The first version of Android laid the foundation for the ecosystem with several groundbreaking features: Android Market
Android 1.5 "Cupcake" introduced the virtual keyboard, and 1.6 "Donut" added support for multiple screen resolutions. Android 2.0/2.1 "Eclair" improved accounts and sync, and 2.2 "Froyo" added support for Flash and tethering. Version 3.0 "Honeycomb" was a tablet-focused release, and 4.0 "Ice Cream Sandwich" unified the phone and tablet UI. Subsequent releases like 4.1 "Jelly Bean" (Project Butter), 4.4 "KitKat", 5.0 "Lollipop" (ART runtime), and 6.0 "Marshmallow" (App Permissions) continued to push the platform forward.
: The compiled Java code optimized for the Dalvik Virtual Machine (DVM). Android 1.0 relied entirely on DVM before Google transitioned to Android Runtime (ART) years later.
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However, in 2024, Google is pushing the . While the AAB is not an APK (it is a publishing format), the final output delivered to your phone is still... an APK matching the device specifics.