How to make system partition in AVD in emulator writable

Question

This is fairly a very old question but I am surprised that none of the solutions are working for me. I need to run an android app as system app in an AVD (in emulator) creat

Answer 1

When working with Q, this is the only solution that worked for me: https://stackoverflow.com/a/64397712/1898527

Adding here the steps for completion (kudos to the original author):

> emulator -avd Pixel_3a_XL_API_29 -writable-system
> adb shell avbctl disable-verification
> adb disable-verity

Now reboot your emulator so that the changes take effect.

> adb root
> adb remount
> adb shell "su 0 mount -o rw,remount /system"

Note: you will need an emulator without Google Play, otherwise this won't work. You can get it by following the steps described here: https://stackoverflow.com/a/45668555/1898527