Windows 8.1
Visual Studio 2015 RC
Android Application API Level 21 (Xamarin.Android v5.0 Support)
I recently had to rebuild a new PC as my old one had major problems. On this new PC, the project compiles and the emulator launches. However, during the emulator OS load screen I receive a message stating:
"This pre-release version of the Visual Studio Emulator for Android will expire in 3 day(s), 13 hour(s). Please upgrade to a newer version."
After I click "OK" the emulator OS finishes loading and I receive the message "2>Emulator launched successfully." in the Visual Studio Output window.
On my previous PC I did not receive the pop during the emulator's load and after the emulator finished loading it would then deploy the application to the emulator and begin debugging. However, after the emulator finishes loading on my new PC, no further output is displayed in Visual Studio and the green load bar in the bottom right corner of Visual Studio sits at about 30%.
I have been unable to find any information online related to the popup message I receive during the emulators load screen. I cannot find any update for the emulator or Visual Studio. I have uninstalled and re-installed Android Studio, Xamarin Studio, and Visual Studio twice with no change.
How do I update to the latest version?
Why would Visual Studio not deploy the project when the debugger begins?
I had the some problem, and I was able to fix it by manually running adb connect emulatorhost:5555 from the command line.
I found that I had to launch Visual Studio with elevated permissions. I changed the properties for the shortcut and checked the field "Run as Administrator" and all is well again.
Have the same Problem, elevated permissions not works. Run adb from commandline is alreay connected.
The new update from Xamiran (version 4.0.4.4), fix this problem for me. :)
Related
Problem:
Unlike other Similar Questions, in my case the Button is NOT greyed out and IT IS clickable too but nothing happens when I click it, No message, no logs, nothing .... It just doesn't open.
I tried opening just the emulator (from the drop down menu which says (NO DEVICE SELECTED) in the toolbar and it opens but It's frozen or Hanged, It's simply unresponsive.
What I have tried :
I tried restarting my PC
I tried Uninstalling (It had no Uninstall.exe so I installed Android Studio in other directory and even in that AVD was not working .... then I used it's uninstaller.exe to uninstall the older version, Then I reinstalled Android Studio in previous Directory ... yet didn't work).
What Should I do now? This problem started today itself after updating to the BEE update of Android Studio (25 Jan 2022 release)
Update : I fixed it by installing older version of Android Studio,
If anyone else is also having this issue, Roll Back to Artic Fox December Version
If you don't want to downgrade android studio, you can run a emulator device by terminal.
First, Go to emulator folder in the android SDK (for example /Users/janedoe/Library/Android/sdk/emulator/emulator), list all devices with the following command:
./emulator -list-avds
Then, execute the following command with the name of the device you want to run:
./emulator -avd Nexus_6_API_24
For more info visit the android studio documentation: https://developer.android.com/studio/run/emulator-commandline
Hi after the BEE update the device manager button stopped working with me too, you can use the Search option and type device manager to start it if you don't want to make a downgrade. don't know if there are fixes ...enter here
I am working with Ionic Cordova project and trying to run emulator. I am using trial version of windows 10 pro, till now didn't put license, it is trial only. though Android studio, Java sdk, and Android-SDK installed correctly but when trying to start emulator (for a correctly created virtual image) it is failing to start. It is visible for 1 seconds after that it is never visible. In-fact event viewer also not showing any error log. is it due to trial version of win 10 pro? I have no clue why it is happening?
I have tried by both installing hyper-v and once unstalling hyper-v, but none worked. I am not sure if hyper-v feature should be on or off. What is correct way?
How did you install the emulators and SDK exactly? What Android SDK version is the emulator based on? Are you really using Visual Studio and the Tools for Apache Cordova? What VS version, cordova and cordova-android versions?
If you see emulator icon, but don't see window, just recreate emulator. This is because of bugs with emulator position (when emulator window is off-screen).
Anyway, try recreating virtual device
I am new to Xamarin. I used Xamarin. Forms template to create a sample mobile solution in Visual Studio 2017. The process created four projects Xamarin PCL, Xamarin Android, Xamarin.iOS and Xamarin.UWP. Without making any modification to the generated solution, I am trying to run it.
