Recently I asked a question over trying to get my theme recognized within the android test project: Unit testing a Xamarin Forms Android specific code project
I'm not running into a conflict that shows up within xunit / nunit as the testing strategy. I feel like it's because the FormsAppCompatActivity with an older activity type, but I'm new to Xamarin and am unsure on how to approach this.
I get a lot of these type of errors:
Attribute "layout_anchorGravity" already defined with incompatible format.
The full list of the similar Attribute errors is:
fabSize
tabMode
expandedTitleGravity
layout_scollFlags
layout_collapseMode
collapsedTitleGravity
tabGravity
showDividers
displayOptions
showAsActions
actionBarSize
finally I have the addition error:
Found tag styles where item is expected
//Within the Android Forms project, I have this inheritance:
public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity {
// typical code
}
//within the Android UITest project
public class MainActivity : Xunit.Runners.UI.RunnerActivity {
// tests can be inside the main assembly
AddTestAssembly(Assembly.GetExecutingAssembly());
AddExecutionAssembly(typeof(ExtensibilityPointFactory).Assembly);
// or in any reference assemblies
//AddTestAssembly(typeof(PortableTests).Assembly);
// or in any assembly that you load (since JIT is available)
#if false
// you can use the default or set your own custom writer (e.g. save to web site and tweet it ;-)
Writer = new TcpTextWriter ("10.0.1.2", 16384);
// start running the test suites as soon as the application is loaded
AutoStart = true;
// crash the application (to ensure it's ended) and return to springboard
TerminateAfterExecution = true;
#endif
// you cannot add more assemblies once calling base
base.OnCreate(bundle);
}
Related
I am using Visual Studio for Mac 7.6.6 to create a Xamarin.Forms app targeting macOS (to be shared with something running on Windows). I create a new Project and select
Multiplatform App | Blank Forms App. Click Next
Configure your Blank Forms App. There are target platforms: Android and iOS.
(There is nothing for macOS). Since I have not installed the build toolkits for either iOS and android, both of these checkboxes are disabled. Therefore the Next button on this wizard page is disabled.
How do I proceed? I assume there is no way to use the New Project wizard for this.
I came across an old post for starting with a Xamarin Cocoa app and using NuGet to put the Xamarin Forms functionality but don't understand the code
LoadApplication(new App()); // <-- don't know what App is
I suspect the VS Mac and Xamarin.Forms are out of sync being on the bleeding edge. Has anyone gotten this to work?
I would suggest following SushiHangover's suggestion since that is simpler which is what you have done already:
Add a new CocoaApp project to your solution.
Install Xamarin.Forms NuGet package into your CocoaApp.
Reference the shared project or .NET Standard project from your CocoaApp project.
Edit info.plist and remove the source entry (NSMainStoryboardFile).
Change the AppDelegate to derive from Xamarin.Forms.Platform.MacOS.FormsApplicationDelegate.
Update Main.cs to initialize the AppDelegate
In the AppDelegate's DidFinishLaunching add the code to initialize Xamarin.Forms.
Create a new NSWindow which should be returned from the MainWindow property in the AppDelegate.
Main.cs:
static class MainClass
{
static void Main(string[] args)
{
NSApplication.Init();
NSApplication.SharedApplication.Delegate = new AppDelegate();
NSApplication.Main(args);
}
}
AppDelegate.cs:
[Register("AppDelegate")]
public class AppDelegate : Xamarin.Forms.Platform.MacOS.FormsApplicationDelegate
{
NSWindow window;
public AppDelegate()
{
var style = NSWindowStyle.Closable | NSWindowStyle.Resizable | NSWindowStyle.Titled;
var rect = new CoreGraphics.CGRect(200, 1000, 1024, 768);
window = new NSWindow(rect, style, NSBackingStore.Buffered, false);
window.Title = "Xamarin.Forms on Mac!";
window.TitleVisibility = NSWindowTitleVisibility.Hidden;
}
public override NSWindow MainWindow
{
get { return window; }
}
public override void DidFinishLaunching(NSNotification notification)
{
Xamarin.Forms.Forms.Init();
LoadApplication(new App());
base.DidFinishLaunching(notification);
}
public override void WillTerminate(NSNotification notification)
{
// Insert code here to tear down your application
}
}
However Visual Studio for Mac does include a Mac project with the Xamarin.Forms project templates. However it does not expose this in the New Project dialog currently. You can create a Mac Forms project from this template but it is a bit more work than what SushiHangover suggested and you have used.
