[AndroidStudio] How to Root Android Studio Emulator (AVD)

* Change red-colored names.

1. Create a new AVD. (named Nexus6 here)

2. Check the directory of Android SDK ($SDK_PATH) and start emulator with args as following.

$ SDK_PATH/emulator/emulator -avd Nexus6 -writable-system -selinux permissive -qemu -enable-kvm

In my case, "-qemu -enable-kvm" didn't work on MacOS, so I skipped those args.

3. If the device is booted, restart adbd as root and remount system.

$ adb root
$ adb remount

If adb command doesn't exist, make sure to add PATH.
Mine was located in ~/Library/Android/sdk/platform-tools.

4. Download and install Superuser.apk

$ git clone https://github.com/0xFireball/root_avd.git

$ cd root_avd

$ adb install SuperSU/common/Superuser.apk

5. Pick the corresponding architecture and save it as variable $ARCH.
Then push su, update permissions, and set SELinux peprmissive.

$ ARCH=x86
$ adb push SuperSU/$ARCH/su/system/xbin/su
$ adb shell chmod 0755 /system/xbin/su

$ adb shell setenforce 0

6. Install SuperSU's su to system and run as daemon.

$ adb shell su --install
$ adb shell su --daemon&

7. Open SuperSU app on the device and update su binary. Use normal installation.

8. You can ignore the message "Installation will fail".

TIP: Superuser may not always persist after reboot, to fix:

From a root shell, start su --daemon&
Root should now work.
Optional: Look for the temporary emulator system image; you can back this up and use it as a patched system.

Coding HAMA