Install Magisk On Official Android Emulator

Works on Android API 22 - 29 (except 28)

1. For patching the ramdisk with magisk, your AVD must be already created
2. Make sure you backup the untouched ramdisk.img from <sdk_home>/system-images/<platform>/*/ramdisk.img. You will need it everytime you want to patch ramdisk with magisk (for the first time and also for subsequent magisk updates).
3. Clone this repository and copy the original ramdisk.img into the clone's folder.
4. Start the newly created AVD.
5. Execute patch.sh or patch.bat to install Magisk on the ramdisk.img (you can execute patch.sh canary or patch.bat canary to install latest canary Magisk on the ramdisk.img)
6. When finished, copy the patched ramdisk.img back to AVD directory.
7. Restart (cold start) emulator
8. Recommended: update magisk manager
9. Enjoy Magisk :)

Install Magisk On Android x86 Project on VirtualBox

Only test on Android 8.1

0. Grab Magisk.zip and put in this directory.
1. Bring up Android system and establish adb connection.
2. Execute prepare_image.sh or prepare_image.bat to grab initrd.img and ramdisk.img on hard drive.
3. Execute patch_vbox.sh or patch_vbox.bat to patch initrd.img and ramdisk.img
4. Execute install_vbox.sh or install_vbox.bat to install patched images on hard drive.
5. Restart machine and enjoy Magisk :)

Reference: topjohnwu/Magisk#2551 (comment)