Since April 2009, the Android version has developed a code name, which is arranged in alphabetical order: cake, doughnut, chocolate mousse cake, upgraded Froyo, gingerbread, beehive and ice cream sandwich, released by jelly bean. By the end of 20 13, more than 5 million active devices were using jelly bean 4.2, the global major version of Android OS released by 201kloc-0/for commercial devices.
Android Business Edition (2007-2008)
Android alpha
Google and open handset alliance released at least two beta versions of Android in June 2007. In its temporary naming scheme, the fictional robot is named after its code name, and the codes of various versions are Astro Boy, Bender and R2-D2. Morelle created some mascot symbols. In April 2009, we adopted the naming scheme of Android 1.5 cakes and desserts, which has been released to the public.
Android beta
On September 5th, 2007, the beta version of android was released, and the development kit (SDK) was released on June 2nd, 2007. So September 5th, 2007 is the first birthday of Android. The release sequence of public beta SDK is as follows: 2007165438+1October16: m3-rc22a 2007 65438+February14: m3-rc37a 2008 February13. 18 Date: 0.9 2008: September 23rd 1.0-R 1 API Version History.
Android 1.0(API level 1)
The first commercial version of Android 1.0 was installed with the first Android device HTC Dream on September 23rd, 2008, which included the following functions of Android 1.0.
Android 1. 1(API level 2)
On February 9, 2009, the update of Android 1. 1 was originally only for HTC Dream. Android 1. 1 is called "Small Four Countries", although this name is not officially used. Update the solved bug, change the API of Android, and add some functions;
Android 1.5 cake (API3 level 3)
On April 27th, 2009, the update of Android 1.5 was released, based on Linux kernel 2.6.27. This is the first version to officially use the dessert project ("cake") based on the code name, and a theme will be used in all future versions. The update includes some new features and user interface revisions:
Android1.6 (API level 4)
On September 5th, 2009, Android1.6 SDK-called doughnut-was released, based on Linux kernel 2.6.29. The update includes many new features:
Android 2.0(API level 5)
On June 26th, 2009, 10, the SDK—— of Android 2.0-codenamed "Chocolate Cake" was released. Changes based on Linux kernel 2.6.29 include:
Android 2.0.1(API level 6)
Android 2. 1(API7 level)
Upgrade Froyo's Android 2.2-2.2.3 (API level 8)
20 10 The SDK for Android 2.2 (upgrading Froyo, frozen yogurt) was released on May 20th, based on Linux kernel 2.6.32.
Android 2.3-2.3.2 gingerbread (API level)
20 10 12.6, released in the SDK of Android 2.3 (gingerbread), based on Linux kernel 2.6.35. Changes in [46] [47] include:
Android 2.3.3-2.3.7 gingerbread (API 10)
Android 3.0 cellular (API 1 1 level)
February 22, 20 1 1, Android 3.0 (cellular) SDK-released-the only Android update-based on Linux kernel 2.6.36. The first device of this version, Motorola Xoom tablet, was launched on February 24th, 20 1 1 year. Updated features include:
Android 3. 1 cellular (API 12 level)
Android 3.2 cellular (API 13 level)
Most first-generation and second-generation devices that support Google TV use Cellular 3.2.
Android 4.0-4.0.2 ice cream sandwich (API 14 level)
The SDK is Android 4.0. 1 (ice cream sandwich), based on Linux kernel 3.0. 1, and released on 201,10 and 19. ] Google staff pointed out that Android 4.0' s "theoretically compatible with any Android" 2.3.x production equipment introduced many new functions for the source code update of Android 4.0, including:
Android 4.0.3-4.0.4 ice cream sandwich (API 15 level)
Terminate Adobe system's support for Flash player.
Anroid 4. 1(API 16)
Google announced Android 4. 1 (jelly bean) 20 12 at the Google I/O conference on June 27th. Candy Bean is based on Linux kernel 3.0.3 1, which is a user interface with gradually updated functions and performance. It involves the improvement of performance. It uses touch prediction, triple buffering, extended VSYNC timing and fixed frame rate of 60 fps to create a smooth "smooth interface" user interface. 20 12 On July 9th, jelly bean released Android 4. 1, and the Nexus 7 tablet was the first device to run jelly bean.
Android4.2 jelly bean (API 17)
Google announced jelly bean 4.2 on 20 12129 October, but the event was cancelled because of Hurricane Sandy. Instead of rescheduling the live events, Google announced a new version, "jelly bean with a new taste". Nexus4 running Android4.2 LG and Nexus 10 of Samsung were released on 20121613.
The Lyme School of Android5.0 is expected to be released in June 20 13.