android-developer-skill

Android Developer Skill

"Android Development" is the method of developing an application that any operating system can use by using Android development kits or the software development kit(SDK) in android studio. " A critical aspect that is a fundamental feature of one of the Android app environment's main features is that Android applications are traditionally written using Java. Java programming language. However, it is possible to write them in a new programming language called Kotlin offered by Google. Android software can be developed using Kotlin, Java, and C++ languages using the Android software development kit (SDK), and the use of other languages is feasible.

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Android Development

Android, the open-source platform for tablets and smartphones, creates excitement across the mobile world. At present, it is estimated that the AndroidAndroid platform is used by 4.0 billion customers (in 2022), that's greater than another operating system for mobile phones. It is accessible on a wide range of mobile devices and tablets, and wearables with Android Wear; the Android Wear operating system. Nowadays, every company or brand requires an innovative Android app to expand its reach in terms of innovation, reach, and creativity.

Android Development for Beginners - Full Course, Source: Youtube, freeCodeCamp.org 

Specific Android versions were found as time passed, with the help of the development of new technologies or with some tweaks. These are the versions of that.

  • Android versions 1.0 & 1.1
  • Android version 1.5: Cupcake
  • Android version 1.6: Donut
  • Android Versions 2.0 through 2.1: Eclair
  • Android version 2.2: Froyo
  • Android version 2.3: Gingerbread
  • Android 3.0 to 3.2: Honeycomb
  • Android version 4.0: Ice Cream Sandwich
  • Android version 4.1 up to 4.3: Jelly Bean
  • Android version 4.4: KitKat
  • Android version 5.0 as well as 5.1: Lollipop
  • Android version 6.0: Marshmallow
  • Android Version 8.0 or 8.1: Oreo
  • Android version 9: Pie
  • Android version 10
  • Android version 11
  • Android version 12
  • Android version 13(latest version)

Android Developer

Android Developer provides Android application development services in India and around the world. Employers usually require an undergraduate degree in software development or a related field; however, they generally do not need any experience working to become an Android Developer. Making Android apps is booming; therefore, the demand for android developers is highly significant. 

Android Developer Responsibilities

  • An Android developer is responsible for various tasks that range from creating the app to fixing it after it has been deployed.
  • Make use of Github, which allows developers to collaborate quickly. Developers can download a new version of the software, modify it, and upload the latest version.
  • Discover and comprehend what databases(MySQL, Mongo) work.
  • Troubleshoot and Repair Bugs in new and existing applications.

Android foundations

The foundational component in Android development is programming languages. The two most popular languages used to develop Android applications comprise Kotlin and Java. Java is the language used to program that is the basis of every aspect of Android development. Kotlin is an alternative officially recognized Android language. It's similar to Java. However, it's much simpler to learn than Java. It is possible to use either Kotlin or Java simultaneously to build applications. It is essential to know the fundamental concepts of either of these languages, such as the fundamentals and syntaxes, collection frameworks, multithreading and concurrency, and generics and functional programming.

System Foundations - Android OS (Quick Version), Source: Youtube, The Expat Professor

To create designs (user interface) to design user interfaces (layouts) in Android, We use XML. Similar to HTML, XML is also a markup language and is the name of eXtensible Markup Language. After creating XML Layouts, they are connected to Kotlin/Java files in which the business logic is constructed.

Gradle, along with Android plugins, operates in isolation from Android Studio. This means that you can create Android apps using Android Studio; the command line on your computer or other machines that do not have Android Studio is not installed (such as continuous integration servers).

Android Interactivity

The interaction of users with Android apps must be considered the supreme importance. Responding to events with call-backs, using appropriate gestures, such as dropping and drag, offering the right keyboard for input, and making sure that you pan - and zoom functions in the correct location plays an essential role in providing users with a seamless experience. These are nitty-gritty but are highly beneficial in increasing user interaction. In the end, the user interaction is carried out through an Android component called Activity.

An Activity is a singular and focused thing that a user can perform. It is an essential element of an Android application. Most Activities communicate with the user, and the Activity class is in charge of making a window to place an interface for users.

Android Tutorial 2019 - Android InterActivity Communication, Source: Youtube, CodeKul

The Android device has a variety of screen layouts. Screen orientation is among the options. It is possible to choose either landscape or portrait. Every Activity can be in either landscape or portrait mode. When the screen is rotated, the Activity is destroyed and rebuilt in a new orientation. It is essential to ensure that the stability of your training must be ensured even when the screen orientation alters.

The activities discussed above should be handled with care by an Android developer.

