Xamarin Forms Android 应用在启动后崩溃（启动）
Xamarin Forms Android app crashes after splash (Startup)
我正在使用Xamarin Forms开发一个(IOS and Android)应用程序。
我正在尝试运行我的应用程序Android版本，但不幸的是应用程序崩溃了在闪屏之后。
我已经尝试过 Emulator 以及 physical device(Moto G3)。
我已将 Xamarin studio 更新为最新的 stable 版本。我尝试更改工作 solution directory 但同样的问题仍然存在。
我将断点保留在 SplashActivity OnCreate() 但调试器没有来到这一行。
IDE - Xamarin Studio 6.1.1（内部版本 17）
OS - Mac OS 10.11.5
Xamarin.Android-7.0.1.3
SplashActivity.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Android.App;
using Android.Content;
using Android.OS;
using Android.Runtime;
using Android.Util;
using Android.Views;
using Android.Widget;
namespace SampleApp.Droid
{
[Activity(Label = "SampleApp",Theme = "@style/MyTheme.Splash", MainLauncher = true)]
public class signup : Activity
{
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
// Create your application here
}
protected override void OnResume()
{
base.OnResume();
Task startupWork = new Task(() =>
{
//Log.Debug(TAG, "Performing some startup work that takes a bit of time.");
Task.Delay(5000); // Simulate a bit of startup work.
//Log.Debug(TAG, "Working in the background - important stuff.");
});
startupWork.ContinueWith(t =>
{
//Log.Debug(TAG, "Work is finished - start Activity1.");
StartActivity(new Intent(Application.Context, typeof(MainActivity)));
}, TaskScheduler.FromCurrentSynchronizationContext());
startupWork.Start();
}
}
}
MainActivity.cs
using System;
using Android.App;
using Android.Content;
using Android.Content.PM;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.OS;
using Acr.UserDialogs;
using Xamarin.Forms;
using Plugin.Toasts;
using XLabs.Platform.Services;
using XLabs.Platform.Device;
using XLabs.Platform.Services.Media;
using XLabs.Ioc;
namespace SampleApp.Droid
{
[Activity(Label = "SampleApp.Droid", Icon = "@drawable/icon", Theme = "@style/MyTheme", MainLauncher = false, ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation)]
public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity
{
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
global::Xamarin.Forms.Forms.Init(this, bundle);
UserDialogs.Init(this);
SetXLabsInitialization();
LoadApplication(new App());
}
private void SetXLabsInitialization()
{
var container = new SimpleContainer();
container.Register<IDevice>(t => AndroidDevice.CurrentDevice)
.Register<IPhoneService>(t => t.Resolve<IDevice>().PhoneService)
.Register<IAudioStream>(t => t.Resolve<IDevice>().Microphone)
.Register<INetwork>(t => t.Resolve<IDevice>().Network)
.Register<IDependencyContainer>(container);
Resolver.SetResolver(container.GetResolver());
}
}
}
应用输出
Forwarding debugger port 8883
Detecting existing process
> am start -n "com.excelblaze.SampleApp/md51642ab35ccd81a05989cf18bf9b46112.signup"
> Starting: Intent { cmp=com.excelblaze.SampleApp/md51642ab35ccd81a05989cf18bf9b46112.signup }
Loaded assembly: SampleApp.Droid.dll
Loaded assembly: Mono.Android.Export.dll [External]
Loaded assembly: Xamarin.Android.Support.v4.dll [External]
Loaded assembly: Xamarin.Android.Support.Vector.Drawable.dll [External]
Loaded assembly: Xamarin.Android.Support.Animated.Vector.Drawable.dll [External]
Loaded assembly: Xamarin.Android.Support.v7.AppCompat.dll [External]
Loaded assembly: Xamarin.Android.Support.v7.RecyclerView.dll [External]
Loaded assembly: Xamarin.Android.Support.Design.dll [External]
Loaded assembly: Xamarin.Android.Support.v7.CardView.dll [External]
