Android 1.x refers to the initial series of releases of the Android operating system, a Linux‑based platform for mobile devices developed by Google. The series comprises four public versions: Android 1.0, Android 1.1, Android 1.5 (codenamed “Cupcake”), and Android 1.6 (codenamed “Donut”). These releases were issued between September 2008 and September 2009 and established the core architecture, user interface concepts, and application framework that underpin later versions of Android.
Release chronology and key features
| Version | Codename | Release date | Notable features |
|---|---|---|---|
| 1.0 | – | 23 September 2008 | First commercial Android build; basic home screen, web browser, Gmail, Maps, and the Android Market (now Google Play). |
| 1.1 | – | 9 February 2009 | Minor API additions, support for additional screen sizes, and bug fixes; introduced “Android Beam” preview (later removed). |
| 1.5 | Cupcake | 27 April 2009 | First major update; on‑screen keyboard, widgets, video recording, USB OTG support, landscape virtual keyboard, and expanded Android Market. |
| 1.6 | Donut | 15 September 2009 | Support for multiple screen densities, CDMA networks, expanded camera functions, improved Android Market, and a revamped search widget. |
Technical characteristics
- Kernel: Modified Linux kernel (2.6.26 for 1.0/1.1, 2.6.29 for 1.5/1.6).
- Programming languages: Primarily Java for application development; native code via the Android NDK introduced later (not part of 1.x).
- User interface: Home screen with static shortcuts and widgets; system bar with navigation buttons; default launcher (Android Launcher).
- Application framework: Core APIs include
android.app,android.content,android.view, andandroid.widget. The API level numbers are 1 (1.0), 2 (1.1), 3 (1.5), and 4 (1.6). - Distribution: Initial devices included the HTC Dream (T-Mobile G1) and HTC Desire; the Android Market provided first‑party and third‑party applications.
Historical significance
Android 1.x laid the groundwork for the rapid expansion of the Android ecosystem. It introduced the concept of an open, Google‑curated application marketplace and established a modular, extensible framework that allowed manufacturers and developers to create a diverse range of devices and software. The versions in this series also marked the shift from experimental prototypes to a commercially viable mobile operating system, setting the stage for the subsequent 2.x “Eclair” release and the massive market share growth that followed.
