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in this submit, you are going to find out about C# programming for Android, as well as where it suits in within the imposing scheme of Android development.
if you’re interested in fitting an Android developer, you can breathe under the impression that you need to breathe trained one in bar nothing two languages: Java or Kotlin. These are both languages officially supported via Android Studio, and therefore both languages many courses and tutorials heart of attention on. Android construction is a lot greater bendy and varied than that, and there are an dreadful lot more how you can approach it. a lot of these involve C#.
examine: I need to enhance Android apps – which languages should silent I learn?
C# is the programming language you’ll utilize in case you elect to build a online game in cohesion for instance – which too occurs to breathe essentially the most generic and time-honored video game engine within the Play keep. In everyday, it is effective to breathe trained C# programming when you are in any respect interested in video game development.
make sure to additionally gain scholarship of C# programming if you wish to utilize Xamarin. Xamarin is a device that permits developers to build apps using visible Studio that may simply breathe ported to each iOS and Android, perfect for cross platform projects.
So, with that referred to, there's actually satisfactory motive to learn C# programming for Android. Let’s consume a hunt at what you deserve to know.a quick introduction – C# vs Java
C# is an object-oriented programming language that turned into developed via Microsoft round 2000, with the goal of being contemporary, elementary, and versatile. relish Java (developed by using solar Microsystem in 1990), it initially advanced from C++, ensuring that there are a lot of similarities between both. as an example, each utilize the selfsame “syntactic base,” which means that they easily utilize lots of the identical terminology and structure. There are a few minor ameliorations, but if you're celebrated with one language, then breathe sure to breathe able to breathe mindful lots of the different devoid of wanting to possess discovered it mainly. For novices notwithstanding, many will learn that it is a bit of easier to gain scholarship of C# programming.
As object-oriented-languages, each C# and Java will narrate objects via classes. this is a modular approach to programming, that enables snippets of code to breathe used again and again.
where C# differs from Java even though, is in its utilize of delegates, its system to adventure listening, digital vs ultimate houses, implicit casting, and more.
The first rate news: you in fact don’t deserve to know what most of this potential in the event you first start to learn C#. The leading takeaway is that the structure is barely a bit bit less difficult to breathe taught in C# and tends to require less typing. here is especially precise because that for those who learn Java for Android, you’ll additionally should become intimate with the numerous classes and APIs crucial to construct Android apps. thus, you may too breathe taught C# programming as a stepping stone to Java.whats up World! in C#
way of life on the earth of coding is that any time you study a new language, breathe sure you create a simple application to reveal “hi there World!” on the screen. This really ensures that you simply’re capable of salvage the essential tools up and working and to compile some thing simple. It’s relish studying “trying out, checking out, 1, 2, three” perquisite into a microphone!
during this case, we’re going to bow utilize of visible Studio to create a console app. So when you’ve long past forward and downloaded visual Studio (it’s free), click:
File > New > task
visual C# > home windows traditional computer > Console App (.net Framework)
here's how they build an app so as to evade within the home windows console.
With that performed, the bare bones structure of your assignment will appear typically window. You’ll breathe introduced with code that looks relish this:namespace ConsoleApp3 class software static void leading(string args)
Now without problems add two lines, relish so:namespace ConsoleApp3 sort software static void leading(string args) Console.WriteLine("hey World!"); Console.ReadKey();
here is going to jot down “howdy World!” to the monitor, and then hunt forward to a key press. as soon as the person touches any key, the application will further to an conclusion and will instantly exit.
be awake that both these lines conclusion with a semicolon. here's because any statement in C# must quit with a semicolon, which communicates to C# that the road is entire (it’s the identical in Java). The only exception is when the road is adopted immediately by using an open bracket, which we’ll elaborate in a moment.
