我使用了visual studio2019，我创建了一个Android绑定库（Xamarin）解决方案并将我的项目aar文件添加到Jars文件夹中，然后清理并构建该解决方案。成功构建并生成dll文件，但我收到有关aar文件类的一些警告，
1>"E:\xamarin apps\ClassLibrary1\ClassLibrary1\ClassLibrary1.csproj" (Rebuild;BuiltProjectOutputGroup;BuiltProjectOutputGroupDependencies;DebugSymbolsProjectOutputGroup;DebugSymbolsProjectOutputGroupDependencies;DocumentationProjectOutputGroup;DocumentationProjectOutputGroupDependencies;SatelliteDllsProjectOutputGroup;SatelliteDllsProjectOutputGroupDependencies;SGenFilesOutputGroup;SGenFilesOutputGroupDependencies target) (1) ->
1>(GenerateBindings target) ->
1> BINDINGSGENERATOR : warning BG8604: top ancestor LoginActivity not found for nested type Com.Aarproject.LoginActivity.1.
1> BINDINGSGENERATOR : warning BG8604: top ancestor SignupActivity not found for nested type Com.Aarproject.SignupActivity.1.
1> BINDINGSGENERATOR : warning BG8604: top ancestor SplashActivity not found for nested type Com.Aarproject.SplashActivity.1.
1>
1>
1>"E:\xamarin apps\ClassLibrary1\ClassLibrary1\ClassLibrary1.csproj" (Rebuild;BuiltProjectOutputGroup;BuiltProjectOutputGroupDependencies;DebugSymbolsProjectOutputGroup;DebugSymbolsProjectOutputGroupDependencies;DocumentationProjectOutputGroup;DocumentationProjectOutputGroupDependencies;SatelliteDllsProjectOutputGroup;SatelliteDllsProjectOutputGroupDependencies;SGenFilesOutputGroup;SGenFilesOutputGroupDependencies target) (1) ->
1>(CoreCompile target) ->
1> E:\xamarin apps\ClassLibrary1\ClassLibrary1\obj\Release\generated\src\Com.Aarproject.BuildConfig.cs(44,59,44,67): warning CS0109: The member 'BuildConfig._members' does not hide an accessible member. The new keyword is not required.
1> E:\xamarin apps\ClassLibrary1\ClassLibrary1\obj\Release\generated\src\Com.Aarproject.BuildConfig.cs(45,30,45,39): warning CS0109: The member 'BuildConfig.class_ref' does not hide an accessible member. The new keyword is not required.
1>
1> 5 Warning(s)
1> 0 Error(s)
1>
此外，我在“引用”下的另一个Mobile Android App（Xamarin）中使用了dll文件，但无法访问我的库类（如LoginActivity，SplashActivity ..）。 我该如何访问它，库和Android应用解决方案都具有相同的目标版本28。
注意：aar文件项目也具有相同的版本。