Yes. Any device, be it android phone or computer that can access the internet can as well be affected by virus. Additionally, as long these devices are making use of applications or programs/softwares, there is likelihood for them to be vulnerable to virus attacks, because these programs with other important files in the devices, are the perfect gateways for these virus to invade these devices.
In a nutshell, virus is a program designed to either steal or damage important data and information in computing devices. Computing devices here include smartphones that are capable of processing data into meaningful information. There are numerous types of virus which are specifically programed to attack other vital programs/softwares in devices.
For virus not have their ways into our devices, we need to have powerful anti-virus programs in our devices. With the presence of this anti-virus, our devices are protected against virus attacks.