Develop Reference

Hardware acceleration doesn't work in Android Studio despite intelhaxm being installed

I have intelhaxm installed and use a quite new Lenovo Thinkpad. When I try to start an emulated device I get the error message:
Emulator: emulator: ERROR: x86 emulation currently requires hardware acceleration
What do I have to do to get start the emulator?
(I don't get the error message HAX kernel module is not installed that the linked question is about)

In android Studio Go to
File->Settings-->Apperance&Behaviour-->System Settings-->Android SDK-> then tap on SDK Tools and update the Intel x86 emulator Accelator

Download the HAXM manager and install it manually.
https://software.intel.com/en-us/articles/intel-hardware-accelerated-execution-manager-intel-haxm

It turns out that I had to deinstall and then reinstall HAXM. When I reinstalled it told me that there might be a conflict with Hyper-V visualisation and after I switched that off it finally worked.

Android studio unable to run emulator: Process finished with exit code 2

I am trying to use an emulator in Android Studio 3.1.4, but I keep getting the error messages:
Emulator: Could not launch
'C:\Users\Ian\AppData\Local\Android\Sdk\emulator/qemu/windows-x86_64/qemu-system-i386.exe':
No such file or directory.
and
Emulator: Process finished with exit code 2.
This happens with every device I am trying to emulate.
I tried increasing the RAM on the emulator, but it had no effect. Any insight into what my problem is would be great.

1)Lower your AVD Memory if it set to default try running below 600 MB RAM
2) Try reinstalling the Emulator sdk

This can be solved by the following step:
Please ensure "Windows Hypervisor Platform" is installed. If it's not installed, install it, restart your computer and you will be good to go.

ERROR: resizing partition e2fsck failed with exit code 8

I'm new to android studio. When I try to run my first programme in android studio on the emulator, I get this error.
I have searched through other comments and have also tried decreasing my build.gradle from 24.0.0 to 23.0.3 as shown below, but it still doesn't work. I'm running on Nexus 5X API 23.
android {
compileSdkVersion 24
buildToolsVersion "23.0.3"
}
The error shown is:
Cannot launch AVD in emulator.
Output:
emulator: WARNING: userdata partition is resized from 756 M to 800 M ERROR: resizing partition e2fsck failed with exit code 8
Hax is enabled
Hax ram_size 0x60000000
HAX is working and emulator runs in fast virt mode.
emulator: Listening for console connections on port: 5554
emulator: Serial number of this emulator (for ADB): emulator-5554

I had the same issue after updating Android SDK tools package to version 25.2.2. To fix the problem i've restarted Android SDK Manager and then created new virtual device instead of using the old one.

I know this is an "old" question, but the following command solved the problem for me:
./emulator -data /sdk/path/here/system-images/android-API/default/x86/userdata.img -avd your_avd_name
where API is the api level you want to use. I found that this is only needed for API<20
Note: I had that problem with libstdc++, so I had to use the LD_PRELOAD envvar. I removed it in the example, so for me, the complete command looks like this:
LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libstdc++.so.6 ./emulator -data /home/username/Android/Sdk/system-images/android-API/default/x86/userdata.img -avd Whatever

I ran into the same type of problem after installing an update to one the SDK platforms, except my output log contained more than complaints. It contained a possible solution to the problem. See the log below.
emulator: WARNING: userdata partition is resized from 769 M to 770 MERROR: resizing partition e2fsck failed with exit code 8
Hax is enabled
Hax ram_size 0x40000000
HAX is working and emulator runs in fast virt mode.
emulator: Listening for console connections on port: 5554
emulator: Serial number of this emulator (for ADB): emulator-5554
Your emulator is out of date, please update by launching Android Studio:
- Start Android Studio
- Select menu "Tools > Android > SDK Manager"
- Click "SDK Tools" tab
- Check "Android SDK Tools" checkbox
- Click "OK"
Emulator Android_Accelerated_x86_Nougat is running.
Waiting for emulator to be ready...
Solution 1: Update the SDK Tools
Open Android SDKs and Tools window.
Go to the Tools tab (the name of this tab has changed).
Expand the Android SDK Tools group and make sure you select the
latest available version.
Click Apply Changes.
Possible problem with this solution:
You may run into a new problem by following this solution. When you run the emulator it will do a cold boot and ask you for a decryption password. If you don't provide the right password, it will display a black screen and then tell you that the decryption failed.
So this did not work in my case, but your mileage may vary.
Solution 2: Factory reset the emulator
I don't use Android Studio. I use Xamarin with Visual Studio. Installing the Xamarin Device Manager and doing a factory reset of the emulator is what fixed the problem for me.
You should have a similar option if you are using Android Studio. But if you would like to, you can try downloading and installing the Xamarin Device Manager by Microsoft. It's an independent application that does not require installation of Visual Studio or Xamarin.

