Connect to regnet from my WalletAppKit Android app
If you're connecting to a bitcoind regtest node and you're trying to connect as an RPC client to it via bitcoinj, it's possible.

Figure out what your Android's IP address is, say x.y.z.w and use the -rpcallowip parameter in bitcoind to allow your (remote) Android app to talk to the regtest bitcoind node.

Spawn bitcoind like this, for example:

bitcoind -debug=1 -printtoconsole -server \
    -regtest -listen -rpcport=8332        \
    -rpcuser=yourrpcuser -rpcpassword=yourrpcpass -rpcallowip=18.138.5.97


WARNING: Security-wise, keep in mind that the RPC password is transmitted over the network in plaintext.