ListView scrolling using UniversalImageDownloader not smooth

Question

I am using a ListView containing images. These images are loaded from the Internet inside the adapter. Therefore I am using the UniversalImageDownloader.

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Answer 1

@Sergey Pekar: You saved my life! :) I always used UIL for ListView for a small count of images, but then as the count got bigger I got always a lag on the first load (while scrolling) of the images. So I also tried the delay and it helped a little bit and other UIL configs and options, but I was not happy. Then I've tried different Image-Loading-Libraries (Picasso, AQuery, Volley, UrlImageViewHelper, custom code). They all worked faster(on first load) than UIL but they did not have enough options for me. So I looked for the last 2 days for a solution regarding this lag-problem and thanx god I finally found your post here! The solution was the PauseOnScrollListener!

What also (addtionally to the PauseOnScrollListener) improves a little bit the scroll-smoothness is by extending the ImageView to stop requestLayout like this:

public class CustomImageView extends ImageView
{
    public CustomImageView (Context context, AttributeSet attributeset, int int_style)
    {
        super(context, attributeset, int_style);
    }

    public CustomImageView (Context context, AttributeSet attributeset)
    {
        super(context, attributeset);
    }

    public CustomImageView (Context context)
    {
        super(context);
    }

    @Override
    public void requestLayout() 
    {
        // Do nothing here
    }
}

For more info see this post:
ListView very slow when scrolling (using ViewHolder/recycling)