Article directory
1. Android development environment construction
1. Introduction to Android:
Android (Android) is a free and open source operating system based on the Linux kernel (excluding GNU components). It is mainly used in mobile devices, such as smartphones and tablets, and is led and developed by Google and the Open Handset Alliance . The Android operating system was originally developed by Andy Rubin and mainly supports mobile phones.
2. Android development history:
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In August 2005, it was acquired and injected by Google.
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In November 2007, Google and 84 hardware manufacturers, software developers and telecom operators formed the Open Handset Alliance to jointly develop and improve the Android system, and released the source code of Android.
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In October 2008, the first Android smartphone was released, manufactured by HTC. Android has gradually expanded to tablet computers and other fields, such as TVs, digital cameras, game consoles, smart watches, large car screens, smart homes, etc., and has gradually become an indispensable system software in people's daily life.
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In the first quarter of 2011, Android's global market share surpassed that of Symbian for the first time, ranking first in the world.
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In the fourth quarter of 2013, the global market share of Android platform mobile phones has reached 78.1%. On September 24, 2013, the operating system Android developed by Google ushered in its 5th birthday, and the number of devices using this system in the world has reached 1 billion.
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In 2019, Google officially announced that there are 2.5 billion active Android devices worldwide, not including most Chinese devices.
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Android releases a major version almost every year, and the technology updates and iterations are very fast. The release time of several major versions of Android is shown below.
| Android version number | Corresponding API | release time |
|---|---|---|
| Android 13 | 33 | February 2022 |
| Android 12 | 31 | October 2021 |
| Android 11 | 30 | September 2020 |
| Android 10 | 29 | August 2019 |
| Android 9 | 28 | August 2018 |
| Android 8 | 26/27 | August 2017 |
| Android 7 | 24/25 | August 2016 |
| Android 6 | 23 | September 2015 |
| Android 5 | 21/22 | June 2014 |
| Android 4.4 | 19/20 | September 2013 |
2. Android Studio development environment
Official website download link: https://developer.android.google.cn/studio/index.html
The computer memory should be more than 8GB. My broken computer is already stuck.
CPU1.5GHZ or above, C disk free space above 10GB.
Installation, the same old way, click the next step.
Once done, open Android Studio and that's it.
3. The first Android program
Select the new project in Android Studio, select Empty Activity
SDK environment select Android 9.0
Click Finish, then choose to create a virtual Android virtual machine, select Google's pix2,
Select the Android 11 system, and click Finish to generate the Android virtual machine.
Then there is the following interface, click the green arrow in the upper right corner, and you can run the first program!
operation result:
problems
1. SDK not found
Click the SDK Manager in the upper right corner of Android Studio
to select the version you want to download and download it.
2. The Android virtual machine cannot be found
Select the device on the main interface to run.
