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Hi All, Opinion requested. I have a large C# Windows application That has a complex math component (in C#).
I also have a large Android application, written in JAVA. I believe Xamarin may be the correct route, but I am open to suggestions.
I would like to somehow share the math component between the two apps. I am open to transcribing the component into a new language and have both applications access/share the code.
Thanks In advance.
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I have done Android development in both Xamarin using C# and Kotlin.
I am more familiar with C# so I would personally tend to err with something I am familiar with.
However there is a lot of support on SO and other forums, as well as from google for Kotlin.
So I can't really offer a recommendation other than saying go with something that has a lot of support and postings on forums like CodeProject and SO.
I say this because Android can be one massive PITA at times, I have just been spending the week battling with dates because a someone wants to use a version of Android released just over four and a half years ago and the older Java releases don't handle date locales particularly well.
So if you are like me I would say that go for something you are familiar with because Android is going to throw a lot of curve balls your way.
If you like adventure then go for something like Flutter, React or Kotlin.
“That which can be asserted without evidence, can be dismissed without evidence.”
― Christopher Hitchens
modified 7-May-20 14:22pm.
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Xamarin is cool and easy, why do you even ask when there is a mandatory shared component?!
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Maybe a web based app? With Electron it can run on Windows and there are other similar technologies available to bundle it to run on Android.
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Hello,
if your objective is to share only the math component, then you probably can create a C++ DLL ( for the Windows side ) and .SO ( for the Android side ) and interface your existing C# and Java code (JNI) with this DLL. So only the math component needs to be ported (to C++).
If you really want to port everything (both apps) to the same language, then C# (Xamarin) is probably a good choice. I also propose a free open source C++ cross-platform framework ( https://Kigs-framework.org ).
Stéphane Capo
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If c++ is an option, then definitely check Qt + Qml.
Pros: fast; very productive (declarative) qml for ui; Mac, Linux and IOS versions for 'free'.
Cons: steep learning curve, messy licensing
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I have had very good experiences with Delphi and Lazarus (Pascal) for cross platform development - even for Linux and Mac. You don't have any dependencies (like .NET libraries) and you create really native applications for the operating system!
- Delphi (Community version available): Delphi: IDE Software Overview - Embarcadero
- Lazarus: Lazarus Homepage
pascal is a robust and mature programming language that you can rely on even in 10 years. Compared to other languages/frameworks/libraries, all my applications worked maintenance-free (independent of the operating system version - even under Windows XP... This is simply indescribable!).
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I agree completely with the Delphi route. Though, it would be a complete rewrite of the libraries and the UI. I've been using Delphi for ages and love it. You can get quite a lot accomplished in a short amount of time - think old school drag and drop placement of components for all platforms. You'll obviously need a Mac to target iOS and macOS, but if you're targeting only Windows and Android, all you need is your Windows machine.
If a total rewrite is an option, I'd highly recommend Delphi.
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You can't get there from here, as they say, with any reasonable semblance of security, privacy and ownership. Best to give up. 
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To my humble opinion Xamarin should be the best solution. You can use the C# part in the shared solution and the Java part in the Android solution. By using Interfaces you can combine the two.
For shared pages I should write as much code as possible in the shared part. The C#/XAML combination has an easy learning curve.
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Have you had a look at Kotlin? Yes, it's java but it will work on both Windows and Android. It's a great language and it also has a 'native' version that will no doubt become even more important in the future.
cheers.
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C# is faster than Java. Just use C# and Xamarin with LLVM. Way better option.
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Too many people are making coronavirus jokes, and frankly I'm sick of it.
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
AntiTwitter: @DalekDave is now a follower!
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Let me mask you a question: are your colleges sans ties or do do they where them when working at home?
| Ravings en masse^ |
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| "The difference between genius and stupidity is that genius has its limits." - Albert Einstein | | "If you are searching for perfection in others, then you seek disappointment. If you seek perfection in yourself, then you will find failure." - Balboos HaGadol Mar 2010 |
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I agree somewhat, but infect there are some good ones.
"the debugger doesn't tell me anything because this code compiles just fine" - random QA comment
"Facebook is where you tell lies to your friends. Twitter is where you tell the truth to strangers." - chriselst
"I don't drink any more... then again, I don't drink any less." - Mike Mullikins uncle
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I'm sure you are, and don't call me Frankly.
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I've got it twice as bad:
I'm tired of being sick and sick of being tired.
infinite loop?
pestilence [ pes-tl-uh ns ] noun
1. a deadly or virulent epidemic disease. especially bubonic plague.
2. something that is considered harmful, destructive, or evil.
Synonyms: pest, plague, CCP
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I'm guessing you're still sick of it - this must be the first day in living memory you're not on the QA "top experts" lists. 
Has there been any change, or are you still as sick as a parrot? (Hopefully not a Norwegian Blue...)
Hope you both recover soon.
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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Oh man...  
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The worse jokes are from those who on ventilators...
Apparently they have a sick sense of humor!
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Jokes are the only way to survive "virus hype", exploded by USA. F** that virus, it's just a flu!
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Gawd I wish that was true: this is not just a flu, it's a teenage boy flu on massive quantities of steroids that is still drunk, stoned, and tripping balls after his night out last night. And has just found the keys to John Wick's 69 Mustang and his gun cabinet.
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
AntiTwitter: @DalekDave is now a follower!
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