Press the “birth” button at the accurate of the screen, and that may silent launch the app, permitting you to hunt this in follow.
classes are pieces of code that narrate objects, that are without problems items of information
So, what precisely is happening perquisite here?Getting began with C#: strategies and classes
To breathe trained C# programming for Android, you should consume note courses and strategies.
classes are pieces of code that narrate objects, which are without problems pieces of records. You don’t should agonize too much about this to birth with: simply comprehend that the web page of code you’re working with perquisite now is referred to as a “class” and for you to engage with different courses within your task. A undertaking can possess only one type, with your entire code working from there, or it may well possess varied.
within each category, you will even possess methods. These methods are snippets of code that you can argue with at any time from inside that classification – and infrequently from outdoor of it.
in this case, the class is called application. here's described remedy on the top through the line that reads: class software. And in case you open the “solution Explorer” window on the appropriate, you’ll breathe capable of finding application.cs. The identify of the category is bar nothing the time the selfsame as the filename.
We then utilize a curly bracket to hold bar nothing of the code that follows. Curly brackets inform us that every thing that follows belongs collectively. hence, except the bracket closes, bar nothing the following code is a fragment of program.
here's followed by means of their first components, profile by means of the following line:static void main(string args)
here's then adopted by using greater open brackets, which means that the subsequent bit of code is fragment of the “leading” system (which is silent inside the software category). And that’s where we’ve apportion their “good day World” message.
“Static void” practically tells us that this formula does something self-contained (instead of manipulating records for utilize through the broader program) and that it might probably’t breathe referenced through outside classes. The “string args” stuff allows us to flux counsel into the system to govern later. These are referred to as “parameters” and “arguments”. again, you don’t need to breathe anxious about any of that simply yet. simply know that “static void” followed by a breathe aware, brackets, and curly brackets, marks the delivery of a new components.
The next two lines are those they delivered: they salvage the console after which entry its commands to write to the monitor and wait for a key press.
ultimately, they shut bar nothing their brackets: first the formulation, then the class, after which the “namespace” which is the name of the undertaking the class belongs to (during this case “ConsoleApp3” – I possess made previous examine apps this manner).
puzzled? Don’t breathe anxious, it’s about to bow extra experience.the utilize of strategies
So methods are bundles of code with names. To reveal why they utilize strategies, it can breathe useful to create a brand new one and apportion it to toil as an example.
So, create a new components that lives in the application classification (so it must breathe inside those curly brackets, however outdoor the curly brackets belonging to “main”).
name this “NewMethod”, and then apportion both lines you simply wrote interior here. This should appear relish so:type software static void leading(string args) static void NewMethod() Console.WriteLine("whats up World!"); Console.ReadKey();
Now add a reference to NewMethod on your main formulation, relish so:static void main(string args) ar NewMethod();
here's going to then “name” the formula you simply created, almost directing the software in that path. Press genesis and too you’ll notice the identical factor happens as before. apart from now if you desired to, you could write “NewMethod();” as again and again as you wanted and hold repeating the text without having to apportion in writing a lot of code.
Over the direction of a massive software, being able to reference snippets of code relish this turns into extremely potent. this is one of the vital vital things to uphold in mind if you occur to are attempting to breathe trained C# programming for Android.
we are able to create as many strategies as they relish this vogue and that approach possess a really super and arranged piece of code. at the equal time, they will too reference methods which are “built in” to C# and any libraries they may use. “main” is one specimen of a “developed-in” method. this is the components that each one classes will delivery with, and that C# is intimate with it's going to execute first. in case you don’t apportion the leisure in here, then nothing will consume place!
The arguments that are included in the brackets during this case are therefore most effective needed as a result of it is the style that Microsoft designed the main system. They however had been attribute to travel away their brackets empty.the utilize of variables
Now it’s time to truly finish whatever thing a bit bit enjoyable in their code. certainly, let’s consume a glance at the course you would utilize variables to bow the application greater dynamic. here is one of the most distinguished issues to possess in mind if you are looking to breathe trained C# programming.
A variable is in reality a container for a chunk of facts. forged your intellect again to highschool math, and you may bethink seeing issues relish this:
10 + x = 13Find x
here, “x” is a variable, and of course the expense it represents is “three”.
here is additionally precisely how a variable works in programming. apart from perquisite here, a variable can characterize loads of several types of data: together with textual content.
To create a brand new variable, they first need to inform C# what class of statistics it goes to breathe used to include.
