Android 17 (API Level 37, codenamed Cinnamon Bun) released June 16, 2026, introduces breaking changes and new APIs developers must address. Key changes include mandatory adaptive UI enforcement on large screens (tablets/foldables can no longer opt out of resizability), mandatory ACCESS_LOCAL_NETWORK runtime permission, a new Contact Picker replacing READ_CONTACTS, a 3-hour OTP SMS delay for targeted apps, and background audio restrictions requiring migration from ExoPlayer 2 to Media3. Under the hood, ART gains generational garbage collection, a lock-free MessageQueue implementation, and static final field modification via reflection is now blocked. New APIs include the Handoff API for multi-device state continuity, dynamic camera output surfaces, RAW14 image format, VVC (H.266) video decoding, and Encrypted Client Hello for TLS. Google Play will require API 37 targeting starting August 2027.
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