First begin by opening a terminal and installing the necessary packages.
sudo pacman -Sy android-appsupport
Then, edit /etc/modules-load.d/anbox.conf with a text editor (for example, nano)
sudo nano /etc/modules-load.d/anbox.conf
Paste the following into the file:
binder_linux
ashmem_linux
Then use Ctrl S and Ctrl X to save and exit.
Enable the container service:
sudo systemctl enable --now anbox-container-manager.service
Reboot!
Then you can open the Anbox app
Install the android-tools package:
sudo pacman -S android-tools
Then you can install your app using:
adb install ./path/to/app.apk