Develop Reference

Android App not loading in Emulator after Android Studio 2.3 Update

I have just uploaded my Android Studio version to 2.3, and I am now having problems testing my app in my emulator. It is a Nexus 5X emulator with Android 7.0 Nougat loaded on it (API 24), with an ABI: armeabi-v7a (I have an AMD processor, so to the best of my knowledge I can only use this). Before, it was a bit slow and would sometimes come up with a 'Not Responding' error, but clicking 'Wait' would always do the trick.
After the Android Studio update, when I press 'Run', it opens up & boots the emulator. However, once booted, it gets stuck on the "Launching App - Installing APKs" process. It probably shows that it is doing this for about 2 minutes, before stopping. It then shows "Launching Instant Run Service" for a few seconds. The green 'run' arrow then becomes active again, as if there is no emulator open. The emulator is open, but there is no app. If I click the green 'run' arrow with the emulator already open, it does a gradle build sync & then doesn't even attempt to launch the app/install APKs - it only says "Launching Instant Run Service" for a few seconds, even though nothing happens.
I have tried removing the emulator & recreating it, and I have also tried fiddling with some of the parameters as suggested in other posts which concern similar (but not identical) issues to this. The first time I tried to run the app on the emulator after the update, I had many messages pop up in the event log, saying Android Studio Can't Bind to Local 86xx for debugger, whilst the Android Device Monitor was opened. Ever since then, with the ADM closed, I have had the problem described above, with no error messages showing in the error log.
Any help with this issue would be very much appreciated - please note it concerns the very latest version of Android Studio which I have only just had a popup requesting that I install. Build Tools Version in build.gradle has also been updated from 24.0.2 to 25.0.0.

If you haven't already done it:
Open Tools -> Android -> SDK Manager
Select tab SDK Tools, flag Android Emulator (version 27.0.5 at the moment) and Apply
This solution worked for me, hope this can help

I tried all of the aforementioned and it didn't help. What helped was disabling Instant Run in Settings -> Build, Execution, Deployment -> Instant Run.
Relevant issue in AOSP bugtracker: https://code.google.com/p/android/issues/detail?id=235879

Updating the Java SDK solved the problem for me.

you need to download the Android Emulator for Android Version 2.3 or make sure when you updated your AS from 2.2 to 2.3 all these components got updated and installed. I had the same problem and i just downloaded the Android emulator and it worked fine for me.

had the same problem, after two days of trying to solve this, i decided to uninstall android studio, and then install the new virsion 2.3 all over again, now Emulator working just fine!
*not much of programming, but it did the job!

Don't worry about updating anything. For some reason upgrading to 2.3 makes the default setting for running your app set to "androidDependencies" which does nothing except give you strange errors. Just go to Run -> Edit Configurations and in the window that pops up try to delete with the minus symbol the selection on the left pane with the task called android dependencies. Then click on "app" under the "Android App" expandable arrow at the top. (see the pic)
edit configuration window

I recently download Android Studio 2.3 and installed default components and some Android OS for emulator. When I use an emulator (version 26.0.0) I have problem with its sound and image (display is very poor).
I'm using Ubuntu 16.04.2, Kernel 4.8 and KVM is setup.
It's an example of my problem:

I think you've not enabled the developer settings in your emulator. Sometimes after update the emulator is reset and all the settings are lost. Enabling it, should solve the problem.

Why emulator or Genymotion is unable to run my app properly?

I am using Genymotion for personal use to test my apps.However, the emulator opens up, displays everything fine.As soon as I run my app, it hangs or crashes.Same is happening when I use default android emulator.Also its taking quite too long to open my default emulator.I checked HAX on console and it is running fine.My system RAM is 8Gb.It appears to me some memory like issue but cannot figure it out exactly.

