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.setDuration(300);
mAnimator.start();
}
@Override
public void start() {
animator.start();
}