我在Visual Studio 2017中创建了一个全新的Xamarin.Android项目。我立即构建了该解决方案并将其部署到Android Emulator，一切正常。
然后我安装了Microsoft.Azure.Mobile.Client v4.0.2 Nuget软件包，当我尝试构建解决方案时，现在出现以下错误：
java.lang.IllegalArgumentException: already added : Landroid/support/v4/accessibilityservice/AccessibilityServiceInfoCompat;
“输出”窗口包含以下内容：
1>------ Rebuild All started: Project: TestAzure3, Configuration: Debug Any CPU ------
1> TestAzure3 -> D:\Visual Studio 2017 Projects\TestAzure3\TestAzure3\bin\Debug\TestAzure3.dll
1>C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2152,3): warning : Duplicate managed type found! Mappings between managed types and Java types must be unique. First Type: 'Android.Support.V4.View.ViewPager+IOnPageChangeListenerImplementor, Xamarin.Android.Support.Core.UI, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'; Second Type: 'Android.Support.V4.View.ViewPager+IOnPageChangeListenerImplementor, Xamarin.Android.Support.v4, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
1>C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2152,3): warning : References to the type 'Android.Support.V4.View.ViewPager.IOnPageChangeListenerImplementor' will refer to 'Android.Support.V4.View.ViewPager+IOnPageChangeListenerImplementor, Xamarin.Android.Support.Core.UI, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
1>C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2152,3): warning : Duplicate managed type found! Mappings between managed types and Java types must be unique. First Type: 'Android.Support.V4.Widget.NestedScrollView+IOnScrollChangeListenerImplementor, Xamarin.Android.Support.Core.UI, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'; Second Type: 'Android.Support.V4.Widget.NestedScrollView+IOnScrollChangeListenerImplementor, Xamarin.Android.Support.v4, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
1>C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2152,3): warning : References to the type 'Android.Support.V4.Widget.NestedScrollView.IOnScrollChangeListenerImplementor' will refer to 'Android.Support.V4.Widget.NestedScrollView+IOnScrollChangeListenerImplementor, Xamarin.Android.Support.Core.UI, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
1>C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2152,3): warning : Duplicate managed type found! Mappings between managed types and Java types must be unique. First Type: 'Android.Support.V4.Widget.SwipeRefreshLayout+IOnRefreshListenerImplementor, Xamarin.Android.Support.Core.UI, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'; Second Type: 'Android.Support.V4.Widget.SwipeRefreshLayout+IOnRefreshListenerImplementor, Xamarin.Android.Support.v4, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
1>C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2152,3): warning : References to the type 'Android.Support.V4.Widget.SwipeRefreshLayout.IOnRefreshListenerImplementor' will refer to 'Android.Support.V4.Widget.SwipeRefreshLayout+IOnRefreshListenerImplementor, Xamarin.Android.Support.Core.UI, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
1>C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2152,3): warning : Duplicate managed type found! Mappings between managed types and Java types must be unique. First Type: 'Android.Support.V4.App.FragmentManager+IOnBackStackChangedListenerImplementor, Xamarin.Android.Support.Fragment, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'; Second Type: 'Android.Support.V4.App.FragmentManager+IOnBackStackChangedListenerImplementor, Xamarin.Android.Support.v4, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
1>C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2152,3): warning : References to the type 'Android.Support.V4.App.FragmentManager.IOnBackStackChangedListenerImplementor' will refer to 'Android.Support.V4.App.FragmentManager+IOnBackStackChangedListenerImplementor, Xamarin.Android.Support.Fragment, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
1>C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2152,3): warning : Duplicate managed type found! Mappings between managed types and Java types must be unique. First Type: 'Android.Support.V4.Content.Loader+IOnLoadCanceledListenerImplementor, Xamarin.Android.Support.Core.Utils, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'; Second Type: 'Android.Support.V4.Content.Loader+IOnLoadCanceledListenerImplementor, Xamarin.Android.Support.v4, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
1>C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2152,3): warning : References to the type 'Android.Support.V4.Content.Loader.IOnLoadCanceledListenerImplementor' will refer to 'Android.Support.V4.Content.Loader+IOnLoadCanceledListenerImplementor, Xamarin.Android.Support.Core.Utils, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
1>C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2152,3): warning : Duplicate managed type found! Mappings between managed types and Java types must be unique. First Type: 'Android.Support.V4.Content.Loader+IOnLoadCompleteListenerImplementor, Xamarin.Android.Support.Core.Utils, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'; Second Type: 'Android.Support.V4.Content.Loader+IOnLoadCompleteListenerImplementor, Xamarin.Android.Support.v4, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
