There are many ways to create applications for Android devices, but the recommended method for most developers is to write their own applications using Java and Android SDK. Java for Android applications is very different from other types of Java applications.
If you have experience with Java (or similar language), you should probably feel comfortable diving directly into the code and learning how to use the Android SDK to run your app. But if you are new to programming or semantic languages, you should know how to complete basic programming tasks before you can learn the syntax of Java language and how to use Android SDK.
Java programming language
Programming languages, like regular languages, have different ways of transmitting information to a computer, depending on how you want it to function. Programming languages allow us to teach a computer step-by-step how to handle data, collect user entries, and display objects on a screen.
At the microscopic level, a computer’s processor sends electrical signals that control its operation. High-level programming languages like Java mean that we can write these algorithms in an abstract way using words and symbols, and the computer will be careful to translate those algorithms so that we can understand up to the electrical impulses that the processor can understand. We can not get ahead of ourselves, but Java is a standard type, semantic language. Let’s break this down:
“Statically typical” – basic programming actually works on data. Data elements are stored as variables, which are basically containers that hold data. Standard languages like Java need to declare what kind of data each variable (or container) holds. For example, if a variable is to have a number, we must say it, and nothing else can be put as a character in it. Statically typed also means that all variables will be checked be ing be for the program even run, and we will be proven with an error if to declare a type of data or declare the bad one.
“Object-oriented” – object-oriented language is a language built around the concept of objects. In the physical world, look around the room and consider every object as an object. For example, I now have a file on my desk. As a product, its name is “cup” and it has properties about it like its color and how much liquid it holds. Semantic languages allow us to define objects as mugs and access their properties in our code. We can send messages to stuff, so in my file, I need to know “Is it empty?” We can then create and handle all kinds of items to do different things in our application. For example, you can use a camera object to take a picture. The camera object represents the body camera on an Android phone, but in a way that we can communicate with the code.
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