Xamarin Forms error

Question

Good afternoon Personal,

I am trying to compile my project in Xamarin Forms and this giving error:

Gravidade   Código  Descrição   Projeto Arquivo Linha   Estado de Supressão
Erro        ***Falha inesperada da tarefa "Aapt".***
System.AggregateException: Um ou mais erros. ---> System.FormatException: A cadeia de caracteres de entrada não estava em um formato correto.
   em System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal)
   em System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info)
   em Xamarin.Android.Tasks.ManifestDocument.CalculateVersionCode(String currentAbi, String versionCodePattern, String versionCodeProperties)
   em Xamarin.Android.Tasks.Aapt.GenerateCommandLineCommands(String ManifestFile, String currentAbi, String currentResourceOutputFile)
   em Xamarin.Android.Tasks.Aapt.DoExecute(ITaskItem manifestFile, ParallelLoopState state, Int32 loop)
   em System.Threading.Tasks.Parallel.<>c__DisplayClass30_0`2.<ForEachWorker>b__3(Int32 i, ParallelLoopState state, TLocal local)
   em System.Threading.Tasks.Parallel.<>c__DisplayClass17_0`1.<ForWorker>b__1()
   em System.Threading.Tasks.Task.InnerInvoke()
   em System.Threading.Tasks.Task.InnerInvokeWithArg(Task childTask)
   em System.Threading.Tasks.Task.<>c__DisplayClass176_0.<ExecuteSelfReplicating>b__0(Object )
   --- Fim do rastreamento de pilha de exceções internas ---
   em System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions)
   em System.Threading.Tasks.Task.Wait(Int32 millisecondsTimeout, CancellationToken cancellationToken)
   em System.Threading.Tasks.Task.Wait()
   em System.Threading.Tasks.Parallel.ForWorker[TLocal](Int32 fromInclusive, Int32 toExclusive, ParallelOptions parallelOptions, Action`1 body, Action`2 bodyWithState, Func`4 bodyWithLocal, Func`1 localInit, Action`1 localFinally)
   em System.Threading.Tasks.Parallel.ForEachWorker[TSource,TLocal](TSource[] array, ParallelOptions parallelOptions, Action`1 body, Action`2 bodyWithState, Action`3 bodyWithStateAndIndex, Func`4 bodyWithStateAndLocal, Func`5 bodyWithEverything, Func`1 localInit, Action`1 localFinally)
   em System.Threading.Tasks.Parallel.ForEachWorker[TSource,TLocal](IEnumerable`1 source, ParallelOptions parallelOptions, Action`1 body, Action`2 bodyWithState, Action`3 bodyWithStateAndIndex, Func`4 bodyWithStateAndLocal, Func`5 bodyWithEverything, Func`1 localInit, Action`1 localFinally)
   em System.Threading.Tasks.Parallel.ForEach[TSource,TLocal](IEnumerable`1 source, ParallelOptions parallelOptions, Func`1 localInit, Func`4 body, Action`1 localFinally)
   em Xamarin.Android.Tasks.Aapt.Execute()
   em Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute()
   em Microsoft.Build.BackEnd.TaskBuilder.<ExecuteInstantiatedTask>d__26.MoveNext()
---> (Exceção Interna N° 0) System.FormatException: A cadeia de caracteres de entrada não estava em um formato correto.
   em System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal)
   em System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info)
   em Xamarin.Android.Tasks.ManifestDocument.CalculateVersionCode(String currentAbi, String versionCodePattern, String versionCodeProperties)
   em Xamarin.Android.Tasks.Aapt.GenerateCommandLineCommands(String ManifestFile, String currentAbi, String currentResourceOutputFile)
   em Xamarin.Android.Tasks.Aapt.DoExecute(ITaskItem manifestFile, ParallelLoopState state, Int32 loop)
   em System.Threading.Tasks.Parallel.<>c__DisplayClass30_0`2.<ForEachWorker>b__3(Int32 i, ParallelLoopState state, TLocal local)
   em System.Threading.Tasks.Parallel.<>c__DisplayClass17_0`1.<ForWorker>b__1()
   em System.Threading.Tasks.Task.InnerInvoke()
   em System.Threading.Tasks.Task.InnerInvokeWithArg(Task childTask)
   em System.Threading.Tasks.Task.<>c__DisplayClass176_0.<ExecuteSelfReplicating>b__0(Object )<---  AppRDVAUX.Android

Someone could help me solve?

@edit

2>    AdditionalAndroidResourcePaths:  (TaskId:495)

2> Libraryprojectjars: (Taskid:495) 2> Extraargs: --no-version-Vectors (Taskid:495) 2> Createpackageperabi: False (Taskid:495) 2> ResourceNameCaseMap: layout\Tabbar.axml|layout\tabbar.xml;layout\Toolbar.axml|layout\toolbar.xml;drawable\LogoAntigoAraguaina.png|drawable\logoantigoaraguaina.png;drawable\DevByAcesso.png|drawable\devbyacesso.png;drawable\IconAraguaina.png|drawable\iconaraguaina.png;drawable Araguaina240360.jpg|drawable araguaina240360.jpg; (Taskid:495) 2> Versioncodepattern: {Abi}{versionCode:D5} (Taskid:495) 2> Versioncodeproperties: (Taskid:495) 2>C: Program Files (x86) Microsoft Visual Studio 2017 Enterprise Msbuild Xamarin Android Xamarin.Android.Common.targets(1942,3): error MSB4018: Unexpected "Aapt" task failure. 2>C: Program Files (x86) Microsoft Visual Studio 2017 Enterprise Msbuild Xamarin Android Xamarin.Android.Common.targets(1942,3): error MSB4018: System.Aggregateexception: One or more errors. ---> System.Formatexception: The input string was not in a correct format.

Answer 1

I believe the mistake is not related to the Java version, SDK or its image features as suggested in the comments...

You must have changed the properties of the android project. Specifically the field Version Number must have invalid content, which cannot be converted to numeric.

System.Aggregateexception: One or more errors. --> System.Formatexception: Input string was not in a correct format. ... in Xamarin.Android.Tasks.Manifestdocument.Calculateversioncode(String currentAbi, String versionCodePattern, String versionCodeProperties)

I think his intention was to alter the Version Name.

Give a check there on the project properties or on manifest and fix that which re-compiles.

I hope this helps.