Android has a Linux kernel, but developing the apps and the APIs used for this system are different from the ones we have in GNU / Linux. That is why we cannot run apps from this Google operating system in our Linux distro in a simple way. We need some emulator or software to help us generate a compatibility layer in a similar way to how Wine does for native Microsoft Windows software.
There are several of these projects that can help us run Android applications within our GNU / Linux distro, but if you want a simple one, that is anbox. It is a compatibility layer, just like Wine, and of course it is also open source and free. Its objective is to be able to run any Android application on other Linux operating systems, and it fulfills its objective well as other projects such as Genimobile, Shashlik, etc.
The biggest difference of Anbox with respect to the alternatives is that it will use the kernel of our distribution. That is to say, use the same Linux kernel and extends this compatibility layer on it instead of using a different modified kernel as in other emulators. This allows us to work in a lighter and more intimate way with the hardware of our team, instead of fattening the project or putting "intermediaries".
For install it, we can use universal packages Snap, universal packages that can be used in any distro and makes things much easier. However, you can also use the repositories and package managers of each distro for this ... Then, once we have it installed and configured, the next step is to install the app we want (.apk) and use it without further ado. If you want to see details of this whole process that is slightly different in each distro, you can find all the information well explained and step by step in the official website of the anbox.io project.