SO_REUSEPORT unavailable on compiling system to run emulator for andriod on Ubuntu

Question

I was trying to install SDK and Emulator without the Andriod studio on Ubuntu 20.04. But got stuck at this error.

E0520 11:06:29.866803544    5261 socket_utils_c         


        

Answer 1

Though not directly affected by the error you described, when stuck at this point (namely, when supposed to be connecting back to the ADB server, but can't), this can be a result of a corrupted quick-boot snapshot.

What worked for me is to hard-delete the existing quick-boot snapshot, and have the emulator regenerate it on the next run.

To delete the snapshots:

rm -fr ~/.android/avd//snapshots/default_boot

To regenerate the next snapshot, rerun the emulator as you normally would, then kill it after if full loads. But first, make sure that it is configured for saving a quick-boot snapshot on exit:

Edit quickbootChoice.ini, for example:

vi ~/.android/avd//quickbootChoice.ini

The only line there should be:

saveOnExit = true

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If you wish to see whether any of this is likely to help you before making any changes, run the emulator with the -no-snapshot argument applied, beforehand. For example:

$ANDROID_SDK_ROOT/emulator/emulator -no-snapshot @Pixel_API_29 &

(Or find a way to do this through Android Studio)

A note regarding other answers here that advised configuring the camera differently (which seems unrelated): It is very likely that changing the camera setting, for the Emulator, is considered a configuration change - which ends up in forcing a cold-boot (i.e. skipping usage of the quick-boot snapshot), which can explain why it works (but with no voodoo involved).