*Official Android Forum*

Android is a free and open source operating system based on Linux, mainly used in portable devices, such as smartphones and tablets. There is currently no unified Chinese name, and many people in mainland China use "Android" or "Anzhi". The Android operating system was originally developed by Andy Rubin and mainly supports mobile phones. In 2005, it was acquired and invested by Google, and the Open Handset Alliance was established to develop and improve it. Later, it gradually expanded to tablet computers and other fields. The first Android smartphone was released in October 2008. In the first quarter of 2011, Android's global market share surpassed Symbian for the first time, ranking first in the world. Data from November 2012 showed that Android accounted for 76% of the global smartphone operating system market, with a market share of 90% in China.Game name: Android, Android
Foreign name: Android
Developer: Google, Open Handheld Alliance
Publisher: Google
Release time: September 23, 2008
Programming language: C/C++ (bottom layer)
Java, etc. (application layer) System family: Unix-like, Linux
Source code mode: Free and open source software
Kernel type: Macro kernel (Linux kernel)
Software license: Apache License,
GPL and other system introduction
The original meaning of the word Android refers to "robot", and it is also the name of the open source mobile operating system based on the Linux platform announced by Google on November 5, 2007. The platform consists of an operating system, middleware, user interface and application software.
The word Android first appeared in the science fiction novel "Future Eve" (L'èvefuture) published by French writer Auguste Villiers de l'Isle-Adam in 1886. He named the human-looking machine Android.
Android's Logo is designed by Ascender. The text uses a font called "Droid" specially produced by Ascender. Android is a green robot, and green is also the symbol of Android. The color is drawn using PMS 376C and hexadecimal #A4C639 in RGB, which is the brand symbol of the Android operating system. Sometimes, they also use plain text logos.
In July 2012, the American technology blog website BusinessInsider selected the ten most important electronic products of the 21st century, and the Android operating system and iPhone were on the list. In October 2003, Andy Rubin and others founded the Android company and formed the Android team.
On August 17, 2005, Google quietly acquired Android and its team, a high-tech company that had been established for only 22 months. Andy Rubin became Google's vice president of engineering and continued to be responsible for the Android project.
On November 5, 2007, Google officially demonstrated the operating system called Android to the outside world, and on this day Google announced the establishment of a global alliance organization, which is composed of 34 mobile phone manufacturers, software developers, telecom operators and chip manufacturers, and formed the Open Handset Alliance (Open Handset Alliance) with 84 hardware manufacturers, software developers and telecom operators. Alliance) to jointly develop and improve the Android system. This alliance will support the mobile operating system and application software released by Google. Google has released the source code of Android under the authorization of Apache free open source license.In 2008, at the Google I/O conference, Google proposed the Android HAL architecture diagram. On August 18 of the same year, Android was approved by the US Federal Communications Commission (FCC). In September 2008, Google officially released the Android 1.0 system, which is also the earliest version of the Android system.
In April 2009, Google officially launched the Android 1.5 mobile phone. Starting from Android 1.5, Google began to name the Android version after desserts. Android 1.5 was named Cupcake. The system has been greatly improved compared to Android 1.0.
In September 2009, Google released the official version of Android 1.6, and launched the HTC Hero (G3), a mobile phone equipped with the official version of Android 1.6. With its excellent appearance design and new Android 1.6 operating system, HTC Hero (G3) became the most popular mobile phone in the world at that time. Android 1.6 also has an interesting dessert name, it's called Donut.
In February 2010, Linux kernel developer Greg Kroah-Hartman removed the Android driver from the Linux kernel "staging tree". From then on, the mainstream of Android and Linux development will part ways. In May of the same year, Google officially released the Android 2.2 operating system. Google named the Android 2.2 operating system Froyo, which translates to frozen yogurt.
In October 2010, Google announced that the Android system had reached its first milestone, that is, the number of Android applications that had obtained official digital certification in the electronic market had reached 100,000. The applications of the Android system were growing very rapidly. In December 2010, Google officially released the Android 2.3 operating system Gingerbread. In January 2011, Google said that the number of new users of Android devices per day reached 300,000. By July 2011, this number had grown to 550,000, and the total number of users of Android system devices reached 135 million. The Android system has become the system with the highest share in the field of smartphones.
On August 2, 2011, Android mobile phones accounted for 48% of the global smartphone market and dominated the market in the Asia-Pacific region, ending the dominance of Symbian (Symbian
system) and ranking first in the world.
In September 2011, the number of Android system applications has reached 480,000, and in the smartphone market, the Android system's share has reached 43%. It continues to be the number one mobile operating system. On the 19th of this month, Google will release a new Android 4.0 operating system, which is named Ice Cream Sandwich by Google.
