AXML attributes not declared - Xamarin Android

Question

I'm working on a VS2017 Enterprise Xamarin Android project and I'm using AXML designer to design my activities. I get a lot of messages as you see below, many standard attributes are not declared.

I tried:

• https://stackoverflow.com/a/42132223/5786039 and its 6th comment.
• Changing my Android-SDK from 23 to 19 and 14.
• Updating my JDK from 7 to 8.
• Reinstalling Xamarin tools.

I'm using Windows 10 Enterprise by the way.

Answer 1

1. Create any folder in your pc, copy android-layout-xml.xsd and schemas.android.com.apk.res.android.xsd to this folder.

2. Open your project->open xml menu->schemas->remove the two items in below image:

3. Reference the two downloaded files to your schema.

Notes: it will temporarily fix the designer error. but it will disable some of the auto-filling intellisense functionality (ex: auto-fill of @+id/). And reopen your axml with designer will also lead to auto-reference of the old xsd files.

So considering the above truths. I would suggest you use Android studio to finish the layout codes, then copy it to Visual Studio or use Xamarin Studio if you have a Mac. These errors won't have any impact on building/compilation of your project.