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Thursday, July 2, 2020

What is the Android SDK and How to Start Using it

Android SDK is a software development kit developed by Google for the Android platform. The Android SDK allows you to create Android apps, and you don't need to be an expert to use it. In this tutorial, I'll explain what the Android SDK is and how to get started with it.

Android SDK comes bundled with Android Studio, Google's official integrated development environment (IDE) for the Android operating system. You can learn about Android Studio and the Android App Development Kit another of my articles.

Android

Understanding the Android App Development Kit

Esther Vaati

In this post, we'll look at:

What is the Android SDK?
How to install the Android SDK?
What is the Android SDK Manager?
What are the components of the Android SDK?

What is the Android SDK?

The Android SDK is a collection of software development tools and libraries required to develop Android applications. Every time Google releases a new version of Android or an update, a corresponding SDK is also released which developers must download and install. It is worth noting that you can also download and use the Android SDK independently of Android Studio, but typically you'll be working through Android Studio for any Android development.

The Android SDK comprises all the tools necessary to code programs from scratch and even test them. These tools provide a smooth flow of the development process from developing and debugging, through to packaging.

The Android SDK is compatible with Windows, macOS, and Linux, so you can develop on any of those platforms.

How to Install Android the SDK?

The Android SDK is optimized for Android Studio, and hence to effectively reap its benefits, you will need to install Android Studio. Having the Android SDK managed from within Android Studio is easier since support for languages like Java, Kotlin, and C++ is handled automatically. Not only that, but updates to the Android SDK are handled automatically by Android Studio.

To install the Android SDK from within Android Studio, first start Android Studio.

From the Android Studio start page, select Configure > SDK Manager.

If you already have Android Studio open, the SDK Manager icon is found on the top right corner, as shown below.

Install the required Android SDK platform packages and developer tools. A good start is to install:

Android SDK Build-Tools
Android Emulator
Android SDK Platform-Tools
Android SDK Tools
Documentation for Android SDK

Click Apply, and Android Studio will install the selected tools and packages.

What is the SDK Manager?

The Android SDK is composed of modular packages that you can download, install, and update separately using the Android SDK Manager. The SDK Manager helps to update new SDK releases and updates whenever a new Android platform is released. The SDK manager can be found in the top right corner of the Android Studio screen, as shown below.

All that is required to follow the instructions provided, and the updates will be immediately downloaded to your environment.

What are the Components of the Android SDK?

The Android SDK consists of an emulator, development tools, sample projects with source code, and the required libraries to build Android applications. Let's look at the key components one at a time.

Android SDK Tools

Android SDK Tools is a component of the Android SDK. It includes a complete set of development and debugging tools for Android, and is included with Android Studio. The SDK Tools also consist of testing tools and other utilities required to develop an app.

SDK Build Tools

Build tools are required for building components for building the actual binaries for your Android app. Always ensure your build tools component is up to date by downloading the latest version in the Android SDK Manager.

SDK Platform-Tools

Android Platform-Tools are used to support the features for the current Android platform and are necessary for Android app development. These tools interface with the Android platform on the device you use for testing. They include:

Android Debug Bridge (adb): This is a handy command-line tool that lets you communicate with a device. The adb command allows you to perform device actions, such as installing and debugging apps. It also provides access to a Unix shell that you can use to run a variety of commands on a device.
fastboot: This lets you flash a device with a new system image.
systrace: This tool helps collect and inspect timing information across all processes running on your device at the system level. It's crucial for debugging app performance.

SDK Platform-Tools are backward compatible, so you need only one version of the SDK Platform-Tools.

SDK Platform

For each version of Android, there's one SDK Platform available. These are numbered according to the Android version (eg. Android 7 Nougat) and an API version (eg. API Level 24). Before you build an Android app, you must specify an SDK Platform as your build target. Newer SDK Platform versions have more features for developers, but older devices may not be compatible with the newer platform versions.

Google APIs

Goggle provides a number of exclusive Google APIs to make developing your app easier. They also offer a system image for the emulator so you can test your app using the Google APIs.

Android Emulator

The Android Emulator is a QEMU-based device-emulation tool that simulates Android devices on your computer, allowing developers to test applications on different devices and Android API levels without needing to have physical devices for each. The emulator comes with configurations for various Android phones, tablets, Wear OS, and Android TV devices.

The Android emulator provides almost all of the capabilities of a real Android device. You can perform the following activities:

simulate phone calls and text messages
simulate different network speeds
specify the location of the device
simulate hardware sensors such as rotation
access Google Play Store and much more

Often it is faster and easier to test your app with an emulator instead of using a physical device.

Conclusion

In this post, we looked at some of the basics of the Android SDK. The Android SDK is the only way to develop for Android devices. Fortunately, it contains extensive documentation, tutorials, samples, best practice guidance, and an array of tools for many different development tasks.

Premium Android App Templates from CodeCanyon

Android Studio comes with some default templates to help start an app, but these are very basic and provide minimal, generic functionality.

CodeCanyon is an online marketplace that has hundreds of additional templates, which are way more feature rich and domain-specific too. You can save days, even months, of effort by using one of them.

CodeCanyon mobile Android app template bestsellers

An Android app template is a great way to jump start your app project, or to learn some new skills by exploring the source code to a professionally-made app.

Take a look at some of our roundups of the best Android app templates:

by Esther Vaati via Envato Tuts+ Code

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Learn Regex: A Beginner’s Guide

In this guide, you’ll learn regex, or regular expression syntax. By the end, you’ll be able to apply regex solutions in most scenarios that call for it in your web development work.

Regular expressions have many uses cases, which include:

form input validation
web scraping
search and replace
filtering for information in massive text files such as logs

Regular expressions, or regex as they’re commonly called, look complicated and intimidating for new users. Take a look at this example:

/^[a-zA-Z0-9.!#$%&’*+/=?^_`{|}~-]+@[a-zA-Z0-9-]+(?:\.[a-zA-Z0-9-]+)*$/

It just look like garbled text. But don’t despair, there’s method behind this madness.

xkcd.com/208

Credit: xkcd

I’ll show you how to master regular expressions in no time. First, let’s clarify the terminology used in this guide:

pattern: regular expression pattern
string: test string used to match the pattern
digit: 0-9
letter: a-z, A-Z
symbol: !$%^&*()_+|~-=`{}[]:”;'<>?,./
space: single white space, tab
character: refers to a letter, digit or symbol

Basics

To learn regex quickly with this guide, visit Regex101, where you can build regex patterns and test them against strings (text) that you supply.

When you open the site, you’ll need to select the JavaScript flavor, as that’s what we’ll be using for this guide. (Regex syntax is mostly the same for all languages, but there are some minor differences.)

Next, you need to disable the global and multi line flags in Regex101. We’ll cover them in the next section. For now, we’ll look at the simplest form of regular expression we can build. Input the following:

Continue reading Learn Regex: A Beginner’s Guide on SitePoint.

by Michael Wanyoike via SitePoint

Website Inspiration: KreativePro Masterclass

Now this is a beautifully designed Landing Page for an online course, wow! Each page element shines and what a lovely touch bringing the course certificate to life as you scroll. One can only assume the quality of the course will be top-draw based on their Landing Page design. Also great to see this built using Webflow!

Full Review

by Rob Hope @robhope via One Page Love

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[ This is a content summary only. Visit our website https://ift.tt/1b4YgHQ for full links, other content, and more! ]

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[ This is a content summary only. Visit our website https://ift.tt/1b4YgHQ for full links, other content, and more! ]

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