So interior your NewMethod() system, first you are going to create your variable, and then you'll apportion it a value. Then we’re going to add it to their “WriteLine” command:int number; quantity = 10; Console.WriteLine("hello World! " + number);
We’ve used a kindhearted of variable known as an “integer” which can too breathe any entire quantity. In C#, they consult with these the utilize of “int”. besides the fact that children, they could just possess effectively used a “go with the flow” as an instance, which is a “floating factor variable” and allows for us to utilize decimal places.
if you evade this code, it should now write “hey World! 10” to the display. and naturally, they could alter the expense of “number” at any time to breathe able to alter the message.
as a result of “number” is created within NewMethod(), they will’t access it from somewhere else in their code. but when they region it outside the entire methods, then it's going to become obtainable globally. To finish that, they deserve to bow certain that the variable is additionally static besides the fact that children:type application static int number = 10; static void main(string args) NewMethod(); static void NewMethod() Console.WriteLine("hello World! " + number); Console.ReadKey();
at last, there is an additional course they can pass this records round, and that might breathe to utilize it as an argument, thereby passing it into their formula. This could hunt relish so:static void main(string args) int number = 10; Console.WriteLine("hi there, what's your name?"); NewMethod(number); static void NewMethod(int number) Console.WriteLine("whats up World!" + quantity); Console.ReadKey(); }
here, we're defining their NewMethod system as desiring one argument, which should silent breathe an integer, and which will breathe mentioned in the system as “quantity”. They try this with the aid of with ease including that advice to the curly brackets. Then, once they convoke the components from anywhere else in the program, they should “circulate” that value within the brackets. you could create methods with numerous parameters, through which case you simply divorce the listed variables with commas.
There are diverse eventualities the plot using bar nothing these different thoughts to juggle records can breathe appropriate. first rate programming means finding the usurp one for the job!Passing arguments and the utilize of strings
are attempting running this subsequent piece of code and notice what occurs:classification application static void leading(string args) Console.WriteLine("hello there, what's your name?"); NewMethod(Console.ReadLine()); static void NewMethod(String UserName) Console.WriteLine("hi there " + UserName); Console.ReadKey();
be sure to locate that you are brought about to enter your identify, and that the Console then greats you by it. This basic piece of code includes a few effective instructions.
First, they notice an instance of the course to utilize a divorce classification of variable, called a String. A String is a progression of characters, which could breathe a name, or may breathe a entire story.
So, you might just as quite simply write UserName = “Adam”. however as a substitute, we’re getting the string from the console with the commentary: Console.ReadLine().
We may possess written:String user; user = Console.ReadLine(); NewMethod(consumer);
however to uphold their code as super as viable, we’ve skipped those steps and positioned the “ReadLine” without slow in the brackets.
We then lumber that string to their NewMethod, and they greet the person, using the formulation that you just’re already universal with.
A String is a progression of characters, which can breathe a name, or can breathe a complete story.
expectantly, you’re now starting to consume note a dinky bit about why C# is written the manner it's, and how that you can utilize issues relish variables and methods with a purpose to create some bendy and stalwart utility.
but there’s yet another crucial component you'll want to know in case you wish to breathe taught C# programming: movement control.learn C# lumber manage and construct primary quizzes!
one of the motives that they utilize variables when coding, is so that they will conveniently edit their programs in consequence. a different is so for you to salvage information from the person, or generate it randomly.
but possibly the most usurp motive to gain scholarship of C# variables, is in order that your courses can develop into dynamic: for you to react in a different course depending on how they're used.
To that conclusion, they need “stream manage”, or “conditional statements”. These are in fact just fancy approaches of asserting that we’re going to execute code in more than a method, depending on the expense of a variable.
And one of the most powerful how to finish that is with an “if” observation. in this instance, let’s greet their leading person in another course than the others with the aid of looking out for their username.static void NewMethod(String UserName) Console.WriteLine("howdy" + UserName); if (UserName.Equals("Adam")) Console.WriteLine("Welcome back sir"); Console.ReadKey();
“If” statements toil by testing the validity of a press release, with a purpose to travel inner brackets. during this case, we’re asking no matter if the string UserName is the selfsame because the string “Adam”. If that commentary within the brackets is precise – the two strings are the equal – then the code in the following curly brackets will execute. If it’s no longer, then those traces can breathe skipped.
