I've got a static library, which was used to generate the wrapping code by Sharpie. The library was Built after that (including, generated *.dll) successfully.
AppDefinition.cs contains the namespace and the mappings, like this:
namespace TheNamespace
{
// #interface TheParameters : NSObject
[BaseType(typeof(NSObject))]
interface TheParameters
{
The library itself built in Release mode with LinkTarget.ArmV7 | LinkTarget.ArmV7s | LinkTarget.Arm64.
However, when referencing this binding project from my iOS project, it works only in Debug mode.
When I change it to Release, the namespace (and all the related clasees) not available. Also, when exploring the binding library reference in Object Browser, it doesn't display any elements: it's totally empty.
Just to point that: it gets available when changing it in the dropdown to Debug and disappears on Release, what's interesting, undependently on what actually project is selected in Current Project dropdown!
What might be the issue? Thanks!
I think the problem should come from when building static library .When generating static library , there is a build type of release/debug to select.
Above screenshot shows static library types after building , there are three types (Two is Debug and One is Release ). You can see that tt distinguishes between release and debug .
After some Googling I found the solution.
The issue happens because of Visual Studio bug, I guess. And also referred here. (And it's weird it's not mentioned in Xamarin docs on Microsoft website.
To resolve the issue the Binding Project(s) must not reside in the same solution with the main project. Just remove them and attach the library as regular reference.
Related
I'm trying to create a Maui class library that has platform dependent sections.
In the class library's platform section for Android I've added code for Android, but when I compile it tells me that it can't find the Android namespace. I've check the Nuget packages against the main program that does compile Android and there the same. I've unloaded both the main project and the class library and check the project code against each other and there almost identical. The only difference that I can find between the main project that does compile Android is that the class library has an extra net6.0 dependency.
I've created a ".NET MAUI Class Library (Preview)" in VS 2022 Preview 3. Indeed, something is wrong - especially with Intellisense. I did not find a way to suppress certain Intellisense errors, but I did succeed in getting it to build.
NOTE: I confirmed that most of the issues do not interfere with Building the project. Indeed, its possible that the problem is ONLY with Intellisense; I didn't rigorously determine whether Build always worked.
1) OPTIONAL: In .csproj, REMOVE .net6.0; from start of <TargetFrameworks>. BUT DON'T remove, if you are making a library that doesn't contain platform-specific code.
EXPLANATION: This only affects Intellisense; can Build without doing this.
Normally this is wanted in a .net6 class library, but until VS Intellisense correctly handles Maui Class Libraries, with their platform-specific code, this tends to cause extra Intellisense complaints. If you do (4) for all platform-specific files, you can probably leave .net6.0; in, without extra Intellisense errors.
2) Above any source file, is a dropdown that says YourLibName (net6.0-xxx). When working on Android code, pick YourLibName (net6.0-android).
EXPLANATION: This only affects Intellisense; can Build without doing this.
3) In your code, use global::Android instead of Android.
EXPLANATION: Intellisense seems to be confused about the context it is in. global:: ensures that it is looking for a "top-level" namespace.
4) In a class library, Intellisense isn't recognizing platform folders - wrap all code in appropriate #if ANDROID, #if IOS, etc.
EXPLANATION: This only affects Intellisense; can Build without doing this.
This removes errors for a class that is defined differently in multiple platforms; e.g class PlatformClass1.
5) using Android;, using Android.App, etc - do work (in platform-specific folder) when "Build" - even if Intellisense complains.
I had the same problem -- I was determined not to believe #ToolmakerSteve's response but I'm afraid he's correct. Especially #4 of his post about wrapping all platform specific content with
#if ANDROID
#endif
Also add it to your interfaces that reference platform specific namespaces.
Here's a link to a Microsoft page regarding this:
invoke platform specific code
I am trying to build Xamarin Android binding libraries for two different RFID hand held scanner SDKs (from two different companies), and then reference them in a Xamarin.Android project. So the end goal is to have one application that can run on Device A or Device B and depending on the device manufacturer it will use a different implementation of a "scanner" interface. If I try to reference both of the resulting dlls from the Xamarin.Android project, then I get the following error:
Program type already present: com.hsm.barcode.DecodeOptions
Looking in the jars using JD-GUI as suggested in the Microsoft Docs I can see the problem is that both of the jars have a com.hsm.barcode package:
What is the best way to workaround this issue?
Note that if I use only one of the dlls then I have no issues.
