            e.printStackTrace();
        }
        return getImage(image);
    }

    protected void onPostExecute(Bitmap result) {
        if (mHolder.position == mPosition) {
            mMemoryCache.put((String) imageView.getTag(), result);
            imageView.setImageBitmap(result);
        }
    }



}