Android error APT0000: Attribute "..." has already been defined

[dtchepak]

Thanks for this sample and the accompanying blog post; I've gotten much closer to XamForms netstandard after finding it! :)

Just tried to build with VS2017 (Version 15.2 (26430.13) Release) with a fresh clone of the repo and get the error in the issue description (same error with my own project). Just wondering if this is due to recent VS/Xamarin updates, or if it is unique to my install. Here's a snippet of the output log:

...
2>    Processing: C:\dev\git\SampleXamFormsWithNetStandard\XamFormsSample\XamFormsSample.Droid\obj\Debug\__library_projects__\Xamarin.Android.Support.v7.MediaRouter\library_project_imports\res\values-uz-rUZ\values-uz-rUZ.xml
2>    Processing: C:\dev\git\SampleXamFormsWithNetStandard\XamFormsSample\XamFormsSample.Droid\obj\Debug\__library_projects__\Xamarin.Android.Support.v7.MediaRouter\library_project_imports\res\values-vi\values-vi.xml
2>    Processing: C:\dev\git\SampleXamFormsWithNetStandard\XamFormsSample\XamFormsSample.Droid\obj\Debug\__library_projects__\Xamarin.Android.Support.v7.MediaRouter\library_project_imports\res\values-zh-rCN\values-zh-rCN.xml
2>    Processing: C:\dev\git\SampleXamFormsWithNetStandard\XamFormsSample\XamFormsSample.Droid\obj\Debug\__library_projects__\Xamarin.Android.Support.v7.MediaRouter\library_project_imports\res\values-zh-rHK\values-zh-rHK.xml
2>    Processing: C:\dev\git\SampleXamFormsWithNetStandard\XamFormsSample\XamFormsSample.Droid\obj\Debug\__library_projects__\Xamarin.Android.Support.v7.MediaRouter\library_project_imports\res\values-zh-rTW\values-zh-rTW.xml
2>    Processing: C:\dev\git\SampleXamFormsWithNetStandard\XamFormsSample\XamFormsSample.Droid\obj\Debug\__library_projects__\Xamarin.Android.Support.v7.MediaRouter\library_project_imports\res\values-zu\values-zu.xml
2>    Processing: C:\dev\git\SampleXamFormsWithNetStandard\XamFormsSample\XamFormsSample.Droid\obj\Debug\__library_projects__\Xamarin.Android.Support.v7.RecyclerView\library_project_imports\res\values\values.xml
2>C:\dev\git\SampleXamFormsWithNetStandard\XamFormsSample\XamFormsSample.Droid\obj\Debug\__library_projects__\Xamarin.Android.Support.v7.RecyclerView\library_project_imports\res\values\values.xml(2): error APT0000:  Attribute "layoutManager" has already been defined
2>C:\dev\git\SampleXamFormsWithNetStandard\XamFormsSample\XamFormsSample.Droid\obj\Debug\__library_projects__\Xamarin.Android.Support.v7.RecyclerView\library_project_imports\res\values\values.xml(2): error APT0000:  Attribute "spanCount" has already been defined
2>C:\dev\git\SampleXamFormsWithNetStandard\XamFormsSample\XamFormsSample.Droid\obj\Debug\__library_projects__\Xamarin.Android.Support.v7.RecyclerView\library_project_imports\res\values\values.xml(2): error APT0000:  Attribute "reverseLayout" has already been defined
2>C:\dev\git\SampleXamFormsWithNetStandard\XamFormsSample\XamFormsSample.Droid\obj\Debug\__library_projects__\Xamarin.Android.Support.v7.RecyclerView\library_project_imports\res\values\values.xml(2): error APT0000:  Attribute "stackFromEnd" has already been defined
2>C:\dev\git\SampleXamFormsWithNetStandard\XamFormsSample\XamFormsSample.Droid\obj\Debug\__library_projects__\Xamarin.Android.Support.v7.MediaRouter\library_project_imports\res\values\values.xml(2): error APT0000:  Attribute "mediaRouteAudioTrackDrawable" has already been defined
2>C:\dev\git\SampleXamFormsWithNetStandard\XamFormsSample\XamFormsSample.Droid\obj\Debug\__library_projects__\Xamarin.Android.Support.v7.MediaRouter\library_project_imports\res\values\values.xml(2): error APT0000:  Attribute "mediaRouteButtonStyle" has already been defined
2>C:\dev\git\SampleXamFormsWithNetStandard\XamFormsSample\XamFormsSample.Droid\obj\Debug\__library_projects__\Xamarin.Android.Support.v7.MediaRouter\library_project_imports\res\values\values.xml(2): error APT0000:  Attribute "mediaRouteCloseDrawable" has already been defined
2>C:\dev\git\SampleXamFormsWithNetStandard\XamFormsSample\XamFormsSample.Droid\obj\Debug\__library_projects__\Xamarin.Android.Support.v7.MediaRouter\library_project_imports\res\values\values.xml(2): error APT0000:  Attribute "mediaRouteDefaultIconDrawable" has already been defined
2>C:\dev\git\SampleXamFormsWithNetStandard\XamFormsSample\XamFormsSample.Droid\obj\Debug\__library_projects__\Xamarin.Android.Support.v7.MediaRouter\library_project_imports\res\values\values.xml(2): error APT0000:  Attribute "mediaRoutePauseDrawable" has already been defined
2>C:\dev\git\SampleXamFormsWithNetStandard\XamFormsSample\XamFormsSample.Droid\obj\Debug\__library_projects__\Xamarin.Android.Support.v7.MediaRouter\library_project_imports\res\values\values.xml(2): error APT0000:  Attribute "mediaRoutePlayDrawable" has already been defined
...

Potentially relevant VS version info is:

VisualStudio.15.Release/15.2.0+26430.13
NuGet Package Manager   4.2.0
Visual Studio Tools for Universal Windows Apps   15.0.26430.06
Xamarin   4.5.0.486 (fec6f88)
Xamarin.Android SDK   7.3.1.2 (9dbc4c5)
Xamarin.iOS and Xamarin.Mac SDK   10.10.0.37 (ad35de4)