Visual studio 2015 未随Xamarin forms应用程序安装包

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，请帮助我如何修复此问题

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   

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您可能会为单个平台安装Nuget软件包

如果没有，请关闭Visual Studio并重新打开，它有时会解决您的问题。仍然存在同样的问题，请尝试更新Xamarin.Android.Support.v7.AppCompat&Xamarin.Forms Nuget软件包

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不要忘记为整个解决方案安装软件包。

是否需要运行Nuget软件包安装？这是Xamarin Studio还是Visual Studio？您可能尚未安装java SDK和android SDK&NDK。如果是Visual Studio，我可以帮助您进行安装。是的，我正在使用Visual Studio进行xamarin开发，如果您有任何链接，请共享链接。我也安装了java sdk，但仍然无法工作，上面列表中的一些包未完全安装。请指导我如何安装这些软件包？我正在尝试更新这两个软件包，但尚未安装。假设我正在尝试安装Xamarin.Android.Support.v7.AppCompat，它需要依赖的DLL。安装被关闭，出现异常。现在我再次尝试安装Xamarin.Android.Support.v7.AppCompat，但收到下面的错误消息**严重性代码说明项目文件行抑制状态错误无法安装程序包“Xamarin.Android.Support.v4 23.0.1.3”。您正试图将此软件包安装到以“.NETPortable，Version=v4.5，Profile=Profile259”为目标的项目中，但该软件包不包含任何与该框架兼容的程序集引用或内容文件。有关详细信息，请与软件包作者联系。0**查看以下链接