Xamarin 'Resource.Layout' does not contain a definition for 'Tabbar' error

Question

I've created a basic xamarin.forms project (with PCL code sharing strategy) and I'm getting error for the following two lines in MainActivity::OnCreate()

TabLayoutResource = Resource.Layout.Tabbar;
ToolbarResource = Resource.Layout.Toolbar;

CS0117 'Resource.Layout' does not contain a definition for 'Tabbar'
CS0117 'Resource.Layout' does not contain a definition for 'Toolbar'

The resource files exist as Resources\layout\Tabbar.axml and Resources\layout\Toolbar.axml and the build action for both of them is set to AndroidResource.

I suspect there is something wrong with my android SDK installation. Currently the following packages are installed:

But the Run button in Visual Studio 2015 still is showing Android 6.0 API 23 and it's not possible to change it:

I've also set the Target Framework version of the Android project to 7.1:

The project structure is as the following:

I've followed this tutorial step by step to create the sample project.

How can I get the error fixed?

can you provide the sample project ? That will tell us if the problem is your project or environment — Yuri S, Jul 29 '17 at 20:37
@YuriS Updated the question with a snapshot of project structure and a link to the tutorial source code. Note that even a starter `xamarin.forms` template project gives this error and it's not related to the tutorial I've followed. — B Faley, Jul 29 '17 at 20:42
do you want me to take a look on your machine using teamviewer? — Yuri S, Jul 29 '17 at 20:44
Let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/150497/discussion-between-yuri-s-and-meysam). — Yuri S, Jul 29 '17 at 20:47

score 5 · Accepted Answer · answered Jul 29 '17 at 23:39

The problem seems in API installed. It is still a little mystery for me which APIs must be installed but deleting the build tools 24 and installing build tools 26.0.1 fixed the issue for build.

Then installed NDK which was missing and set path in Xamarin options. Now 2 options are available for computers supporting HAXM and/or Hyper-V

HAXM. Disable Hyper-V. Then change emulator setting in AVD manager which were not created and download an Itom image for emulator using Android SDK. Download and install HAXM. You are ready.
Enable Hyper-V. Download and install Hyper-V VS emulators. Run it and create emulator(s) virtual machine(s). You are ready.

Run your app.

Did not help for me. Running Visual Studio Mac 2017. – Le Mot Juiced Mar 10 '19 at 13:32 — Le Mot Juiced, Mar 10 '19 at 13:32

score 1 · Answer 2 · answered Mar 01 '20 at 15:14

1

This happened to me when I included two files into "layout" folder: Tabbar.axml and Toolbar.axml. Following the Xamarin documentation at: https://learn.microsoft.com/en-us/xamarin/xamarin-forms/platform/android/appcompat-material-design

I solved the problem just right clicking in those files, selecting Properties and changing the Build Action to AndroidResource.

answered Mar 01 '20 at 15:14

Sérgio Damasceno

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When you include a file in layout folder, VS adds the xml extension and the Build Action is AndroidResource. If you change the extension to axml, the Build Action is changed to Content. That´s the problem! – Sérgio Damasceno Mar 01 '20 at 15:26

Xamarin 'Resource.Layout' does not contain a definition for 'Tabbar' error

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