What I have tried:
Using a single Xamarin Android binding library project for both jars - this gave exactly the same result
Renaming all of the classes in the jar to eliminate duplicate class names like this: <attr path="/api/package[#name='com.hsm.barcode']/class[#name='DecodeOptions']" name="name">DecodeOptions2</attr>. When I do this, in reflector I can see that the class name has indeed changed, but I still get the build error when building the Xamarin.Android project
Renaming the namespace in one of the projects: <attr path="/api/package[#name='com.hsm.barcode']" name="name">com.hsm.barcode2</attr>. Again, I can see the updated namespace in reflector but still I get the same "Program type already present" error when building the Xamarin.Android project
Similarly I have tried removing both the namespace and the duplicate classes using remove-node but seen similar results
This leads me to believe that this isn't necessarily an issue with the binding process but rather a more Android related problem. I have found some similar Android questions where people mention that you can use exclude module in gradle to remove dependencies [1] [2], but a) there seems to be no concrete answer that this is the right approach in this case and b) as I have been able to find gradle is not a tool that is used as part of the Xamarin/Visual Studio process.
My final desperate attempt to get something working was to unzip one of the jar files, remove all the .class files that are causing issues, then rezip and use this in the Android binding library and then reference this dll in my Xamarin.Android project. This seems to work (the project builds and runs) but I'm not sure it is the correct/safest/most stable solution.
To summarize, the question is: if you have two jars with duplicated namespaces/packages and you want to use both of these Jars in a Xamarin.Android project how can you avoid the resulting Program type already present: com.hsm.barcode.DecodeOptions error message.
Is it possible to link two Core libraries into your app?
I would like to create one Common.Core library that has login and account view models.
I would like another one Domain.Core library that has some domain view models in it.
These could be used across a couple different projects.
In my app, I do a new Setup().Initialize().
My Setup class overrides CreateApp() ...
public class Setup : MvxPhoneSetup
{
protected override IMvxApplication CreateApp()
{
CreatableTypes().EndingWith("Service").AsInterfaces().RegisterAsLazySingleton();
return new Common.Core.App();
// TODO: can I setup a Domain.Core library here too?
}
}
I have tried doing this ...
CreatableTypes(Assembly.Load("Domain.Core")).EndingWith("Service").AsInterfaces().RegisterAsLazySingleton();
but I'm getting a ReflectionTypeLoadException when I try to resolve a domain model from there.
Anyone tried something like this?
Thanks!
Yes, using multiple 'core' projects should work.
The ReflectionTypeLoadException occurring on Resolve suggests that maybe your second Assembly requires another Assembly that isn't available? Do you get the same problem with a very simple second core project? Can you get any more information about the exception? Which platform is this occurring on?
If you want to load ViewModel types from multiple assemblies, then there is a Setup method you can override - The default ViewModelLocator in MvvmCross gets its list of ViewModels from the assemblies listed in Setup - see MvxSetup.cs
(Sorry this list is in the ui project - should really be in the main core project)
For cross-platform compatibility, I don't recommend using Assembly.Load - better to use a more static method like typeof(Domain.Core.Something).Assembly
Working on 'packaged application' platforms like xamarin.android and (especially) xamarin.ios I don't recommend using Assembly.Load - this will only work on the iOS platforms if the assembly is referenced statically and has already been loaded - that's the reason plugins have a special bootstrap file on iOS. Also be aware that the name used in Assembly.Load is different on different platforms - eg in Android you must use the filename ending in .dll - see MvxAndroidSetup.cs. For other platforms like WP and winRT, then Assembly.Load may work more conventionally though - although I've personally spent hours/days/weeks swearing at this sort of code in the last year.
This one is weird. I've got a MonoDevelop/MonoTouch project (call it MyApp) that references another project (call it MyUtils), which is a Portable Class Library (targeting .NET 4.0.3, if that is relevant).
In the MyApp project, I've added a reference to MyUtils. In Visual Studio, this works properly: I can refer to the classes in MyUtils without any problem.
But in MonoDevelop on the Mac, if I try to refer to MyUtils from MyApp, I can't. It simply doesn't see the project, and can't, for instance, write something like:
using MyUtils.MyNamespace
If I do, I get a 'type or namespace could not be found' error.
But here's the weird part: MyApp can use the static classes in MyUtils. If I refer to a public static class in MyUtils from MyApp, it works! What could possibly explain this?!
What explains this is that the MonoTouch implementation of PCLs is a bit of a kludge at present.
The proper work is underway, but in the meantime you need to use an interim release of MonoDevelop, and you need to be aware that things like Intellisense and syntax highlighting don't really work in MonoDevelop.
See:
MonoTouch: creating multiplatform apps using Portable Class Libraries
http://slodge.blogspot.co.uk/2013/02/the-future-is-portable.html
Update - the interim release is hidden in a comment on that question:
For those doing PCL stuff, I've posted a patched MonoDevelop 3.1.1 build with improved PCL support here: http://files.xamarin.com/~jeff/MonoDevelop-3.1.1.dmg - it's still not perfect, but it's better than the official builds so far (my patches will be in a future official release) – jstedfast Feb 8 at 14:57
I want to add my own project type based on IronStudio. So,
I downloaded the source for and compiled the latest version of IronPython, then
I created a new Visual Studio Package.
