Android is a mobile operating system based on a modified version of the Linux kernel and other open source software, designed primarily for touchscreen mobile devices such as smartphones and tablets. Android is developed by a consortium of developers known as the Open Handset Alliance, with the main contributor and commercial marketer being Google.
Initially developed by Android Inc., which Google bought in 2005, Android was unveiled in 2007, with the first commercial Android device launched in September 2008. The current stable version is Android 10, released on September 3, 2019.
Android has been the best-selling OS worldwide on smartphones since 2011 and on tablets since 2013. As of May 2017, it has over two billion monthly active users, the largest installed base of any operating system, and as of January 2020, the Google Play Store features over 2.9 million apps.

Android Studio

Android Studio is the official integrated development environment (IDE) for Google’s Android operating system, built on JetBrains’ IntelliJ IDEA software and designed specifically for Android development.It is available for download on Windows, macOS and Linux based operating systems.It is a replacement for the Eclipse Android Development Tools (ADT) as the primary IDE for native Android application development.

On 2019, Kotlin replaced Java as Google’s preferred language for Android app development.Java is still supported, as is C++.

Bios

an acronym for Basic Input/Output System and also known as the System BIOS, ROM BIOS or PC BIOS) is firmware used to perform hardware initialization during the booting process (power-on startup), and to provide runtime services for operating systems and programs.

The BIOS (Basic Input Output System) controls communication between system devices such as the disk drive, display, and keyboard. It also stores configuration information for peripherals types, startup sequence, system and extended memory amounts, and more. Each BIOS version is customized based on the computer model line’s hardware configuration and includes a built-in setup utility to access and change certain computer settings.

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In order to use Android Virtual Device (to run application in android studio) you need to enable the Intel HAXM in the BIOS

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Set Intel HAXM in the BIOS – video!

Anonymous class in Java

In Java, a class can contain another class known as nested class. It’s possible to create a nested class without giving any name. A nested class that doesn’t have any name is known as an anonymous class. An anonymous class must be defined inside another class. Hence, it is also known as an anonymous inner class

More topics covered:
– Installing Android Studio
– Setting virtualization in BIOS (HAXM)
– Creating our first hello world application
– Android Virtual Device (AVD)
– Android application structure
– Resources ( R )
– Manifest file
– Clicking a button event

Links:

• Android – nice ppts
• Class code: Anonymous class in Java
• Class code: Button click – setOnClickListener
• Another HAXM article
• Lesson Summary Video!