Loaded assembly: Xamarin.Android.Support.v7.MediaRouter.dll [External]
Loaded assembly: Xamarin.Forms.Platform.Android.dll [External]
Loaded assembly: FormsViewGroup.dll [External]
Loaded assembly: Xamarin.Forms.Core.dll [External]
Loaded assembly: Xamarin.Forms.Xaml.dll [External]
Loaded assembly: Xamarin.Forms.Platform.dll [External]
Loaded assembly: AndHUD.dll [External]
Loaded assembly: Splat.dll [External]
Loaded assembly: Acr.Support.Android.dll [External]
Loaded assembly: Acr.UserDialogs.dll [External]
Loaded assembly: Acr.UserDialogs.Interface.dll [External]
Loaded assembly: Newtonsoft.Json.dll [External]
Loaded assembly: Rg.Plugins.Popup.dll [External]
Loaded assembly: Rg.Plugins.Popup.Droid.dll [External]
Loaded assembly: Xamarin.GooglePlayServices.Basement.dll [External]
Loaded assembly: Xamarin.GooglePlayServices.Base.dll [External]
Loaded assembly: Xamarin.GooglePlayServices.Maps.dll [External]
Loaded assembly: Xamarin.Forms.Maps.Android.dll [External]
Loaded assembly: Xamarin.Forms.Maps.dll [External]
Loaded assembly: Toasts.Forms.Plugin.Abstractions.dll [External]
Loaded assembly: Toasts.Forms.Plugin.Droid.dll [External]
Loaded assembly: ExifLib.dll [External]
Loaded assembly: XLabs.Core.dll [External]
Loaded assembly: XLabs.Platform.dll [External]
Loaded assembly: XLabs.Platform.Droid.dll [External]
Loaded assembly: XLabs.Ioc.dll [External]
Loaded assembly: SampleApp.dll
Loaded assembly: XamForms.Controls.Calendar.dll [External]
Loaded assembly: Plugin.Geolocator.Abstractions.dll [External]
Loaded assembly: Plugin.Geolocator.dll [External]
Loaded assembly: Mono.Android.dll [External]
Loaded assembly: Java.Interop.dll [External]
Loaded assembly: System.dll [External]
Loaded assembly: System.Core.dll [External]
Error/Warning - 构建输出
Build started 10/31/2016 7:20:04 PM.
__________________________________________________
Project "/Users/umar_shazuli/Documents/Umar/SA/WorkingCode/SA_31_10_2016/Mobile/UITests/SampleApp.UITests.csproj" (Build target(s)):
Target PrepareForBuild:
Configuration: Debug Platform: AnyCPU
Target ResolveProjectReferences:
Project "/Users/umar_shazuli/Documents/Umar/SA/WorkingCode/SA_31_10_2016/Mobile/iOS/SampleApp.iOS.csproj" (GetTargetPath target(s)):
/Users/umar_shazuli/Documents/Umar/SA/WorkingCode/SA_31_10_2016/Mobile/iOS/SampleApp.iOS.csproj: warning : Target '_CopyOutOfDateSourceItemsToOutputDirectory', not found in the project
/Users/umar_shazuli/Documents/Umar/SA/WorkingCode/SA_31_10_2016/Mobile/iOS/SampleApp.iOS.csproj: warning : Target 'XapPackager', not found in the project
Target BclBuildValidateNugetPackageReferences:
: warning : All projects referencing SampleApp.iOS.csproj must install nuget package MSArosoft.Bcl.Build. For more information, see http://go.mSArosoft.com/fwlink/?LinkID=317569.
Done building project "/Users/umar_shazuli/Documents/Umar/SA/WorkingCode/SA_31_10_2016/Mobile/iOS/SampleApp.iOS.csproj".
Project "/Users/umar_shazuli/Documents/Umar/SA/WorkingCode/SA_31_10_2016/Mobile/Droid/SampleApp.Droid.csproj" (GetTargetPath target(s)):
Target BclBuildValidateNugetPackageReferences:
: warning : All projects referencing SampleApp.Droid.csproj must install nuget package MSArosoft.Bcl.Build. For more information, see http://go.mSArosoft.com/fwlink/?LinkID=317569.
Done building project "/Users/umar_shazuli/Documents/Umar/SA/WorkingCode/SA_31_10_2016/Mobile/Droid/SampleApp.Droid.csproj".
