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Created attachment 25798 [details]
If you create a Forms project, using the latest release, that targets Android 6, a build error results.
This repos in both VSMac and VS2017 (both the latest stable releases). Sample attached (produced in VSMac)
1. Create a PCL-based Forms project.
2. Remove all the NuGet packages from the Android project.
3. Set the Android project to target Android 6.0. (It may then be necessary to close/re-open the solution.)
4. Add Forms 184.108.40.206635 to the Android project.
5. (optional) Update Forms in the PCL project.
6. Build the Android project.
Expected result: Project builds with zero errors.
Actual result: Projects fails to build, with one error:
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(2,2): Error: Exception while loading assemblies: System.IO.FileNotFoundException: Could not load assembly 'Xamarin.Android.Support.Fragment, Version=220.127.116.11, Culture=neutral, PublicKeyToken='. Perhaps it doesn't exist in the Mono for Android profile?
File name: 'Xamarin.Android.Support.Fragment.dll'
at Java.Interop.Tools.Cecil.DirectoryAssemblyResolver.Resolve (Mono.Cecil.AssemblyNameReference reference, Mono.Cecil.ReaderParameters parameters) [0x00099] in /Users/builder/data/lanes/5147/c2a33d8e/source/xamarin-android/external/Java.Interop/src/Java.Interop.Tools.Cecil/Java.Interop.Tools.Cecil/DirectoryAssemblyResolver.cs:220
at Java.Interop.Tools.Cecil.DirectoryAssemblyResolver.Resolve (Mono.Cecil.AssemblyNameReference reference) [0x00000] in /Users/builder/data/lanes/5147/c2a33d8e/source/xamarin-android/external/Java.Interop/src/Java.Interop.Tools.Cecil/Java.Interop.Tools.Cecil/DirectoryAssemblyResolver.cs:170
at Xamarin.Android.Tasks.ResolveAssemblies.AddAssemblyReferences (Java.Interop.Tools.Cecil.DirectoryAssemblyResolver resolver, System.Collections.Generic.ICollection`1[T] assemblies, Mono.Cecil.AssemblyDefinition assembly, System.Boolean topLevel) [0x0015c] in <593a6fd557984367bb21e275d0fa0659>:0
at Xamarin.Android.Tasks.ResolveAssemblies.Execute (Java.Interop.Tools.Cecil.DirectoryAssemblyResolver resolver) [0x0019c] in <593a6fd557984367bb21e275d0fa0659>:0 (test.Droid)
Xamarin.Android.Support.Fragment isn't compatible with Android 6.0, but compilation demands that library.
You need to use the 23.3.0 version of the support libraries if you are not using MonoAndroid70 or higher as your target framework. The 18.104.22.168 packages are not compatible with the older android frameworks.
Same problem. Using version 23.3.0 of the support libraries does not solve problem.
I'm re-opening this bug. The sample I attached to the original report already uses v23.3.0 of the support libs and doesn't build in VSMac (latest stable build).
Ok, we're updating the release notes to reflect this change.
In updating Maps and AppLinks to use the updated Firebase, the dependencies were bumped to Android Framework 7+ and Android Support Libraries 22.214.171.124.
Your projects may still target the same APIs as they do presently.
So for the provided solution project I updated the Android Framework to 7.0 and updated the Android Support Libraries to 126.96.36.199, and I've confirmed it builds and runs successfully.