Unable to launch emulator

#1

Hi all, I am new to Expo. I have been editing my code using Sublime. I wanted to debug my app using emulator but I not sure how do I create an emulator.

When I selected the ‘Open in Android’ from Expo, it shows me these error messages:

Couldn’t start project on Android: Error running adb: No Android device found. Please connect a device and follow the instructions here to enable USB debugging:
https://developer.android.com/studio/run/device.html#developer-device-options. If you are using Genymotion go to Settings -> ADB, select “Use custom Android SDK tools”, and point it at your Android SDK directory.

Any ideas? Thanks in advanced!

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#2

hi-

Did you follow the instructions in the error message?
Did doing that work?

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#3

Hi, yes I installed the genymotion and Oracle virtual box. I followed the guideline to choose Nexus 5 as virtual device on genymotion, but upon launching the virtual device, it told me virtualBox cannot start virtual device.

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