Target GenerateSatelliteAssemblies:
No input files were specified for target GenerateSatelliteAssemblies, skipping.
Target _GenerateTargetFrameworkMonikerAttribute:
Skipping target "_GenerateTargetFrameworkMonikerAttribute" because its outputs are up-to-date.
Target CoreCompile:
Skipping target "CoreCompile" because its outputs are up-to-date.
Done building project "/Users/umar_shazuli/Documents/Umar/SA/WorkingCode/SA_31_10_2016/Mobile/UITests/SampleApp.UITests.csproj".
Build succeeded.
Warnings:
/Users/umar_shazuli/Documents/Umar/SA/WorkingCode/SA_31_10_2016/Mobile/UITests/SampleApp.UITests.csproj (Build) ->
/Library/Frameworks/Mono.framework/Versions/4.6.1/lib/mono/xbuild/14.0/bin/MSArosoft.Common.targets (ResolveProjectReferences target) ->
/Users/umar_shazuli/Documents/Umar/SA/WorkingCode/SA_31_10_2016/Mobile/iOS/SampleApp.iOS.csproj (GetTargetPath) ->
/Users/umar_shazuli/Documents/Umar/SA/WorkingCode/SA_31_10_2016/Mobile/iOS/SampleApp.iOS.csproj: warning : Target '_CopyOutOfDateSourceItemsToOutputDirectory', not found in the project
/Users/umar_shazuli/Documents/Umar/SA/WorkingCode/SA_31_10_2016/Mobile/iOS/SampleApp.iOS.csproj: warning : Target 'XapPackager', not found in the project
/Users/umar_shazuli/Documents/Umar/SA/WorkingCode/SA_31_10_2016/Mobile/UITests/SampleApp.UITests.csproj (Build) ->
/Library/Frameworks/Mono.framework/Versions/4.6.1/lib/mono/xbuild/14.0/bin/MSArosoft.Common.targets (ResolveProjectReferences target) ->
/Users/umar_shazuli/Documents/Umar/SA/WorkingCode/SA_31_10_2016/Mobile/iOS/SampleApp.iOS.csproj (GetTargetPath) ->
/Users/umar_shazuli/Documents/Umar/SA/WorkingCode/SA_31_10_2016/Mobile/packages/MSArosoft.Bcl.Build.1.0.21/build/MSArosoft.Bcl.Build.targets (BclBuildValidateNugetPackageReferences target) ->
: warning : All projects referencing SampleApp.iOS.csproj must install nuget package MSArosoft.Bcl.Build. For more information, see http://go.mSArosoft.com/fwlink/?LinkID=317569.
/Users/umar_shazuli/Documents/Umar/SA/WorkingCode/SA_31_10_2016/Mobile/UITests/SampleApp.UITests.csproj (Build) ->
/Library/Frameworks/Mono.framework/Versions/4.6.1/lib/mono/xbuild/14.0/bin/MSArosoft.Common.targets (ResolveProjectReferences target) ->
/Users/umar_shazuli/Documents/Umar/SA/WorkingCode/SA_31_10_2016/Mobile/Droid/SampleApp.Droid.csproj (GetTargetPath) ->
/Users/umar_shazuli/Documents/Umar/SA/WorkingCode/SA_31_10_2016/Mobile/packages/MSArosoft.Bcl.Build.1.0.21/build/MSArosoft.Bcl.Build.targets (BclBuildValidateNugetPackageReferences target) ->
: warning : All projects referencing SampleApp.Droid.csproj must install nuget package MSArosoft.Bcl.Build. For more information, see http://go.mSArosoft.com/fwlink/?LinkID=317569.
