Waydroid is a container-based approach to boot a full Android system on a regular GNU/Linux system like Ubuntu.
Waydroid uses Linux namespaces (user, pid, uts, net, mount, ipc) to run a full Android system in a container and provide Android applications on any GNU/Linux-based platform.
The Android inside the container has direct access to needed hardwares.
The Android runtime environment ships with a minimal customized Android system image based on the LineageOS. The used image is currently based on Android 10
You can install Android applications from the command line.
waydroid app install xyz.apkThe apk files you will sometimes find on the internet tend to only have arm support, and will therefore not work on x86_64.
You may want to install F-Droid to get applications graphically. Note that the Google Play Store will not work as is, because it relies on the proprietary Google Play Services, which are not installed.
If you have found an issue with Waydroid, please file a bug.
If you want to get in contact with the developers please feel free to join the WayDroid groups in Matrix or Telegram.