If you are a fan of the Always On Display feature and you own an OLED-powered smartphone, one of the rumored upcoming features to the brand new Android 9.0 Pie will definitely excite you. Source code of Android 9 Pie Fellow colleagues over at XDA Developers found some interesting strings in the Android 9 source code hinting at enhanced Always On Display feature. According to the code, in one of the future Android Pie updates, you will be allowed to set a wallpaper to the Always On Display and it goes without saying, it will turn it into black and white to consume less...
Source: https://www.gsmarena.com/always_on_display_to_support_wallpapers_in_android_90_pie-news-32681.php