XAML Hot Reload not working.

Mehdi Jafari 56

Hello
First of All I updated VS to 8.9 on my Mac but I couldn't see XHR after that,
I uninstalled VS for Mac and installed it again, Then XHR added to VS but it does not work!

I have VS 8.9 (Latest ver) now and Xamarin.Froms 5.0.0.2012. I updated every things but...

linker is "Don't link". XHT is enabled. I test both of mode "Change only" and "Full Page". It doesn't work.

XHR output in statusbar is:

XAML Hot Reload is using 'changes only' mode
XAML Hot Reload initializing...
WARN: Unknown Breakpoint Hit: Android.Runtime.JNIEnv.RegisterJniNatives(System.IntPtr typeName_ptr, int typeName_len, System.IntPtr jniClass, System.IntPtr methods_ptr, int methods_len)
HotReload: Initialized Agent.XAML Hot Reload Connected and Ready.

I don't know why XHR not working.

thanks in advance.

Leon Lu (Shanghai Wicresoft Co,.Ltd.) 68,656 Reputation points Microsoft Vendor

2021-03-15T14:05:18.577+00:00

First of all, update all of your nuget package project to the latest, then close your VS, then delete the bin and obj folders, rebuild and run your project, if it worked as normal.
Willem van Rumpt 16 Reputation points

2021-03-15T15:22:36.61+00:00

Exact same message here.
No hot reload.
When making changes in XAML and saving, it looks Hot Reload is trying to do something, but nothing happens.
Deleted bin & obj folders and restarted VS: Nothing.
Peter Wilson 6 Reputation points

2021-03-24T00:42:54.993+00:00

Same issue here with a new Xamarin project. Hot reload not working.
Gertjan Brouwer 11 Reputation points

2021-04-13T17:20:33.497+00:00

This is still not working in 16.9.3 and 16.9.4. I think this should be fixed asap. A lot of people have this problem, but they constantly get closed because "a solution has been implemented, install latest version". However, that never works
Nicolas 1 Reputation point

2021-04-23T09:03:25.12+00:00

I am encountering the same problem, with the same error message. I am on VS 16.9.4. Deleted bin and object folders (in Droid and Shared projects). Also updated all the packages to the latest.
Adin 6 Reputation points

2021-05-06T20:06:46.377+00:00

I'm also having the same issue. Using 16.9.4
Adin 6 Reputation points

2021-05-06T20:07:26.897+00:00

I'm also having the same issue. Using 16.9.4
Tapiwa Muzira 11 Reputation points

2021-05-25T07:46:25.407+00:00

Same issue here on Windows 10. My installation is as below. Why is this issue not being fixed properly?

Microsoft Visual Studio Community 2019
Version 16.9.6
VisualStudio.16.Release/16.9.6+31313.79
Microsoft .NET Framework
Version 4.8.04084

Xamarin Forms 5.0.0.2012

Installed Version: Community
Brian Runck 6 Reputation points

2021-06-28T03:49:45.553+00:00

I believe you are talking about reports on the Visual Studio developer community site. Many issues of all sorts have this problem where they are
either providing workarounds that aren't sufficiently fleshed out and do not work, or quick to close the issues, claiming in a vague way that some sort of fix has been implemented and eventually released, and nothing seems to have changed. One example where this happened (and was eventually fixed) was the "Error adding Apple account" problem. There was very little communication from Microsoft for a long time on the issue. Staying engaged with us even before anything is fixed will go a long way towards keeping the peace and fostering good will.

