Xamarin.Forms Errors (ADB0000:Value Cannot be null)

8
votes

What does this even mean? I had my program running and deploying fine and then the next day this error popped up?

Severity Code Description Project File Line Suppression State Tool Error ADB0000: Value cannot be null. Parameter name: path2 at System.IO.Path.Combine(String path1, String path2, String path3) at Xamarin.AndroidTools.PlatformPackage.GetVersionInfo(String frameworkVersion) at Xamarin.AndroidTools.PlatformPackage.GetPlatformPackageVersion(Int32 apiLevel, String& packageName) at AndroidDeviceExtensions.d__33.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at AndroidDeviceExtensions.d__27.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Xamarin.AndroidTools.AndroidDeploySession.d__101.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Xamarin.AndroidTools.AndroidDeploySession.d__99.MoveNext()
0

I was trying to follow an online YouTube tutorial (https://www.youtube.com/watch?v=eAZ4kPf5eTc) and it worked fine until I got this error?

4
c#xamarin
Show the code that causes this error, also mentioned the values that you are having for those variables - sujith karivelil
Have you tried another device or AVD? - Cheesebaron
This started occasionally happening to me after I upgraded vs2017 from 15.7.6 to 15.8.9. My solution was to simply deploy to my android device again, and then it worked. I consider myself amply blessed because it's a minor issue for me - which certainly has not been the case when upgrading Visual Studio in the past. On a related note, if you ever upgrade to a version of Visual Studio that's broken, I've found that (for me) it is easier to restore from a bare-metal backup than to reinstall from scratch. - Code4aliving

4 Answers

10
votes

I just had the same issue. The fix for me was: In Android emulator hold the app icon and move it to uninstall. Rebuild, deploy and run from VS 2017.

3
votes

I had the same issue, Here is how i fix this error

1-Delete bin and obj folder from all projects.

2-clean and rebuild whole project.

3- Uninstall the app from emulator (device).

Run the project.

2
votes

Updating nuget fixed my problem. For me root cause was Xamarin forms was not working due to the older versions of xamarin dlls. I updated all the dlls and worked.

0
votes

Go to developer settings and disable verify apps via USB. Then you can install .apk without any problem.