Bug 47591 - Could not load type AndroidFormsRendering.XFPageRendererView
Summary: Could not load type AndroidFormsRendering.XFPageRendererView
Status: RESOLVED ANSWERED
Alias: None
Product: Visual Studio Extensions
Classification: Xamarin
Component: Xamarin.Forms Previewer ()
Version: 4.2.0 (C8)
Hardware: PC Windows
: --- normal
Target Milestone: ---
Assignee: Bugzilla
URL:
Depends on:
Blocks:
 
Reported: 2016-11-21 17:52 UTC by John Miller [MSFT]
Modified: 2016-11-21 19:18 UTC (History)
2 users (show)

Tags:
Is this bug a regression?: ---
Last known good build:


Attachments
Actual Results Screenshot (84.93 KB, image/png)
2016-11-21 17:52 UTC, John Miller [MSFT]
Details
Expected Results Screenshot (64.95 KB, image/png)
2016-11-21 17:52 UTC, John Miller [MSFT]
Details
IDE Log (27.08 KB, text/plain)
2016-11-21 17:53 UTC, John Miller [MSFT]
Details


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Status:
RESOLVED ANSWERED

Description John Miller [MSFT] 2016-11-21 17:52:08 UTC
** Overview **

When using the following XAML, the previewer does not load the view. Instead, I see a red background with XFPageRenderView.

** Steps to Reproduce **

1. File->New Forms Portable Project
2. Update NuGet packages for Xamarin.Forms
3. If there is not a XAML page already, use this:

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="PreviewerTestVS.Page1">
  <Label Text="Test Says Hello" VerticalOptions="Center" HorizontalOptions="Center" />
</ContentPage>

4. Build the android project
5. Open the previewer with that XAML page side-by-side

** Actual Results **

See attached image.

** Expected Results **

See attached image of what the iOS render looks like. 

** Additional Info **

Attached is the ide log for this session. Note the exception:

[Error] MonoDroid: Could not load type 'AndroidFormsRendering.XFPageRendererView, XamarinFormsPreviewer.Android, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'. Skipping JNI registration of type 'md5e940e1e778de0f856e343395a2f338c5/XFPageRendererView'.
Xamarin.VisualStudio.ActivationManager Information: 0 : [2016-11-21 12:41:42.8659] [Info] MonoDroid: UNHANDLED EXCEPTION:
Xamarin.VisualStudio.ActivationManager Information: 0 : [2016-11-21 12:41:43.1579] [Info] MonoDroid: System.TypeLoadException
Xamarin.VisualStudio.ActivationManager Information: 0 : [2016-11-21 12:41:43.4120] [Info] MonoDroid:   at (wrapper managed-to-native) System.Type:internal_from_name (string,bool,bool)
Xamarin.VisualStudio.ActivationManager Information: 0 : [2016-11-21 12:41:43.6670] [Info] MonoDroid:   at System.Type.GetType (System.String typeName, System.Boolean throwOnError) [0x00011] in <3dc9ed3d31194319991e686734adcb10>:0 
Xamarin.VisualStudio.ActivationManager Information: 0 : [2016-11-21 12:41:43.9581] [Info] MonoDroid:   at Java.Interop.TypeManager.n_Activate (System.IntPtr jnienv, System.IntPtr jclass, System.IntPtr typename_ptr, System.IntPtr signature_ptr, System.IntPtr jobject, System.IntPtr parameters_ptr) [0x00082] in <23a8d9bf141f4ef5b5a764e32add1f40>:0 
Xamarin.VisualStudio.ActivationManager Information: 0 : [2016-11-21 12:41:44.3752] mono.android.DesignerException: md5e940e1e778de0f856e343395a2f338c5.XFPageRendererView.n_onMeasure(II)V....
Comment 1 John Miller [MSFT] 2016-11-21 17:52:25 UTC
Created attachment 18579 [details]
Actual Results Screenshot
Comment 2 John Miller [MSFT] 2016-11-21 17:52:42 UTC
Created attachment 18580 [details]
Expected Results Screenshot
Comment 3 John Miller [MSFT] 2016-11-21 17:53:04 UTC
Created attachment 18581 [details]
IDE Log
Comment 4 Alan McGovern 2016-11-21 19:17:33 UTC
This is nearly definitely fixed in C9. As such I'm just going to close this as you can get C9 builds in alpha and we are not backporting the changes.