软件包没有与Xamarin表单应用程序安装

Question

我已经安装了Xamarin表单，当我尝试运行应用程序时，这些缺少的DLL正在显示，请帮助我如何解决此问题。

Severity Code Description Project File Line Suppression State 
Error  Please install package: 'Xamarin.Android.Support.Vector.Drawable' available in SDK installer. Android resource directory C:\Users\gurpreet\AppData\Local\Xamarin\Xamarin.Android.Support.Vector.Drawable\23.3.0.0\content\./ doesn't exist. App1.Droid   
Error  Please install package: 'Xamarin.Android.Support.v7.CardView' available in SDK installer. Android resource directory C:\Users\gurpreet\AppData\Local\Xamarin\Xamarin.Android.Support.v7.CardView\23.3.0.0\content\./ doesn't exist. App1.Droid   
Error  Please install package: 'Xamarin.Android.Support.Animated.Vector.Drawable' available in SDK installer. Java library file C:\Users\gurpreet\AppData\Local\Xamarin\Xamarin.Android.Support.Animated.Vector.Drawable\23.3.0.0\content\classes.jar doesn't exist. App1.Droid   
Error  Please install package: 'Xamarin.Android.Support.v7.RecyclerView' available in SDK installer. Android resource directory C:\Users\gurpreet\AppData\Local\Xamarin\Xamarin.Android.Support.v7.RecyclerView\23.3.0.0\content\./ doesn't exist. App1.Droid   
Error  Please install package: 'Xamarin.Android.Support.v7.MediaRouter' available in SDK installer. Java library file C:\Users\gurpreet\AppData\Local\Xamarin\Xamarin.Android.Support.v7.MediaRouter\23.3.0.0\content\classes.jar doesn't exist. App1.Droid   
Error  Please install package: 'Xamarin.Android.Support.v7.RecyclerView' available in SDK installer. Java library file C:\Users\gurpreet\AppData\Local\Xamarin\Xamarin.Android.Support.v7.RecyclerView\23.3.0.0\content\classes.jar doesn't exist. App1.Droid   
Error  Please install package: 'Xamarin.Android.Support.Vector.Drawable' available in SDK installer. Java library file C:\Users\gurpreet\AppData\Local\Xamarin\Xamarin.Android.Support.Vector.Drawable\23.3.0.0\content\classes.jar doesn't exist. App1.Droid   
Error  Please install package: 'Xamarin.Android.Support.Design' available in SDK installer. Android resource directory C:\Users\gurpreet\AppData\Local\Xamarin\Xamarin.Android.Support.Design\23.3.0.0\content\./ doesn't exist. App1.Droid   
Error  Please install package: 'Xamarin.Android.Support.v7.CardView' available in SDK installer. Java library file C:\Users\gurpreet\AppData\Local\Xamarin\Xamarin.Android.Support.v7.CardView\23.3.0.0\content\classes.jar doesn't exist. App1.Droid   
Error  Please install package: 'Xamarin.Android.Support.Design' available in SDK installer. Java library file C:\Users\gurpreet\AppData\Local\Xamarin\Xamarin.Android.Support.Design\23.3.0.0\content\classes.jar doesn't exist. App1.Droid   
Error  Please install package: 'Xamarin.Android.Support.v7.AppCompat' available in SDK installer. Android resource directory C:\Users\gurpreet\AppData\Local\Xamarin\Xamarin.Android.Support.v7.AppCompat\23.3.0.0\content\./ doesn't exist. App1.Droid   
Error  Please install package: 'Xamarin.Android.Support.v7.MediaRouter' available in SDK installer. Android resource directory C:\Users\gurpreet\AppData\Local\Xamarin\Xamarin.Android.Support.v7.MediaRouter\23.3.0.0\content\./ doesn't exist. App1.Droid   
Error  Please install package: 'Xamarin.Android.Support.v4' available in SDK installer. Java library file C:\Users\gurpreet\AppData\Local\Xamarin\Xamarin.Android.Support.v4\23.3.0.0\content\libs/internal_impl-23.3.0.jar doesn't exist. App1.Droid   
Error  Please install package: 'Xamarin.Android.Support.v4' available in SDK installer. Java library file C:\Users\gurpreet\AppData\Local\Xamarin\Xamarin.Android.Support.v4\23.3.0.0\content\classes.jar doesn't exist. App1.Droid   
Error  Please install package: 'Xamarin.Android.Support.v4' available in SDK installer. Android resource directory C:\Users\gurpreet\AppData\Local\Xamarin\Xamarin.Android.Support.v4\23.3.0.0\content\./ doesn't exist. App1.Droid   
Error  Please install package: 'Xamarin.Android.Support.v7.MediaRouter' available in SDK installer. Java library file C:\Users\gurpreet\AppData\Local\Xamarin\Xamarin.Android.Support.v7.MediaRouter\23.3.0.0\content\libs/internal_impl-23.3.0.jar doesn't exist. App1.Droid   
Error  Please install package: 'Xamarin.Android.Support.v7.AppCompat' available in SDK installer. Java library file C:\Users\gurpreet\AppData\Local\Xamarin\Xamarin.Android.Support.v7.AppCompat\23.3.0.0\content\classes.jar doesn't exist. App1.Droid   
Error  Unable to resolve dependencies. 'Xamarin.Android.Support.v7.AppCompat 24.2.1' is not compatible with 'Xamarin.Android.Support.Design 24.2.1 constraint: Xamarin.Android.Support.v7.AppCompat (= 24.2.1)', 'Xamarin.Android.Support.v7.MediaRouter 24.2.1 constraint: Xamarin.Android.Support.v7.AppCompat (= 24.2.1)', 'Xamarin.Forms 2.3.3.175 constraint: Xamarin.Android.Support.v7.AppCompat (= 23.3.0)'.   0 

Answer 1

您可能会安装Nuget适用于各个平台的软件包。

如果没有，关闭你的Visual Studio并重新打开，它有时会解决你的问题。仍然得到相同的问题，然后尝试更新“Xamarin.Android.Support.v7.AppCompat”&“Xamarin.Forms”Nuget包。

不要忘记为整个解决方案“安装软件包”。