4 Warning(s)
0 Error(s)
Time Elapsed 00:00:00.5679990
---------------------- Done ----------------------
Build: 0 errors, 12 warnings
如果 SplashActivity 启动但随后崩溃，我建议您注释掉以下内容。
OnCreate中的MainActivity缩小问题范围：
- UserDialogs.Init(这个);
- SetXLabsInitialization();
可能其中之一需要不存在的程序集。
如果这些初始化没有破坏它，那么在 Xamarin 诊断输出日志中查找 Xaml 错误。
我正在使用Xamarin Forms开发一个(IOS and Android)应用程序。
我正在尝试运行我的应用程序Android版本，但不幸的是应用程序崩溃了在闪屏之后。
我已经尝试过 Emulator 以及 physical device(Moto G3)。
我已将 Xamarin studio 更新为最新的 stable 版本。我尝试更改工作 solution directory 但同样的问题仍然存在。
我将断点保留在 SplashActivity OnCreate() 但调试器没有来到这一行。
IDE - Xamarin Studio 6.1.1（内部版本 17）
OS - Mac OS 10.11.5
Xamarin.Android-7.0.1.3
SplashActivity.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Android.App;
using Android.Content;
using Android.OS;
using Android.Runtime;
using Android.Util;
using Android.Views;
using Android.Widget;
namespace SampleApp.Droid
{
[Activity(Label = "SampleApp",Theme = "@style/MyTheme.Splash", MainLauncher = true)]
public class signup : Activity
{
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
// Create your application here
}
protected override void OnResume()
{
base.OnResume();
Task startupWork = new Task(() =>
{
//Log.Debug(TAG, "Performing some startup work that takes a bit of time.");
Task.Delay(5000); // Simulate a bit of startup work.
//Log.Debug(TAG, "Working in the background - important stuff.");
});
startupWork.ContinueWith(t =>
{
//Log.Debug(TAG, "Work is finished - start Activity1.");
StartActivity(new Intent(Application.Context, typeof(MainActivity)));
}, TaskScheduler.FromCurrentSynchronizationContext());
startupWork.Start();
}
}
}
MainActivity.cs
using System;
using Android.App;
using Android.Content;
using Android.Content.PM;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.OS;
using Acr.UserDialogs;
using Xamarin.Forms;
using Plugin.Toasts;
using XLabs.Platform.Services;
using XLabs.Platform.Device;
using XLabs.Platform.Services.Media;
using XLabs.Ioc;
namespace SampleApp.Droid
{
[Activity(Label = "SampleApp.Droid", Icon = "@drawable/icon", Theme = "@style/MyTheme", MainLauncher = false, ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation)]
public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity
{
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
global::Xamarin.Forms.Forms.Init(this, bundle);
UserDialogs.Init(this);
SetXLabsInitialization();
LoadApplication(new App());
}
private void SetXLabsInitialization()
{
var container = new SimpleContainer();
container.Register<IDevice>(t => AndroidDevice.CurrentDevice)
.Register<IPhoneService>(t => t.Resolve<IDevice>().PhoneService)
.Register<IAudioStream>(t => t.Resolve<IDevice>().Microphone)
.Register<INetwork>(t => t.Resolve<IDevice>().Network)
.Register<IDependencyContainer>(container);
Resolver.SetResolver(container.GetResolver());
}
}
}
应用输出
Forwarding debugger port 8883
Detecting existing process
> am start -n "com.excelblaze.SampleApp/md51642ab35ccd81a05989cf18bf9b46112.signup"
> Starting: Intent { cmp=com.excelblaze.SampleApp/md51642ab35ccd81a05989cf18bf9b46112.signup }
Loaded assembly: SampleApp.Droid.dll
Loaded assembly: Mono.Android.Export.dll [External]
Loaded assembly: Xamarin.Android.Support.v4.dll [External]
Loaded assembly: Xamarin.Android.Support.Vector.Drawable.dll [External]
Loaded assembly: Xamarin.Android.Support.Animated.Vector.Drawable.dll [External]
Loaded assembly: Xamarin.Android.Support.v7.AppCompat.dll [External]
Loaded assembly: Xamarin.Android.Support.v7.RecyclerView.dll [External]