1>C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2152,3): warning : References to the type 'Android.Support.V4.Content.Loader.IOnLoadCompleteListenerImplementor' will refer to 'Android.Support.V4.Content.Loader+IOnLoadCompleteListenerImplementor, Xamarin.Android.Support.Core.Utils, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
1>C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2152,3): warning : Duplicate managed type found! Mappings between managed types and Java types must be unique. First Type: 'Android.Support.V4.Media.Session.MediaSessionCompat+IOnActiveChangeListenerImplementor, Xamarin.Android.Support.Media.Compat, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'; Second Type: 'Android.Support.V4.Media.Session.MediaSessionCompat+IOnActiveChangeListenerImplementor, Xamarin.Android.Support.v4, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
1>C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2152,3): warning : References to the type 'Android.Support.V4.Media.Session.MediaSessionCompat.IOnActiveChangeListenerImplementor' will refer to 'Android.Support.V4.Media.Session.MediaSessionCompat+IOnActiveChangeListenerImplementor, Xamarin.Android.Support.Media.Compat, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
1>C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2152,3): warning : Duplicate managed type found! Mappings between managed types and Java types must be unique. First Type: 'Android.Support.V4.OS.CancellationSignal+IOnCancelListenerImplementor, Xamarin.Android.Support.Compat, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'; Second Type: 'Android.Support.V4.OS.CancellationSignal+IOnCancelListenerImplementor, Xamarin.Android.Support.v4, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
1>C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2152,3): warning : References to the type 'Android.Support.V4.OS.CancellationSignal.IOnCancelListenerImplementor' will refer to 'Android.Support.V4.OS.CancellationSignal+IOnCancelListenerImplementor, Xamarin.Android.Support.Compat, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
1>C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2152,3): warning : Duplicate managed type found! Mappings between managed types and Java types must be unique. First Type: 'Android.Support.V4.View.ActionProvider+ISubUiVisibilityListenerImplementor, Xamarin.Android.Support.Compat, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'; Second Type: 'Android.Support.V4.View.ActionProvider+ISubUiVisibilityListenerImplementor, Xamarin.Android.Support.v4, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
1>C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2152,3): warning : References to the type 'Android.Support.V4.View.ActionProvider.ISubUiVisibilityListenerImplementor' will refer to 'Android.Support.V4.View.ActionProvider+ISubUiVisibilityListenerImplementor, Xamarin.Android.Support.Compat, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
1>C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2152,3): warning : Duplicate managed type found! Mappings between managed types and Java types must be unique. First Type: 'Android.Support.V4.View.ActionProvider+IVisibilityListenerImplementor, Xamarin.Android.Support.Compat, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'; Second Type: 'Android.Support.V4.View.ActionProvider+IVisibilityListenerImplementor, Xamarin.Android.Support.v4, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
1>C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2152,3): warning : References to the type 'Android.Support.V4.View.ActionProvider.IVisibilityListenerImplementor' will refer to 'Android.Support.V4.View.ActionProvider+IVisibilityListenerImplementor, Xamarin.Android.Support.Compat, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
1>C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2152,3): warning : Duplicate managed type found! Mappings between managed types and Java types must be unique. First Type: 'Android.Support.V4.View.IOnApplyWindowInsetsListenerImplementor, Xamarin.Android.Support.Compat, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'; Second Type: 'Android.Support.V4.View.IOnApplyWindowInsetsListenerImplementor, Xamarin.Android.Support.v4, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
1>C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2152,3): warning : References to the type 'Android.Support.V4.View.IOnApplyWindowInsetsListenerImplementor' will refer to 'Android.Support.V4.View.IOnApplyWindowInsetsListenerImplementor, Xamarin.Android.Support.Compat, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
1>C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2152,3): warning : Duplicate managed type found! Mappings between managed types and Java types must be unique. First Type: 'Android.Support.V4.View.IViewPropertyAnimatorListenerImplementor, Xamarin.Android.Support.Compat, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'; Second Type: 'Android.Support.V4.View.IViewPropertyAnimatorListenerImplementor, Xamarin.Android.Support.v4, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
1>C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2152,3): warning : References to the type 'Android.Support.V4.View.IViewPropertyAnimatorListenerImplementor' will refer to 'Android.Support.V4.View.IViewPropertyAnimatorListenerImplementor, Xamarin.Android.Support.Compat, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
