Cannot launch Android Emulator visual studio 2019 - xamarin

After installing windows 10 update whenever launching an android emulator I get
Could anybody advice what do to? How do you reinstall the sdk,remove it
many thanks

Try the obvious first - restart the Visual Studio and the PC.
If that doesn't work then try selecting Tools->Android->Android Device Manager and play around from there. Try creating a new instance of a different device. Google Pixel or Nexus for example.
Try different options from there.

Related

How do I manage pairing Visual Studio to multiple Mac's?

I work from home and for my job I am using Visual Studio 2022 on Windows paired to a MacinCloud running Big Sur using my company's Apple Developer account for Xamarin development.
In the evenings, I'm playing with MAUI so I'm running the Visual Studio 2022 "Preview" version and I have my own Apple Developer account and my own separate MacinCloud running Monterey.
When I open Visual Studio (either version) it looks like it just tries to pair to the last Mac I used and then it also tries to install updated SDK's etc. if necessary.
How do I manage this? Ideally I want to stop it from auto-pairing and then choose the correct Mac each time.
Thanks in advance,
Paul Lonsdale.
You can open Tools - Options - Xamarin - iOS Settings on Visual Studio on Windows computer. On the Pair to Mac dialog window select "Forget this connection" (right click context menu on the connection).
This isn't really an answer but a workaround. The issue only really happens when both macs are running which is rarely the case. I will, in future, make sure that only the mac I need for the project I am working on is up and running. That way even if VS tries to connect to the other one it will fail.

Deployment error in Visual Studio 2015 while running Xamarin app

I am running visual studio application on genymotion virtual machine. But it shows deployment errors while debugging. It seams it is something with the emulator. I know there are similar questions but none of them solve the problem. Anyone for help?
error occurred:
A numeric comparison was attempted on "$(_DeviceSdkVersion)" that evaluates to "" instead of a number, in condition "$(_DeviceSdkVersion) >= 21".
Solved ( genymotion users)
Go to Genymotion select the virtual device you are using.
Settings>>ADB>>Select the option "Use Custom Android SDK tools">>copy and paste the same location your sdk (like in Visual Studio >>Android Settings >>Android SDK Location
restart genymotion. It worked for me!
Solution actual for emulator, but not for devices. Solution for devices - kill all shuame_helper.exe processes, that takes TCP-port which is required to poll the device's SDK version... Shuame_helper.exe raised every time you reconnect your device to PC..
I seams the problem is with genymotion: there are different paths of SDK path in visual studio and genymotion.
Solution:
First go in Visual Studio-> Tools -> Options. In options choose Xamarin->Android settings. Copy the path in part: Android SDK Location.
Then open genymotion. Choose virtual machine that you will be using. Than settings->ADB-> use custom Android SDK tools, and paste the path there. If you get message that says Android SDK tools found successfully. Close the window and then restart Visual Studio and run your application again.
For more details look at this link
http://enblog.clock-up.jp/entry/2016/06/26/xamarin-android-device-sdk-version-error

