在新的 Android SDK 中，我认为所有图标都变成了纯色.

In the new Android SDKs I think all icons are turned into a plain color.

查看这个问题，该问题提供了 Lollipop 通知颜色的一些解决方案.

Look into this question that provides some solutions in notification colors in Lollipop.

通知栏图标在 Android 5 Lollipop 中变为白色一个>