Likewise, they are able to examine integers and floats, and they can examine to hunt if one is greater than the different, and so on. They may too utilize dissimilar divorce if statements internal one one other relish Russian dolls. They name these “nested ifs”.next time
there are lots of greater strategies you could utilize for movement control – together with issues relish swap statements. optimistically though, that you would breathe able to already notice how they may utilize these statements and ideas as a course to genesis making some useful issues. You might simply flip this code perquisite into a quiz already!
but in an exertion to definitely bow fabulous tools and video games, there are a few greater issues they need to explore. So shock! There goes to breathe a fragment two!
in the subsequent lesson, you're going to learn a course to create loops that iterate over time, in addition to how to create new courses and engage with them. notice you then!find out how To develop Your own Android App
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If you’re interested in Android development, chances are you’re going to need to learn some programming.
In most cases, that will value learning Java or Kotlin, either of which is officially supported by Android Studio, the official “IDE” for Android progress from Google. However, no one ever talks about XML, and this can lead to confusion when you open up a new project for the first time and notice that there are actually two different main files and two different types of script. Hence this article, which will serve as your introduction to XML for Android development.
chances are that you’re too going to need to understand this markup language
Unless you’re making a game using solidarity or Unreal, chances are you’re too going to need to understand this “markup language” to define your layout. If you try and skip it, eventually you’ll hit a road block.
Read on then to learn what XML is, why you need it, and how to salvage started.A basic introduction to XML and markup languages
XML stands for Extensible Markup Language, which gives us a clue to what it does.
A markup language is slightly different from a programming language. Whereas a programming language (C#, C++, Java, Kotlin, Python, BASIC) will allow you to define behaviors, interactions, and conditions; a markup language is used more to narrate data, and in this case, layouts. Programming languages create dynamic interactions, whereas markup languages generally handle things relish static user interfaces.
Here’s the technical course of looking at it:
(See this thread.)
Despite appearances, XML is not a programming language.
Markup languages control presentation data
In fact, XML was originally introduced by the World Wide Web Consortium (W3C) to deal with the inherent limitations of HTML. Specifically, HTML is not terribly readable for a computer, because it doesn’t elaborate what anything on the page actually is.
Consider the following specimen given by IBM Developer:
<p><b>Mrs. Mary McGoon</b><br>1401 Main Street<br>Anytown, NC 34829</p>
Here, you and I know the information is an address, but bar nothing the browser or computer knows is where to start new lines. That’s where something relish XML comes in handy.
Here’s how the selfsame information might hunt in XML:
<address><name><title>Mrs.</title><first-name>Mary</first-name><last-name>McGoon</last-name></name><street>1401 Main Street</street><city>Anytown</city><state>NC</state<postal-code>34829</postal-code></address>
XML is used anywhere that can profit from adding context to data. It is used across the web to bow search smarter and simplify data exchange. XML is actually based on the touchstone Generalized Markup Language (SGML), which has been used by the publishing industry for decades.
XML performs the selfsame function in Android app development: describing data and introducing elements.
Specifically, XML sets the layout of things relish buttons and images, and defines the font, color, and any text that shows by default. To bow those buttons actually finish anything, you will need to utilize a programming language relish Java or Kotlin, though.XML in Android development
When you create a new project in Android Studio, you will breathe greeted by a hierarchy of different files and folders, which can breathe a dinky daunting for complete beginners. It’s a rather jarring introduction to XML, no doubt!
You just need to concentrate on two files for now: MainActivity.java and activity_main.xml.
To bow life just a dinky simpler, Android Studio normally opens both these files as soon as it boots up.
Read more: Understanding Java syntax
You’ll too notice that both these files possess a dinky bit of code already in them. This is called “boilerplate code,” which is code that almost every program needs, and so which Android Studio will populate for you in order to redeem time.
One line in MainActivity.java reads:
This means the activity this Java code controls will display the activity_main.xml file, and you may reference certain elements from that as you go.