I added the Templates\Projects\MyProject folders, and added a file to it, and set its property "Include in VSIX" to true.
Then modified the main Package class to be derived from IronStudio's PythonProjectPackage instead, and set the ProvideProjectFactory property:
[ProvideProjectFactory(
typeof(PythonProjectFactory),
"Django Project",
"Django Project Files (*.myproj);*.myproj",
"myproj", "myproj",
#"Templates\Projects\MyProject",
LanguageVsTemplate="MyProject")]
public sealed class MyPackage : PythonProjectPackage
And ran it. But MyProject isn't showing up in the project templates. Why not?
The generated .pkgdef file looks like this:
[$RootKey$\InstalledProducts\VSPackage3Package]
#="#110"
"Package"="{5cd7435c-7461-459f-80bc-c0c79e9d462f}"
"PID"="1.0"
"ProductDetails"="#112"
"LogoID"="#400"
[$RootKey$\Packages\{5cd7435c-7461-459f-80bc-c0c79e9d462f}]
#="Microsoft.VSPackage3.VSPackage3Package, VSPackage3, Version=1.0.0.0, Culture=neutral, PublicKeyToken=a4f1577d825253f8"
"InprocServer32"="$WinDir$\SYSTEM32\MSCOREE.DLL"
"Class"="Microsoft.VSPackage3.VSPackage3Package"
"CodeBase"="$PackageFolder$\VSPackage3.dll"
[$RootKey$\Editors\{888888c4-36f9-4453-90aa-29fa4d2e5706}]
"Package"="{5cd7435c-7461-459f-80bc-c0c79e9d462f}"
[$RootKey$\Editors\{888888c4-36f9-4453-90aa-29fa4d2e5706}\Extensions]
"py"=dword:00000020
[$RootKey$\Editors\{888888c4-36f9-4453-90aa-29fa4d2e5706}\LogicalViews]
"{7651a701-06e5-11d1-8ebd-00a0c90f26ea}"=""
[$RootKey$\Editors\{888888c4-36f9-4453-90aa-29fa4d2e5706}\LogicalViews]
"{7651a702-06e5-11d1-8ebd-00a0c90f26ea}"=""
[$RootKey$\Editors\{888888c4-36f9-4453-90aa-29fa4d2e5706}\LogicalViews]
"{7651a703-06e5-11d1-8ebd-00a0c90f26ea}"=""
[$RootKey$\CLSID\{888888fd-3c4a-40da-aefb-5ac10f5e8b30}]
#="Microsoft.IronPythonTools.Project.PythonGeneralPropertyPage"
"InprocServer32"="$WinDir$\SYSTEM32\MSCOREE.DLL"
"Class"="Microsoft.IronPythonTools.Project.PythonGeneralPropertyPage"
"CodeBase"="$PackageFolder$\VSPackage3.dll"
"ThreadingModel"="Both"
[$RootKey$\Projects\{888888a0-9f3d-457c-b088-3a5042f75d52}]
#="PythonProjectFactory"
"DisplayName"="My Project"
"DisplayProjectFileExtensions"="My Project Files (*.myproj);*.myproj"
"Package"="{5cd7435c-7461-459f-80bc-c0c79e9d462f}"
"DefaultProjectExtension"="myproj"
"PossibleProjectExtensions"="myproj"
"ProjectTemplatesDir"="$PackageFolder$\Templates\Projects\MyProject"
"Language(VsTemplate)"="MyProject"
[$RootKey$\NewProjectTemplates\TemplateDirs\{5cd7435c-7461-459f-80bc-c0c79e9d462f}\/1]
#="My Project"
"SortPriority"=dword:00000064
"TemplatesDir"="$PackageFolder$\Templates\Projects\MyProject"
[$RootKey$\Projects\{888888a0-9f3d-457c-b088-3a5042f75d52}]
#="PythonProjectFactory"
"DisplayName"="IronPython"
"DisplayProjectFileExtensions"="IronPython Project Files (*.pyproj);*.pyproj"
"Package"="{5cd7435c-7461-459f-80bc-c0c79e9d462f}"
"DefaultProjectExtension"="pyproj"
"PossibleProjectExtensions"="pyproj"
"ProjectTemplatesDir"="$PackageFolder$\.\NullPath"
"Language(VsTemplate)"="IronPython"
[$RootKey$\NewProjectTemplates\TemplateDirs\{5cd7435c-7461-459f-80bc-c0c79e9d462f}\/1]
#="IronPython"
"SortPriority"=dword:00000064
"TemplatesDir"="$PackageFolder$\.\NullPath"
[$RootKey$\Services\{b98e41c4-581e-3532-beee-06829b683d39}]
#="{5cd7435c-7461-459f-80bc-c0c79e9d462f}"
"Name"="IPythonStarter"
I just want to get the bare bones up and running so I can start overriding some functionality (like the Add New Item dialog).
