The mobile payments solution will be available on all near field communication NFC -enabled Android devices running KitKat 4.4 and above.
The application doesn't need to be open to make the transaction and does not require any user input for payments of less than £30.
The technology will work anywhere that contactless payment is available now, including many commercial outlets and on public facilities such as the Transport for London transport network.
Android Pay works with both MasterCard and Visa as well as banks including Bank of Scotland, First Direct, Halifax, HSBC, Lloyds Bank, M Bank, mbna and Nationwide.
Barclays is notably absent from the list, having unveiled plans to launch its own contactless mobile payments solution in June.
It is also a more secure way of paying than a card, as it can be used to add additional layers of authentication such as fingerprints.