Android is one of the most widely used operating systems in the world these days. There are many software and apps that are developed on Android being released every day in various parts of the world. In 2021, having good knowledge about Android and android development is very essential. Heer in this article is the details that the interested candidates need to know about Android development. Given below are the Android development fundamentals that the Brgiers need to understand.
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Have Knowledge About the Language
One of the most important skill that the Android developers need to have is a good understanding regarding the programming languages. The two important languages that are used for Android development are Java and XML. So itis very important that the candidates to have an idea reading the language and this is one of the most important prerequesite that is required for beginning your career as an Android developer. The given below are some of the most important details regarding the Java programing language that the candidates need to posses.
- Packages
- Objects & classes
- Inheritance & interfaces
- Strings & numbers, generics,
- Collections
- Concurrency
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Knowledge about the Tools and Environment
It is a must for the Android developers to have knowledge regarding the automation tools and the wnivorment for the development before they start your work. Android developers can use the tools like Android studio IDE and Ecllispse for the practise of Android development. More details regarding these suitable mediums and the tools can be understood through GitHub.
Knowledge regarding Fragmentations, Android Application, Threads, Loaders, and Tasks
This is one of the must have skills that the candidates need to have as they decide to have a career as an Android developer. The Android application that the developer develops will be much more maintenance when there are many features and it supports on more that one devices. So the developer must be informed enough to understand about the details. You also require appropriate fonts, assets, and layouts that will help in ensuring that the best possible experiences in the various screen characteristics are given. You should also consider the array of android supported sensors or UI facilities. If the developer want to deliver a great and smooth user interface, always ensure that the thread is never blocked. Therefore, the long operations (computations, I/O, network, etc.) should all be run asynchronously in the background (mainly on a different thread of execution). This is why it is important to learn the Java language concurrency facilities.
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Have an Idea about the Application Components
Application components areone of the most important part and building block of an application. Each of the components represents to the point by which the system can enter your app.
There is a total of five different types of app components each serving a distinct purpose with a distinct life cycle which defines how it is created and destroyed. The details regarding each of the application components are given below.
- Activities: This is a component that represents a single screen with a user interface (for instance, an email app may have one activity showing a list of new emails, another activity composing emails, and another one reading emails). Activities work together to form a cohesive user experience in the app. However, each one of them is independent.
- Services: This is a component that runs in the background to perform work for remote processes or long-running operations. It does not provide a user interface (for instance it might play music in the background while the user is in a different app).
- Content providers: This is the component that manages a shared set of app data. Through this component, the data that you store either in the file system, on the web, an SQLite database can be queried or even modified (as long as the content provider allows it). This component is also useful for writing and reading data that is not shared and is private to your app.
- Broadcast receivers: This is the component that responds to system-wide broadcast announcements. Most of the broadcast receivers originate from the system, and although they do not display a user interface, they can create a status bar notification that alerts the user when a broadcast event occurs. Generally, it is a gateway to the other components and it only does minimal work.
- Activating components: A synchronous message referred to as intent activates 3 of the 4 components (i.e. services, activities, and broadcast receivers). Intents also bind individual components to one another at runtime whether the component belongs to your app or not.
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Understanding and using the right tools
One another important fundamental skill that the Android developers ned to have is the skill to select the right tools and knowing when to use them and how. Android has some unique parameters that you should consider when writing an Android app. Some of them include:
- Performance and responsiveness: You should always respond to user input within five seconds otherwise the operating system will ANR you. (ANR-application not responding – the only option that you will have is to force close your app.)
- Lags of more than 100ms will be noticed by the users: As mentioned above, the UI thread should never be blocked because it is only one.
- Limited resources: Wake-locks (the mechanism that forces the device to do a certain thing despite the recommendation to put the device to sleep by the battery manager) should be used sparingly. Do not unnecessarily poll hardware (e.g. GPS or accelerometer) because it will quickly run down the battery.
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