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

In my case, I use a avd( Based on: Android 8.0 (Oreo) Tag/ABI: google_apis/x86_64 ).

$ emulator -avd Nexus_5X_API_26_APIs -writable-system 
$ adb root 
$ adb remount

Then, /system is writeable.

$ adb push somefile /system/bin/ is work.