Android Versions

Android has gone through quite a numbers of updates since its first release . show the various of Android and their codenames.

In 2019, Google released Android 10.0;the Following are key changes in Android 10.0:

Split-screen multi-window mode
Redesigned notification shade
Refined "Doze" feature
Switch from JRE(Java Runtime Environment) to Open JDK

One important thing to keep in mind as you are looking Android versions is that each version has its own features and APIs (application programming interfaces), if your application is written for the newest version of Android, and its uses an API that was not present in an older version of Android, then only devices running that newer version of Android will be able to use your application.

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Creating Android Virtual Devices (AVDs)

The next step is to create an Android Virtual Device (AVD) you can use for testing your Android application. An AVD is an emulator instance that enables you to model an actual device. Each AVD consists of a hardware profile ; a mapping to a system image ; and emulated storage,such as a secure digital (SD) card.One important thing to remember about emulators is that they are not perfect. There are some applications , such as games (which are GPU heavy ) or application that use sensors such as the GPS or accelerometer. Theses types of application cannot be simulated with the same speed or consistency within an emulator as they can when running on an actual device. However , the emulator is good for doing some generalized testing of your applications. You can create as many AVDs as you want to test your applications with different configurations. This testing is important to confirm the behavior of you application when it is run on different devices with varying capabilities. Use ...

Debugging Your Application

After you have built an application , you need to be able to debug it and see what is going on inside your code . One of the handiest ways to be able to see inside your code it through the use of break points. Breakpoints allow you to pause the execution of your code at specific location and see what is going on (or what is going wrong). Let's take a look at how to use breakpoints in Android Studio. Setting Breakpoints Breakpoints are mechanism by which you can tell Android Studio to temporarily pause execution of your code , which allows you to examine the condition of your application . This means that you can check on the values of variables in your application while you are debugging it. Also , you can check whether certain lines of code are being executed as expected - or at all. To tell Android Studio that you want to examine a specific line of code during debugging , you must set breakpoint at the line. Click the margin of the editor tab next to line of code you want...

What is Android

Android is a moblie operating System that is based on a modified version of Linux. It was originally developed by a startup of the same name , Android , Inc. In 2005 , as part of its strategy to enter the moblie space , Google purchased Android , Inc. and took over its development work (as well as its development team). Google wanted the Android OS to be open and free , so most of the Android code was released under the open source Apache License. That means anyone who wants to use Android can do so by downloading the full Android source code. Moreover, vendors ( typically hardware manufacturers ) can add their own proprietary extensions to Android and customize Android to differentiate their products from others . This development model makes Android very attractive to vendors, especially those companies affected by the phenomenon of Apple's iPhone,which was a hugely successful product that revolutionized the smartphone industry. When the iPhone was launched , many smartphone m...

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