The tap-to-pay system will compete with Apple Pay in the burgeoning mobile payments market.
The market is estimated to be worth $1tn (£650bn) in 2017.
Technology companies are trying to convince shoppers to use their handsets, rather than plastic cards, to pay for purchases.
Android Pay can be used with smartphones that have near-field communication (NFC) capability and Google's KitKat 4.4+ operating system.