Deploying to Windows Phone 10 fails on Visual Studio

So many things happened that I don't know where to start. Seriously, shouldn't this be simpler?
Edit: Someone here knows how can I contact Microsoft to tell this? Or even, can someone tell them about this problem?
I have the last Windows 10 desktop and also have Windows Phone 10.0.10512.1000. I installed Visual Studio 2015 with tools for Universal Apps development (and also 8.1). I have a Lumia 730.
So I connected my phone with my USB cable. Everything fine, the phone gets recognized and I can navigate through the folders.
Then I started Visual Studio 2015 and created a blank universal app. Compiled and tried to deploy. Now this is happening to me: Visual Studio hangs for some moments. Eventually I get an error telling that the device was not found (DEP6200).
I already tried dozens of solutions:
disconnecting from wifi in my laptop and my phone
restarting the IpOverUsbSvc service
rebooting the computer and the phone
deleting the devices in the Device Manager
Registering and Unregistering the phone (it sometimes works)
All of the above with the phone screen unlocked
disabling Hyper-V
disabling firewall
Other solutions that failed miserably
I also tried to use that Windows Phone Developer Power Tools. When I try to use it, it asks me to install some "Phone Tools Update Pack", but when I try, it says that the operation didn't succeed, and also shows the NRE message string (object reference not set to an instance of an object).
I can go through the phone's folders without any problem. I tried to reinstall the drivers... i tried everything.
It's quite sad.
Do you guys can think of some more thing to check?
EDIT: I tested this app before doing all this: https://blogs.windows.com/buildingapps/2015/07/09/just-released-windows-10-application-deployment-tool/
And it worked. If that's the case, is Windows Phone 10 deployment over Visual Studio working already or we have to wait some more time?
Edit2: After making some changes to my app manifest and choosing "ARM" config, now I get this:
1>Deploying to SD Card...
1>Updating the layout...
1>Copying files: Total <1 mb to layout...
1>Checking whether required frameworks are installed...
1>Framework: Microsoft.NET.CoreRuntime.1.0/ARM, app package version 1.0.23117.0 is not currently installed.
1>Framework: Microsoft.VCLibs.140.00.Debug/ARM, app package version 14.0.23019.0 is not currently installed.
1>Installing missing frameworks...
But it just stays there. It's stuck, and it stays there forever. At least I got some info... Its more or less the same steps that WinAppDeployCmd does, but the command line app does it successfully.
Somehow the problem got solved. I created a brand new project and did this:
1 - In your phone, try disabling the developer mode on your phone. What an unexpected development!
2 - Disable the "phone discovery" thingy. I don't know the name of this configuration in english (as my phone is in Portuguese). Just in case.
3 - Choose the correct architecture. This is obvious, right? In my case, ARM. If you try deploying with x86 or x64, it should give you an error. For me, it didn't.
From now on, you should be able to deploy your apps in both developer mode and non-developer mode. It just works, somehow. And it might NOT work for you, sorry. I think I got lucky.
It worked even after a reboot. So the solution is "pretty solid" (in an universe where gelatine is pretty solid).
I had the same problem. I tried the fix of the comment and went to devices manager.
Under USB-Devices there were three Lumia 920s listed.
I selected the second one and clicked on uninstall.
At the end it asked me to restart the Computer. I clicked on NO.
(When I uninstalled the first or third one, it didn't ask me that).
Then the error disappeared (now another common one appears (HRESULT: 0x80073CF6))
I have a Lumia 950 xl, with windows 10 installed, anniversary version. I had the same problem, and my solution was to turn on 'Device discovery' and 'Device Portal', and also keep the 'Developer mode' on.
I believe the only necessary option was the 'Device discovery' though!
Just in case someone still runs into this issue, I had something very similar with my Visual Studio 2015 professional update 1 but I couldn't even deploy to an emulator.
The issue has gone after I upgraded to Visual Studio 2013 update 3.
I had the same issues on Windows 10 with Visual Studio 2015. I updated the the UWP SDK to Anniversary Edition Build 14393, set the target framework to this and it worked. I guess the incompatibility between the device version and sdk version was not allowing the device to be discovered by Visual Studio.

Can't create a UWP app

I recently, upgraded to Windows 10 and got Visual Studio 2015 Community hoping to build UWP apps and ASP.Net 5 apps. At first, I installed everything, but ended up skipping / canceling the Windows 8.1 / 10 mobile emulators (my PC can't even run them). After everything was installed, I went to create a new UWP app (C#), and got this error:
Next, I try the same thing, but with JavaScript. It works perfectly! on the same UAP 10.0.0.0 that is supposedly missing. The link it provides is completely useless (it sends me to http:/microsoft.com/en-us) -_-. Oddly, this only happens when I try to use C# or VB.Net, JavaScript UWP apps seem to work fine. What is going on here? Where can I find the real link to the SDK I need?
UPDATE
JavaScript UWP apps will be create just fine, but when I attempt to build, I get:
Error "10.0.0.0" is not a supported value forTargetPlatformVersion.
Please change it on the Project Property page. Test
C:\Program Files (x86) \MSBuild\Microsoft\VisualStudio\v14.\JavaScript\Microsoft.VisualStudio.JavaScript.UAP.targets
This is the download link for the standalone SDK, maybe reinstalling the sdk will fix the problem.
https://dev.windows.com/en-us/downloads/windows-10-sdk
Normally you don't always have to reinstall visual studio when something goes wrong because it takes a lot of time to reinstall again. From your question you skipped/cancel that feature, the first thing to do is go to the control panel and double click on visual studio under programs to Modify the software and enable those features.
In the case, visual studio was working properly before but due to some updates it stopped, go to control panel right click the visual studio version you have under programs to repair.
If the above doesn't work try to reinstall it again. I hope this helps.

Deployment of application to device failed Visual Studio 2013

I'm trying to develope my first Windows Phone 8.1 app in Visual Studio 2013 Ultimate (Update 2). I've registered developer account and my phone, Lumia 635, is also activated. My OS is Windows 8.1 Pro x64. Both OS and Visual Studio are clean installed just few days ago. My phone is plugged into USB-port and I can see it in file explorer.
I've tried different USB-ports, not different USB-cable tho, also tried to google for solutions, no help.
I've followed exactly these orders to point where I am now: https://msdn.microsoft.com/en-us/library/windows/apps/ff402526%28v=vs.105%29.aspx
Code builds fine but when I try to deploy it comes this:
1>------ Deploy started: Project: firstapp, Configuration: Debug Any CPU ------
1>Deployment of application to device failed.
1>Error: Value cannot be null.
I cannot emulate project either, it just shows Start in menu with green arrow, nothing more.
Is my best guess to reinstall everything and try again?
Okay, I got it solved already. I'm not sure what actually fixed it, creating new WP 8.1 app project or installing some SDKs. Only thing matters is that its now working. :)

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