Workstation.MobileHmi.Droid project compilation errors

[abrasat]

I am trying to compile the new version but am getting lots of errors like:

... Please install package: 'Xamarin.Android.Support.v7.CardView' available in SDK installer. Android resource directory C:\Users*\AppData\Local\Xamarin\Xamarin.Android.Support.v7.CardView\23.3.0.0\content./ doesn't exist. ... Please install package: 'Xamarin.Android.Support.Vector.Drawable' available in SDK installer. Java library file C:\Users*\AppData\Local\Xamarin\Xamarin.Android.Support.Vector.Drawable\23.3.0.0\content\classes.jar doesn't exist. ... Please install package: 'Xamarin.Android.Support.v4' available in SDK installer. Android resource directory C:\Users***\AppData\Local\Xamarin\Xamarin.Android.Support.v4\23.3.0.0\content./ doesn't exist.

... and so on.

I installed these packages manually from the nuget server, but the error messages are still generated ... Why are these packages reported as missing, respectively why are they searched into the c:\users... folder ?

[awcullen]

I am just learning about Xamarin as well. To get the SDK for Xamarin Android support, I chose Tools...Android...Android SDK Manager. Then I installed the following items:

[awcullen]

Next I created an Android Virtual Device (emulator). I chose Tools...Android...Android Emulator Manager:

I selected the Nexus 4 by Google and clicked Create AVD...

I filled out the form as shown:

[abrasat]

After downloading the OPC-UA samples and trying to compile the projects from the solution with VS 2015, the following errors occur: ... The package Microsoft.CSharp with version 4.0.1 could not be found in C:\Users\Andrew.nuget\packages. Run a NuGet package restore to download the package. Workstation.Common.Uwp
... Your project is not referencing the "MonoAndroid,Version=v6.0" framework. Add a reference to "MonoAndroid,Version=v6.0" in the "frameworks" section of your project.json, and then re-run NuGet restore. Workstation.MobileHmi.Droid
...

The project.json file in the "Workstation.Common.Uwp" project seems to contain some references to directories from your development environment ("C:\Users\Andrew...").

In the project.json file from the "Workstation.MobileHmi.Droid" project seems that some references (MonoAndroid) are missing.

Later edit: I solved the above issues by deleting some cached zip files in the the user local files Directory on my computer, and by manually adding some missing packages.

But now I have a new problem, the android project Workstation.MobileHmi.Droid does not compile with the apparently "classic" well-known Xamarin-Forms issue (I googled after it) : .... "The name InitializeComponent does not exist in this context" ...

This compiler error occurs only with the new version of opc-ua sample, where Workstation.MobileHmi is a shared project. I tried different workarounds described in xamarin forums or on stackoverflow, but could not get rid of the compiler error. When using the opc-ua samples version from december where Workstation.MobileHmi is a PCL project, the android project is compiled without errors and can also be executed. Do you have this issue when using the shared project ?

[awcullen]

To help fix the first part of the question: I removed the project.lock.json from the repo. This file is recreated if necessary when the project is rebuilt. I lowerer the target Android API to 23 and MonoAndroid to v6.0, which are more commonly installed.

Regarding the last Xamarin Forms error: Please check the properties of the MainPage.xaml in the shared project. The Build Action is 'Embedded Resource' and the Custom Tool is 'MSBuild:UpdateDesignTimeXaml'. Then restart Visual Studio.

[abrasat]

Thanks, I will look into that, but probably first in a couple of days. Do you have the RobotHmi sample also as a Xamarin/Android version ? If yes, could you please add it to the repository of samples?

[awcullen]

I'm working on it. https://urho3d.github.io/