Loaded assembly: Xamarin.Android.Support.Design.dll [External]
Loaded assembly: Xamarin.Android.Support.v7.CardView.dll [External]
Loaded assembly: Xamarin.Android.Support.v7.MediaRouter.dll [External]
Loaded assembly: Xamarin.Forms.Platform.Android.dll [External]
Loaded assembly: FormsViewGroup.dll [External]
Loaded assembly: Xamarin.Forms.Core.dll [External]
Loaded assembly: Xamarin.Forms.Xaml.dll [External]
Loaded assembly: Xamarin.Forms.Platform.dll [External]
Loaded assembly: AndHUD.dll [External]
Loaded assembly: Splat.dll [External]
Loaded assembly: Acr.Support.Android.dll [External]
Loaded assembly: Acr.UserDialogs.dll [External]
Loaded assembly: Acr.UserDialogs.Interface.dll [External]
Loaded assembly: Newtonsoft.Json.dll [External]
Loaded assembly: Rg.Plugins.Popup.dll [External]
Loaded assembly: Rg.Plugins.Popup.Droid.dll [External]
Loaded assembly: Xamarin.GooglePlayServices.Basement.dll [External]
Loaded assembly: Xamarin.GooglePlayServices.Base.dll [External]
Loaded assembly: Xamarin.GooglePlayServices.Maps.dll [External]
Loaded assembly: Xamarin.Forms.Maps.Android.dll [External]
Loaded assembly: Xamarin.Forms.Maps.dll [External]
Loaded assembly: Toasts.Forms.Plugin.Abstractions.dll [External]
Loaded assembly: Toasts.Forms.Plugin.Droid.dll [External]
Loaded assembly: ExifLib.dll [External]
Loaded assembly: XLabs.Core.dll [External]
Loaded assembly: XLabs.Platform.dll [External]
Loaded assembly: XLabs.Platform.Droid.dll [External]
Loaded assembly: XLabs.Ioc.dll [External]
Loaded assembly: SampleApp.dll
Loaded assembly: XamForms.Controls.Calendar.dll [External]
Loaded assembly: Plugin.Geolocator.Abstractions.dll [External]
Loaded assembly: Plugin.Geolocator.dll [External]
Loaded assembly: Mono.Android.dll [External]
Loaded assembly: Java.Interop.dll [External]
Loaded assembly: System.dll [External]
Loaded assembly: System.Core.dll [External]
Error/Warning - 构建输出
Build started 10/31/2016 7:20:04 PM.
__________________________________________________
Project "/Users/umar_shazuli/Documents/Umar/SA/WorkingCode/SA_31_10_2016/Mobile/UITests/SampleApp.UITests.csproj" (Build target(s)):
Target PrepareForBuild:
Configuration: Debug Platform: AnyCPU
Target ResolveProjectReferences:
Project "/Users/umar_shazuli/Documents/Umar/SA/WorkingCode/SA_31_10_2016/Mobile/iOS/SampleApp.iOS.csproj" (GetTargetPath target(s)):
/Users/umar_shazuli/Documents/Umar/SA/WorkingCode/SA_31_10_2016/Mobile/iOS/SampleApp.iOS.csproj: warning : Target '_CopyOutOfDateSourceItemsToOutputDirectory', not found in the project
/Users/umar_shazuli/Documents/Umar/SA/WorkingCode/SA_31_10_2016/Mobile/iOS/SampleApp.iOS.csproj: warning : Target 'XapPackager', not found in the project
Target BclBuildValidateNugetPackageReferences:
: warning : All projects referencing SampleApp.iOS.csproj must install nuget package MSArosoft.Bcl.Build. For more information, see http://go.mSArosoft.com/fwlink/?LinkID=317569.
Done building project "/Users/umar_shazuli/Documents/Umar/SA/WorkingCode/SA_31_10_2016/Mobile/iOS/SampleApp.iOS.csproj".
Project "/Users/umar_shazuli/Documents/Umar/SA/WorkingCode/SA_31_10_2016/Mobile/Droid/SampleApp.Droid.csproj" (GetTargetPath target(s)):
Target BclBuildValidateNugetPackageReferences:
: warning : All projects referencing SampleApp.Droid.csproj must install nuget package MSArosoft.Bcl.Build. For more information, see http://go.mSArosoft.com/fwlink/?LinkID=317569.
Done building project "/Users/umar_shazuli/Documents/Umar/SA/WorkingCode/SA_31_10_2016/Mobile/Droid/SampleApp.Droid.csproj".
