Source: http://gizmodo.com/5605866/android-users-can-now-bump-phones-to-send-money-via-paypal
The PayPal Mobile app for Android has received an update that features bump technology just like its iPhone counterpart. This means that Android users can now simply bump their devices together to send money.
There's also a new feature "which lets you automatically calculate the total cost of a bill and then collect money directly from friends when out to dinner."
The app is free and available on the Android Market now. [PayPal Blog]