Implementing “withDelay” in Picasso Android (for skimming)

Question

When dealing with many scrolling images, you have to avoid the problem of loading while skimming, while the user is fast scrolling. The simplest and often best solution is r

Answer 1

The ability to pause/resume a request will be part of the next release of Picasso 2.4 Just yesterday a pull request containing this feature has been merged in the main branch. It allows to easily define a scroll listener that pauses/resume Picasso while flinging, as shown in the sample code reported below:

public class SampleScrollListener implements AbsListView.OnScrollListener {
  private final Context context;

  public SampleScrollListener(Context context) {
    this.context = context;
  }

  @Override
  public void onScrollStateChanged(AbsListView view, int scrollState) {
    final Picasso picasso = Picasso.with(context);
    if (scrollState == SCROLL_STATE_IDLE || scrollState == SCROLL_STATE_TOUCH_SCROLL) {
      picasso.resumeTag(context);
    } else {
      picasso.pauseTag(context);
    }
  }

  @Override
  public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount,
                       int totalItemCount) {
    // Do nothing.
  }
}