Target GenerateSatelliteAssemblies:
No input files were specified for target GenerateSatelliteAssemblies, skipping.
Target _GenerateTargetFrameworkMonikerAttribute:
Skipping target "_GenerateTargetFrameworkMonikerAttribute" because its outputs are up-to-date.
Target CoreCompile:
Skipping target "CoreCompile" because its outputs are up-to-date.
Done building project "/Users/umar_shazuli/Documents/Umar/SA/WorkingCode/SA_31_10_2016/Mobile/UITests/SampleApp.UITests.csproj".
Build succeeded.
Warnings:
/Users/umar_shazuli/Documents/Umar/SA/WorkingCode/SA_31_10_2016/Mobile/UITests/SampleApp.UITests.csproj (Build) ->
/Library/Frameworks/Mono.framework/Versions/4.6.1/lib/mono/xbuild/14.0/bin/MSArosoft.Common.targets (ResolveProjectReferences target) ->
/Users/umar_shazuli/Documents/Umar/SA/WorkingCode/SA_31_10_2016/Mobile/iOS/SampleApp.iOS.csproj (GetTargetPath) ->
/Users/umar_shazuli/Documents/Umar/SA/WorkingCode/SA_31_10_2016/Mobile/iOS/SampleApp.iOS.csproj: warning : Target '_CopyOutOfDateSourceItemsToOutputDirectory', not found in the project
/Users/umar_shazuli/Documents/Umar/SA/WorkingCode/SA_31_10_2016/Mobile/iOS/SampleApp.iOS.csproj: warning : Target 'XapPackager', not found in the project
/Users/umar_shazuli/Documents/Umar/SA/WorkingCode/SA_31_10_2016/Mobile/UITests/SampleApp.UITests.csproj (Build) ->
/Library/Frameworks/Mono.framework/Versions/4.6.1/lib/mono/xbuild/14.0/bin/MSArosoft.Common.targets (ResolveProjectReferences target) ->
/Users/umar_shazuli/Documents/Umar/SA/WorkingCode/SA_31_10_2016/Mobile/iOS/SampleApp.iOS.csproj (GetTargetPath) ->
/Users/umar_shazuli/Documents/Umar/SA/WorkingCode/SA_31_10_2016/Mobile/packages/MSArosoft.Bcl.Build.1.0.21/build/MSArosoft.Bcl.Build.targets (BclBuildValidateNugetPackageReferences target) ->
: warning : All projects referencing SampleApp.iOS.csproj must install nuget package MSArosoft.Bcl.Build. For more information, see http://go.mSArosoft.com/fwlink/?LinkID=317569.
/Users/umar_shazuli/Documents/Umar/SA/WorkingCode/SA_31_10_2016/Mobile/UITests/SampleApp.UITests.csproj (Build) ->
/Library/Frameworks/Mono.framework/Versions/4.6.1/lib/mono/xbuild/14.0/bin/MSArosoft.Common.targets (ResolveProjectReferences target) ->
/Users/umar_shazuli/Documents/Umar/SA/WorkingCode/SA_31_10_2016/Mobile/Droid/SampleApp.Droid.csproj (GetTargetPath) ->
/Users/umar_shazuli/Documents/Umar/SA/WorkingCode/SA_31_10_2016/Mobile/packages/MSArosoft.Bcl.Build.1.0.21/build/MSArosoft.Bcl.Build.targets (BclBuildValidateNugetPackageReferences target) ->
: warning : All projects referencing SampleApp.Droid.csproj must install nuget package MSArosoft.Bcl.Build. For more information, see http://go.mSArosoft.com/fwlink/?LinkID=317569.
4 Warning(s)
0 Error(s)
Time Elapsed 00:00:00.5679990
---------------------- Done ----------------------
Build: 0 errors, 12 warnings
如果 SplashActivity 启动但随后崩溃，我建议您注释掉以下内容。
OnCreate中的MainActivity缩小问题范围：
- UserDialogs.Init(这个);
- SetXLabsInitialization();
可能其中之一需要不存在的程序集。
如果这些初始化没有破坏它，那么在 Xamarin 诊断输出日志中查找 Xaml 错误。