Change addresses and key backup on Bitcoin Wallet for Android I've had the  Bitcoin Wallet for Android for some time. When I installed it I was assigned some public address/key. I have made various transactions in and out of the wallet but as fas as I can tell the address has not changed.

Does Android Wallet not transfer change from a transaction into a new address?

I actually don’t want it to do this. I want one fixed address I can use to send and receive coins. I also expected that the private key I backed-up early on would still be valid.

If change addresses are created does this mean I have to backup my keys after every transaction?
Android Bitcoin Wallet does not send change to a new address. You don't need to re-backup your keys unless you explicitly generate a new address.