Super ultra mega HD resolution support is coming to a robot-themed OS near you, but before we get into that, let's talk about Android and DPI.

screens-ranges

Android devices come in tons of different resolutions, everything from a tiny 128x128 watch screen to the massive 2560x1600 resolution of the Nexus 10. Higher resolution screens need higher resolution apps with higher resolution image files. It doesn't make sense to serve up super-high resolution assets to low resolutions screens, so to make sure the right screens get the right size files, Android has several generalized DPI categories for image assets.

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