Unable to start emulator from VS Code

[HobDev]

Type: Bug

Getting the following error when trying to debug a new .NET Mau project.
[{
"resource": "/usr/local/share/dotnet/packs/Microsoft.Android.Sdk.Darwin/35.0.7/tools/Xamarin.Android.Common.Debugging.targets",
"owner": "maui",
"code": "XA0010",
"severity": 8,
"message": "Selected device is not running.",
"startLineNumber": 333,
"startColumn": 5,
"endLineNumber": 333,
"endColumn": 5
}]

Extension version: 1.5.34
VS Code version: Code 1.95.3 (Universal) (f1a4fb101478ce6ec82fe9627c43efbf9e98c813, 2024-11-13T14:50:04.152Z)
OS version: Darwin arm64 24.1.0
Modes:

System Info

Item	Value
CPUs	Apple M2 (8 x 2400)
GPU Status	2d_canvas: enabled canvas_oop_rasterization: enabled_on direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok skia_graphite: disabled_off video_decode: enabled video_encode: enabled webgl: enabled webgl2: enabled webgpu: enabled webnn: disabled_off
Load (avg)	3, 3, 3
Memory (System)	8.00GB (0.43GB free)
Process Argv	--crash-reporter-id 421570d0-a5c4-4849-848c-c96780d2457e
Screen Reader	no
VM	0%

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[mauroa]

Hi @HobDev,

Did you try manually starting the Android emulator and see if it runs correctly? Also, could you try creating and running another emulator and see if it makes any difference? Thanks

[mauroa]

Assigning to @tondat to take a first look, related to #1661

[tondat]

@HobDev in order to understand the issue please share the following information:

1. was the emulator launched by vscode or it was launched from a different tool or from terminal?
2. set the Debug Verbosity to diagnostics, that will generate the binlog (on root solution folder) for the build:

3. try repro (debug the app)
4. run on terminal the command: '{Your android-ask path}/platform-tools/adb devices'. That provide the information about the status of emulator (detected/connected to adb).
5. attach the binlog and the result of the command
6. if the emulator is running (you can use it), and you retry the debug. Debugging works?

We look forward to hearing from you!

[HobDev]

@tondat
I can debug the app when the emulator is running. I installed the emulator from command line and start it from command line too using the command emulator -avd name-of-your-emulator. Actually this is feature request which is similar to #1661.

The binlog file from the solution when I debugged without starting the emulator:
msbuild.zip

Run the abd devices command in the platform-tools folder of Android sdk. The result is below:

C:\Users\spara\AppData\Local\Android\Sdk\platform-tools>abd devices
'abd' is not recognized as an internal or external command,
operable program or batch file.

[github-actions]

@mauroa, the 'needs-more-info' label has been removed upon receiving further response from the original bug filer.

[tondat]

@HobDev please try run './adb devices'.

The bug was reported on MacOS.
You are trying the repro on windows now?

[HobDev]

@tondat

The binlog file from the solution when I debugged without starting the emulator on macOS:msbuild.binlog.zip

Run the abd devices command in the platform-tools folder of Android sdk on Windows as well as MacOS. The command return the following text without any devices name.

List of devices attached

[HobDev]

I deleted Android SDK and emulators from my Mac and reinstall it using Android Studio. Now I able to start the emulator from the VS Code. I don't know the actual cause due to which the emulator was not starting from VS Code previously. But it's working fine now after installing Android Studio.

[tondat]

@HobDev

The reported build error
"XA0010: Selected device is not running" is because the emulator that you are trying to use is not connected to ADB.
The MSBuild parameter "AdbTarget = -s MyAndroidVirtualDevice-API35" has an invalid value, it has the name of the emulator, but the Android target wait the id assigned by ADB when the emulator is running.

The command adb devices confirm that the emulator is not running (empty result).

I need the following information to understand how you arrive to this situation:
1- how are you set the debug target? are you using the debug target picker or are you using a static value on ".vscode/launch.json" file?
2- how are you launching the emulator? vscode debug process (when you press F5) automatically launch it or you are launching the emulator from terminal?
3- please attach the '.NET MAUI' output content.