I had the same problem with ...
The solution that worked for me with x86 emulator was to update HAXM with the last version and to restart my computer.
http://software.intel.com/en-us/android/articles/intel-hardware-accelerated-execution-manager
may be this also works for you
The root cause was a missing video driver (the vanilla Microsoft one wasn't enough). I was working with a cobbled-together frankenbox and found it useful to follow the instructions on finding the right driver here:
http://support.amd.com/en-us/kb-articles/Pages/HowtoidentifythemodelofanATIgraphicscard.aspx#DID
I hope it helps

App not run in visual studio emulator for android in visual studio 2015

I create blank xamarin android project without add any code when i debug this project debugging without problem but when i run app with visual studio emulator for android emulator is running but not starting my app and deploy failed and don't show me error
why ?
please help me

I had the same issue. VS 2015 can launch the VS emulator but can't deploy the app.
I was able to solve the issue like this:
Launch the emulator (F5 in VS, then cancel the deployment using the Build/Cancel menu)
Click on the chevron icon (») in the toolbar to the right of the emulator
Select the Network tab
Locate the preferred network ip address
Back in VS, click on the Open Adb Command Prompt toolbar button
Type adb connect [the emulator ip address]
Press F5 again in VS
Looks like a VS bug to me.

I had the same issue. It turned out the root cause was that the VS Emulator couldn't find adb.exe.
When that happens it won't connect to the emulator unless you do the manual connection following the steps CSharpRocks gives. The emulator also won't be listed under "adb devices".
The fix for me was to reinstall the Android SDK, using the Windows EXE based installer (not the zip installer). The EXE installer sets the HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Android SDK Tools key, Path value, in the registry, pointing to the Android SDK root directory.
The VS Emulator uses that registry setting (or the Android Studio install registry setting) to find the SDK, assuming you didn't install the Android SDK with Visual Studio itself. With that, it should be able to find adb.exe and work.

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”

I'm having a very similar issue. I have found two different kind-of-work-arounds, but have not yet figured out a full solution.
Start the emulator before trying to deploy to it
Launch the Visual Studio Emulator for Android application from the start menu.
Launch one of the available emulators via the green arrow
Attempt to again launch your application from visual studio, selecting the VS Emulator N-inch... emulator from the drop down menu
For me for some reason the app still doesn't "launch" on the emulator, although it is installed. So I have to open the application menu and select my app. Additionally it will usually crash the first several times I try to open it, but eventually displays my single default label, Welcome to Xamarin Forms!.
Run the application in Ad-Hoc mode
Before running the application, change the solution configuration (from the top toolbar next to the green "run" button) to Ad-Hoc.
The problem with both of these methods though is that I'm still not able to actually debug an application. I can run it, but my breakpoints are ignored and I think that will make finding bugs difficult once I actually start to write a real application.
I hope to update this answer once I figure out an actual solution.

I had the same problem yesterday. The problem appeared (probably) because I tried to start development after a long break. I updated VS and everything, but faced many issues.
Eventually you need to start fresh
Make sure SDK for emulator points to the right place (HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Android SDK Tools)
Run Visual Studio with Administrator privileges
Go to Hyper-V Manager and delete ALL Virtual Switches - let the system recreate them when needed. It will do it properly
Delete all existing emulators and recreate them in Visual Studio. I even found a comment to name them without spaces - not sure if it is needed, but wouldn't hurt.
Doing all this helped me. But I was on the verge of reinstalling Windows 10 clean. I think lots of things and configuration changed and are no longer compatible.

Try it enabling Hyper-V and using a Visual Studio Emulator from android; that worked for me after a lot of attempts and research

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". This leaves a version of the app on the device which seems to block further attempts at debugging or deploying.
I solved it by starting the emulator, going to "settings -> apps" and manually uninstalling my app. Then the next debug build & deploy worked again.
You could probably also manually start the emulator and say "wipe device" option so it starts fresh.

In VS2017, on a Windows10 machine, all I had to do to get the app to show up was turn off Mobile Data.
(swipe down or use settings, then click Mobile Data and confirm to turn it off).
After I turned it back on, I could access the app. Before doing this, it always seemed that the emulator ran, but wouldn't run the app.
... no idea why this worked, but I'm posting it here in case it helps someone.
During my troubleshooting process, I also looked at these articles:
VS Android Emulator wont run application
Troubleshooting the Visual Studio Emulator for Android
Update Your Path For The New Android Emulator Location

Install apache in VS 2015 here.
Visual studio requires apache to develop android apps.
You also may want to look at some other suggestions:
notshowing, troubleshooting

I had such issues before with the android SDK emulator, now I'm using Genymotion emulator instead of it, it is more light and faster and will be detected automatically by you VS once launched.
you can download the free version from here : https://www.genymotion.com/
and also you can download any device emulator.