You can apportion any XML file to any Java file with this, and you can create as many of both as you like. However, by default MainActivity.java will always breathe the class (java file) Android loads first when running your programs.Using XML in your Android app
To recap, XML describes the views in your activities, and Java tells them how to behave. To bow changes to the layout of your app then, you possess two main options.
The first is to utilize the Design view. Open up the activity_main.xml file in Android Studio and salvage your first introduction to XML. You’ll notice there are two tabs at the bottom of that window: Design and Text. The Text view will exhibit you the actual XML code, but the Design view will let you manually edit the layout by dragging and dropping elements into the render of your activity.
XML files can too serve store strings. Using the Design view is easier for beginners, though it can lead to complications. For one, you will evade into the limitations of XML early on when the designer refuses to let you drop items into specific places. Without the scholarship of why, this can bow designing your app an exercise in frustration!
At the selfsame time, having a better understanding of XML will too serve when it comes to handling the code. Otherwise you might find yourself stumped when it comes to things relish finding the ID of the view, or remembering what sort of view it is you’re working with.
It is too practicable to “instantiate” views at runtime from within your code, but this can breathe tricky to juggle if you’re creating a knotty UX.XML outside of layout files
Sometimes XML will breathe used to narrate types of data other than views in your apps; acting as a kindhearted of index that your code can refer to. This is how most apps will define their color palettes for instance, meaning that there’s just one file you need to edit if you want to change the hunt of your entire app.
You can find this information in the colors.xml file, located in app > resources > values > colors.xml, which contains tags that apportion different names to various color codes:
You can then refer to this tag subsequently in your Java code or your XML code to refer to that particular hue.
Another alternative utilize of XML is in the Android Manifest (AndroidManifest.xml). This holds a lot of data describing your app, relish the label (the app’s name), the icon, and instructions about which activities to load first. This helps launchers display the app correctly on the homescreen, and it’s too used by app stores.Getting started with XML code for Android
Most of the time you’ll utilize XML to define your layouts. While they won’t travel too in depth in this introduction to XML for Android, let’s travel over some basics to serve you salvage started.Syntax
Apart from being another markup language, something else XML has in common with HTML is its utilize of tags.
XML mainly uses tags to insert elements into a layout, whether they’re Views or ViewGroups. A view is basically any of the widgets that bow up a typical utility app. Examples embrace images (ImageViews), text (TextView), editable text boxes (EditText), web pages (WebViews), and buttons (err, Button).
You’ll start by using angle brackets to open the section, then you’ll insert the view, and then you’ll set bar nothing the parameters. Some of these parameters will breathe compulsory, while others will breathe optional.Managing views and viewgroups
As you may already possess guessed, a ViewGroup is a group of these views. These are too referred to as layouts, and serve as hierarchical arrangements of views. A linear layout for specimen places bar nothing its children in a linear perpendicular or horizontal arrangement. Meanwhile, a ConstraintLayout will allow you to define the positions of views by their relationship with other views in the layout and the boundaries of the activity. This way, the views can maintain their relative positions, even as the dimensions of the device vary.
Some Views can too breathe ViewGroups, such as the RecyclerView, which arranges other views in a scrolling list.
If you open up your activity_main.xml file perquisite at the start for instance, you’ll notice it is already populated with some code. This is a simple TextView that shows the words “Hello World” as is traditional. If they hunt at this, it can give us some insight into how XML is used:
<EditTextandroid:layout_width=”328dp”android:layout_height=”402dp”android:text=”Hello World!”android:id=”@+id/text”app:layout_constraintBottom_toBottomOf=”parent”app:layout_constraintLeft_toLeftOf=”parent”app:layout_constraintRight_toRightOf=”parent”app:layout_constraintTop_toTopOf=”parent” />
So basically, it starts out by opening a constraint layout and telling it to “match_parent” meaning it will fill the exact selfsame size as the parent layout. In this case, there is no parent and so the activity itself becomes the default. bar nothing parameters are set before the closing angle bracket.
Next, it introduces the EditText and sets parameters such as the width, height, text to show, ID, and position. The ID is what they will utilize to refer to this EditText subsequently in their Java code, should they wish to change what it shows. Because they are using a ConstraintLayout, they need to control the layout by anchoring it to something else.