Install the Xamarin.Forms project template into the .NET Core project templates
dotnet new --install "/Applications/Visual Studio.app/Contents/Resources/lib/monodevelop/AddIns/Xamarin.Forms.Addin/Templates/Xamarin.Templates.Multiplatform.0.0.1.nupkg"
Create a new Forms project including the Mac project (you may want to review and set other template parameters - the following creates a blank Forms app with Android, iOS, Mac, UWP and a Shared project).
dotnet new forms-app --CreateMacProject -k blank
Create a new blank solution (Other - Miscellaneous - Blank Solution) in the parent directory of the projects you just created.
Add all those projects created to the solution.
Then you can build and run the Mac project which includes Xamarin.Forms.
Note you may want to remove the Xamarin.Forms project template from the .NET Core project templates which you can do by running the following:
dotnet new --debug:reinit
In addition to the approved answer, which is incomplete with recent updates, now you have to do one more step.
Link the delagate in the Mac project main class
main.cs:
static class MainClass
{
static void Main(string[] args)
{
NSApplication.Init();
NSApplication.SharedApplication.Delegate = new AppDelegate();
NSApplication.Main(args);
}
}
nota. My edit was refused and I'm not allowed to add comments. So I added a complementary answer to help those looking for help now.
I am developing UWP app in xamarin. The application works on IOS, Mac , Android, Windows. I have created UWP project in it according to the tutorial given in developer.xamarin.com. But it giving error saying Accessibility.App namespace not found.
Here is my code:
namespace Accessibility.UWP
{
public sealed partial class MainPage
{
public MainPage()
{
this.InitializeComponent();
this.LoadApplication(new Accessibility.App());
}
}
}
According to your description, the app can't see Accessibility.App. As you claim that Android and iOS projects work there are two things that can cause the problem:
you don't have the reference to your Shared/PCL project in your UWP project (most likely).
you have possibly changed the namespace / class name in the Shared/PCL project to something else than Accessibility.App
This is usually caused by missing reference to the shared project or class library where Xamarin.Forms App class resides. From the description this project should be called Accessibility.
Right-click the UWP project select Add, Reference... then in Solution tab select the Accessibility project.
Also it might happen that the UWP project didn't pick up on the reference, so restarting Visual Studio might help as well.
If all fails, you can try to use class name binding with using. On top of the source code file add:
using FormsApp = Accessibility.App;
And then in code use:
this.LoadApplication(new FormsApp());
I created a Xamarin Forms app.
And inside a new page with a label named "MyLabel".
In the code behind for my page I have
private void SetUpUI()
{
#if __IOS__
this.MyLabel.BackgroundColor = Color.Navy;
#endif
}
In my iOS project options I can see symbol __IOS__ in the "Compiler" tab. (please see screenshot)
When I run in iOS it doesn't make the label blue:
But if I remove #if __IOS__ block it makes the label blue:
So it seems conditional compilation is not working.
I'm on a Mac. So couldn't test on Visual Studio.
Stuck with it for a long time but cannot figure out what I missed.
The answer of SushiHangover is correct: your PCL project won't have the compiler definitions for the platforms.
However, the solution he provides has become obsolete since Xamarin Forms 2.3.4 was released. Device.OnPlatform has been redesigned as discussed in this discussion and implemented in this Pull Request.
The correct way to do this in Xamarin Forms 2.3.4 and onwards is by using Device.RuntimePlatform. Use a switch or conditional to suit your needs like so:
if(Device.RuntimePlatform == Device.iOS)
{
// iOS
}
else if(Device.RuntimePlatform == Device.Android)
{
// Android
}
It would be possible to do it like you asked, if you were to use a shared project instead of a PCL. Because when you use a shared project, you have access to the compiler directives of your platform projects.
