public void testGetColorWithAlpha() {
assertEquals(
Color.parseColor("#00123456"),
ScrollUtils.getColorWithAlpha(0, Color.parseColor("#FF123456")));
assertEquals(
Color.parseColor("#FF123456"),
ScrollUtils.getColorWithAlpha(1, Color.parseColor("#FF123456")));
}
/* TOOLBAR ANIMATIONS */
private void updateScroll(int scrollY) {
float alpha =
Math.min(
1,
(float) scrollY / (flexibleSpaceHeight - binding.rlAdvertisementInfo.getHeight() - 25));
binding.toolbar.setBackgroundColor(ScrollUtils.getColorWithAlpha(alpha, toolbarColor));
binding.toolbar.setTitleTextColor(ScrollUtils.getColorWithAlpha(alpha, titleColor));
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
detailsView.changeStatusBarColor(ScrollUtils.getColorWithAlpha(alpha / 4, statusBarColor));
}
binding.rlAdvertisementInfo.setAlpha(1 - ((float) scrollY / (flexibleSpaceHeight / 3)));
}
@Override
public void onScrollChanged(int scrollY, boolean firstScroll, boolean dragging) {
int baseColor = getResources().getColor(R.color.Dark);
float alpha = Math.min(1, (float) scrollY / mParallaxImageHeight);
mToolbarView.setBackgroundColor(ScrollUtils.getColorWithAlpha(alpha, baseColor));
ViewHelper.setTranslationY(convenientBanner, scrollY / 2);
}
private void initViews(View itemView) {
convenientBanner = (ConvenientBanner) itemView.findViewById(R.id.convenientBanner);
mToolbarView = itemView.findViewById(R.id.toolbar);
mToolbarView.setBackgroundColor(
ScrollUtils.getColorWithAlpha(0, getActivity().getResources().getColor(R.color.Dark)));
mScrollView = (ObservableScrollView) itemView.findViewById(R.id.scroll);
mScrollView.setScrollViewCallbacks(this);
mParallaxImageHeight = getResources().getDimensionPixelSize(R.dimen.parallax_image_height);
}