Error:The "GenerateJavaStubs" task failed unexpectedly

Question

after installing plugin.media library getting this error

Severity    Code    Description Project File    Line    Suppression State Error     The "GenerateJavaStubs" task failed unexpectedly. System.InvalidOperationException: There can be only one type with an [Application] attribute; found: ,at Xamarin.Android.Tasks.ManifestDocument.CreateApplicationElement(XElement manifest, String applicationClass, List`1 subclasses, List`1 selectedWhitelistAssemblies)at Xamarin.Android.Tasks.ManifestDocument.Merge(List`1 subclasses, List`1 selectedWhitelistAssemblies, String applicationClass, Boolean embed, String bundledWearApplicationName, IEnumerable`1 mergedManifestDocuments)at Xamarin.Android.Tasks.GenerateJavaStubs.Run(DirectoryAssemblyResolver res)at Xamarin.Android.Tasks.GenerateJavaStubs.Execute()at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute()at Microsoft.Build.BackEnd.TaskBuilder.<ExecuteInstantiatedTask>d__26.MoveNext() XamarinForms.QbChat.Android 

Answer 1

This plugin depends on https://github.com/jamesmontemagno/CurrentActivityPlugin

The Current Activity plugin adds an Application class to your Android project. Make sure there's only one Application class and attribute in your Android project.

Answer 2

Some plugins as plugin.media, DeviceInfo, CurrentActivity etc. are adding MainApplication.cs that contains MainActivity winch conflict with MainActivity that is already there.

To resolve delete MainApplication.cs.