Visual Studio 2019 16.5.0 preview 2.0 requires android sdk build-tools 28.0.3

[tranb3r]

Steps to Reproduce

Create a default native android app using Xamarin.
Set Target Framework version to 10.0.
Build.
If you only have build tools v29+ installed, VS will stop building with an error.

Expected Behavior

Should build successfully and use sdk build tools v29.0.2

Actual Behavior

VS stops building with an error:

Project 'Test.Droid' requires the following components installed on your machine: 
Android SDK Build-Tools 28.0.3

Version Information

Visual Studio 2019 16.5.0 preview 2.0

[gugavaro]

@dellis1972 have you seen this before?

[dellis1972]

@tranb3r the dependences are per project. Can you run the following command
msbuild <proj.csproj> /t:GetAndroidDependencies /v:diag and return the results.

you should see something like this

Task "CalculateProjectDependencies" (TaskId:12)
  Task Parameter:TargetFrameworkVersion=v9.0 (TaskId:12)
  Task Parameter:ManifestFile=/Users/dean/Projects/Blank-Forms/Blank-Forms.Android/Properties/AndroidManifest.xml (TaskId:12)
  Task Parameter:BuildToolsVersion=28.0.3 (TaskId:12)
  Task Parameter:PlatformToolsVersion=28.0.0 (TaskId:12)
  Task Parameter:ToolsVersion=26.1.1 (TaskId:12)
  Task Parameter:NdkVersion=16.1 (TaskId:12)
  Task Parameter:NdkRequired=False (TaskId:12)
  Output Item(s): 
      AndroidDependency=
          platforms/android-28
          build-tools/28.0.3
                  Version=28.0.3
          platform-tools
                  Version=28.0.0
          tools
                  Version=26.1.1 (TaskId:12)
Done executing task "CalculateProjectDependencies". (TaskId:12)

[dellis1972]

Our defaults are also being changed via this PR #4012

[dellis1972]

if you want to force a particular version you can set the AndroidSdkBuildToolsVersion property.

[tranb3r]

Here is the result of msbuild <proj.csproj> /t:GetAndroidDependencies /v:diag

Task "CalculateProjectDependencies" (TaskId:11)
  Task Parameter:TargetFrameworkVersion=v10.0 (TaskId:11)
  Task Parameter:ManifestFile=D:\Dev\Temp\TestVSAndroidSDK\TestVSAndroidSDK\Properties\AndroidManifest.xml (TaskId:11)
  Task Parameter:BuildToolsVersion=28.0.3 (TaskId:11)
  Task Parameter:PlatformToolsVersion=28.0.0 (TaskId:11)
  Task Parameter:ToolsVersion=26.1.1 (TaskId:11)
  Task Parameter:NdkVersion=16.1 (TaskId:11)
  Task Parameter:NdkRequired=False (TaskId:11)
  Output Item(s):
      AndroidDependency=
          platforms/android-29
          build-tools/28.0.3
                  Version=28.0.3
          platform-tools
                  Version=28.0.0
          tools
                  Version=26.1.1 (TaskId:11)
Done executing task "CalculateProjectDependencies". (TaskId:11)

When building from visual studio, it will fail if build-tools 28.0.3 are not installed.

Project 'Test.Droid' requires the following components installed on your machine: 
Android SDK Build-Tools 28.0.3

However, when building from the command line ( msbuild <proj.csproj> ), it seems to use whatever build-tools version is installed:

VectorDrawableCheckBuildToolsVersionTask:
  Checking Android SDK Build-tools version...
  Selected Android SDK Build Tools Path: d:\android\sdk\build-tools\29.0.2\
  Selected Android SDK Build Tools Version: 29.0.2
  Android SDK Build Tools Version: 29.0.2 meets minimum requirements for Vector Drawables. OK.
  Finished Checking Android SDK Build-tools version.

So it's not clear which version is actually used when both 28.0.3 and 29.0.2 are installed.

Should I assume that this will be fixed in the next preview of visual studio ?

[jpobst]

This is likely obsolete as we have not had any recent reports on currently supported versions.