xamarin.android - Xamarin Android Build Errors After Adding MvvmCross.Plugins.Fingerprint Package 2.1.3

Question

I need help. Again and again.

My app was building and running fine after migrating to AndroidX. I need to implement Biometrics, so I installed MvvmCross.Plugins.Fingerprint. Now I get 3 errors:

1. 'Mvx' does not contain a definition for 'Warning' (CS0117)
2. 'Resource' does not contain a definition for 'Layout' (CS0117)
3. 'Resource.Id' does not contain a definition for 'text1' (CS0117)

I'm going to post this on the GitHub page for the package too.

I googled all of errors, but nothing looks promising.

Thanks! Larry

question from:https://stackoverflow.com/questions/65893918/xamarin-android-build-errors-after-adding-mvvmcross-plugins-fingerprint-package

Answer 1

The issue is most likely that the plugin is targeting MvvmCross 6.0.0, while you are on 7.x.x since you are mentioning AndroidX.

The MvvmCross.Plugins.Fingerprint package doesn't much else than just registering the Fingerprint in the IoC container for you.

So instead try just adding the Plugin.Fingerprint package to your project. Then in Setup.cs you can register this yourself in a override of InitializeLastChance or any other relevant lifecycle method there:

protected override void InitializeLastChance()
{
    base.InitializeLastChance();

    Mvx.IoCProvider.LazyConstructAndRegisterSingleton(() => CrossFingerprint.Current);
}

Now you can resolve IFingerprint in your ViewModels.