“Linkassemblies”任务意外失败。xamarin.forms 3.4.0.1009999更新

在更新到xamarin.forms 3.4.0.1009999之后,当尝试以发布模式运行应用程序时,我得到以下错误- The "LinkAssemblies" Task Failed Unexpectedly

我已经搜索了这个错误,并在这个问题上看到了多个线程,但它们都是以前版本的xamarin,而非建议的解决方案似乎可以工作。

但我尝试过的是:

• 清除bin和obj文件夹,然后重建解决方案。
• 改变 linker behaviour (关闭它),这实际上是可行的,但是一个巨大的应用程序不是一个选项。
• 试着打扫建筑,而不是重建,这基本上是一样的,但值得一试,它以前为别人工作过。

• 从xamarin.android项目中删除并重新添加xamarin.forms包

  原木:

/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(5,5): Error MSB4018: The "LinkAssemblies" task failed unexpectedly.
Mono.Linker.MarkException: Error processing method: 'Android.Views.ScaleGestureDetector Xamarin.Forms.Platform.Android.GestureManager::InitializeScaleDetector()' in assembly: 'Xamarin.Forms.Platform.Android.dll' ---> Mono.Cecil.ResolutionException: Failed to resolve System.Void Android.Support.V4.View.ScaleGestureDetectorCompat::SetQuickScaleEnabled(Android.Views.ScaleGestureDetector,System.Boolean)
  at Mono.Linker.Steps.MarkStep.HandleUnresolvedMethod (Mono.Cecil.MethodReference reference) [0x00013] in <947dd92f52fa43c1922f96c7b9774bdc>:0 
  at Mono.Linker.Steps.MarkStep.MarkMethod (Mono.Cecil.MethodReference reference) [0x0004a] in <947dd92f52fa43c1922f96c7b9774bdc>:0 
  at Mono.Linker.Steps.MarkStep.MarkInstruction (Mono.Cecil.Cil.Instruction instruction) [0x00040] in <947dd92f52fa43c1922f96c7b9774bdc>:0 
  at Mono.Linker.Steps.MarkStep.MarkMethodBody (Mono.Cecil.Cil.MethodBody body) [0x00098] in <947dd92f52fa43c1922f96c7b9774bdc>:0 
  at Mono.Linker.Steps.MarkStep.ProcessMethod (Mono.Cecil.MethodDefinition method) [0x00162] in <947dd92f52fa43c1922f96c7b9774bdc>:0 
  at Mono.Linker.Steps.MarkStep.ProcessQueue () [0x0001b] in <947dd92f52fa43c1922f96c7b9774bdc>:0 
   --- End of inner exception stack trace ---
  at Mono.Linker.Steps.MarkStep.ProcessQueue () [0x00047] in <947dd92f52fa43c1922f96c7b9774bdc>:0 
  at Mono.Linker.Steps.MarkStep.ProcessPrimaryQueue () [0x0000a] in <947dd92f52fa43c1922f96c7b9774bdc>:0 
  at Mono.Linker.Steps.MarkStep.Process () [0x00102] in <947dd92f52fa43c1922f96c7b9774bdc>:0 
  at Mono.Linker.Steps.MarkStep.Process (Mono.Linker.LinkContext context) [0x0000d] in <947dd92f52fa43c1922f96c7b9774bdc>:0 
  at MonoDroid.Tuner.MonoDroidMarkStep.Process (Mono.Linker.LinkContext context) [0x0000b] in <947dd92f52fa43c1922f96c7b9774bdc>:0 
  at Mono.Linker.Pipeline.Process (Mono.Linker.LinkContext context) [0x0001c] in <947dd92f52fa43c1922f96c7b9774bdc>:0 
  at MonoDroid.Tuner.Linker.Run (Mono.Linker.Pipeline pipeline, Mono.Linker.LinkContext context) [0x00000] in <947dd92f52fa43c1922f96c7b9774bdc>:0 
  at MonoDroid.Tuner.Linker.Process (MonoDroid.Tuner.LinkerOptions options, Mono.Linker.ILogger logger, Mono.Linker.LinkContext& context) [0x00071] in <947dd92f52fa43c1922f96c7b9774bdc>:0 
  at Xamarin.Android.Tasks.LinkAssemblies.Execute (Java.Interop.Tools.Cecil.DirectoryAssemblyResolver res) [0x002d4] in <947dd92f52fa43c1922f96c7b9774bdc>:0 
  at Xamarin.Android.Tasks.LinkAssemblies.Execute () [0x0021f] in <947dd92f52fa43c1922f96c7b9774bdc>:0 
  at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute () [0x00023] in /Users/builder/jenkins/workspace/build-package-osx-mono/2018-06/external/bockbuild/builds/msbuild-15/src/Build/BackEnd/TaskExecutionHost/TaskExecutionHost.cs:573 
  at Microsoft.Build.BackEnd.TaskBuilder.ExecuteInstantiatedTask (Microsoft.Build.BackEnd.ITaskExecutionHost taskExecutionHost, Microsoft.Build.BackEnd.Logging.TaskLoggingContext taskLoggingContext, Microsoft.Build.BackEnd.TaskHost taskHost, Microsoft.Build.BackEnd.ItemBucket bucket, Microsoft.Build.BackEnd.TaskExecutionMode howToExecuteTask) [0x001f6] in /Users/builder/jenkins/workspace/build-package-osx-mono/2018-06/external/bockbuild/builds/msbuild-15/src/Build/BackEnd/Components/RequestBuilder/TaskBuilder.cs:784  (MSB4018) (LoyaltyWorx.Android)

我希望这个项目能像以前版本的xamarin.forms那样在设备上运行,而不必改变链接器的行为和显著增加应用程序的大小。