In a spec update timed perfectly for Pi day, Google has introduced some interesting new guidelines for developers and designers including - love it or hate it - bottom bar navigation.

Besides bottom bars (which we'll talk about in just a moment), Google has new guidance on split screen design (for Android only right now), advice for displaying passwords in input fields, and expanded guidance on accessibility including color, contrast, sound, motion, and hierarchy.

Back to bottom bars, though. We've seen this navigation pattern emerging in Photos and Google+ over the past months, and we've been questioning whether it might become A Thing on Android just as long.

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