You are using the conditionals in your PCL project which would not contain those compiler defines, thus why your conditional code is greyed out.
In your PCL project you can use Device.OnPlatform to perform platform based processing:
Device.OnPlatform (iOS: () => this.MyLabel.BackgroundColor = Color.Navy; );
re: https://developer.xamarin.com/api/member/Xamarin.Forms.Device.OnPlatform/
I downloaded a copy of the current Xamarin Forms master branch, compiled it, and then I added these compiled assemblies as references to a test project:
Xamarin.Forms.Core
Xamarin.Forms.Platform
Xamarin.Forms.Platform.Android
Xamarin.Forms.Xaml
The test project was created using the Visual Studio Xamarin Forms project template, the only thing I modified is the references in the Core.csproj and Android.csproj to point to the compiled assemblies.
I used the first 3 from the bin\debug\ folder of the Xamarin.Forms.Platform.Android project, and the last one from the Xamarin.Forms.Xaml bin\debug folder.
I run the test project, and it runs fine, I can see the label from the default generated code "Welcome to Xamarin Forms!"
Next, I just modified the MainPage like this:
public partial class App : Application
{
public App()
{
InitializeComponent();
MainPage = new NavigationPage(new ContentPage());
}
}
When I run the app, it gives me an error
System.ArgumentException: element is not of type Xamarin.Forms.View
Parameter name: element
thrown on this line:
void IVisualElementRenderer.SetElement(VisualElement element)
{
if (!(element is TElement))
throw new ArgumentException("element is not of type " + typeof(TElement), nameof(element));
SetElement((TElement)element);
}
which is strange.
The type of the element is Xamarin.Forms.NavigationPage and the stack trace is
Can someone help me running the test project with the compiled assemblies?
UPDATE #1:
The 2nd entry in the call stack shows that it's not able to get the registered renderer(NavigationPageRenderer) for the NavigationPage element and instead it's creating a default renderer(DefaultRenderer), which can't handle the type of element(NavigationPage) so it's throwing the exception I see.
So it appears that for NavigationPage, it doesn't find its renderer(NavigationPageRenderer) in the Registrar.
public static IVisualElementRenderer CreateRenderer(VisualElement element)
{
UpdateGlobalContext(element);
IVisualElementRenderer renderer = Registrar.Registered.GetHandler<IVisualElementRenderer>(element.GetType()) ?? new DefaultRenderer();
renderer.SetElement(element);
return renderer;
}
My feeling is there's a build step I'm not aware about when building Xamarin Forms.
Its crashing as you are calling InitializeComponent on something which doesn't derive from a Forms.Page (i.e. ContentPage etc).
The application itself is not a Page, if you had a page, lets call it 'MyCustomPage' which has some Xaml behind the class would look something like this:
public partial class MyCustomPage : ContentPage
{
public MyCustomPage()
{
InitializeComponent ();
// Some other setup...
}
}
Then in your App constructor you would call
MainPage = new MyCustomPage();
Since you are creating a blank content page from the root of your app, you do not need to call InitializeComponent.
Hope this helps.
You also need to reference
Xamarin.Forms.Platform.Android (Forwarders)
from your Android project.
I have a suite of UITest for our Xamarin Forms project. All of the AutomationId's are present in the XAML file and work fine on the iOS project. However when running the tests on Android the AutomationId is not there which is causing my tests to fail.
I've doubled checked using REPL and tree to inspect each view for it's Id's
Are you initializing the AutomationId's in the OnCreate of the MainActivity in the Android native project?
After the Xamarin.Forms.Forms.Init (this, bundle); :
Xamarin.Forms.Forms.ViewInitialized += (object sender, Xamarin.Forms.ViewInitializedEventArgs e) => {
if (!string.IsNullOrWhiteSpace (e.View.AutomationId)) {
e.NativeView.ContentDescription = e.View.AutomationId;
}
};
In android app build using Xamarin Forms, the automation id is converted to cont-desc. You can use cont-desc for your test.
There is no automationId itself visible in REPL, but only label or id with the value equal to that set on the automationId, so you should just use Marked passing in the value.