The first issue is, when I set the UWP as the starting project, the Windows emulator shows up and runs the app perfectly. But when I try to do the same with Android, I get different errors at different times based on the environment changes I make. Finally, using the visual studio android emulator, the Phone UI shows up but not my app. In the background, I can see that Visual Studio completed the build process successfully without any errors but the deploy process simply hangs. I left the deploy running overnight but still running in the morning. Here is my environment.
Intel Core i7 processor
Virtualization enabled in BIOS
Windows 10 Education
32GB RAM
Hyper-V disabled in Windows
Executed bcdedit /set hypervisorlaunchtype off in the command window and rebooted.
I tried setting the above environment in different combinations but none of them seem to make the app work. When I use an android emulator from android SDK, the build process throws errors. The only emulator that even builds is the visual studio emulator. But the deploy hangs.
A second issue I have is, I have installed android SDK for version 24 and 25. But in the emulator dropdown, I can only see the emulators for 23. I checked the installation path both in visual studio and android SDK manager and they both point to the same installation folder. What do I need to make the emulators for version 24 and 25 usable?
I repeat, I did not make any change to the generated solution in visual studio before running it. I have been at it for the past three days and couldn't make it work. Please help.
I just installed Visual Studio 2017 (on Win10 15063.138) and found, like you, Xamarin projects won't deploy to Android. Here's how I got running:
Updated everything in the Android SDK Manager.
Installed the new, improved Android Emulator from MS:
https://www.visualstudio.com/vs/msft-android-emulator/
Used that to download/install an API level 23 (6.0 Marshmallow)
emulator
Started that emulator using the same tool (you'll see it running in Hyper-V Manager)
Selected same emulator in VS for deploy/debug (the emulators that ship with VS are painfully slow)
In VS, selected Android project for start-up and verified build and deploy to Android in build config mgr.
Note: MS doesn't appear to have any emulators above API level 23, so Compilation and Target settings for your Android project can be the latest, but the minimum target will have to be 6.0 (API 23).
After pulling my hair for the past few days, I finally got my Xamarin.Forms Android App to show my page on the emulator. Thanks to all the members for their suggestions. Ryan's suggestion helped a lot ( I +1ed him, thanks Ryan) but did not solve my problem. I googled further and found a suggestion that asked to change the following setting which did it for me finally. So, if anyone else get stuck like I did, please do the following (in addition to cleaning up and updating all packages):
Open up the setting for your Hyper-V vm for your emulator (while the VM is off).
Expand the Processor node on the left and click on "Compatibility".
Now put a check mark on "Migrate to a physical computer with a different processor version" on the right.
Start your emulator in the Visual Studio Emulator tool.
Now, start debug your android project in VS using the same emulator that is already running.
After a delay (there is always a delay), your app will show up on the emulator. Yey!!
I'm using visual studio 2015 update 1 with windows 10 build 10586 TH1.
also I'm using Xamarin Version 4.0.1.96.
I have created a blank Xamarin.Forms app. It deploys to Windows Phone emulators without any issue. But unable to deploy to Android Emulators.
When I start android project Android Emulator launched successfully but visual studio freeze at this step.
I've tried a lot of android emulator profiles but cannot solve the problem.
This problem only exists for Emulators and project successfully deployed on physical android device.
I have the same issue with Xamarin.Android projects.
Here is all of the text in output window:
1>Starting deploy 4.5" KitKat (4.4) HDPI Phone ...
1>Starting emulator 4.5" KitKat (4.4) HDPI Phone ...
1>Validating emulator arguments...
1>Determining if emulator is already running...
1>Preparing virtual machine...
1>Launching emulator...
1>Emulator launched successfully
Thank you in advance for your help.
I was running into the same issue with the emulator starting up find but Visual Studio getting hung on the build/deploy. Finally figured it out from here.
Visual Studio gets stuck trying to deploy the app to the emulator or the emulator does not appear as a debug target in other IDEs
If the emulator is running, but it does not appear to be connected to
ADB (Android Debug Bridge) or it does not appear in Android tools that
make use of ADB (for example, Android Studio or Eclipse), you may need
to adjust where the emulator looks for ADB. The emulator uses a
registry key to identify the base location of your Android SDK, and
looks for the \platform-tools\adb.exe file under that directory. To
modify the Android SDK path used by the emulator:
Open Registry Editor by selecting Run from the Start buttons context menu, typing regedit in the dialog box, and choosing OK.
Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Android SDK Tools in the folder tree on the left.
Modify the Path registry variable to match the path to your Android SDK. Restart the emulator and you should now be able to see the
emulator connected to ADB and associated Android tools.
The value in my registry was set to "C:\Program Files (x86)\Android\android_sdk" (or similar). Updating it to "C:\Users\{USERNAME}\AppData\Local\Xamarin\MonoForAndroid\AndroidSDK" solved it for me. (I haven't yet worried about how to make this work for all users.)
I had the same issue but in my case it was not the registry. After doing a release build, I deployed the app to the emulator device in release mode which pushes the app to the device and then effectively "disconnects". These leaves a version of the app on the device which seems to block further attempts at debugging.
I solved it by starting the emulator, going to "settings -> apps" and manually uninstalling my app. Then the next debug build & deploy worked again.
I had the same issue. After a long struggle i fixed it.
Sol 1 :
Check with the registry as mentioned by others.
**HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Android SDK Tools**
Sol 2 :
In my case there is no android-SDK tool found in registry. So you have to add the registry manually here "**HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node**"
you can add it by right click on **Wow6432Node** => **New** => **key**.
Set Key name as **"Android SDK Tools"**then right click on **Android SDK Tools** =>**New** => **String Value**
Set Name as **Path** for newly added string. Then right click on **Path** => **Modify..**
Copy the Android SDK Tools path from program files and paste in Value Data.
Now the registry is created manually. You can debug the project via emulator.
Note : Don't forgot to restart the system.
Have a look here:
Xamarin Forms Android App Crashes Running Debug with VS Android Emulator
Start the Hyper-V manager
Select the emulator you are trying to use
Right-click, hit settings
Click processor
Click Compatibility
Set checkbox “Migrate to a physical computer with a different processor version”
You do not have this issue on a laptop because its processor does not provide the new features which are unsupported by the Android Emulator for Visual Studio. The described tweak is only needed on PCs with newer CPUs.
I got round this problem by starting Visual Studio as an administrator.
I too have had weirdness with the Visual Studio Emulator for Android and visual studio appearing to be stuck at the "Deploying ..." step trying to launch the app for debugging.
What I discovered is that restarting both the emulator and visual studio seems to make things better for me once it starts to do this.
Also, when debugging an app, it seems that exiting your app normally helps compared to when using the "Stop Debugging" button.
For example, I started my app twice and killed it w/ the "Stop Debugging" button, but couldn't deploy/start the app a 3rd time w/out a restart of visual studio and the emulator.
Am using VS 2015 Community edition w/ update 3.
I just had a very interesting experience,
In my case the registry path to SDK was correct,
I had unchecked the "Use Fast Deployment" (under packaging properties in android options), and
all my efforts to reboot the PC, close VS, Close Emulator start over had failed.
However I did these two:
1 - Updated all the components in android SDK manager and restarted the PC,
2 - Disabled my anti-virus! and then suddenly VS deployed the app to the emulator!! (It was stuck in the same situation where the emulator starts and nothing happens!, I did this out of despair!)
(OS: win 7, professional, VS 2017 Community edition!)
More Details
I have been trying this for three more days
For my special case disabling the Anti Virus seems to solve the issue every single time!
The solution for me was to Check the deploy box in the Configuration Manager
This answer came from Xamarin Forum
I'm using android studio about 2 weeks and everything is going right until I try to create a new app and the android studio ask me for updates to API level 22 and I did it. After this update my emulator doesn't load my app anymore, the emulator opens but the app doesn't show up and even appears at emulator.
Log:
Device Nexus_5_API_21_x86 [emulator-5554] is online, waiting for processes to start up..
I try to uninstall and install again the android studio but even reinstalling with API level 21 keep not working.
Even the default Hello World application doesn't load and not show up at my emulator.
I had the same issue, and was able to work around it by manually starting the emulator first, then running the app and choosing the running emulator
I had this same issue with my first app on android studio 2.1.2. I just tried to run it and see on emulator screen but app didn't show up there.
Remember to check the messages panel it saying something wrong with my java version. I had installed JDK 7. I installed JDK 8 and that fixed the problem.