I have recently installed android studio and all its update using sdks manager. When i try to start the emulator i can see this:
emulator -netdelay none -netspeed full -avd Nexus_5_API_21_x86
HAX is working and emulator runs in fast virt mode
It seems good. The emulator start but only thing i can see is a black screen. I use the default AVD created by the app. It has google api's x86 system image, 1gb ram, 64mb vm heap and 200mb intel storage. I tried to uncheck "Use Host GPU" but it did not solve the problem.
I have recently the same issue in emulator, Nexus 5 (Android O). I have go to Android Virtual Device Manager and Wipe User Data and it solved my Problem.
I ran into this issue, and what solved it for me was unchecking everything that has to do with snapshots.
I assume that my snapshot was corrupt somehow.
Uncheck loading and saving to snapshots.
I ran into the same your issue, this is what I did that works: My one starts working with Nexus_4_API_25 (tried even with Nexus 6, Nexus 5 and Nexus One none of them was working!!) Create a new ADV from Android Studio ( bare in mind that i didn't allow the new front and rear camera to the new device, so switch them off) So go to Terminal and go to the folder where your emulator is and lists your emulators, my one:
~/Library/Android/sdk/tools/emulator -list-avds
After run your emulator with the gpu hosted on your machine:
~/Library/Android/sdk/tools/emulator -avd Nexus_4_API_25 -gpu host
It will start the emulator and then you can run your app in it. Hopefully this can helps someone else.
Also look at your skins - some have found it works with the WVGA800 skin. Others here have found it's due to the high RAM requirements of the Nexus 5 AVD itself. I think Nexus 5 takes almost 1600. Try either decreasing the RAM allocation in the AVD ('Advanced settings') - or reinstall HAXM with a higher RAM limit.
Faced the same issue, I solved by reducing the AVD version. In the AVD manager choose create a lower version e.g. I was using Nexus 5 and created a Nexus 4 which worked well.
If this solves it means you need to upgrade your machine, RAM etc.
Same problem for me, I solved it by using x86_64 system image instead of x84, maybe x86 image has some bug on some host system, e.g. Windows 10.
if you have avast antivirus installed In Avast antivirus under Settings (parametres) tab > Troubleshooting (depannage), you should uncheck "Enable Hardware-assisted Virtualization" ("activer l'assistance a la virtualisation").
Now restart your computer it should work if not re-install the Intel's HAXM which can be found under ~SDK_LOCATION\extras\intel\Hardware_Accelerated_Execution_Manager
I had the same issue that the x86 emulator would hang during startup (black screen, no logo). The answer to my problem had to do with me using Eclipse ADT with an old SDK prior to upgrading to Android Studio on the same computer.
I am running Ubuntu and the configuration files are stored in the .android folder of the home directory, i.e. ~/.android. I saw references to the old SDKs in the config files and deleted the whole folder. After that the x86 emulator started working again.
In hindsight, what gave it away was that when I started using ARM images the emulator worked. I had only used x86 images with qemu in the past.
来源：https://stackoverflow.com/questions/27864774/android-emulator-black-screen