Reload on scroll

[norm2016]

All the images and text are reloaded when I scroll.
Sense I have to download all the data I wanted to avoid this "issue".
If I use if (convertView == null) { ... } else { vh = (ViewHolder) convertView.getTag(); } all the data is messed up , so I removed this part ( and works just fine ) but every time I scroll all the data is reloaded.
And while the data is downloading all the fields, images etc. are blank.