The misleading ERROR: resizing partition e2fsck failed with exit code 8 when starting an Android Virtual Device (AVD) can occur when you have an old version of Android SDK installed, but without the Android Studio. The old standalone graphical SDK Manager is deprecated as of SDK Tools v25.2.3 - running it does not report any errors, but does not properly update your Android SDK.
Use the new command line SDK Manager ./sdkmanager --update to properly update your Android SDK and the e2fsck failed with exit code 8 problem will be gone.
More information: How to update Android emulator without Android Studio?

WARNING: userdata partition is resized from 756 M to 800 M
For this warning set Internal Storage = 756 MB
error warning will be removed.

Change disk.dataPartition.size to 756M in:
~/.android/avd/your_avd_name.avd/config.ini

I had the same issue, and tried everything that is suggested above, without success.
Being desperate, I tried every menu I could find in AVD. So, I came on "show on disk" menu, at the right of the line of my device, in AVD device list.
Android Studio opened an explorer window, and showed me a directory with a name not matching my device name... Probably because I had renamed my device in AVD, and Android Studio had not reported this change on disk.
So I deleted my device, created a new one with same parameters, verified that directory and name matched, and launched the device... and it worked!!!
Hope this will be helpfull to anyone...

None of the answers here solved my issue, but I did find this after searching for a while and it solved my issue. If all else fails, check out the answer here:
Emulator: ERROR: resizing partition e2fsck failed with exit code 1

Android AVD: Not starting OS, Black Screen Only

I formatted my PC, installed Windows 10, SDK and installed API 15 and 23 with build tools. After importing my application into Android Studio I created a new AVD, please see screenshot.
I did not enable Use host GPU and the RAM is set to 1GB, with the HAXM RAM set to 2GB. I double checked the BIOS and Virtualization Settings are enabled. I have run the emulator from the command line using the following command:
emulator -avd Nexus_5_API_15 -netspeed full -netdelay none -debug-init -logcat '*:v'
There were no errors but it does seem to hang at:
emulator: UpdateChecker: skipped version check
I am currently quite frustrated and not sure how to resolve this issue. Can anyone please help.
Thank you guys in advance.

The first time you start the avd it always take a lot of time (could be a couple of minutes), did you close the avd too early?

Could not open avd_name.avd/cache.img

When i run emulator, i get the following error:
Cannot launch AVD in emulator.
Output:
Hax is enabled
qemu-system-x86_64.exe: -drive if=none,index=1,id=cache,file={path_to_SDK}\SDK.android\avd{AVD_name}.avd/cache.img: could not open disk image {path_to_SDK}\SDK.android\avd{AVD_name}.avd/cache.img:
Could not open '{path_to_SDK}\SDK.android\avd{AVD_name}.avd/cache.img':
Invalid argument
Hax ram_size 0x40000000
HAX is working and emulator runs in fast virt mode.
Error accepting connection, aborting
AVD specs are:
OS: Android 6.0 Google APIs
RAM: 1GB
Resolution: 1440x2560
Running on Android Studio 2.0 Beta 6, Windows 10.

Keep an eye out for a background qemu-system-i386.exe process running in the background that will be locking the cache.img file.
This might be still running from a previously failed emulator launch. Kill that using Task Manager and start again.

I had the same problem already twice since I upgraded to Android Studio 2.0 on Windows 10. I use a preferred emulator in the Run/Debug configuration. Changing the Deployment Target Options in the configuration to Target: Show Device Chooser Dialog solved it for me. After choosing the same emulator instance in the dialog it started with no problem. Then I change back to the preferred emulator setting. Until the next time it breaks...
Hoping this helps.

I faced the same problem in Windows 10.
Clearing temp and %temp% folder followed by a restart of machine solved my problem.

I had this problem, when I didn't notice that emulator is already running :)