Puck button integration with android device.

does setAdvertising advertises data just once?

No, it keeps advertising every 350ms (or however long you specified in NRF.setAdvertising) forever after.

when Android side code will get Puck bluetooth info, it will get access to this data too.

The Puck's name and the advertised data are sent in the same packet, so should arrive in Android together.

I'm not 100% sure if they're exposed that way, but it seems like it.

I get some data in array but not sure how to interpret it.

This might help? http://stackoverflow.com/questions/22016224/ble-obtain-uuid-encoded-in-advertising-packet?answertab=active#tab-top