[HobDev]

1- I am using debug target picker ({}) in the Status Bar to set the debug target and startup project
2- I am launching the emulator from Debug Button in the Run and Debug View of the Activity Bar.
3- The .NET MAUI out put content is pasted below:

ANDROID ENVIRONMENT STATUS: 09/01/2025, 08:59:18
 
Here is the status of your Android development environment:
 
Required components:
 
	✓ Java SDK - INSTALLED (version '17.0.13')
		- Path: '/Library/Java/JavaVirtualMachines/microsoft-17.jdk/Contents/Home' (VSCode settings)

	✓ Android SDK - INSTALLED
		- Path: '/Users/paramjit/Library/Android/sdk' (VSCode settings)
 
		✓ platforms/android-34 - INSTALLED (version '3')
		✓ build-tools/34.0.0 - INSTALLED (version '34.0.0')
		✓ platform-tools - INSTALLED (version '35.0.2')
		✓ cmdline-tools/11.0 - INSTALLED (version '17.0')
 
Optional components:
 
	✓ Android Virtual Device (AVD) - COMPLETE
		- AVD Path: '/Users/paramjit/.android/avd'
		- AVD devices - DETECTED ('Pixel8API34','MyAnroiVirtulDeice-API35')
 
		✓ emulator - INSTALLED (version '35.2.10')
		✓ system-images/android-34/google_apis/arm64-v8a - INSTALLED (version '14')
		✓ system-images/android-34/google_apis_playstore/arm64-v8a - INSTALLED (version '14')
		✓ system-images/android-35/google_apis/arm64-v8a - INSTALLED (version '8')
 
IMPORTANT:
- If you are sharing the Android SDK location with Android Studio, the recommended way to install/update the SDK and accept licenses is by using Android Studio.
 
 
Xcode:
	- Path: /Applications/Xcode.app
	- Discovered from: xcode-select -p
	- Installed: true
 
No compatible .NET runtime found. Minimum required version is 8.0.3
Failed to find a compatible .NET runtime, falling back to acquire it via ms-dotnettools.vscode-dotnet-runtime. See the .NET Runtime output for more information
Using .NET runtime: '/Users/paramjit/Library/Application Support/Code/User/globalStorage/ms-dotnettools.vscode-dotnet-runtime/.dotnet/8.0.11~arm64'
ANDROID ENVIRONMENT STATUS: 09/01/2025, 09:03:46
 
Here is the status of your Android development environment:
 
Required components:
 
	✓ Java SDK - INSTALLED (version '17.0.13')
		- Path: '/Library/Java/JavaVirtualMachines/microsoft-17.jdk/Contents/Home' (VSCode settings)

	✗ Android SDK - UPDATE REQUIRED
		- Path: '/Users/paramjit/Library/Android/sdk' (VSCode settings)
 
		✓ platforms/android-34 - INSTALLED (version '3')
		✓ build-tools/34.0.0 - INSTALLED (version '34.0.0')
		✓ platform-tools - INSTALLED (version '35.0.2')
		✓ cmdline-tools/11.0 - INSTALLED (version '17.0')
		✗ ndk-bundle - NOT INSTALLED
 
Optional components:
 
	✓ Android Virtual Device (AVD) - COMPLETE
		- AVD Path: '/Users/paramjit/.android/avd'
		- AVD devices - DETECTED ('Pixel8API34','MyAnroiVirtulDeice-API35')
 
		✓ emulator - INSTALLED (version '35.2.10')
		✓ system-images/android-34/google_apis/arm64-v8a - INSTALLED (version '14')
		✓ system-images/android-34/google_apis_playstore/arm64-v8a - INSTALLED (version '14')
		✓ system-images/android-35/google_apis/arm64-v8a - INSTALLED (version '8')
 
IMPORTANT:
- If you are sharing the Android SDK location with Android Studio, the recommended way to install/update the SDK and accept licenses is by using Android Studio.
 
ACTION REQUIRED:
✗- Android SDK - Ensure that the required Android SDK components are installed: "ndk-bundle".
	1. Install the Android SDK components:
		- From the command palette, choose '.NET MAUI: Configure Android', select 'How to configure Android', and follow the instructions.
		- Alternatively, you can try installing the components by opening a Terminal, navigating to directory '/Users/paramjit/Library/Android/sdk/cmdline-tools/latest/bin' and then running: './sdkmanager "ndk-bundle"'. Then, from the command palette, choose '.NET MAUI: Configure Android', and 'Refresh Android environment'.
Take into account that the .NET MAUI Android SDK recommends specific component versions and if you decide to not use them the building and debugging may not work well.
 
 
Emulator Pixel 8 API 34 (identifier: emulator-5554) is running.

[HobDev]

@tondat
I didn't understand the two issues in the above output.
1- No compatible .NET runtime found. Minimum required version is 8.0.3- I have installed .net 9 sdk and it should build and run the .net 8 project.
2- ✗- Android SDK - Ensure that the required Android SDK components are installed: "ndk-bundle". - the NDK (Side by side) version 27.2.12479018 is already installed from Android studio