TextInputEditText：ArgumentNullException：MvxWeakEventSubscription中缺少源事件信息

突然，我的TextInputEditText的绑定开始失败，并且它与链接器有关。 如果我将链接器设置为“无”，则一切都按预期工作。 我使用的很多其他绑定仍然可以正常工作。

堆栈我得到：

视图绑定期间抛出的exceptionArgumentNullException：MvxWeakEventSubscription中缺少源事件信息参数名称：MvvmCross.Platform.WeakSubscription.MvxWeakEventSubscription 2[TSource,TEventArgs]..ctor (Android.Widget.TextView source, System.Reflection.EventInfo sourceEventInfo, System.EventHandler sourceEventInfo 2[TSource,TEventArgs]..ctor (Android.Widget.TextView source, System.Reflection.EventInfo sourceEventInfo, System.EventHandler 1 [TEventArgs] targetEventHandler）[0x00017]在D：\ git \ MvvmCross \ MvvmCross \ Platform \ Platform \ WeakSubscription \ MvxWeakEventSubscription.cs：47 at MvvmCross.Platform.WeakSubscription.MvxWeakEventSubscription 2[TSource,TEventArgs]..ctor (Android.Widget.TextView source, System.String sourceEventName, System.EventHandler 1 [TEventArgs] targetEventHandler）[0x00000]位于MvvmCross.Platform的D：\ git \ MvvmCross \ MvvmCross \ Platform \ Platform \ WeakSubscription \ MvxWeakEventSubscription.cs：34 .WeakSubscription.MvxWeakSubscriptionExtensionMethods.WeakSubscribe [TSource，TEventArgs]（TSource source，System.String eventName，System.EventHandler 1[TEventArgs] eventHandler) [0x00000] in D:\git\MvvmCross\MvvmCross\Platform\Platform\WeakSubscription\MvxWeakSubscriptionExtensionMethods.cs:81 at MvvmCross.Binding.Droid.Target.MvxTextViewTextTargetBinding.SubscribeToEvents () [0x0000b] in :0 at MvvmCross.Binding.Bindings.MvxFullBinding.CreateTargetBinding (System.Object target) [0x00057] in D:\git\MvvmCross\MvvmCross\Core\Binding\Bindings\MvxFullBinding.cs:157 at MvvmCross.Binding.Bindings.MvxFullBinding..ctor (MvvmCross.Binding.MvxBindingRequest bindingRequest) [0x00028] in D:\git\MvvmCross\MvvmCross\Core\Binding\Bindings\MvxFullBinding.cs:64 at MvvmCross.Binding.Binders.MvxFromTextBinder.BindSingle (MvvmCross.Binding.MvxBindingRequest bindingRequest) [0x00000] in D:\git\MvvmCross\MvvmCross\Core\Binding\Binders\MvxFromTextBinder.cs:56 at MvvmCross.Binding.Binders.MvxFromTextBinder+c__DisplayClass2_0.b__0 (MvvmCross.Binding.Bindings.MvxBindingDescription description) [0x00000] in D:\git\MvvmCross\MvvmCross\Core\Binding\Binders\MvxFromTextBinder.cs:38 at System.Linq.Enumerable+c__AnonStorey1D 1[TEventArgs] eventHandler) [0x00000] in D:\git\MvvmCross\MvvmCross\Platform\Platform\WeakSubscription\MvxWeakSubscriptionExtensionMethods.cs:81 at MvvmCross.Binding.Droid.Target.MvxTextViewTextTargetBinding.SubscribeToEvents () [0x0000b] in :0 at MvvmCross.Binding.Bindings.MvxFullBinding.CreateTargetBinding (System.Object target) [0x00057] in D:\git\MvvmCross\MvvmCross\Core\Binding\Bindings\MvxFullBinding.cs:157 at MvvmCross.Binding.Bindings.MvxFullBinding..ctor (MvvmCross.Binding.MvxBindingRequest bindingRequest) [0x00028] in D:\git\MvvmCross\MvvmCross\Core\Binding\Bindings\MvxFullBinding.cs:64 at MvvmCross.Binding.Binders.MvxFromTextBinder.BindSingle (MvvmCross.Binding.MvxBindingRequest bindingRequest) [0x00000] in D:\git\MvvmCross\MvvmCross\Core\Binding\Binders\MvxFromTextBinder.cs:56 at MvvmCross.Binding.Binders.MvxFromTextBinder+c__DisplayClass2_0.b__0 (MvvmCross.Binding.Bindings.MvxBindingDescription description) [0x00000] in D:\git\MvvmCross\MvvmCross\Core\Binding\Binders\MvxFromTextBinder.cs:38 at System.Linq.Enumerable+c__AnonStorey1D 1[TEventArgs] eventHandler) [0x00000] in D:\git\MvvmCross\MvvmCross\Platform\Platform\WeakSubscription\MvxWeakSubscriptionExtensionMethods.cs:81 at MvvmCross.Binding.Droid.Target.MvxTextViewTextTargetBinding.SubscribeToEvents () [0x0000b] in :0 at MvvmCross.Binding.Bindings.MvxFullBinding.CreateTargetBinding (System.Object target) [0x00057] in D:\git\MvvmCross\MvvmCross\Core\Binding\Bindings\MvxFullBinding.cs:157 at MvvmCross.Binding.Bindings.MvxFullBinding..ctor (MvvmCross.Binding.MvxBindingRequest bindingRequest) [0x00028] in D:\git\MvvmCross\MvvmCross\Core\Binding\Bindings\MvxFullBinding.cs:64 at MvvmCross.Binding.Binders.MvxFromTextBinder.BindSingle (MvvmCross.Binding.MvxBindingRequest bindingRequest) [0x00000] in D:\git\MvvmCross\MvvmCross\Core\Binding\Binders\MvxFromTextBinder.cs:56 at MvvmCross.Binding.Binders.MvxFromTextBinder+c__DisplayClass2_0.b__0 (MvvmCross.Binding.Bindings.MvxBindingDescription description) [0x00000] in D:\git\MvvmCross\MvvmCross\Core\Binding\Binders\MvxFromTextBinder.cs:38 at System.Linq.Enumerable+c__AnonStorey1D 3 [TSource，TMiddle，TResult]。 m__0（TSource x）[0x00012] in：0 at System.Linq.Enumerable + c__AnonStorey1D 3[TSource,TMiddle,TResult].m__0 (TSource x) [0x00000] in :0 at System.Linq.Enumerable+WhereSelectEnumerableIterator 2 [TSource，TResult] .MoveNext（）[0x00064] in：0 at System.Collections .Generic.List 1[T].InsertRange (System.Int32 index, System.Collections.Generic.IEnumerable 1 [T] collection）[0x000ff] in ：0 at System.Collections.Generic.List 1[T].AddRange (System.Collections.Generic.IEnumerable Android.Views.View视图，System.Collections.Generic）中的1[T].AddRange (System.Collections.Generic.IEnumerable 1 [T] collection）[0x00000] in ：0 .Inumerable`1 [T] newBindings）[0x00028]在：0在MvvmCross.Binding.Droid.Binders.MvxAndroidViewBinder.ApplyBindingsFr omAttribute（Android.Views.View视图，Android.Content.Res.TypedArray typedArray，System.Int32 attributeId）[0x0001c]在中：0

我已经将以下内容添加到“LinkerPleaseInclude”，但它没有帮助。

  public void Include(TextInputEditText text) { text.TextChanged += (sender, args) => text.Text = "" + text.Text; text.Hint = "" + text.Hint; text.Background = (Drawable)Android.Resource.Color.Black; text.Text = "Text" + text.Text; } public void Include(TextInputLayout text) { text.Hint = "" + text.Hint; text.Background = (Drawable)Android.Resource.Color.Black; } 

将TextInputEditText更改为简单的EditText，也没有帮助，并抛出相同的exception。

我错过了什么？ 通过查看堆栈，我没有更接近解决方案。

Answer 1

经过一番挖掘，我发现这个答案显示MvvmCross的新版本（v4.4.0）发生了变化，需要在项目的LinkerPleaseInclude.cs中对TextView部分进行调整。