Update:
Reading my initial analysis once again increases my impression that some of the required components are missing (e.g. a dedicated ProjectFactory) and/or wired up incorrectly - from the MSDN documentation of the ProvideProjectFactoryAttribute Class:
ProvideProjectFactoryAttribute declares that a package provides a project factory.
And further:
If a VSPackage declares that it provides a project factory, it should create the factory and offer it to Visual Studio in the Initialize method of the Package-derived class.
You package is declaring to provide PythonProjectFactory, but (likely) doesn't offer it to VS, rather it is offered by the IronPython package. In turn you are providing arguments within the ProvideProjectFactory attribute list which PythonProjectFactory won't know about when asked for by VS.
Consequently you should at least provide a dedicated ProjectFactory yourself as per the walkthrough, wire up the classes accordingly and see how this turns out regarding the issues outlined below.
Initial analysis:
There appear to be several issues here at first sight - have you followed any tutorial on how to do this? In case, please note that some of those easily discoverable via search engines are outdated still. Either way I'd try working through and/or comparing your result with Walkthrough: Part 1 - Creating a Basic Project System from the MSDN documentation for VS 2010; please note that even this one is claimed to be outdated a bit according to the Community Content section on the bottom of the page.
Here is what I'd look into myself given the code you present, comparing with the walkthrough on the fly for more insights:
You realized already that the duplicate fragment starting with the GUID above PythonProjectFactory doesn't make sense - this is essentially trying to register two packages at once, which, even if allowed at all syntactically (which I doubt), can't possibly work like so due to both being registered with the same GUID [cross checking with the sample file in section Examining the Template Registration confirms this suspicion, as expected there is only one such fragment].
Please note that the GUID in question is the one identifying PythonProjectFactory (as per the respective source code), see below for more on this.
[Guid(PythonConstants.ProjectFactoryGuid)]
public class PythonProjectFactory : ProjectFactory {
Given .pkgdef is a generated file the next question is where this duplication/violation stems from. When two generated artifacts end up with the same GUID the respective definition in the sources is most likely messed up somehow, usually due to copy&paste duplication. Consequently you should verify whether {5cd7435c-7461-459f-80bc-c0c79e9d462f} is defined and referenced as intended, though here might be one or two other causes as well for this, see below.
A Package class needs to be identified by a GUID and the VS wizard generates some already in Guids.cs and references it accordingly on the class definition, however, the following is missing in your fragment [cross checking with the sample fragment in section To register the project template confirms this omission as well]:
[Guid(GuidList.guidMyPackagePkgString)]
public sealed class MyPackage : Package
Likewise it appears incorrect to derive MyPackage from PythonProjectPackage but reference PythonProjectFactory still rather than providing MyFactory as well (including a dedicated GUID), because the latter tells Visual Studio the location of your project template folder [see section Creating a Skeletal Project Factory]:
While it might well be possible to simply reuse all functionality from the base class PythonProjectFactory, inheriting is likely required simply because the factory must have a dedicated GUID too (as outlined in the walkthrough) in order to properly wire up the attribute specified data.
Likely unrelated, but still suspicious is that your two code blocks don't relate, as the Package class definition specifies Django Project Files (*.myproj);*.myproj, yet the result shows My Project Files (*.myproj);*.myproj.
Have you by chance mixed this from different builds or is this really a result of a clean one?
Good luck!
This stackoverflow posting might be helpful: VS2010: VSIX installation doesn't deploy item templates inside it
If this is not what you're looking for, try to see if you're missing something around the creation of custom project templates, I believe that's where the "missing link" is:
For VS 2008:
http://blogs.msdn.com/b/webdevelopertips/archive/2008/12/02/tip-32-did-you-know-how-to-easily-create-your-own-project-templates.aspx
For VS 2010:
http://blog.reybango.com/2010/09/21/how-to-create-html5-website-and-page-templates-for-visual-studio-2010/
and on MSDN:
http://msdn.microsoft.com/en-us/library/s365byhx.aspx
and here is how to create a project
template manually:
http://msdn.microsoft.com/en-us/library/ms185291.aspx
and here is how to create a new item template in VS 2010: http://msdn.microsoft.com/en-us/library/ms247113.aspx
Hope this helps
$PackageFolder$.\NullPath may have something to do with it.