Android 17 is out, rolling to most supported Pixel phones from June 16. The headline for developers isn't a feature so much as a line in the sand: apps that target the new platform must support large-screen resizability, ending the era of letterboxed tablet and foldable experiences that Google has been nudging against for years. If you ship an Android app and have been ignoring the foldable, this is the release that stops letting you. The rest is plumbing worth knowing about. There are now device-RAM-based memory limits aimed at catching the worst memory leaks before they destabilize the whole system, and the Safer Dynamic Code Loading protection extends to native libraries — anything loaded through System.load() has to be marked read-only or you get an UnsatisfiedLinkError at runtime. Certificate transparency is on by default. None of it breaks you unless you target API level 17, but the resizability requirement is the one to test against early.