void UpdateStatusBarColor(ShellAppearance appearance)
{
var activity = AndroidContext.GetActivity();
var window = activity?.Window;
var decorView = window?.DecorView;
int statusBarHeight = AndroidContext.GetStatusBarHeight();
int navigationBarHeight = AndroidContext.GetNavigationBarHeight();
// we are using the split drawable here to avoid GPU overdraw.
// All it really is is a drawable that only draws under the statusbar/bottom bar to make sure
// we dont draw over areas we dont need to. This has very limited benefits considering its
// only saving us a flat color fill BUT it helps people not freak out about overdraw.
AColor color;
if (appearance != null)
{
color = appearance.BackgroundColor.ToPlatform(Color.FromArgb("#03A9F4"));
}
else
{
color = Color.FromArgb("#03A9F4").ToPlatform();
}
if (!(decorView.Background is SplitDrawable splitDrawable) ||
splitDrawable.Color != color || splitDrawable.TopSize != statusBarHeight || splitDrawable.BottomSize != navigationBarHeight)
{
var split = new SplitDrawable(color, statusBarHeight, navigationBarHeight);
decorView.SetBackground(split);
}
}