I have a Bluetooth controller on the way from Amazon that can function standalone or cradle a phone. This one here, by recommendation of Noise:
I'm likely going to be purchasing a MXQ Adroid TV Box as well so I can enjoy these emulators (and Google Play titles) on the go or on my game room TV. I digress...
What Android retro emulators are you running?
I'll be looking mostly at Atari 7800 through end of 4th gen (Sega CD, PCE CD, etc). 5th gen is a bonus, but I know it's spotty.
Controller support highly preferred. I saw SNES9x supports joypads but is extremely laggy. Nostalgia.NES runs great with a Bluetooth controller per reviews.
I wanted to start a dedicated thread on emulation specifically, but as I mentioned over in the Google games thread: I did get both Nostalgia.NES & RetroArch emulators both running. I started up Dragon Warrior IV to test it... 30 minutes later and 2 level ups later , I'm very impressed with how sharp it looks on the small screen. Nostalgia runs great & the save state options are clean. Keep in mind I haven't tested a controller yet (will do soon, reportedly handles well). RA is a bit cumbersome as advertised. I did get the FCEU NES core running. I'll lean more on RA if there isn't a good a la carte option available. I think playing these retro games, especially RPGS, in bite size chunks, on the go with save states, will be great for me with 2 kiddos & little spare time.