Let’s utilize the top, bottom, and sides of the “parent,” which is the ConstraintLayout. The View is now being pulled between those four points and will therefore sit comfortably at the point in the middle. If you switch to the Design view, you can notice this in action, denoted by tiny white arrows.
Notice that they quit this section with an ending tag: a forward slash, followed by the name, and the closing angle bracket. That tells Android we’ve finished talking about the EditText.
After that, they too need to create a closing tag to close off the ConstraintLayout ViewGroup. They could now insert a new sort of layout, or they could utilize nested layouts by adding a new ViewGroup tag inside the ConstraintLayout tags.Closing comments
In reality, XML is actually supremely simple and follows only a few set rules. The main complication is learning bar nothing of the different views and bar nothing of the different properties each needs defined. Fortunately, you can find a lot of this information online, or simply utilize the design view to experiment and notice how the code should look.
You might breathe bashing your head against the wall perquisite now thinking that there is “yet another thing to learn,” but once you salvage the hang of it, it will actually bow your life much simpler.
It might not “technically” breathe a programming language, but many people will narrate it as such anyway. So now that you’ve read their introduction to XML, you can pretense to actually know two new languages!Learn How To Develop Your Own Android App
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Instructor: Hiroki SayamaDate: Friday, March 1, 2019Time: 9 a.m. - 4 p.m. (Registration/coffee/light breakfast at 8:45 a.m., Lunch 12-1 p.m.)Location: Symposium Hall, Innovative Technologies knotty (ITC), Binghamton University85 Murray Hill Road, Vestal, NY 13850Credentials: A micro-credential (digital badge) will breathe issued to students who pass a group assigment at the quit of the day. Participation certificates will breathe issued to bar nothing participants.Who can consume this course: This course is open to bar nothing engineers, professionals and students.REGISTER HERE ABOUT THE COURSE
This course introduces computer programming in Python for those whohave dinky or no prior computer programming experience. The coursewill breathe heavily based on hands-on exercises, so participants arestrongly encouraged to bring their own laptops. The following topicswill breathe covered:TOPICS
The following topics will breathe covered:
1. Software installation and language basics2. Variables and data structures (strings, lists, matrices, dictionaries)3. flux control and function definition4. Plotting and visualization5. Using modules6. Object-oriented programmingABOUT THE INSTRUCTOR
Hiroki Sayama is a Professor in the Department of Systems Science and Industrial Engineering. His research interests embrace knotty dynamical networks, collective behaviors, sociable systems modeling, artificial life/chemistry, mathematical biology, computer and information sciences.
$295 touchstone Rate$195 BU faculty/staff/Alumni$75 Students (must breathe matriculated)REGISTRATION
Register before Wednesday Feb. 27, 2019.Confirmation and course information will breathe emailed to registrants. embrace your email address on your registration form. If you possess not received confirmation seven days before the start of the program or possess a question about the registration process convoke the Office of Industrial Outreach at 607-777-6241.PAYMENTS
Credit Card: A payment link for a secure transaction will breathe sent to you prior to the course start. They accept payment via PayPal as well as VISA, MasterCard, American Express and learn credit cards. Your purchase will materialize on your credit card statement with the following notation: *PAYPAL RFBU WATSON. Payments must breathe made before March 1, 2019.
Check: Please email firstname.lastname@example.org if you wish to pay by check. tickle bow checks payable to: Research Foundation Award # 77136 and bow sure to write "DAT1902" in the topic line. Mail check with the printable registration figure to:Astrid StromhaugBinghamton UniversityWatson Industrial OutreachPO Box 6000Binghamton, NY 13902-6000
For questions, contact the Office of Industrial Outreach at:Phone: 607-777-6241Email: email@example.comCANCELLATIONS AND REFUNDS
All cancellations must breathe received in writing by noon at February 28, 2019, at 5 pm to receive a refund. No refunds for cancellations or non-attendance will breathe given after 5 pm on that date.
Substitutions may breathe made any time before a certain date by informing the Office of Industrial Outreach.
If the course is canceled, enrollees will breathe advised and receive a full refund.
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