cannot access ListenableFuture

[Abesoddy]

Hello,

I have this error on the project Xamarin.Froms.Android with version 4.0.3 :

Error: error: cannot access ListenableFuture public class ScheduledNotificationWorker class file for com.google.common.util.concurrent.ListenableFuture not found

Does this come from the plugin or an implementation error?

[thudugala]

Can you please attach a sample project?

Also try enabling Multi-Dex

This error is coming for Plugin dependency Xamarin.Android.Arch.Work.Runtime

[tranb3r]

@thudugala @Abesoddy

I'm having the same build error when attempting to build the sample project (Nuget) for Android.

However, the error only appears when using visual studio preview:

• with Visual Studio 2019 16.1.4 (xamarin sdk 9.3.0.23): no error on build
• with Visual Studio 2019 16.2.0 preview 3.0 (xamarin sdk 9.4.0.4): build error (cannot access ListenableFuture).

Any idea for fixing it ? Is it related to a known issue in the VS preview ? Is there a workaround ? Or maybe this is something new that should be reported to the VS team ?

It could be worth re-opening this issue until we have a full resolution.

[tranb3r]

Any progress on that one ?

[tranb3r]

Same issue with the new preview: Visual Studio 2019 16.2.0 preview 4.0 (xamarin android sdk 9.4.0.51)

[thudugala]

@tranb3r Can you try referencing Xamarin.Android.Arch.Work.Runtime in your android project ?

[tranb3r]

@tranb3r Can you try referencing Xamarin.Android.Arch.Work.Runtime in your android project ?

Same error (tested with the sample project (nuget)).

[pikausp]

Possibly related to dotnet/android#3343?

[thudugala]

https://docs.microsoft.com/en-nz/xamarin/android/release-notes/9/9.4#known-issues-in-xamarinandroid-94051

Workaround:
Add the following lines to the bottom of your app project's .csproj file (just before the closing tag):

<Target Name="FixGuava" AfterTargets="_AddAndroidCustomMetaData">
  <ItemGroup>
    <_MonoAndroidReferencePath Include="@(_ReferencePath);@(_ReferenceDependencyPaths)" Condition=" '%(Filename)' == 'Xamarin.Google.Guava.ListenableFuture' " />
  </ItemGroup>
</Target>

[thudugala]

Issue seems to be fixed in VS 16.2.1 (Xamarin.Android 9.4.1.0)