As of January 6, 2012, Google Android Market has 100,000 developers launching more than 400,000 active applications, most of which are free. The Android Market app store catalog surpassed the 400,000 benchmark in the first weekend of the new year, just 4 months after surpassing 300,000 apps. Earlier in 2011, it took four months for the Android Market to grow from 200,000 to 300,000 apps. Release version
Before the official release, Android initially had two internal test versions, and they were named after famous robot names. They are: Astro Boy (AndroidBeta) and Clockwork Robot (Android 1.0). Later, due to copyright issues, Google changed its naming rules to use desserts as the code names for their system versions. Dessert nomenclature started when Android 1.5 was released. The sizes of the desserts represented as each version became larger and larger, and then in alphabetical order of 26: Cupcakes (Android 1.5), Donuts (Android 1.6), Waffles (Android 2.0/2.1), Frozen Yogurt (Android 2.2), Gingerbread (Android 2.3), Honeycomb (Android 3.0), Ice Cream Sandwich (Android 4.0), Jelly Bean (Android 4.1 and Android) 4.2).
Android 1.1: The first version of Android released in September 2008.
Android 1.5Cupcake: Released on April 30, 2009.
The main updates are as follows:
shoot/play videos and support uploading to Youtube; support stereo Bluetooth headsets and improve automatic pairing performance; the latest browser using WebKit technology supports copy/paste and page search; greatly improved GPS performance; provides on-screen virtual keyboard; main A music player and photo frame widgets are added to the screen; applications automatically rotate with the phone; the user interfaces of text messages, Gmail, calendar, and browsers are greatly improved, such as Gmail can delete emails in batches; the camera startup speed is accelerated, and pictures taken can be directly uploaded to Picasa; photos of incoming calls are displayed. Android 1.6Donut (Donut): Released on September 15, 2009.
The main updates are as follows:
Redesigned Android Market gestures; support CDMA network; text-to-speech system (Text-to-Speech); quick search box; new camera interface; view application battery consumption; support virtual private network (VPN); support more screen resolutions; support OpenCore2 media engine; new usability plug-in for people with visual or hearing difficulties.
Android 2.0/2.0.1/2.1 Eclair (muffin): Released on October 26, 2009.
The main updates are as follows:
Optimize hardware speed; "Car Home" program;Support for more screen resolutions
; improved user interface; new browser user interface and support for HTML5; new contact list; better white/black background ratio; improved Google Maps 3.1.2; support for Microsoft Exchange; support for built-in camera flash; support for digital zoom; improved virtual keyboard; support for Bluetooth 2.1; support for dynamic desktop design.
Android 2.2/2.2.1 Froyo (frozen yogurt): Released on May 20, 2010. The main updates are as follows:
Significant improvement in overall performance; 3G
network sharing function; Flash support; App2sd function; new software store; development of more Web application API interfaces.
Android 2.3.xGingerbread (Gingerbread): Released on December 7, 2010.
The main updates are as follows:
Added new garbage collection and optimization processing events; native code can directly access input and sensor events, EGL/OpenGLES, OpenSL ES; new management window and life cycle framework; supports VP8 and WebM video formats, provides AAC and AMR wideband encoding, and provides new audio effects; supports front camera, SIP/VOIP and NFC (near field communication); simplified interface, speed improvement; faster and more intuitive text input; one-click text selection and copy/paste; improved power management system; new application management method.Android 3.0 Honeycomb: Released on February 2, 2011.
The main updates are as follows:
Optimized for tablets; newly designed UI to enhance web browsing functions; n-app purchases function.
Android 3.1Honeycomb: Released on May 11, 2011.
The main updates of the version are as follows:
Optimized Gmail email; fully supports Google Maps; merges the Android mobile phone system and tablet system again to facilitate developers; the task manager is scrollable and supports USB input devices (keyboard, mouse, etc.); supports Google TV. It can support XBOX 360 wireless controllers; changes in widget support make it easier to customize the screen widget plug-in.
Android 3.2Honeycomb (Honeycomb): Released on July 13, 2011.
The version update is as follows:
Supports 7-inch devices; introduces application display scaling function.
Android 4.0 Ice CreamSandwich (ice cream sandwich): Released in Hong Kong on October 19, 2011. The main updates of the version are as follows:
New UI; new ChromeLite browser, with offline reading, 16 tabs, incognito browsing mode, etc.; screenshot function; more powerful picture editing function; the built-in photo application is comparable to Instagram
, you can add filters, add photo frames, take 360-degree panoramic shots, and photos can be sorted according to location;Gmail adds gestures and offline search functions, and the UI is more powerful; the new function People: takes contact photos as the core, the interface focuses on sliding rather than clicking, and integrates communication tools such as Twitter, Linkedin, and Google+. It is expected to support users to customize third-party services; a new traffic management tool can be used to specifically view the traffic generated by each application, limit the traffic usage, and automatically disconnect from the network after reaching the set standards.
Android 4.1 Jelly Bean (Jelly Bean): June 28, 2012
New features:
Faster, smoother, and more responsive; special effects animation frame rate increased to 60fps, triple buffering; enhanced notification bar; new search; search will bring a new UI, intelligent voice search and GoogleNow three new features; desktop plug-in automatic resizing; enhanced accessibility; language and input method expansion; new input types and functions; new connection types.
Android 4.2 Jelly Bean: October 30, 2012
Android 4.2 retains the name "Jelly Bean" to reflect the similarity of the latest operating system to Android 4.1, but Android 4.2 introduces some major new features, as follows:
Photo Sphere panoramic camera function; keyboard gesture input function; improved lock screen function, including support for desktop widgets and direct opening of the camera function in the lock screen state; expandable<