The probable features that the final release of Android M
will likely sport are gradually coming to surface. You probably recall the lusted-after multi-window
feature that got quickly discovered a while ago, right?
As you probably know, Lollipop came with dynamic status bar background colors, which can be changed by the app you're currently running; still, the color of the status bar icons (clock, battery, and other default ones) is fixed and they only appear in white. Yet, this might make them a bit unreadable provided that the background is lighter.
Today, we have a new small feature that will likely arrive with Android M later this year. Revealed by Roman Nurik, a design advocate over at Google, the M release will come with status bar icons that will dynamically change their color theme depending on the brightness of the status bar background.
A new flag ("windowLightStatusBar") discovered in the M Developer Preview will enable developers to instruct the Android system to switch the default white status bar theme to a darker one.
Hopefully, developers will embrace this newly-found feature and update their apps with this neat functionality once Android M becomes official later this year.
source: Roman Nurik