Tried to fix an AsyncTask so it loads a Bitmap from an ArrayList to a ImageView every second

Slider AsyncTask

class GetImagesTask extends AsyncTask<Long, Bitmap, Void>{
  @Override
  protected ArrayList<Bitmap> doInBackground(Long... id) {
      long projectId = id[0];
      Project project = getProject(projectId);
      ArrayList<Bitmap> i = new ArrayList<Bitmap>();      
      File[] files = MediaHelper.getProjectFilenames(project.getImagePath());
      if(files != null && files.length > 0){
          for(File aFile : files){
              Bitmap bitmap = MediaHelper.getScaledImage(aFile, screenSize.y / 2, screenSize.x / 2);
              i.add(bitmap);
              Log.d(TAG, "image added...size = " + bitmap.getByteCount());
          }

      }
      for (Bitmap b : i) {
        publishProgress(b);
        try{
          Thread.sleep(1000);
        }catch (InterruptedException e){
          Log.d(TAG, "Thread interrupted unexpectedly.");
        }
      }
      return i;                   
  }
  
  protected void onProgressUpdate(Bitmap... bitmaps) {
       Bitmap b = bitmaps[0];
       ivSlide.setImageBitmap(b);
       Log.d(TAG, "Setting ImageView image");
   }
}