The Xamarin tooling in VS has really been unstable this year and it has disrupted the "inner dev loop" such that it often doesn't "loop" at all. It's actually beyond frustrating for those of us that use Xamarin in Visual Studio as our day job.
Cezar Wagenheimer 11 Reputation points

2021-07-10T12:25:37.68+00:00

It's really broken on 16.10.3! There is no way of making it work! =(
Emil Alipiev 271 Reputation points

2021-07-25T21:17:40.83+00:00

that doesnt help after 16.10.x versions and VS mac latest. it only works on 16.9.6 as last working version.
Tapiwa Muzira 11 Reputation points

2021-07-26T06:48:51.663+00:00

The only thing that finally worked for me is doing a clean reinstall
Brian Savage 21 Reputation points

2021-07-27T02:03:07.877+00:00

I am using Windows VS 16.10.4 Xamarin 5.0.0.2083 i.e latest versions. All other Nugets are up to date.

Hot reload works fine on the Main Page, but not on any subsequent modal pages.

V annoying.
adinas 1 Reputation point

2021-07-27T06:12:23.657+00:00

I'm pretty sure the team is only working on .MAUI at this point. Don't expect any updates or fixes for Xamarin.
We can only hope that in .MAUI this feature works without all the unreliably.
Emil Alipiev 271 Reputation points

2021-07-31T14:10:13.583+00:00

I dont really mind that they work for MAUI but problem is they break the working things. I have rolled back to 16.9.6 version and Hotreload works fine on Android there. IOS is totally broken. I mean what kind of developer cannot rollback a breaking change.

3 answers

Willem van Rumpt 16 Reputation points

2021-03-24T07:32:58.11+00:00

Fixed in 16.9.2 (for me at least)
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Brian Runck 6 Reputation points

2021-06-28T03:41:02.167+00:00

I found XAML Hot Reload on iOS to be completely broken in 16.10.x, it initializes but never does anything. Found the same behavior with 16.11 preview 2.0.
Was able to test it using an old version of 16.9.0 and both updating on changes and updating on save worked just fine. Upgrading that version to 16.9.8 (which was the last version of 16.9 released) has updating on changes as broken but will work and update on save (if you have your settings configured to do so).

All tests were performed using the exact same solution with the exact same project options (linker set to Don't Link, etc.)

So this functionality has deteriorated over time; first "update on changes" broke sometime between 16.9.0 and 16.9.8, and now in 16.10.x and later both "update on changes" and "update on save" are completely broken regardless of settings. It's not clear this is getting onto the radar screen of the people that need to know about it.

Emil Alipiev 271 Reputation points

2021-07-25T21:13:11.687+00:00

It works on VS Windows 16.9.x but after 16.10.x VS team messed up again and not working.

Emil Alipiev 271 Reputation points

2021-07-25T21:14:34.003+00:00

not only IOS but also Android if you are on Windows VS 2019. last working version is VS 16.92. I downgraded and works again on android but Ios no chance.
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Stefan Bogaard 1 Reputation point

2021-07-30T12:23:24.933+00:00

Switching back to reload full page fixed it for me
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Brian Savage 21 Reputation points

2021-07-30T22:10:05.61+00:00

Tried that

Didn't work.

I cannot believe how much time this feature saved when it worked. And they have disabled the xaml editor which would have helped.

Emil Alipiev 271 Reputation points

2021-07-31T14:08:49.857+00:00

only solution is to going back to 16.9.6 version on windows. On Mac i have no solution. for Ios is totally broken probably connected to Xcode also

Brian Savage 21 Reputation points

2021-07-31T23:51:57.383+00:00

Unfortunately, as a sole developer, I am using the community version, and no rollback is allowed.

I understand MS need to make money and am grateful for the free use of some fantastic software from which I can earn income, but at least we ought to be able to uninstall some versions if they are breaking.

Emil Alipiev 271 Reputation points

2021-07-31T23:54:47.39+00:00

ah, you are right, i never knew that there is no download link for older version of VS2019 community but only proffesional and enterprise.
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Brian Savage 21 Reputation points

2021-07-30T23:24:11.16+00:00

This may help.

I updated all the Android tools in the sdk manager to use the latest versions, and also removed all old versions.

Cleaned solution and restarted VS.

I am using full page reload rather than changes, and it now works. Although I won't be surprised if it stops working again!
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