NumberPadTimePickerBottomSheetComponent.java 文件源码

@NonNull
private ValueAnimator createFabIconTintAnimator(int[] colors) {
    ValueAnimator anim = newArgbValueAnimator(colors);
    anim.setDuration(FAB_ANIM_DURATION);
    anim.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
        @Override
        public void onAnimationUpdate(ValueAnimator animation) {
            DrawableCompat.setTintList(mOkButton.getDrawable(), ColorStateList.valueOf(
                    (int) animation.getAnimatedValue()));
        }
    });
    return anim;
}