1>C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2152,3): warning : Duplicate managed type found! Mappings between managed types and Java types must be unique. First Type: 'Android.Support.V4.View.IViewPropertyAnimatorUpdateListenerImplementor, Xamarin.Android.Support.Compat, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'; Second Type: 'Android.Support.V4.View.IViewPropertyAnimatorUpdateListenerImplementor, Xamarin.Android.Support.v4, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
1>C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2152,3): warning : References to the type 'Android.Support.V4.View.IViewPropertyAnimatorUpdateListenerImplementor' will refer to 'Android.Support.V4.View.IViewPropertyAnimatorUpdateListenerImplementor, Xamarin.Android.Support.Compat, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
1>C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2152,3): warning : Duplicate managed type found! Mappings between managed types and Java types must be unique. First Type: 'Android.Support.V4.View.MenuItemCompat+IOnActionExpandListenerImplementor, Xamarin.Android.Support.Compat, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'; Second Type: 'Android.Support.V4.View.MenuItemCompat+IOnActionExpandListenerImplementor, Xamarin.Android.Support.v4, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
1>C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2152,3): warning : References to the type 'Android.Support.V4.View.MenuItemCompat.IOnActionExpandListenerImplementor' will refer to 'Android.Support.V4.View.MenuItemCompat+IOnActionExpandListenerImplementor, Xamarin.Android.Support.Compat, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
1>C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2152,3): warning : Duplicate managed type found! Mappings between managed types and Java types must be unique. First Type: 'Android.Support.V4.Widget.DrawerLayout+IDrawerListenerImplementor, Xamarin.Android.Support.Core.UI, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'; Second Type: 'Android.Support.V4.Widget.DrawerLayout+IDrawerListenerImplementor, Xamarin.Android.Support.v4, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
1>C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2152,3): warning : References to the type 'Android.Support.V4.Widget.DrawerLayout.IDrawerListenerImplementor' will refer to 'Android.Support.V4.Widget.DrawerLayout+IDrawerListenerImplementor, Xamarin.Android.Support.Core.UI, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
1>C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2152,3): warning : Duplicate managed type found! Mappings between managed types and Java types must be unique. First Type: 'Android.Support.V4.Widget.SlidingPaneLayout+IPanelSlideListenerImplementor, Xamarin.Android.Support.Core.UI, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'; Second Type: 'Android.Support.V4.Widget.SlidingPaneLayout+IPanelSlideListenerImplementor, Xamarin.Android.Support.v4, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
1>C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2152,3): warning : References to the type 'Android.Support.V4.Widget.SlidingPaneLayout.IPanelSlideListenerImplementor' will refer to 'Android.Support.V4.Widget.SlidingPaneLayout+IPanelSlideListenerImplementor, Xamarin.Android.Support.Core.UI, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
1> Uncaught translation error: java.lang.IllegalArgumentException: already added: Landroid/support/v4/accessibilityservice/AccessibilityServiceInfoCompat;
1> Uncaught translation error: java.lang.IllegalArgumentException: already added: Landroid/support/v4/app/ActivityCompat;
1> Uncaught translation error: java.lang.IllegalArgumentException: already added: Landroid/support/v4/app/ActivityCompat$1;
1> Uncaught translation error: java.lang.IllegalArgumentException: already added: Landroid/support/v4/app/ActivityCompat$OnRequestPermissionsResultCallback;
1> Uncaught translation error: java.lang.IllegalArgumentException: already added: Landroid/support/v4/app/ActivityCompat$SharedElementCallback21Impl;
1> Uncaught translation error: java.lang.IllegalArgumentException: already added: Landroid/support/v4/app/ActivityManagerCompat;
1> Uncaught translation error: java.lang.IllegalArgumentException: already added: Landroid/support/v4/app/ActivityOptionsCompat;
1> Uncaught translation error: java.lang.IllegalArgumentException: already added: Landroid/support/v4/app/AppOpsManagerCompat;
1> Uncaught translation error: java.lang.IllegalArgumentException: already added: Landroid/support/v4/app/BundleCompat;
1>
1> UNEXPECTED TOP-LEVEL EXCEPTION:
1> java.lang.RuntimeException: Translation has been interrupted
1> at com.android.dx.command.dexer.Main.processAllFiles(Main.java:613)
1> at com.android.dx.command.dexer.Main.runMonoDex(Main.java:311)
1> at com.android.dx.command.dexer.Main.run(Main.java:277)
1> at com.android.dx.command.dexer.Main.main(Main.java:245)
1> at com.android.dx.command.Main.main(Main.java:106)
1> Caused by: java.lang.InterruptedException: Too many errors
1> at com.android.dx.command.dexer.Main.processAllFiles(Main.java:605)
1> ... 4 more
1>C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2521,3): error : java.lang.IllegalArgumentException: already added : Landroid/support/v4/accessibilityservice/AccessibilityServiceInfoCompat;
========== Rebuild All: 0 succeeded, 1 failed, 0 skipped ==========
我已经尝试在Package Manager控制台中输入以下命令，但是仍然遇到相同的问题。
Update-Package -reinstall
Update-Package
有人可以帮我解决这个问题吗？
答案 0 :(得分：1)
在安装Xamain.Android.Support.v4 nuget程序包之后安装Microsoft.Azure.Mobile.Client将解决此问题。