Android O preview – features and changes

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Bytes: Google has released the second Android O developer preview during Google I/O few days back. Like last year, Google dropped the first preview build for the upcoming Android version a couple of months ahead of I/O. As always, we’ve been busy and have brought together some of the changes, features and things you should know about Android O.

If you are on Developer Preview 2, open the display settings, and you can find for device theme. These again have two options. First one is ‘Pixel’ and the second one ‘android.auto_generated_rro_.’ Previously in Developer Preview 1, the two options were “Pixel” and “Inverted.”

RRO Custom Theme Engine:

According to XDA, this Sony’s Runtime Resource Overlay (RRO) theming framework is well-developed and used in many Android ROMs. So, if you’re familiar with modding stuff you might come across Layers themes. It is the custom theme engine in some Custom ROMs like SlimRoms. Layers theming is completely based Sony’s RRO framework with slight changes. At the base level, they work very similarly.

So the developer Maxr1998 tested by installing some of the Layers themes and they showed up in the section.You can see a list of overlay APKs installed by Maxr1998 on Android O Developers preview.


A familiar phrase and tool in many televisions, within the YouTube app on Android and, yes, in iOS. Google is adding a Picture-in-Picture mode to Android O. With a YouTube video playing, just tap the Home button and the video will pop into a small window that can remain on screen as you navigate other apps on your device. You can slide the video around for best placement, then simply slide it off the screen to terminate. Available now in the Android O Beta.


There’s no guarantee that theme enginge feature will remain same in the next Android O builds. It’s possible that Google decides to test it for future needs. So, Google may ditch it entirely.

Moreover, RRO is very familiar in the development community. Already there are a tonne of RRO compatible themes available in the playstore. So, if Google decides to go with custom themes, it will open an array of opportunities to an already open market. At the same time, users can enjoy the colourful Android.

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