ViewDragHelper animation listener

Question

I'm using ViewDragHelper to slide a view to a new location, and I'm trying to use viewDragHelper.smoothSlideViewTo(dragView, x, y). The question is: How do I get a notification after the slide animation is complete? I'm looking for a way to listen to the slide animation events (especially something like onSlideAnimationComplete() ). Any idea folks?

private boolean smoothSlideTo(float slideOffset) {
    final int topBound = getPaddingTop();
    int x = (int) (slideOffset * (getWidth() - transformer.getMinWidthPlusMarginRight()));
    int y = (int) (topBound + slideOffset * getVerticalDragRange());
    if (viewDragHelper.smoothSlideViewTo(dragView, x, y)) {
        ViewCompat.postInvalidateOnAnimation(this);
        return true;
    }
    return false;
}

see [this](https://gist.github.com/pskink/b747e89c1e1a1e314ca6) — pskink, May 06 '16 at 15:10
@pskink can you be more specific how is your code related to my question? I still don't know where to capture the animation complete event. — yongsunCN, May 06 '16 at 15:22
first read the docs, then see how i implemented animation support in my code, running my code would be helpful too — pskink, May 06 '16 at 15:39
i gave you not only idea but also the working code, did you read `viewDragHelper#smoothSlideViewTo` docs as i suggested? — pskink, May 06 '16 at 17:09
man, i appreciate your help, but i don't think you understood my question correctly — yongsunCN, May 06 '16 at 17:11
then pardon me, where do you put "onSlideAnimationComplete()" — yongsunCN, May 06 '16 at 17:14

score 0 · Answer 1 · edited May 27 '17 at 07:12

It seems viewdraghelper doesn't have listener or callback when doing animation, but you can solve it by implement onViewDragStateChanged and judge through its state, like this:

    @Override
    public void onViewDragStateChanged(int state) {
        if (state == 0) {
            if (settleDestX == contentView.getLeft() && swipeOverListener != null) {
                swipeOverListener.onSwipeOver(settlePosition);
            }
        }
    }

state==1 implies dragging, state==2 implies scrolling, state==0 implies idle.

ViewDragHelper animation listener

1 Answers1