Android adapter (recycler views) with assyncTask image downloader

Question

I use a adapter with recycled views (holder). This is the code:

@Override
public View getView(int position, View convertView, ViewGroup parent)  {

    ViewHolder holder;

    if (convertView == null) {
        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        convertView = inflater.inflate(R.layout.playlists_item, null);

        holder          = new ViewHolder();

        holder.picture  = (ImageView)   convertView.findViewById(R.id.playlist_picture);
        holder.name     = (TextView)    convertView.findViewById(R.id.playlist_name);
        holder.desc     = (TextView)    convertView.findViewById(R.id.playlist_desc);
        holder.play_bt  = (ImageView)   convertView.findViewById(R.id.playlist_play);

        convertView.setTag(holder);
    } else {
        holder = (ViewHolder) convertView.getTag();
    }

    holder.picture.setImageResource(R.drawable.placeholder);

    ...

if(messages.get(position).containsKey("IMAGE"))
            {
                if(global.isInCache(messages.get(position).get("IMAGE")))
                    holder.picture.setImageBitmap(global.getBitmap(messages.get(position).get("IMAGE")));
                else{
                    holder.picture.setTag("http://**********" + messages.get(position).get("IMAGE"));
                    new loadImageTask().execute(holder.picture,cache,messages.get(position).get("IMAGE"),"********/upload/********/");
                }
            }

And this is my downloader:

public class loadImageTask extends AsyncTask< Object , Void, Void>
{
    ...

    @Override
    protected void onPreExecute() {

    }

    @Override
    protected Void doInBackground(Object... params) {
        imagem = (ImageView) params[0];
        image_tag = (String)imagem.getTag();
        caminho = (String) params[3];
        name = (String) params[2];
        imgLoad = LoadImageFromWeb(caminho+name);

        return null;
    }

    @Override
    protected void onPostExecute(Void result) {

        if (imgLoad instanceof BitmapDrawable) { 
            bitmap = ((BitmapDrawable)imgLoad).getBitmap();
        }

        bitmap = getResizedBitmap(bitmap, 100, 100);

        global.putCache(name, bitmap);

        imagem.setImageBitmap(bitmap);
    }
}

It turns out that when I scroll in listview when the download is finished, the image is loaded me in the position visible (and in the same position of the listview when scrolling is fast, the image is always being changed every time a download is finished).

I wish, if the position of the image that you are downloading to be done, is no longer visible, it is not done setImageBitmap

Better you try this: http://stackoverflow.com/a/3068012/379693 — Paresh Mayani, Jun 20 '12 at 09:23
Don't work... the problem is the same. the fist position image is constantly refresh every time as a download complete... — marceloamx, Jun 20 '12 at 09:39

score 0 · Answer 1 · answered Oct 16 '18 at 16:40

try Picasso or Glide library

     Picasso.get().load(url)
     .placeholder(R.drawable.iconname)
     .error(R.drawable.iconname)
      .into(/*your image view*/);

    Glide.with(context)
     .load("http://inthecheesefactory.com/uploads/source/glidepicasso/cover.jpg")
     .into(ivImg);

Android adapter (recycler views) with assyncTask image downloader

1 Answers1