Android Studio emulator appears in the task manager for 10 seconds and disappears. The emulator window is never displayed

It was working fine till I updated the Android SDK tools from the SDK Manager to version 24.1.2. However a virtual device was running at the time of the update and it asked me to close 3 processes in order for the update to continue. I thought the virtual device was interfering so I closed it and tried to proceed with the update,it gave me the same error. Therefore I cancelled the update and closed the studio. After restarting the studio,it gave an error saying the SDK could not be found and would not let me do anything else. I uninstalled the studio after deleting the SDK folder and reinstalled it. I downloaded the system images needed for the virtual devices and some other packages and created a new virtual device. When I tried to run the application,it gave me the dialogue box to chose the virtual device,I chose the newly created one and it gave the command to start the device. Yet no emulator window for the device appeared.
D:\sdk\tools\emulator.exe -netdelay none -netspeed full -avd MTK
emulator: device fd:5500
HAX is working and emulator runs in fast virt mode
HAXM is installed and it worked fine before. On checking the task manager upon launching the application,an emulator-x86.exe process appears briefly before disappearing. Nothing happens after that. Launching the program again gives the same result. If I try to launch the device from the AVD manager,I get the same result. I have tried using the arm images,varying the ram size,snapshot enabled/disabled,use HOST GPU enabled/disabled,system restarted,removal of /.android content,setting up the SDK in a different drive and deleting the ANDROID_SDK_HOME system variable and resetting it.
I have also tried with Genymotion. The virtual device window briefly appears and I can the see the android logo at startup but then it says "player.exe has encountered a problem and needs to close. We are sorry for the inconvenience." I have tried it using both the Genymotion Android SDK tools and the custom Android SDK tools to no avail. If I try to delete the device it says please stop the virtual device before deleting it even though it is not running.

I spent most of my day trying to solve exactly the same problem until one of my colleagues remembered he had exactly the same issue and that was related to Docker.
Docker uses Hypervisor Framework which is incompatible with the HAXM used by the Android emulator. Therefore if you try to run the Android emulator while Docker is running it will just quit without a warning. Quitting Docker will allow to use the simulator - Docker for Mac conflict with Android emulator

Sometimes it is because you are low on memory, or it might be an AVD specific glitch. I had many (20) devices saved in my AVD and was lower than normal on memory on my laptop. The native emulator folder would disappear right away but genymotion worked fine.
I removed the old devices and create a new one from scratch in AVD and the problem disappeared.

Android Emulator won't launch, no console output or errors

I am trying to run the Android emulator on a 64 bit Windows 7 machine. I have installed the Android SDK, JDK, Eclipse, and the Android plugins for Eclipse. From the SDK Manager, I have installed the Android SDK Tools, as well as all of the files for Android 4.1 (API 16).
From Eclipse, when I want to open the emulator I select the AVD Manager and click on a device that I have created. The AVD Manager says that the virtual device is a valid device. When I launch the machine, a box pops up that says "Starting Android Emulator," and there is a loading bar right below it. The bar will get to about 95%, and then the box will disappear and nothing will happen. There will be no errors and no messages in the console output box in Eclipse. I get similar behavior when I try to launch the emulator by running an app from Eclipse.
I have tried uninstalling and reinstalling the SDK to a new directory, as well as downloading a different version of Eclipse (I am currently using Eclipse Java EE, earlier I was using Eclipse Classic 4.2). I also tried downloading the API 15 platform and using that as a virtual device, and I still have the same issues.
I have checked my task manager, and the only new process that is ever created is adb.exe, and this only happens when I try to run my app, but not when I start the emulator on its own.
Any idea what might be causing this, or what methods I might use to troubleshoot this that will actually give me some kind of error message, rather than just disappearing and not doing anything? Thanks.
Edit: When I try to run the emulator from the AVD Manager directly, I get the same behavior as when running through Eclipse (loading box pops up, then disappears, then nothing).

Try to use BlueStacks emulator instead standart. It work much more faster and reliably. You can download it from http://bluestacks.com. After installing reboot the system. I think all be fine.

I had the same problem. Enabling Host GPU emulation worked for me.