Android UI

A program is not complete when it is not equipped with an up-to-date user interface. An Android application's user interface (UI) is designed by a hierarchical arrangement of widgets and layouts. The app may include helpful features, but if it is unable to be able to keep up with current UI guidelines, it's bound to be a failure.

Utilizing RecyclerView to build grids and lists, employing ConstraintLayout for creating complicated layouts, incorporating animations to improve user experience. Using appropriate menus, adhering to the guidelines for the design of Material, and using vector-drawable as opposed to raster images are a few of the most fundamental guidelines that every developer should follow in developing their applications.

Android - UI Layout, Source: Youtube, Tutorials Point (India) Ltd. 

When designing layouts, one should not overlook the different screen types of devices. The same application must look differently for other gadgets. For instance, the screen on a tablet must display dual-pane layouts to make the most of the large screen. On a smartphone, it is best to use a single-pane. This can be accomplished through the use of Fragments. This can be accomplished by creating custom components for your Views.

Implementing Navigation

Navigation refers to the interaction that allows users to move between, within, and back out of your app's various content pieces. A variety of UI elements enable you to use effective UI navigation.

The most basic of them will be the App bar, often referred to as Toolbar. In your Toolbar, you can place an open-ended menu or menu icon and even an icon for a navigation drawer. This navigation drawer icon helps you move the drawer, which is an additional aspect to make navigation effective. The navigation drawer permits users to add additional menu items that will allow you to switch fragments within your current Activity or perform various other relevant actions.

Android Fundamentals: Implementing Effective Navigation, Source: Youtube, CodingWithMitch

Another navigation element is a BottomNavigationView that lets you change between various Fragments within the same Activity using tabs located below the display. If you're looking to utilize charges connected to the Toolbar and move between the different Fragments (different pages), ViewPager should be your preferred choice.

The intention of the user is the primary element of navigation. Users may want to open an entirely new activity, return to the last exercise, or transfer data with another application. If you know the target activity, use Explicit Intent, or use Implicit Intent. You can always set your intentions.

In addition, Google Jetpack's Navigation component can help implement navigation, starting with simple button clicks and moving to more complex patterns, including app bars and an underlying navigation drawer.

Android Testing

Your app's users interact with it at various levels, such as pressing the Submit button to download data onto their devices. So, you must test a range of scenarios and interactions as you develop your application through running tests on your app consistently and ensuring the accuracy of your app, its functioning, and usability before deciding to publish it to the world. The most frequently used testing libraries include Expresso, Junit, Mockito, Robolectric, and UI Automator.

Resolving Databases

Data is a crucial component of your app and should not be overlooked. You might need to retrieve information via the internet, access data from your local database, save users' preferences, and handle file files.

How to troubleshoot database performance issues, Source: Youtube, GroupBy

Data is a crucial component of your app and should not be overlooked. You might need to retrieve information via the internet, access data from your local database, save users' preferences, and handle file files. To save a tiny amount of data, such as key-value pairs or types of objects, you can use Jetpack's DataStore that makes use of coroutines in Kotlin as well as Flow to keep information. To manage a large volume of data, Cloud services such as Firebase or Parse offer simple APIs to keep data in the cloud and allow it to be accessible to all devices.

Notifications

Notifications are among the most effective methods to increase engagement with users. A report is a text message that appears in the app's interface. It provides users with reminders, statements from others, or other relevant information within your application. Create the news, alter the layout, add actions, and combine multiple reports with Notification channels.

Android Security

Android includes security features that drastically reduce the impact and frequency of security concerns in applications. It is possible to protect the privacy of the user by granting permission.

The state of Android security | Session, Source: Youtube, Android Developers 

Securely share data by using signature-based permissions. Manage data security using external and internal storage and ContentProviders with extreme care. Android has limited the capabilities of WebView to a minimum level of functionality to prevent security concerns on the web like Cross-site scripting (JavaScript injection). Yet, you have to be careful and limit the frequency you ask for the user's password. Instead, opt for an authorization token that you can periodically refresh.

Conclusion

As the world shifts, immersing itself more and more into the mobile-based world, Android app developers can be sure to get a lot of attention for their products or services or offer immense value to businesses that require mobile app development skills. There are numerous reasons to decide to become an Android developer, for instance: the following:

  • You can display your creative and design abilities.
  • After having a good understanding of Android advancement, you could work as a freelancer.
  • A variety of tools for development are accessible on the internet, making it simple to create Android applications.
  • Developers can easily access the development kit and framework to stay up-to-date on the most recent information and techniques since it is a part of an open-source platform.

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