Waiting for Target Device to Come Online

Question

I recently updated to Android Studio 2.3, and now when I try to run the application, the emulator does not come online. It times out after 300 seconds.

Additionally,

Answer 1

Did not read all the answers. Anyway Accepted one didn't work for me. What did was upgrading the android studio to last stable version and then created a new virtual device. I guess my nexus 5p virtual device got out of sync with the android studio environment.

Answer 2

None of solutions above worked for me, so I had to wipe content of

C:\Users\your_name\.android\avd

and re-create emulated device

Answer 3

I've had the same problem (AVD not coming online) in a Linux system. In my case, I have solved it setting this environment variable:

$ export ANDROID_EMULATOR_USE_SYSTEM_LIBS = 1

This case is documented here: https://developer.android.com/studio/command-line/variables.html#studio_jdk

Answer 4

Check you don't have the deviced unauthorized, unauthorized devices reply the same error in the Android Studio, check the emulator once is on with the adb command.

$ adb devices

List of devices attached

emulator-5554 unauthorized

If you have of this way the emulator the Android Studio is waiting for be authorized and maybe this can solve the problem.

Authorized Devices

This is a error I have solved in Windows 10 with Android Studio 2.3.3

Answer 5

1. Another case is Android Emulator should be reinstalled. This can happen, when you install a higher version of Android Studio, then update SDK for it, and go back to previous one.

   Tools - Android - SDK Manager - SDK Tools - Android Emulator - uncheck, apply, check, apply

2. Disable Docker app if you have it (Mac users).

3. Restart emulator:

   Tools - Android - AVD Manager (or kill adb process in task manager).

Answer 6

Below steps work for me

1. Close running emulator
2. Go to AVD Manager
3. Choose available emulator
4. In that action tab (last one), click on drop down arrow & select COLD BOOT NOW
5. Finally run your application