Posts tagged ‘C#’

Using the Android Fused Location Provider

location-clipart-map_pinIn this post, I’ll walk you through the code in a very minimal app that just demonstrates getting locaiton. This app was created using the Xamarin Android platform, so it is written in C# but still uses the Fused Location Provider API which is provided by Google Play Services . My code is available on GitHub in a Xamarin Studio / Visual Studio solution: Geolocation Demo. (more…)

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May 27, 2016 at 2:29 pm 2 comments

The Google Play Services APIs for Android

GooglePlayServices

Why Use the Google Play Services APIs?

Google Play Services (also known as Google APIs for Android) and abbreviated GPS, is a set of APIs that are delivered in the form of an app that can be updated via the Google Play Store. The reason Google provides these APIs this way is to reduce fragmentation of the Android platform. Fragmentation is a result of many different versions of Android running on devices out in the wild. (more…)

May 27, 2016 at 10:05 am 1 comment

Learn to Write iOS Apps!

iPad+iPhoneNext term, Winter 2016, at Lane Community College, I will be teaching a course in iPad and iPhone app development, CS235IM, Intermediate Mobile App Development: iOS. This is a beginning course  in writing apps for iOS (the title “intermediate” is misleading). We will be using the Xamarin platform to write native apps using C#.  As a student, you will get a free Apple developer license and free Xamarin iOS and Android developer licenses. This course is offered for college credit (4 credits) and will be offered both on-campus and online. Online students can participate from anywhere in the world and at any time of the day (or night)! (more…)

November 17, 2015 at 5:50 am 2 comments

Highest Demand Programming Languages in March 2015

ProgrammingLanguageListingsOnDiceA question that I hear frequently is: “Which programming language (or languages) should I learn? Usually the person asking is a student and what they really mean is, “What programming language will get me a job?!” My usual answer is that it’s more important to focus on learning concepts (like: inheritance, composition, polymorphism, data structures, design patterns, etc.) because these are pretty much the same regardless of language. If you learn C# in-depth, and then get a job where you need to use Java, you should be able to apply the concepts you know (and even a lot of the syntax) and pick up Java quickly. But, of course, you would still want to choose a language that is at least in the top dozen, as far as job demand. (more…)

March 27, 2015 at 3:11 pm 3 comments

C# Pass-by-reference – Concept and example

670px-Pass-a-Soccer-Ball-Step-3-Version-2One of the concepts that many of my beginning programming students find difficult to wrap their heads around is the different ways that arguments can be passed when a method is called.  The two mechanisms for passing an argument to a method are pass-by-value and pass-by-reference.

(No, this post isn’t about soccer, I just wanted to get you thinking about passing.)

Advice to new programmers: Skip this paragraph. But the rest of this post is for you!
Before launching into our discussion, I need to clarify that we’re only talking about what happens when we pass value types to method parameters. Value types are the types enum and struct. The numeric types and bool type that are built into C# are all actually structs and so they are all value types. Interestingly, strings are not value types, they are reference types, but that’s a topic for another post!

I should make another clarification too. When I talk about the code that calls a method, I refer to the variables passed to the method as arguments, but when I talk about the code that defines a method, I call the variables inside the parenthesis parameters.

Pass by Value
Let’s take a look at a “normal” C# method definition:

     int Sum(int num1, int num2)    // this method returns the sum of num1 and num2
     {
          return num1 + num2;
     }

(more…)

March 15, 2015 at 5:20 pm Leave a comment

Happy Pi Day!

It’s Pi day and it’s a once-every-hundred-years Pi day! It’s a spceial Pi day since the year ends in 15. So the date: 3-14-15, matches the number Pi to four decimal places: 3.1415.

Kash Farooq has provided a nice set blog posts showing different methods for calculating Pi using C#. Here they are:

Calculating Pi in C# part 1 – using series algorithms

Calculating Pi in C# part 2 – using the .NET BigInteger class

Calculating Pi in C# part 3 – using the BigRational class.

March 14, 2015 at 9:45 am Leave a comment

Resources for Learning C# and .NET

CSharpLogoI compiled this list of resources for students in my Xamarin Android and iOS app development courses. These are the best resources I have found for learning C#. They are categorized for new programmers and for programmers who already know another language. If you have found some other great resources, tell everyone about them in a comment!
(more…)

September 27, 2014 at 4:54 pm Leave a comment

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