支持库23.1.1中的AppBarLayout.setExpanded（boolean，true）奇怪的动画 [英] AppBarLayout.setExpanded(boolean, true) weird animation in support library 23.1.1

问题描述

在我的应用中，我使用 setExpanded（boolean，true）在特定事件上扩展或缩小 AppBarLayout 。

In my app I expand or contract the AppBarLayout on a specific event using setExpanded(boolean, true).

使用 com.android.support:design:23.1.0 ，然后我将其更新为 23.1.1 ，动画变得非常慢，而且一点也不活泼。

I've got a good result, with a snappy and fluid animation using com.android.support:design:23.1.0, then I updated to 23.1.1 and the animation got very slow and not snappy at all.

在 android.support.design.widget.AppBarLayout 的源代码中，我在 animateOffsetTo 中找到了问题（在公共静态类下的行为扩展HeaderBehavior< AppBarLayout> ），在版本23.1.0中是这样的：

In the source code of android.support.design.widget.AppBarLayout, I located the problem in animateOffsetTo (under public static class Behavior extends HeaderBehavior<AppBarLayout>), that in the version 23.1.0 was like this:

private void animateOffsetTo(final CoordinatorLayout coordinatorLayout,
    final AppBarLayout child, int offset) {
   if (mAnimator == null) {
       mAnimator = ViewUtils.createAnimator();
       mAnimator.setInterpolator(AnimationUtils.DECELERATE_INTERPOLATOR);
       mAnimator.setUpdateListener(new ValueAnimatorCompat.AnimatorUpdateListener() {

           @Override
           public void onAnimationUpdate(ValueAnimatorCompat animator) {
               setHeaderTopBottomOffset(coordinatorLayout, child,
                    animator.getAnimatedIntValue());
           }
       });
   } else {
       mAnimator.cancel();
   }
   mAnimator.setIntValues(getTopBottomOffsetForScrollingSibling(), offset);
   mAnimator.start();
}

在版本23.1.1中是这样的：

And in the version 23.1.1 is like this:

private void animateOffsetTo(final CoordinatorLayout coordinatorLayout,
    final AppBarLayout child, final int offset) {
   final int currentOffset = getTopBottomOffsetForScrollingSibling();
   if (currentOffset == offset) {
       if (mAnimator != null && mAnimator.isRunning()) {
           mAnimator.cancel();
       }
       return;
   }
   if (mAnimator == null) {
       mAnimator = ViewUtils.createAnimator();
       mAnimator.setInterpolator(AnimationUtils.DECELERATE_INTERPOLATOR);
       mAnimator.setUpdateListener(new ValueAnimatorCompat.AnimatorUpdateListener() {
           @Override
           public void onAnimationUpdate(ValueAnimatorCompat animator) {
            setHeaderTopBottomOffset(coordinatorLayout, child,
                    animator.getAnimatedIntValue());
           }
       });
   } else {
       mAnimator.cancel();
   }
   // Set the duration based on the amount of dips we're travelling in
   final float distanceDp = Math.abs(currentOffset - offset) /
        coordinatorLayout.getResources().getDisplayMetrics().density;
   mAnimator.setDuration(Math.round(distanceDp * 1000 / ANIMATE_OFFSET_DIPS_PER_SECOND));
   mAnimator.setIntValues(currentOffset, offset);
   mAnimator.start();
}

如何更改扩展/收缩动画并使其更快？

How can I change the expand/contract animation and make is faster?

推荐答案

已报告并解决了该问题

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